--- /dev/null
+ GNU LESSER GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+ This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+ 0. Additional Definitions.
+
+ As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+ "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+ An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+ A "Combined Work" is a work produced by combining or linking an
+Application with the Library. The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+ The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+ The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+ 1. Exception to Section 3 of the GNU GPL.
+
+ You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+ 2. Conveying Modified Versions.
+
+ If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+ a) under this License, provided that you make a good faith effort to
+ ensure that, in the event an Application does not supply the
+ function or data, the facility still operates, and performs
+ whatever part of its purpose remains meaningful, or
+
+ b) under the GNU GPL, with none of the additional permissions of
+ this License applicable to that copy.
+
+ 3. Object Code Incorporating Material from Library Header Files.
+
+ The object code form of an Application may incorporate material from
+a header file that is part of the Library. You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+ a) Give prominent notice with each copy of the object code that the
+ Library is used in it and that the Library and its use are
+ covered by this License.
+
+ b) Accompany the object code with a copy of the GNU GPL and this license
+ document.
+
+ 4. Combined Works.
+
+ You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+ a) Give prominent notice with each copy of the Combined Work that
+ the Library is used in it and that the Library and its use are
+ covered by this License.
+
+ b) Accompany the Combined Work with a copy of the GNU GPL and this license
+ document.
+
+ c) For a Combined Work that displays copyright notices during
+ execution, include the copyright notice for the Library among
+ these notices, as well as a reference directing the user to the
+ copies of the GNU GPL and this license document.
+
+ d) Do one of the following:
+
+ 0) Convey the Minimal Corresponding Source under the terms of this
+ License, and the Corresponding Application Code in a form
+ suitable for, and under terms that permit, the user to
+ recombine or relink the Application with a modified version of
+ the Linked Version to produce a modified Combined Work, in the
+ manner specified by section 6 of the GNU GPL for conveying
+ Corresponding Source.
+
+ 1) Use a suitable shared library mechanism for linking with the
+ Library. A suitable mechanism is one that (a) uses at run time
+ a copy of the Library already present on the user's computer
+ system, and (b) will operate properly with a modified version
+ of the Library that is interface-compatible with the Linked
+ Version.
+
+ e) Provide Installation Information, but only if you would otherwise
+ be required to provide such information under section 6 of the
+ GNU GPL, and only to the extent that such information is
+ necessary to install and execute a modified version of the
+ Combined Work produced by recombining or relinking the
+ Application with a modified version of the Linked Version. (If
+ you use option 4d0, the Installation Information must accompany
+ the Minimal Corresponding Source and Corresponding Application
+ Code. If you use option 4d1, you must provide the Installation
+ Information in the manner specified by section 6 of the GNU GPL
+ for conveying Corresponding Source.)
+
+ 5. Combined Libraries.
+
+ You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+ a) Accompany the combined library with a copy of the same work based
+ on the Library, uncombined with any other library facilities,
+ conveyed under the terms of this License.
+
+ b) Give prominent notice with the combined library that part of it
+ is a work based on the Library, and explaining where to find the
+ accompanying uncombined form of the same work.
+
+ 6. Revised Versions of the GNU Lesser General Public License.
+
+ The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+ If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.
--- /dev/null
+ GNU LESSER GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+ This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+ 0. Additional Definitions.
+
+ As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+ "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+ An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+ A "Combined Work" is a work produced by combining or linking an
+Application with the Library. The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+ The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+ The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+ 1. Exception to Section 3 of the GNU GPL.
+
+ You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+ 2. Conveying Modified Versions.
+
+ If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+ a) under this License, provided that you make a good faith effort to
+ ensure that, in the event an Application does not supply the
+ function or data, the facility still operates, and performs
+ whatever part of its purpose remains meaningful, or
+
+ b) under the GNU GPL, with none of the additional permissions of
+ this License applicable to that copy.
+
+ 3. Object Code Incorporating Material from Library Header Files.
+
+ The object code form of an Application may incorporate material from
+a header file that is part of the Library. You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+ a) Give prominent notice with each copy of the object code that the
+ Library is used in it and that the Library and its use are
+ covered by this License.
+
+ b) Accompany the object code with a copy of the GNU GPL and this license
+ document.
+
+ 4. Combined Works.
+
+ You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+ a) Give prominent notice with each copy of the Combined Work that
+ the Library is used in it and that the Library and its use are
+ covered by this License.
+
+ b) Accompany the Combined Work with a copy of the GNU GPL and this license
+ document.
+
+ c) For a Combined Work that displays copyright notices during
+ execution, include the copyright notice for the Library among
+ these notices, as well as a reference directing the user to the
+ copies of the GNU GPL and this license document.
+
+ d) Do one of the following:
+
+ 0) Convey the Minimal Corresponding Source under the terms of this
+ License, and the Corresponding Application Code in a form
+ suitable for, and under terms that permit, the user to
+ recombine or relink the Application with a modified version of
+ the Linked Version to produce a modified Combined Work, in the
+ manner specified by section 6 of the GNU GPL for conveying
+ Corresponding Source.
+
+ 1) Use a suitable shared library mechanism for linking with the
+ Library. A suitable mechanism is one that (a) uses at run time
+ a copy of the Library already present on the user's computer
+ system, and (b) will operate properly with a modified version
+ of the Library that is interface-compatible with the Linked
+ Version.
+
+ e) Provide Installation Information, but only if you would otherwise
+ be required to provide such information under section 6 of the
+ GNU GPL, and only to the extent that such information is
+ necessary to install and execute a modified version of the
+ Combined Work produced by recombining or relinking the
+ Application with a modified version of the Linked Version. (If
+ you use option 4d0, the Installation Information must accompany
+ the Minimal Corresponding Source and Corresponding Application
+ Code. If you use option 4d1, you must provide the Installation
+ Information in the manner specified by section 6 of the GNU GPL
+ for conveying Corresponding Source.)
+
+ 5. Combined Libraries.
+
+ You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+ a) Accompany the combined library with a copy of the same work based
+ on the Library, uncombined with any other library facilities,
+ conveyed under the terms of this License.
+
+ b) Give prominent notice with the combined library that part of it
+ is a work based on the Library, and explaining where to find the
+ accompanying uncombined form of the same work.
+
+ 6. Revised Versions of the GNU Lesser General Public License.
+
+ The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+ If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.
--- /dev/null
+#
+# Makefile:
+# wiringPi - Wiring Compatable library for the Raspberry Pi
+# https://projects.drogon.net/wiring-pi
+#
+# Copyright (c) 2012 Gordon Henderson
+#################################################################################
+# This file is part of wiringPi:
+# Wiring Compatable library for the Raspberry Pi
+#
+# wiringPi is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# wiringPi is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
+#################################################################################
+
+
+#DEBUG = -g -O0
+DEBUG = -O3
+CC = gcc
+INCLUDE = -I/usr/local/include
+CFLAGS = $(DEBUG) -Wall $(INCLUDE) -Winline -pipe
+
+LDFLAGS = -L/usr/local/lib
+LIBS = -lwiringPi
+
+# Should not alter anything below this line
+###############################################################################
+
+SRC = test1.c test2.c speed.c lcd.c wfi.c piface.c gertboard.c nes.c delayTest.c
+
+OBJ = test1.o test2.o speed.o lcd.o wfi.o piface.o gertboard.o nes.o delayTest.o
+
+all: test1 test2 speed lcd wfi piface gertboard nes
+
+test1: test1.o
+ @echo [link]
+ $(CC) -o $@ test1.o $(LDFLAGS) $(LIBS)
+
+test2: test2.o
+ @echo [link]
+ $(CC) -o $@ test2.o $(LDFLAGS) $(LIBS)
+
+speed: speed.o
+ @echo [link]
+ $(CC) -o $@ speed.o $(LDFLAGS) $(LIBS)
+
+lcd: lcd.o
+ @echo [link]
+ $(CC) -o $@ lcd.o $(LDFLAGS) $(LIBS)
+
+wfi: wfi.o
+ @echo [link]
+ $(CC) -o $@ wfi.o $(LDFLAGS) $(LIBS) -lpthread
+
+piface: piface.o
+ @echo [link]
+ $(CC) -o $@ piface.o $(LDFLAGS) $(LIBS) -lpthread
+
+gertboard: gertboard.o
+ @echo [link]
+ $(CC) -o $@ gertboard.o $(LDFLAGS) $(LIBS) -lm
+
+nes: nes.o
+ @echo [link]
+ $(CC) -o $@ nes.o $(LDFLAGS) $(LIBS) -lm
+
+
+delayTest: delayTest.o
+ @echo [link]
+ $(CC) -o $@ delayTest.o $(LDFLAGS) $(LIBS)
+
+
+.c.o:
+ @echo [CC] $<
+ @$(CC) -c $(CFLAGS) $< -o $@
+
+clean:
+ rm -f $(OBJ) *~ core tags test1 test2 speed lcd wfi piface gertboard nes delayTest
+
+tags: $(SRC)
+ @echo [ctags]
+ @ctags $(SRC)
+
+depend:
+ makedepend -Y $(SRC)
+
+# DO NOT DELETE
--- /dev/null
+
+#include <stdio.h>
+#include <unistd.h>
+#include <wiringPi.h>
+
+#include <time.h>
+#include <sys/types.h>
+#include <sys/time.h>
+
+#define CYCLES 1000
+#define DELAY 99
+
+int main()
+{
+ int x ;
+ struct timeval t1, t2 ;
+ long long t ;
+ unsigned int max, min ;
+
+ unsigned int values [CYCLES] ;
+
+ max = 0 ;
+ min = 1000000 ;
+
+ if (wiringPiSetup () == -1)
+ return 1 ;
+
+ piHiPri (10) ;
+ sleep (1) ;
+
+// Baseline test
+
+ gettimeofday (&t1, NULL) ;
+ gettimeofday (&t2, NULL) ;
+
+ t = t2.tv_usec - t1.tv_usec ;
+ printf ("Baseline test: %lld\n", t);
+
+ for (x = 0 ; x < CYCLES ; ++x)
+ {
+ gettimeofday (&t1, NULL) ;
+ delayMicroseconds (DELAY) ;
+ gettimeofday (&t2, NULL) ;
+
+ t = t2.tv_usec - t1.tv_usec ;
+ if (t > max) max = t ;
+ if (t < min) min = t ;
+ values [x] = t ;
+ }
+
+ printf ("Done: Max: %d, min: %d\n", max, min) ;
+
+ for (x = 0 ; x < CYCLES ; ++x)
+ {
+ printf ("%4d", values [x]) ;
+ if (values [x] > DELAY)
+ printf (".") ;
+ else if (values [x] < DELAY)
+ printf ("-") ;
+ else
+ printf (" ") ;
+ if (((x + 1) % 20) == 0)
+ printf ("\n") ;
+ }
+ printf ("\n") ;
+
+ return 0 ;
+}
--- /dev/null
+
+/*
+ * gertboard.c:
+ * Simple test for the SPI bus on the Gertboard
+ *
+ * Hardware setup:
+ * D/A port 0 jumpered to A/D port 0.
+ *
+ * We output a sine wave on D/A port 0 and sample A/D port 0. We then
+ * copy this value to D/A port 1 and use a 'scope on both D/A ports
+ * to check all's well.
+ *
+ */
+
+#include <stdio.h>
+#include <stdint.h>
+//#include <stdlib.h>
+#include <math.h>
+
+#include <wiringPi.h>
+#include <gertboard.h>
+
+int main (void)
+{
+ int angle ;
+ int h1 ;
+ uint32_t x1 ;
+
+ printf ("Raspberry Pi Gertboard SPI test program\n") ;
+
+ if (gertboardSPISetup () == -1)
+ return 1 ;
+
+ for (;;)
+ {
+ for (angle = 0 ; angle < 360 ; ++angle)
+ {
+ h1 = (int)rint (sin ((double)angle * M_PI / 180.0) * 127.0 + 128.0) ;
+ gertboardAnalogWrite (0, h1) ;
+
+ x1 = gertboardAnalogRead (0) ;
+ gertboardAnalogWrite (1, x1 >> 2) ; // 10-bit A/D, 8-bit D/A
+ }
+ }
+
+ return 0 ;
+}
--- /dev/null
+/*
+ * lcd.c:
+ * Text-based LCD driver.
+ * This is designed to drive the parallel interface LCD drivers
+ * based in the Hitachi HD44780U controller and compatables.
+ *
+ * Copyright (c) 2012 Gordon Henderson.
+ ***********************************************************************
+ * This file is part of wiringPi:
+ * https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ * wiringPi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * wiringPi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#include <unistd.h>
+#include <string.h>
+#include <time.h>
+
+#include <wiringPi.h>
+#include <lcd.h>
+
+int main (void)
+{
+ int i, j ;
+ int fd1, fd2 ;
+
+ char message1 [256] ;
+ char message2 [256] ;
+ char buf1 [30] ;
+ char buf2 [30] ;
+
+ struct tm *t ;
+ time_t tim ;
+
+ printf ("Raspberry Pi LCD test program\n") ;
+
+ if (wiringPiSetup () == -1)
+ exit (1) ;
+
+ fd1 = lcdInit (4, 20, 4, 8, 9, 4,5,6,7,0,0,0,0) ;
+ fd2 = lcdInit (2, 16, 4, 8, 10, 4,5,6,7,0,0,0,0) ;
+
+//fd1 = lcdInit (4, 20, 8, 8, 9, 0,1,2,3,4,5,6,7) ;
+//fd2 = lcdInit (2, 16, 8, 8, 10, 0,1,2,3,4,5,6,7) ;
+
+ if (fd1 == -1)
+ {
+ printf ("lcdInit 1 failed\n") ;
+ return 1 ;
+ }
+
+ if (fd2 == -1)
+ {
+ printf ("lcdInit 2 failed\n") ;
+ return 1 ;
+ }
+
+ sleep (1) ;
+
+ lcdPosition (fd1, 0, 0) ; lcdPuts (fd1, " Gordon Henderson") ;
+ lcdPosition (fd1, 0, 1) ; lcdPuts (fd1, " --------------") ;
+/*
+ lcdPosition (fd1, 0, 2) ; lcdPuts (fd1, " 00:00:00") ;
+ lcdPosition (fd1, 0, 3) ; lcdPuts (fd1, " DD:MM:YY") ;
+*/
+
+ lcdPosition (fd2, 0, 0) ; lcdPuts (fd2, "Gordon Henderson") ;
+ lcdPosition (fd2, 0, 1) ; lcdPuts (fd2, "----------------") ;
+
+ sleep (2) ;
+
+ sprintf (message1, "%s", " http://projects.drogon.net/ ") ;
+ sprintf (message2, "%s", " This is a long message to go into the smaller display just for a demonstration of what we can do. ") ;
+
+ for (;;)
+ {
+ i = 0 ;
+ j = 0 ;
+ for (;;)
+ {
+ strncpy (buf1, &message1 [i], 20) ;
+ buf1 [20] = 0 ;
+ lcdPosition (fd1, 0, 1) ;
+ lcdPuts (fd1, buf1) ;
+ ++i ;
+ if (i == strlen (message1) - 20)
+ i = 0 ;
+
+ strncpy (buf2, &message2 [j], 16) ;
+ buf2 [16] = 0 ;
+ lcdPosition (fd2, 0, 1) ;
+ lcdPuts (fd2, buf2) ;
+ ++j ;
+ if (j == strlen (message2) - 16)
+ j = 0 ;
+
+ tim = time (NULL) ;
+ t = localtime (&tim) ;
+
+ sprintf (buf1, "%02d:%02d:%02d", t->tm_hour, t->tm_min, t->tm_sec) ;
+ lcdPosition (fd1, 5, 2) ;
+ lcdPuts (fd1, buf1) ;
+
+ sprintf (buf1, "%02d/%02d/%02d", t->tm_mday, t->tm_mon + 1, t->tm_year+1900) ;
+ lcdPosition (fd1, 4, 3) ;
+ lcdPuts (fd1, buf1) ;
+
+ delay (250) ;
+ }
+ }
+
+ return 0 ;
+}
--- /dev/null
+
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+
+#include <wiringPi.h>
+#include <piNes.h>
+
+#define BLANK "| "
+
+int main ()
+{
+ int joystick ;
+ unsigned int buttons ;
+
+ if (wiringPiSetup () == -1)
+ {
+ fprintf (stdout, "oops: %s\n", strerror (errno)) ;
+ return 1 ;
+ }
+
+ if ((joystick = setupNesJoystick (2, 1, 0)) == -1)
+ {
+ fprintf (stdout, "Unable to setup joystick\n") ;
+ return 1 ;
+ }
+
+ for (;;)
+ {
+ buttons = readNesJoystick (joystick) ;
+
+ if ((buttons & NES_UP) != 0) printf ("| UP " ) ; else printf (BLANK) ;
+ if ((buttons & NES_DOWN) != 0) printf ("| DOWN " ) ; else printf (BLANK) ;
+ if ((buttons & NES_LEFT) != 0) printf ("| LEFT " ) ; else printf (BLANK) ;
+ if ((buttons & NES_RIGHT) != 0) printf ("|RIGHT " ) ; else printf (BLANK) ;
+ if ((buttons & NES_SELECT) != 0) printf ("|SELECT" ) ; else printf (BLANK) ;
+ if ((buttons & NES_START) != 0) printf ("|START " ) ; else printf (BLANK) ;
+ if ((buttons & NES_A) != 0) printf ("| A " ) ; else printf (BLANK) ;
+ if ((buttons & NES_B) != 0) printf ("| B " ) ; else printf (BLANK) ;
+ printf ("|\n") ;
+ }
+
+ return 0 ;
+}
--- /dev/null
+
+/*
+ * piface.c:
+ * Simple test for the PiFace
+ *
+ * Read the buttons and output the same to the LEDs
+ */
+
+#include <wiringPi.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+int outputs [4] = { 0,0,0,0 } ;
+
+void scanButton (int button)
+{
+ if (digitalRead (button) == LOW)
+ {
+ outputs [button] ^= 1 ;
+ digitalWrite (button, outputs [button]) ;
+ }
+
+ while (digitalRead (button) == LOW)
+ delay (1) ;
+}
+
+
+int main (void)
+{
+ int pin, button ;
+
+ printf ("Raspberry Pi wiringPiFace test program\n") ;
+
+ if (wiringPiSetupPiFace () == -1)
+ exit (1) ;
+
+// Enable internal pull-ups
+
+ for (pin = 0 ; pin < 8 ; ++pin)
+ pullUpDnControl (pin, PUD_UP) ;
+
+
+ for (;;)
+ {
+ for (button = 0 ; button < 4 ; ++button)
+ scanButton (button) ;
+ delay (1) ;
+ }
+
+ return 0 ;
+}
--- /dev/null
+
+/*
+ * speed.c:
+ * Simple program to measure the speed of the various GPIO
+ * access mechanisms.
+ */
+
+#include <wiringPi.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#define FAST_COUNT 10000000
+#define SLOW_COUNT 1000000
+
+
+int main (void)
+{
+ int i ;
+ uint32_t start, end, count, sum, perSec ;
+
+ printf ("Raspberry Pi wiringPi speed test program\n") ;
+
+// Start the standard way
+
+ if (wiringPiSetup () == -1)
+ exit (1) ;
+
+ printf ("Native wiringPi method: (%8d iterations)\n", FAST_COUNT) ;
+
+ pinMode (0, OUTPUT) ;
+
+ sum = 0 ;
+ for (i = 0 ; i < 3 ; ++i)
+ {
+ printf (" Pass: %d: ", i) ;
+ fflush (stdout) ;
+
+ start = millis () ;
+ for (count = 0 ; count < FAST_COUNT ; ++count)
+ digitalWrite (0, 1) ;
+ end = millis () ;
+ printf (" %8dmS\n", end - start) ;
+ sum += (end - start) ;
+ }
+ digitalWrite (0, 0) ;
+ printf (" Average: %8dmS", sum / 3) ;
+ perSec = (int)(double)FAST_COUNT / (double)((double)sum / 3.0) * 1000.0 ;
+ printf (": %6d/sec\n", perSec) ;
+
+
+ printf ("Native GPIO method: (%8d iterations)\n", FAST_COUNT) ;
+
+ if (wiringPiSetupGpio () == -1)
+ exit (1) ;
+
+ pinMode (17, OUTPUT) ;
+
+ sum = 0 ;
+ for (i = 0 ; i < 3 ; ++i)
+ {
+ printf (" Pass: %d: ", i) ;
+ fflush (stdout) ;
+
+ start = millis () ;
+ for (count = 0 ; count < 10000000 ; ++count)
+ digitalWrite (17, 1) ;
+ end = millis () ;
+ printf (" %8dmS\n", end - start) ;
+ sum += (end - start) ;
+ }
+ digitalWrite (17, 0) ;
+ printf (" Average: %8dmS", sum / 3) ;
+ perSec = (int)(double)FAST_COUNT / (double)((double)sum / 3.0) * 1000.0 ;
+ printf (": %6d/sec\n", perSec) ;
+
+
+// Switch to SYS mode:
+
+ if (wiringPiSetupSys () == -1)
+ exit (1) ;
+
+ printf ("/sys/class/gpio method: (%8d iterations)\n", SLOW_COUNT) ;
+
+ sum = 0 ;
+ for (i = 0 ; i < 3 ; ++i)
+ {
+ printf (" Pass: %d: ", i) ;
+ fflush (stdout) ;
+
+ start = millis () ;
+ for (count = 0 ; count < SLOW_COUNT ; ++count)
+ digitalWrite (17, 1) ;
+ end = millis () ;
+ printf (" %8dmS\n", end - start) ;
+ sum += (end - start) ;
+ }
+ digitalWrite (17, 0) ;
+ printf (" Average: %8dmS", sum / 3) ;
+ perSec = (int)(double)SLOW_COUNT / (double)((double)sum / 3.0) * 1000.0 ;
+ printf (": %6d/sec\n", perSec) ;
+
+ return 0 ;
+}
--- /dev/null
+
+/*
+ * test1.c:
+ * Simple test program to test the wiringPi functions
+ */
+
+#include <wiringPi.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+
+// Simple sequencer data
+// Triplets of LED, On/Off and delay
+
+uint8_t data [] =
+{
+ 0, 1, 1,
+ 1, 1, 1,
+ 0, 0, 0, 2, 1, 1,
+ 1, 0, 0, 3, 1, 1,
+ 2, 0, 0, 4, 1, 1,
+ 3, 0, 0, 5, 1, 1,
+ 4, 0, 0, 6, 1, 1,
+ 5, 0, 0, 7, 1, 1,
+ 6, 0, 1,
+ 7, 0, 1,
+
+ 0, 0, 1, // Extra delay
+
+// Back again
+
+ 7, 1, 1,
+ 6, 1, 1,
+ 7, 0, 0, 5, 1, 1,
+ 6, 0, 0, 4, 1, 1,
+ 5, 0, 0, 3, 1, 1,
+ 4, 0, 0, 2, 1, 1,
+ 3, 0, 0, 1, 1, 1,
+ 2, 0, 0, 0, 1, 1,
+ 1, 0, 1,
+ 0, 0, 1,
+
+ 0, 0, 1, // Extra delay
+
+ 9, 9, 9, // End marker
+
+} ;
+
+
+int main (void)
+{
+ int pin ;
+ int dataPtr ;
+ int l, s, d ;
+
+ printf ("Raspberry Pi wiringPi test program\n") ;
+
+ if (wiringPiSetup () == -1)
+ exit (1) ;
+
+ for (pin = 0 ; pin < 8 ; ++pin)
+ pinMode (pin, OUTPUT) ;
+
+ pinMode (8, INPUT) ; // Pin 8 SDA0 - Has on-board 2k2 pull-up resistor
+
+ dataPtr = 0 ;
+
+ for (;;)
+ {
+ l = data [dataPtr++] ; // LED
+ s = data [dataPtr++] ; // State
+ d = data [dataPtr++] ; // Duration (10ths)
+
+ if ((l + s + d) == 27)
+ {
+ dataPtr = 0 ;
+ continue ;
+ }
+
+ digitalWrite (l, s) ;
+
+ if (digitalRead (8) == 0) // Pressed as our switch shorts to ground
+ delay (d * 10) ; // Faster!
+ else
+ delay (d * 100) ;
+ }
+
+ return 0 ;
+}
--- /dev/null
+
+/*
+ * test2.c:
+ * Simple test program to test the wiringPi functions
+ * PWM test
+ */
+
+#include <wiringPi.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+int main (void)
+{
+ int bright ;
+
+ printf ("Raspberry Pi wiringPi PWM test program\n") ;
+
+ if (wiringPiSetup () == -1)
+ exit (1) ;
+
+ pinMode (1, PWM_OUTPUT) ;
+
+ for (;;)
+ {
+ for (bright = 0 ; bright < 1024 ; ++bright)
+ {
+ pwmWrite (1, bright) ;
+ delay (1) ;
+ }
+
+ for (bright = 1023 ; bright >= 0 ; --bright)
+ {
+ pwmWrite (1, bright) ;
+ delay (1) ;
+ }
+ }
+
+ return 0 ;
+}
--- /dev/null
+/*
+ * wfi.c:
+ * Wait for Interrupt test program
+ *
+ * Copyright (c) 2012 Gordon Henderson.
+ ***********************************************************************
+ * This file is part of wiringPi:
+ * https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ * wiringPi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * wiringPi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <wiringPi.h>
+
+// A 'key' which we can lock and unlock - values are 0 through 3
+// This is interpreted internally as a pthread_mutex by wiringPi
+// which is hiding some of that to make life simple.
+
+#define COUNT_KEY 0
+
+// What BCM_GPIO input are we using?
+// GPIO 0 is one of the I2C pins with an on-board pull-up
+
+#define BUTTON_PIN 0
+
+// Debounce time in mS
+
+#define DEBOUNCE_TIME 100
+
+
+// globalCounter:
+// Global variable to count interrupts
+// Should be declared volatile to make sure the compiler doesn't cache it.
+
+static volatile int globalCounter = 0 ;
+
+
+/*
+ * waitForIt:
+ * This is a thread created using the wiringPi simplified threading
+ * mechanism. It will wait on an interrupt on the button and increment
+ * a counter.
+ *********************************************************************************
+ */
+
+PI_THREAD (waitForIt)
+{
+ int state = 0 ;
+ int debounceTime = 0 ;
+
+ (void)piHiPri (10) ; // Set this thread to be high priority
+ digitalWrite (18, 1) ;
+
+ for (;;)
+ {
+ if (waitForInterrupt (BUTTON_PIN, -1) > 0) // Got it
+ {
+
+// Bouncing?
+
+ if (millis () < debounceTime)
+ {
+ debounceTime = millis () + DEBOUNCE_TIME ;
+ continue ;
+ }
+
+// We have a valid one
+
+ digitalWrite (17, state) ;
+ state ^= 1 ;
+
+ piLock (COUNT_KEY) ;
+ ++globalCounter ;
+ piUnlock (COUNT_KEY) ;
+
+// Wait for key to be released
+
+ while (digitalRead (0) == LOW)
+ delay (1) ;
+
+ debounceTime = millis () + DEBOUNCE_TIME ;
+ }
+ }
+}
+
+
+/*
+ * setup:
+ * Demo a crude but effective way to initialise the hardware
+ *********************************************************************************
+ */
+
+void setup (void)
+{
+
+// Use the gpio program to initialise the hardware
+// (This is the crude, but effective bit)
+
+ system ("gpio edge 0 falling") ;
+ system ("gpio export 17 out") ;
+ system ("gpio export 18 out") ;
+
+// Setup wiringPi
+
+ wiringPiSetupSys () ;
+
+// Fire off our interrupt handler
+
+ piThreadCreate (waitForIt) ;
+
+ digitalWrite (17, 0) ;
+}
+
+
+/*
+ * main
+ *********************************************************************************
+ */
+
+int main (void)
+{
+ int lastCounter = 0 ;
+ int myCounter = 0 ;
+
+ setup () ;
+
+ for (;;)
+ {
+ printf ("Waiting ... ") ; fflush (stdout) ;
+
+ while (myCounter == lastCounter)
+ {
+ piLock (COUNT_KEY) ;
+ myCounter = globalCounter ;
+ piUnlock (COUNT_KEY) ;
+ delay (5000) ;
+ }
+
+ printf (" Done. myCounter: %5d\n", myCounter) ;
+ lastCounter = myCounter ;
+ }
+
+ return 0 ;
+}
--- /dev/null
+ GNU LESSER GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+ This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+ 0. Additional Definitions.
+
+ As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+ "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+ An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+ A "Combined Work" is a work produced by combining or linking an
+Application with the Library. The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+ The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+ The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+ 1. Exception to Section 3 of the GNU GPL.
+
+ You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+ 2. Conveying Modified Versions.
+
+ If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+ a) under this License, provided that you make a good faith effort to
+ ensure that, in the event an Application does not supply the
+ function or data, the facility still operates, and performs
+ whatever part of its purpose remains meaningful, or
+
+ b) under the GNU GPL, with none of the additional permissions of
+ this License applicable to that copy.
+
+ 3. Object Code Incorporating Material from Library Header Files.
+
+ The object code form of an Application may incorporate material from
+a header file that is part of the Library. You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+ a) Give prominent notice with each copy of the object code that the
+ Library is used in it and that the Library and its use are
+ covered by this License.
+
+ b) Accompany the object code with a copy of the GNU GPL and this license
+ document.
+
+ 4. Combined Works.
+
+ You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+ a) Give prominent notice with each copy of the Combined Work that
+ the Library is used in it and that the Library and its use are
+ covered by this License.
+
+ b) Accompany the Combined Work with a copy of the GNU GPL and this license
+ document.
+
+ c) For a Combined Work that displays copyright notices during
+ execution, include the copyright notice for the Library among
+ these notices, as well as a reference directing the user to the
+ copies of the GNU GPL and this license document.
+
+ d) Do one of the following:
+
+ 0) Convey the Minimal Corresponding Source under the terms of this
+ License, and the Corresponding Application Code in a form
+ suitable for, and under terms that permit, the user to
+ recombine or relink the Application with a modified version of
+ the Linked Version to produce a modified Combined Work, in the
+ manner specified by section 6 of the GNU GPL for conveying
+ Corresponding Source.
+
+ 1) Use a suitable shared library mechanism for linking with the
+ Library. A suitable mechanism is one that (a) uses at run time
+ a copy of the Library already present on the user's computer
+ system, and (b) will operate properly with a modified version
+ of the Library that is interface-compatible with the Linked
+ Version.
+
+ e) Provide Installation Information, but only if you would otherwise
+ be required to provide such information under section 6 of the
+ GNU GPL, and only to the extent that such information is
+ necessary to install and execute a modified version of the
+ Combined Work produced by recombining or relinking the
+ Application with a modified version of the Linked Version. (If
+ you use option 4d0, the Installation Information must accompany
+ the Minimal Corresponding Source and Corresponding Application
+ Code. If you use option 4d1, you must provide the Installation
+ Information in the manner specified by section 6 of the GNU GPL
+ for conveying Corresponding Source.)
+
+ 5. Combined Libraries.
+
+ You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+ a) Accompany the combined library with a copy of the same work based
+ on the Library, uncombined with any other library facilities,
+ conveyed under the terms of this License.
+
+ b) Give prominent notice with the combined library that part of it
+ is a work based on the Library, and explaining where to find the
+ accompanying uncombined form of the same work.
+
+ 6. Revised Versions of the GNU Lesser General Public License.
+
+ The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+ If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.
--- /dev/null
+#
+# Makefile:
+# wiringPi - Wiring Compatable library for the Raspberry Pi
+# https://projects.drogon.net/wiring-pi
+#
+# Copyright (c) 2012 Gordon Henderson
+#################################################################################
+# This file is part of wiringPi:
+# Wiring Compatable library for the Raspberry Pi
+#
+# wiringPi is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# wiringPi is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
+#################################################################################
+
+
+#DEBUG = -g -O0
+DEBUG = -O3
+CC = gcc
+INCLUDE = -I/usr/local/include
+CFLAGS = $(DEBUG) -Wall $(INCLUDE) -Winline -pipe
+
+LDFLAGS = -L/usr/local/lib
+LIBS = -lwiringPi
+
+# Should not alter anything below this line
+###############################################################################
+
+SRC = gpio.c
+
+OBJ = gpio.o
+
+all: gpio
+
+gpio: gpio.o
+ @echo [LD]
+ @$(CC) -o $@ gpio.o $(LDFLAGS) $(LIBS)
+
+.c.o:
+ @echo [CC] $<
+ @$(CC) -c $(CFLAGS) $< -o $@
+
+clean:
+ rm -f $(OBJ) gpio *~ core tags
+
+tags: $(SRC)
+ @echo [ctags]
+ @ctags $(SRC)
+
+depend:
+ makedepend -Y $(SRC)
+
+install:
+ cp gpio /usr/local/bin
+ chown root.root /usr/local/bin/gpio
+ chmod 4755 /usr/local/bin/gpio
+ mkdir -p /usr/local/man/man1
+ cp gpio.1 /usr/local/man/man1
+
+uninstall:
+ rm -f /usr/local/bin/gpio
+ rm -f /usr/local/man/man1/gpio.1
+
+# DO NOT DELETE
--- /dev/null
+.TH "GPIO" "14 June 2012" "Command-Line access to Raspberry Pi and PiFace GPIO"
+
+.SH NAME
+gpio \- Command-line access to Raspberry Pi and PiFace GPIO
+
+.SH SYNOPSIS
+.TP
+.B gpio
+.RB [ \-v ]
+.TP
+.B gpio
+.RB [ \-g ]
+.RB < read/write/pwm/mode ...>
+.TP
+.B gpio
+.RB [ \-p ]
+.RB < read/write/mode ...>
+.TP
+.B gpio
+.RB < export/edge/unexport/unexportall/exports ...>
+
+.SH DESCRIPTION
+
+.B GPIO
+is a command line tool to allow the user easy access to the GPIO pins
+on the Raspberry Pi. It's designed for simple testing and diagnostic
+purposes, but can be used in shell scripts for general if somewhat slow
+control of the GPIO pins.
+
+Additionally, it can be used to set the exports in the \fI/sys/class/gpio\fR
+system directory to allow subsequent programs to use the \fR/sys/class/gpio\fR
+interface without needing to be run as root.
+
+.SH OPTIONS
+
+.TP
+.B \-v
+Output the current version
+
+.TP
+.B \-g
+Use the BCM_GPIO pins numbers rather than wiringPi pin numbers.
+
+.TP
+.B \-p
+Use the PiFace interface board and its corresponding pin numbers.
+
+.TP
+.B read
+Read the digital value of the given pin and print 0 or 1 to represent the
+respective logic levels.
+
+.TP
+.B write
+Write the given value (0 or 1) to the pin.
+
+.TP
+.B pwm
+Write a PWM value (0-1023) to the given pin.
+
+.TP
+.B mode
+Set a pin into \fIinput\fR, \fIoutput\fR or \fIpwm\fR mode. Can also
+use the literals \fIup\fR, \fIdown\fR or \fItri\fR to set the internal
+pull-up, pull-down or tristate (off) controls.
+
+.TP
+.B export
+Export a GPIO pin in the \fI/sys/class/gpio\fR directory. Use like the
+mode command above however only \fIin\fR and \fIout\fR are supported at
+this time. Note that the pin number is the \fBBCM_GPIO\fR number and
+not the wiringPi number.
+
+Once a GPIO pin has been exported, the \fBgpio\fR program changes the
+ownership of the \fI/sys/class/gpio/gpioX/value\fR and if present in
+later kernels, the \fI/sys/class/gpio/gpioX/edge\fR pseudo files to
+that of the user running the \fBgpio\fR program. This means that you
+can have a small script of gpio exports to setup the gpio pins as your
+program requires without the need to run anything as root, or with the
+sudo command.
+
+.TP
+.B edge
+This exports a GPIO pin in the \fI/sys/class/gpio\fR directory, set
+the direction to input and set the edge interrupt method to \fInone\fR,
+\fIrising\fR, \fIfalling\fR or \fIboth\fR. Use like the export command
+above and note that \fBBCM_GPIO\fR pin number is used not not wiringPi pin
+numbering.
+
+Like the export commands abovem ownership is set to that of the
+calling user, allowing subsequent access from user programs without
+requiring root/sudo.
+
+.TP
+.B unexport
+Un-Export a GPIO pin in the /sys/class/gpio directory.
+
+.TP
+.B unexportall
+Un-Export all the GPIO pins in the /sys/class/gpio directory.
+
+.TP
+.B exports
+Print a list (if any) of all the exported GPIO pins and their current values.
+
+.SH "WiringPi vs. GPIO Pin numbering"
+
+.PP
+.TS
+r r l.
+WiringPi GPIO Function
+_
+0 17
+1 18 (PWM)
+2 21
+3 22
+4 23
+5 24
+6 25
+7 4
+8 0 SDA0
+9 1 SCL0
+10 8 SPI CE0
+11 7 SPI CE1
+12 10 SPI MOSI
+13 9 SPI MISO
+14 11 SPI SCLK
+15 14 TxD
+16 15 RxD
+.TE
+
+.SH FILES
+
+.TP 2.2i
+.I gpio
+executable
+
+.SH EXAMPLES
+.TP 2.2i
+gpio mode 4 output # Set pin 4 to output
+.PP
+gpio -g mode 23 output # Set GPIO pin 23 to output (same as WiringPi pin 4)
+.PP
+gpio mode 1 pwm # Set pin 1 to PWM mode
+.PP
+gpio pwm 1 512 # Set pin 1 to PWM value 512 - half brightness
+.PP
+gpio export 17 out # Set GPIO Pin 17 to output
+.PP
+gpio export 0 in # Set GPIO Pin 0 (SDA0) to input.
+.PP
+gpio -g read 0 # Read GPIO Pin 0 (SDA0)
+
+.SH "NOTES"
+
+When using the \fIexport\fR, \fIedge\fR or \fIunexport\fR commands, the
+pin numbers are \fBalways\fR native BCM_GPIO numbers and never wiringPi
+pin numbers.
+
+.SH "SEE ALSO"
+
+.LP
+WiringPi's home page
+.IP
+https://projects.drogon.net/raspberry-pi/wiringpi/
+
+.SH AUTHOR
+
+Gordon Henderson
+
+.SH "REPORTING BUGS"
+
+Report bugs to <gordon@drogon.net>
+
+.SH COPYRIGHT
+
+Copyright (c) 2012 Gordon Henderson
+This is free software; see the source for copying conditions. There is NO
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
--- /dev/null
+/*
+ * gpio.c:
+ * Set-UID command-line interface to the Raspberry Pi's GPIO
+ * Copyright (c) 2012 Gordon Henderson
+ ***********************************************************************
+ * This file is part of wiringPi:
+ * https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ * wiringPi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * wiringPi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+#include <wiringPi.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <fcntl.h>
+
+#ifndef TRUE
+# define TRUE (1==1)
+# define FALSE (1==2)
+#endif
+
+#define VERSION "1.1"
+
+static int wpMode ;
+
+char *usage = "Usage: gpio -v\n"
+ " gpio [-g] <read/write/pwm/mode> ...\n"
+ " gpio [-p] <read/write/mode> ...\n"
+ " gpio export/edge/unexport/unexportall/exports ...\n"
+ " gpio drive <group> <value>\n"
+ " gpio load spi/i2c" ;
+
+
+
+/*
+ * changeOwner:
+ * Change the ownership of the file to the real userId of the calling
+ * program so we can access it.
+ *********************************************************************************
+ */
+
+static void changeOwner (char *cmd, char *file)
+{
+ uid_t uid = getuid () ;
+ uid_t gid = getgid () ;
+
+ if (chown (file, uid, gid) != 0)
+ {
+ if (errno == ENOENT) // Warn that it's not there
+ fprintf (stderr, "%s: Warning: File not present: %s\n", cmd, file) ;
+ else
+ {
+ fprintf (stderr, "%s: Unable to change ownership of %s: %s\n", cmd, file, strerror (errno)) ;
+ exit (1) ;
+ }
+ }
+}
+
+
+/*
+ * moduleLoaded:
+ * Return true/false if the supplied module is loaded
+ *********************************************************************************
+ */
+
+static int moduleLoaded (char *modName)
+{
+ int len = strlen (modName) ;
+ int found = FALSE ;
+ FILE *fd = fopen ("/proc/modules", "r") ;
+ char line [80] ;
+
+ if (fd == NULL)
+ {
+ fprintf (stderr, "gpio: Unable to check modules: %s\n", strerror (errno)) ;
+ exit (1) ;
+ }
+
+ while (fgets (line, 80, fd) != NULL)
+ {
+ if (strncmp (line, modName, len) != 0)
+ continue ;
+
+ found = TRUE ;
+ break ;
+ }
+
+ fclose (fd) ;
+
+ return found ;
+}
+
+
+/*
+ * doLoad:
+ * Load either the spi or i2c modules and change device ownerships, etc.
+ *********************************************************************************
+ */
+
+static void _doLoadUsage (char *argv [])
+{
+ fprintf (stderr, "Usage: %s load <spi/i2c>\n", argv [0]) ;
+ exit (1) ;
+}
+
+static void doLoad (int argc, char *argv [])
+{
+ char *module ;
+ char cmd [80] ;
+ char *file1, *file2 ;
+
+ if (argc != 3)
+ _doLoadUsage (argv) ;
+
+ /**/ if (strcasecmp (argv [2], "spi") == 0)
+ {
+ module = "spi_bcm2708" ;
+ file1 = "/dev/spidev0.0" ;
+ file2 = "/dev/spidev0.1" ;
+ }
+ else if (strcasecmp (argv [2], "i2c") == 0)
+ {
+ module = "i2c_bcm2708" ;
+ file1 = "/dev/i2c-0" ;
+ file2 = "/dev/i2c-1" ;
+ }
+ else
+ _doLoadUsage (argv) ;
+
+ if (!moduleLoaded (module))
+ {
+ sprintf (cmd, "modprobe %s", module) ;
+ system (cmd) ;
+ }
+
+ if (!moduleLoaded (module))
+ {
+ fprintf (stderr, "%s: Unable to load %s\n", argv [0], module) ;
+ exit (1) ;
+ }
+
+ sleep (1) ; // To let things get settled
+
+ changeOwner (argv [0], file1) ;
+ changeOwner (argv [0], file2) ;
+}
+
+
+
+/*
+ * doExports:
+ * List all GPIO exports
+ *********************************************************************************
+ */
+
+void doExports (void)
+{
+ int fd ;
+ int i, l, first ;
+ char fName [128] ;
+ char buf [16] ;
+
+// Rather crude, but who knows what others are up to...
+
+ for (first = 0, i = 0 ; i < 64 ; ++i)
+ {
+
+// Try to read the direction
+
+ sprintf (fName, "/sys/class/gpio/gpio%d/direction", i) ;
+ if ((fd = open (fName, O_RDONLY)) == -1)
+ continue ;
+
+ if (first == 0)
+ {
+ ++first ;
+ printf ("GPIO Pins exported:\n") ;
+ }
+
+ printf ("%4d: ", i) ;
+
+ if ((l = read (fd, buf, 16)) == 0)
+ sprintf (buf, "%s", "?") ;
+
+ buf [l] = 0 ;
+ if ((buf [strlen (buf) - 1]) == '\n')
+ buf [strlen (buf) - 1] = 0 ;
+
+ printf ("%-3s", buf) ;
+
+ close (fd) ;
+
+// Try to Read the value
+
+ sprintf (fName, "/sys/class/gpio/gpio%d/value", i) ;
+ if ((fd = open (fName, O_RDONLY)) == -1)
+ {
+ printf ("No Value file (huh?)\n") ;
+ continue ;
+ }
+
+ if ((l = read (fd, buf, 16)) == 0)
+ sprintf (buf, "%s", "?") ;
+
+ buf [l] = 0 ;
+ if ((buf [strlen (buf) - 1]) == '\n')
+ buf [strlen (buf) - 1] = 0 ;
+
+ printf (" %s", buf) ;
+
+// Read any edge trigger file
+
+ sprintf (fName, "/sys/class/gpio/gpio%d/edge", i) ;
+ if ((fd = open (fName, O_RDONLY)) == -1)
+ {
+ printf ("\n") ;
+ continue ;
+ }
+
+ if ((l = read (fd, buf, 16)) == 0)
+ sprintf (buf, "%s", "?") ;
+
+ buf [l] = 0 ;
+ if ((buf [strlen (buf) - 1]) == '\n')
+ buf [strlen (buf) - 1] = 0 ;
+
+ printf (" %-8s\n", buf) ;
+
+ close (fd) ;
+ }
+}
+
+
+/*
+ * doExport:
+ * gpio export pin mode
+ * This uses the /sys/class/gpio device interface.
+ *********************************************************************************
+ */
+
+void doExport (int argc, char *argv [])
+{
+ FILE *fd ;
+ int pin ;
+ char *mode ;
+ char fName [128] ;
+
+ if (argc != 4)
+ {
+ fprintf (stderr, "Usage: %s export pin mode\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ pin = atoi (argv [2]) ;
+
+ mode = argv [3] ;
+
+ if ((fd = fopen ("/sys/class/gpio/export", "w")) == NULL)
+ {
+ fprintf (stderr, "%s: Unable to open GPIO export interface: %s\n", argv [0], strerror (errno)) ;
+ exit (1) ;
+ }
+
+ fprintf (fd, "%d\n", pin) ;
+ fclose (fd) ;
+
+ sprintf (fName, "/sys/class/gpio/gpio%d/direction", pin) ;
+ if ((fd = fopen (fName, "w")) == NULL)
+ {
+ fprintf (stderr, "%s: Unable to open GPIO direction interface for pin %d: %s\n", argv [0], pin, strerror (errno)) ;
+ exit (1) ;
+ }
+
+ /**/ if ((strcasecmp (mode, "in") == 0) || (strcasecmp (mode, "input") == 0))
+ fprintf (fd, "in\n") ;
+ else if ((strcasecmp (mode, "out") == 0) || (strcasecmp (mode, "output") == 0))
+ fprintf (fd, "out\n") ;
+ else
+ {
+ fprintf (stderr, "%s: Invalid mode: %s. Should be in or out\n", argv [1], mode) ;
+ exit (1) ;
+ }
+
+ fclose (fd) ;
+
+// Change ownership so the current user can actually use it!
+
+ sprintf (fName, "/sys/class/gpio/gpio%d/value", pin) ;
+ changeOwner (argv [0], fName) ;
+
+ sprintf (fName, "/sys/class/gpio/gpio%d/edge", pin) ;
+ changeOwner (argv [0], fName) ;
+
+}
+
+
+/*
+ * doEdge:
+ * gpio edge pin mode
+ * Easy access to changing the edge trigger on a GPIO pin
+ * This uses the /sys/class/gpio device interface.
+ *********************************************************************************
+ */
+
+void doEdge (int argc, char *argv [])
+{
+ FILE *fd ;
+ int pin ;
+ char *mode ;
+ char fName [128] ;
+ uid_t uid ;
+ gid_t gid ;
+
+ if (argc != 4)
+ {
+ fprintf (stderr, "Usage: %s edge pin mode\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ pin = atoi (argv [2]) ;
+
+ mode = argv [3] ;
+
+// Export the pin and set direction to input
+
+ if ((fd = fopen ("/sys/class/gpio/export", "w")) == NULL)
+ {
+ fprintf (stderr, "%s: Unable to open GPIO export interface: %s\n", argv [0], strerror (errno)) ;
+ exit (1) ;
+ }
+
+ fprintf (fd, "%d\n", pin) ;
+ fclose (fd) ;
+
+ sprintf (fName, "/sys/class/gpio/gpio%d/direction", pin) ;
+ if ((fd = fopen (fName, "w")) == NULL)
+ {
+ fprintf (stderr, "%s: Unable to open GPIO direction interface for pin %d: %s\n", argv [0], pin, strerror (errno)) ;
+ exit (1) ;
+ }
+
+ fprintf (fd, "in\n") ;
+ fclose (fd) ;
+
+ sprintf (fName, "/sys/class/gpio/gpio%d/edge", pin) ;
+ if ((fd = fopen (fName, "w")) == NULL)
+ {
+ fprintf (stderr, "%s: Unable to open GPIO edge interface for pin %d: %s\n", argv [0], pin, strerror (errno)) ;
+ exit (1) ;
+ }
+
+ /**/ if (strcasecmp (mode, "none") == 0)
+ fprintf (fd, "none\n") ;
+ else if (strcasecmp (mode, "rising") == 0)
+ fprintf (fd, "rising\n") ;
+ else if (strcasecmp (mode, "falling") == 0)
+ fprintf (fd, "falling\n") ;
+ else if (strcasecmp (mode, "both") == 0)
+ fprintf (fd, "both\n") ;
+ else
+ {
+ fprintf (stderr, "%s: Invalid mode: %s. Should be none, rising, falling or both\n", argv [1], mode) ;
+ exit (1) ;
+ }
+
+// Change ownership so the current user can actually use it!
+
+ uid = getuid () ;
+ gid = getgid () ;
+
+ sprintf (fName, "/sys/class/gpio/gpio%d/value", pin) ;
+ if (chown (fName, uid, gid) != 0)
+ {
+ fprintf (stderr, "%s: Unable to change ownership of the value file: %s\n", argv [1], strerror (errno)) ;
+ exit (1) ;
+ }
+
+// Also change ownership of the edge file
+
+ sprintf (fName, "/sys/class/gpio/gpio%d/edge", pin) ;
+ if (chown (fName, uid, gid) != 0)
+ {
+ fprintf (stderr, "%s: Unable to change ownership of the value file: %s\n", argv [1], strerror (errno)) ;
+ exit (1) ;
+ }
+
+ fclose (fd) ;
+}
+
+
+/*
+ * doUnexport:
+ * gpio unexport pin
+ * This uses the /sys/class/gpio device interface.
+ *********************************************************************************
+ */
+
+void doUnexport (int argc, char *argv [])
+{
+ FILE *fd ;
+ int pin ;
+
+ if (argc != 3)
+ {
+ fprintf (stderr, "Usage: %s unexport pin\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ pin = atoi (argv [2]) ;
+
+ if ((fd = fopen ("/sys/class/gpio/unexport", "w")) == NULL)
+ {
+ fprintf (stderr, "%s: Unable to open GPIO export interface\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ fprintf (fd, "%d\n", pin) ;
+ fclose (fd) ;
+}
+
+
+/*
+ * doUnexportAll:
+ * gpio unexportall
+ * Un-Export all the GPIO pins.
+ * This uses the /sys/class/gpio device interface.
+ *********************************************************************************
+ */
+
+void doUnexportall (int argc, char *argv [])
+{
+ FILE *fd ;
+ int pin ;
+
+ for (pin = 0 ; pin < 63 ; ++pin)
+ {
+ if ((fd = fopen ("/sys/class/gpio/unexport", "w")) == NULL)
+ {
+ fprintf (stderr, "%s: Unable to open GPIO export interface\n", argv [0]) ;
+ exit (1) ;
+ }
+ fprintf (fd, "%d\n", pin) ;
+ fclose (fd) ;
+ }
+}
+
+
+/*
+ * doMode:
+ * gpio mode pin mode ...
+ *********************************************************************************
+ */
+
+void doMode (int argc, char *argv [])
+{
+ int pin ;
+ char *mode ;
+
+ if (argc != 4)
+ {
+ fprintf (stderr, "Usage: %s mode pin mode\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ pin = atoi (argv [2]) ;
+
+ if ((wpMode == WPI_MODE_PINS) && ((pin < 0) || (pin >= NUM_PINS)))
+ return ;
+
+ mode = argv [3] ;
+
+ /**/ if (strcasecmp (mode, "in") == 0)
+ pinMode (pin, INPUT) ;
+ else if (strcasecmp (mode, "out") == 0)
+ pinMode (pin, OUTPUT) ;
+ else if (strcasecmp (mode, "pwm") == 0)
+ pinMode (pin, PWM_OUTPUT) ;
+ else if (strcasecmp (mode, "up") == 0)
+ pullUpDnControl (pin, PUD_UP) ;
+ else if (strcasecmp (mode, "down") == 0)
+ pullUpDnControl (pin, PUD_DOWN) ;
+ else if (strcasecmp (mode, "tri") == 0)
+ pullUpDnControl (pin, PUD_OFF) ;
+ else
+ {
+ fprintf (stderr, "%s: Invalid mode: %s. Should be in/out/pwm/up/down/tri\n", argv [1], mode) ;
+ exit (1) ;
+ }
+}
+
+
+/*
+ * doPadDrive:
+ * gpio drive group value
+ *********************************************************************************
+ */
+
+void doPadDrive (int argc, char *argv [])
+{
+ int group, val ;
+
+ if (argc != 4)
+ {
+ fprintf (stderr, "Usage: %s drive group value\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ group = atoi (argv [2]) ;
+ val = atoi (argv [3]) ;
+
+ if ((group < 0) || (group > 2))
+ {
+ fprintf (stderr, "%s: drive group not 0, 1 or 2: %d\n", argv [0], group) ;
+ exit (1) ;
+ }
+
+ if ((val < 0) || (val > 7))
+ {
+ fprintf (stderr, "%s: drive value not 0-7: %d\n", argv [0], val) ;
+ exit (1) ;
+ }
+
+ setPadDrive (group, val) ;
+}
+
+
+/*
+ * doWrite:
+ * gpio write pin value
+ *********************************************************************************
+ */
+
+void doWrite (int argc, char *argv [])
+{
+ int pin, val ;
+
+ if (argc != 4)
+ {
+ fprintf (stderr, "Usage: %s write pin value\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ pin = atoi (argv [2]) ;
+
+ if ((wpMode == WPI_MODE_PINS) && ((pin < 0) || (pin >= NUM_PINS)))
+ return ;
+
+ val = atoi (argv [3]) ;
+
+ /**/ if (val == 0)
+ digitalWrite (pin, LOW) ;
+ else
+ digitalWrite (pin, HIGH) ;
+}
+
+
+/*
+ * doRead:
+ * Read a pin and return the value
+ *********************************************************************************
+ */
+
+void doRead (int argc, char *argv [])
+{
+ int pin, val ;
+
+ if (argc != 3)
+ {
+ fprintf (stderr, "Usage: %s read pin\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ pin = atoi (argv [2]) ;
+
+ if ((wpMode == WPI_MODE_PINS) && ((pin < 0) || (pin >= NUM_PINS)))
+ {
+ printf ("0\n") ;
+ return ;
+ }
+
+ val = digitalRead (pin) ;
+
+ printf ("%s\n", val == 0 ? "0" : "1") ;
+}
+
+
+/*
+ * doPwm:
+ * Output a PWM value on a pin
+ *********************************************************************************
+ */
+
+void doPwm (int argc, char *argv [])
+{
+ int pin, val ;
+
+ if (argc != 4)
+ {
+ fprintf (stderr, "Usage: %s pwm <pin> <value>\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ pin = atoi (argv [2]) ;
+
+ if ((wpMode == WPI_MODE_PINS) && ((pin < 0) || (pin >= NUM_PINS)))
+ return ;
+
+ val = atoi (argv [3]) ;
+
+ pwmWrite (pin, val) ;
+}
+
+
+/*
+ * main:
+ * Start here
+ *********************************************************************************
+ */
+
+int main (int argc, char *argv [])
+{
+ int i ;
+
+ if (argc == 1)
+ {
+ fprintf (stderr, "%s: %s\n", argv [0], usage) ;
+ return 1 ;
+ }
+
+ if (strcasecmp (argv [1], "-v") == 0)
+ {
+ printf ("gpio version: %s\n", VERSION) ;
+ printf ("Copyright (c) 2012 Gordon Henderson\n") ;
+ printf ("This is free software with ABSOLUTELY NO WARRANTY.\n") ;
+ printf ("For details type: %s -warranty\n", argv [0]) ;
+ return 0 ;
+ }
+
+ if (strcasecmp (argv [1], "-warranty") == 0)
+ {
+ printf ("gpio version: %s\n", VERSION) ;
+ printf ("Copyright (c) 2012 Gordon Henderson\n") ;
+ printf ("\n") ;
+ printf (" This program is free software; you can redistribute it and/or modify\n") ;
+ printf (" it under the terms of the GNU Leser General Public License as published\n") ;
+ printf (" by the Free Software Foundation, either version 3 of the License, or\n") ;
+ printf (" (at your option) any later version.\n") ;
+ printf ("\n") ;
+ printf (" This program is distributed in the hope that it will be useful,\n") ;
+ printf (" but WITHOUT ANY WARRANTY; without even the implied warranty of\n") ;
+ printf (" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n") ;
+ printf (" GNU Lesser General Public License for more details.\n") ;
+ printf ("\n") ;
+ printf (" You should have received a copy of the GNU Lesser General Public License\n") ;
+ printf (" along with this program. If not, see <http://www.gnu.org/licenses/>.\n") ;
+ printf ("\n") ;
+ return 0 ;
+ }
+
+ if (geteuid () != 0)
+ {
+ fprintf (stderr, "%s: Must be root to run. Program should be suid root. This is an error.\n", argv [0]) ;
+ return 1 ;
+ }
+
+// Initial test for /sys/class/gpio operations:
+
+ /**/ if (strcasecmp (argv [1], "exports" ) == 0) { doExports () ; return 0 ; }
+ else if (strcasecmp (argv [1], "export" ) == 0) { doExport (argc, argv) ; return 0 ; }
+ else if (strcasecmp (argv [1], "edge" ) == 0) { doEdge (argc, argv) ; return 0 ; }
+ else if (strcasecmp (argv [1], "unexportall") == 0) { doUnexportall (argc, argv) ; return 0 ; }
+ else if (strcasecmp (argv [1], "unexport" ) == 0) { doUnexport (argc, argv) ; return 0 ; }
+ else if (strcasecmp (argv [1], "load" ) == 0) { doLoad (argc, argv) ; return 0 ; }
+
+// Check for -g argument
+
+ if (strcasecmp (argv [1], "-g") == 0)
+ {
+ if (wiringPiSetupGpio () == -1)
+ {
+ fprintf (stderr, "%s: Unable to initialise GPIO in GPIO mode.\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ for (i = 2 ; i < argc ; ++i)
+ argv [i - 1] = argv [i] ;
+ --argc ;
+ wpMode = WPI_MODE_GPIO ;
+ }
+
+// Check for -p argument for PiFace
+
+ else if (strcasecmp (argv [1], "-p") == 0)
+ {
+ if (wiringPiSetupPiFaceForGpioProg () == -1)
+ {
+ fprintf (stderr, "%s: Unable to initialise PiFace.\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ for (i = 2 ; i < argc ; ++i)
+ argv [i - 1] = argv [i] ;
+ --argc ;
+ wpMode = WPI_MODE_PIFACE ;
+ }
+
+// Default to wiringPi mode
+
+ else
+ {
+ if (wiringPiSetup () == -1)
+ {
+ fprintf (stderr, "%s: Unable to initialise GPIO in wiringPi mode\n", argv [0]) ;
+ exit (1) ;
+ }
+ wpMode = WPI_MODE_PINS ;
+ }
+
+// Check for wiring commands
+
+ /**/ if (strcasecmp (argv [1], "write" ) == 0)
+ doWrite (argc, argv) ;
+ else if (strcasecmp (argv [1], "read" ) == 0)
+ doRead (argc, argv) ;
+ else if (strcasecmp (argv [1], "mode" ) == 0)
+ doMode (argc, argv) ;
+ else if (strcasecmp (argv [1], "pwm" ) == 0)
+ doPwm (argc, argv) ;
+ else if (strcasecmp (argv [1], "drive" ) == 0)
+ doPadDrive (argc, argv) ;
+ else
+ {
+ fprintf (stderr, "%s: Unknown command: %s. (read/write/pwm/mode/drive expected)\n", argv [0], argv [1]) ;
+ exit (1) ;
+ }
+ return 0 ;
+}
--- /dev/null
+#!/bin/bash
+
+# Simple test - assumes LEDs on Pins 0-7.
+
+for i in `seq 0 7`;
+do
+ gpio mode $i out
+done
+
+while true;
+do
+ for i in `seq 0 7`;
+ do
+ gpio write $i 1
+ sleep 0.1
+ done
+
+ for i in `seq 0 7`;
+ do
+ gpio write $i 0
+ sleep 0.1
+ done
+done
--- /dev/null
+ GNU LESSER GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+ This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+ 0. Additional Definitions.
+
+ As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+ "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+ An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+ A "Combined Work" is a work produced by combining or linking an
+Application with the Library. The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+ The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+ The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+ 1. Exception to Section 3 of the GNU GPL.
+
+ You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+ 2. Conveying Modified Versions.
+
+ If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+ a) under this License, provided that you make a good faith effort to
+ ensure that, in the event an Application does not supply the
+ function or data, the facility still operates, and performs
+ whatever part of its purpose remains meaningful, or
+
+ b) under the GNU GPL, with none of the additional permissions of
+ this License applicable to that copy.
+
+ 3. Object Code Incorporating Material from Library Header Files.
+
+ The object code form of an Application may incorporate material from
+a header file that is part of the Library. You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+ a) Give prominent notice with each copy of the object code that the
+ Library is used in it and that the Library and its use are
+ covered by this License.
+
+ b) Accompany the object code with a copy of the GNU GPL and this license
+ document.
+
+ 4. Combined Works.
+
+ You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+ a) Give prominent notice with each copy of the Combined Work that
+ the Library is used in it and that the Library and its use are
+ covered by this License.
+
+ b) Accompany the Combined Work with a copy of the GNU GPL and this license
+ document.
+
+ c) For a Combined Work that displays copyright notices during
+ execution, include the copyright notice for the Library among
+ these notices, as well as a reference directing the user to the
+ copies of the GNU GPL and this license document.
+
+ d) Do one of the following:
+
+ 0) Convey the Minimal Corresponding Source under the terms of this
+ License, and the Corresponding Application Code in a form
+ suitable for, and under terms that permit, the user to
+ recombine or relink the Application with a modified version of
+ the Linked Version to produce a modified Combined Work, in the
+ manner specified by section 6 of the GNU GPL for conveying
+ Corresponding Source.
+
+ 1) Use a suitable shared library mechanism for linking with the
+ Library. A suitable mechanism is one that (a) uses at run time
+ a copy of the Library already present on the user's computer
+ system, and (b) will operate properly with a modified version
+ of the Library that is interface-compatible with the Linked
+ Version.
+
+ e) Provide Installation Information, but only if you would otherwise
+ be required to provide such information under section 6 of the
+ GNU GPL, and only to the extent that such information is
+ necessary to install and execute a modified version of the
+ Combined Work produced by recombining or relinking the
+ Application with a modified version of the Linked Version. (If
+ you use option 4d0, the Installation Information must accompany
+ the Minimal Corresponding Source and Corresponding Application
+ Code. If you use option 4d1, you must provide the Installation
+ Information in the manner specified by section 6 of the GNU GPL
+ for conveying Corresponding Source.)
+
+ 5. Combined Libraries.
+
+ You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+ a) Accompany the combined library with a copy of the same work based
+ on the Library, uncombined with any other library facilities,
+ conveyed under the terms of this License.
+
+ b) Give prominent notice with the combined library that part of it
+ is a work based on the Library, and explaining where to find the
+ accompanying uncombined form of the same work.
+
+ 6. Revised Versions of the GNU Lesser General Public License.
+
+ The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+ If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.
--- /dev/null
+#
+# Makefile:
+# wiringPi - Wiring Compatable library for the Raspberry Pi
+#
+# Copyright (c) 2012 Gordon Henderson
+#################################################################################
+# This file is part of wiringPi:
+# https://projects.drogon.net/raspberry-pi/wiringpi/
+#
+# wiringPi is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# wiringPi is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
+#################################################################################
+
+
+TARGET=libwiringPi.a
+
+#DEBUG = -g -O0
+DEBUG = -O3
+CC = gcc
+INCLUDE = -I.
+CFLAGS = $(DEBUG) -Wall $(INCLUDE) -Winline -pipe
+
+LIBS =
+
+# Should not alter anything below this line
+###############################################################################
+
+SRC = wiringPi.c wiringPiFace.c wiringSerial.c wiringShift.c \
+ gertboard.c \
+ piNes.c \
+ lcd.c piHiPri.c piThread.c
+
+OBJ = wiringPi.o wiringPiFace.o wiringSerial.o wiringShift.o \
+ gertboard.o \
+ piNes.o \
+ lcd.o piHiPri.o piThread.o
+
+all: $(TARGET)
+
+$(TARGET): $(OBJ)
+ @echo [AR] $(OBJ)
+ @ar rcs $(TARGET) $(OBJ)
+ @ranlib $(TARGET)
+ @size $(TARGET)
+
+.c.o:
+ @echo [CC] $<
+ @$(CC) -c $(CFLAGS) $< -o $@
+
+clean:
+ rm -f $(OBJ) $(TARGET) *~ core tags Makefile.bak
+
+tags: $(SRC)
+ @echo [ctags]
+ @ctags $(SRC)
+
+depend:
+ makedepend -Y $(SRC)
+
+install: $(TARGET)
+ @echo [install]
+ install -m 0755 -d /usr/local/lib
+ install -m 0755 -d /usr/local/include
+ install -m 0644 wiringPi.h /usr/local/include
+ install -m 0644 wiringSerial.h /usr/local/include
+ install -m 0644 wiringShift.h /usr/local/include
+ install -m 0644 gertboard.h /usr/local/include
+ install -m 0644 piNes.h /usr/local/include
+ install -m 0644 lcd.h /usr/local/include
+ install -m 0644 libwiringPi.a /usr/local/lib
+
+uninstall:
+ @echo [uninstall]
+ rm -f /usr/local/include/lcd.h
+ rm -f /usr/local/include/wiringShift.h
+ rm -f /usr/local/include/wiringPi.h
+ rm -f /usr/local/lib/libwiringPi.a
+
+
+
+# DO NOT DELETE
+
+wiringPi.o: wiringPi.h
+wiringPiFace.o: wiringPi.h
+wiringSerial.o: wiringSerial.h
+wiringShift.o: wiringPi.h wiringShift.h
+gertboard.o: gertboard.h
+piNes.o: wiringPi.h piNes.h
+lcd.o: wiringPi.h lcd.h
+piHiPri.o: wiringPi.h
+piThread.o: wiringPi.h
--- /dev/null
+
+WiringPi: An implementation of most of the Arduino Wiring
+ functions for the Raspberry Pi
+
+-- And a lot lot more!
+
+Full details at:
+ https://projects.drogon.net/raspberry-pi/wiringpi/
+
--- /dev/null
+/*
+ * gertboard.c:
+ * Access routines for the SPI devices on the Gertboard
+ * Copyright (c) 2012 Gordon Henderson
+ *
+ * The Gertboard has:
+ *
+ * An MCP3002 dual-channel A to D convertor connected
+ * to the SPI bus, selected by chip-select A, and:
+ *
+ * An MCP4802 dual-channel D to A convertor connected
+ * to the SPI bus, selected via chip-select B.
+ *
+ ***********************************************************************
+ * This file is part of wiringPi:
+ * https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ * wiringPi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * wiringPi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with wiringPi.
+ * If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+
+#include <stdio.h>
+#include <stdint.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <linux/spi/spidev.h>
+
+#include "gertboard.h"
+
+
+// The SPI bus parameters
+// Variables as they need to be passed as pointers later on
+
+static char *spiA2D = "/dev/spidev0.0" ;
+static char *spiD2A = "/dev/spidev0.1" ;
+static uint8_t spiMode = 0 ;
+static uint8_t spiBPW = 8 ;
+static uint32_t spiSpeed = 100000 ; // 1MHz
+static uint16_t spiDelay = 0;
+
+// Locals here to keep track of everything
+
+static int spiFdA2D ;
+static int spiFdD2A ;
+
+
+/*
+ * gertboardAnalogWrite:
+ * Write an 8-bit data value to the MCP4802 Analog to digital
+ * convertor on the Gertboard.
+ *********************************************************************************
+ */
+
+void gertboardAnalogWrite (int chan, int value)
+{
+ uint8_t spiBufTx [2] ;
+ uint8_t spiBufRx [2] ;
+ struct spi_ioc_transfer spi ;
+
+ uint8_t chanBits, dataBits ;
+
+ if (chan == 0)
+ chanBits = 0x30 ;
+ else
+ chanBits = 0xB0 ;
+
+ chanBits |= ((value >> 4) & 0x0F) ;
+ dataBits = ((value << 4) & 0xF0) ;
+
+ spiBufTx [0] = chanBits ;
+ spiBufTx [1] = dataBits ;
+
+ spi.tx_buf = (unsigned long)spiBufTx ;
+ spi.rx_buf = (unsigned long)spiBufRx ;
+ spi.len = 2 ;
+ spi.delay_usecs = spiDelay ;
+ spi.speed_hz = spiSpeed ;
+ spi.bits_per_word = spiBPW ;
+
+ ioctl (spiFdD2A, SPI_IOC_MESSAGE(1), &spi) ;
+}
+
+
+/*
+ * gertboardAnalogRead:
+ * Return the analog value of the given channel (0/1).
+ * The A/D is a 10-bit device
+ *********************************************************************************
+ */
+
+int gertboardAnalogRead (int chan)
+{
+ uint8_t spiBufTx [4] ;
+ uint8_t spiBufRx [4] ;
+ struct spi_ioc_transfer spi ;
+
+ uint8_t chanBits ;
+
+ if (chan == 0)
+ chanBits = 0b0110100 ;
+ else
+ chanBits = 0b0111100 ;
+
+ spiBufTx [0] = chanBits ;
+ spiBufTx [1] = 0 ;
+
+ spi.tx_buf = (unsigned long)spiBufTx ;
+ spi.rx_buf = (unsigned long)spiBufRx ;
+ spi.len = 4 ;
+ spi.delay_usecs = spiDelay ;
+ spi.speed_hz = spiSpeed ;
+ spi.bits_per_word = spiBPW ;
+
+ ioctl (spiFdA2D, SPI_IOC_MESSAGE(1), &spi) ;
+
+ return spiBufRx [0] << 8 | spiBufRx [1] ;
+}
+
+
+/*
+ * setParams:
+ * Output the SPI bus parameters to the given device
+ *********************************************************************************
+ */
+
+static int setParams (int fd)
+{
+ if (ioctl (fd, SPI_IOC_WR_MODE, &spiMode) < 0)
+ return -1 ;
+
+ if (ioctl (fd, SPI_IOC_RD_MODE, &spiMode) < 0)
+ return -1 ;
+
+ if (ioctl (fd, SPI_IOC_WR_BITS_PER_WORD, &spiBPW) < 0)
+ return -1 ;
+
+ if (ioctl (fd, SPI_IOC_RD_BITS_PER_WORD, &spiBPW) < 0)
+ return -1 ;
+
+ if (ioctl (fd, SPI_IOC_WR_MAX_SPEED_HZ, &spiSpeed) < 0)
+ return -1 ;
+
+ if (ioctl (fd, SPI_IOC_RD_MAX_SPEED_HZ, &spiSpeed) < 0)
+ return -1 ;
+
+ return 0 ;
+}
+
+
+/*
+ * gertboardSPISetup:
+ * Initialise the SPI bus, etc.
+ *********************************************************************************
+ */
+
+int gertboardSPISetup (void)
+{
+ if ((spiFdA2D = open (spiA2D, O_RDWR)) < 0)
+ return -1 ;
+
+ if (setParams (spiFdA2D) != 0)
+ return -1 ;
+
+ if ((spiFdD2A = open (spiD2A, O_RDWR)) < 0)
+ return -1 ;
+
+ if (setParams (spiFdD2A) != 0)
+ return -1 ;
+
+ return 0 ;
+}
--- /dev/null
+/*
+ * gertboard.h:
+ * Access routines for the SPI devices on the Gertboard
+ * Copyright (c) 2012 Gordon Henderson
+ *
+ * The Gertboard has an MCP4802 dual-channel D to A convertor
+ * connected to the SPI bus, selected via chip-select B.
+ *
+ ***********************************************************************
+ * This file is part of wiringPi:
+ * https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ * wiringPi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * wiringPi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with wiringPi.
+ * If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern void gertboardAnalogWrite (int chan, int value) ;
+extern int gertboardAnalogRead (int chan) ;
+extern int gertboardSPISetup (void) ;
+
+#ifdef __cplusplus
+}
+#endif
--- /dev/null
+/*
+ * lcd.c:
+ * Text-based LCD driver.
+ * This is designed to drive the parallel interface LCD drivers
+ * based in the Hitachi HD44780U controller and compatables.
+ *
+ * Copyright (c) 2012 Gordon Henderson.
+ ***********************************************************************
+ * This file is part of wiringPi:
+ * https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ * wiringPi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * wiringPi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdarg.h>
+
+#include "wiringPi.h"
+#include "lcd.h"
+
+// Commands
+
+#define LCD_CLEAR 0x01
+#define LCD_HOME 0x02
+#define LCD_ENTRY 0x04
+#define LCD_ON_OFF 0x08
+#define LCD_CDSHIFT 0x10
+#define LCD_FUNC 0x20
+#define LCD_CGRAM 0x40
+#define LCD_DGRAM 0x80
+
+#define LCD_ENTRY_SH 0x01
+#define LCD_ENTRY_ID 0x02
+
+#define LCD_ON_OFF_B 0x01
+#define LCD_ON_OFF_C 0x02
+#define LCD_ON_OFF_D 0x04
+
+#define LCD_FUNC_F 0x04
+#define LCD_FUNC_N 0x08
+#define LCD_FUNC_DL 0x10
+
+#define LCD_CDSHIFT_RL 0x04
+
+struct lcdDataStruct
+{
+ uint8_t bits, rows, cols ;
+ uint8_t rsPin, strbPin ;
+ uint8_t dataPins [8] ;
+} ;
+
+struct lcdDataStruct *lcds [MAX_LCDS] ;
+
+
+/*
+ * strobe:
+ * Toggle the strobe (Really the "E") pin to the device.
+ * According to the docs, data is latched on the falling edge.
+ *********************************************************************************
+ */
+
+static void strobe (struct lcdDataStruct *lcd)
+{
+ digitalWrite (lcd->strbPin, 1) ; delayMicroseconds (1) ;
+ digitalWrite (lcd->strbPin, 0) ; delayMicroseconds (50) ;
+}
+
+
+/*
+ * sentDataCmd:
+ * Send an data or command byte to the display.
+ *********************************************************************************
+ */
+
+static void sendDataCmd (struct lcdDataStruct *lcd, uint8_t data)
+{
+ uint8_t i, d4 ;
+
+ if (lcd->bits == 4)
+ {
+ d4 = (data >> 4) & 0x0F;
+ for (i = 0 ; i < 4 ; ++i)
+ {
+ digitalWrite (lcd->dataPins [i], (d4 & 1)) ;
+ d4 >>= 1 ;
+ }
+ strobe (lcd) ;
+
+ d4 = data & 0x0F ;
+ for (i = 0 ; i < 4 ; ++i)
+ {
+ digitalWrite (lcd->dataPins [i], (d4 & 1)) ;
+ d4 >>= 1 ;
+ }
+ }
+ else
+ {
+ for (i = 0 ; i < 8 ; ++i)
+ {
+ digitalWrite (lcd->dataPins [i], (data & 1)) ;
+ data >>= 1 ;
+ }
+ }
+ strobe (lcd) ;
+}
+
+
+/*
+ * putCommand:
+ * Send a command byte to the display
+ *********************************************************************************
+ */
+
+static void putCommand (struct lcdDataStruct *lcd, uint8_t command)
+{
+ digitalWrite (lcd->rsPin, 0) ;
+ sendDataCmd (lcd, command) ;
+}
+
+static void put4Command (struct lcdDataStruct *lcd, uint8_t command)
+{
+ uint8_t i ;
+
+ digitalWrite (lcd->rsPin, 0) ;
+
+ for (i = 0 ; i < 4 ; ++i)
+ {
+ digitalWrite (lcd->dataPins [i], (command & 1)) ;
+ command >>= 1 ;
+ }
+ strobe (lcd) ;
+}
+
+
+/*
+ *********************************************************************************
+ * User Code below here
+ *********************************************************************************
+ */
+
+/*
+ * lcdHome: lcdClear:
+ * Home the cursor or clear the screen.
+ *********************************************************************************
+ */
+
+void lcdHome (int fd)
+{
+ struct lcdDataStruct *lcd = lcds [fd] ;
+ putCommand (lcd, LCD_HOME) ;
+}
+
+void lcdClear (int fd)
+{
+ struct lcdDataStruct *lcd = lcds [fd] ;
+ putCommand (lcd, LCD_CLEAR) ;
+}
+
+
+/*
+ * lcdPosition:
+ * Update the position of the cursor on the display
+ *********************************************************************************
+ */
+
+
+void lcdPosition (int fd, int x, int y)
+{
+ static uint8_t rowOff [4] = { 0x00, 0x40, 0x14, 0x54 } ;
+ struct lcdDataStruct *lcd = lcds [fd] ;
+
+ putCommand (lcd, x + (LCD_DGRAM | rowOff [y])) ;
+}
+
+
+/*
+ * lcdPutchar:
+ * Send a data byte to be displayed on the display
+ *********************************************************************************
+ */
+
+void lcdPutchar (int fd, uint8_t data)
+{
+ struct lcdDataStruct *lcd = lcds [fd] ;
+
+ digitalWrite (lcd->rsPin, 1) ;
+ sendDataCmd (lcd, data) ;
+}
+
+
+/*
+ * lcdPuts:
+ * Send a string to be displayed on the display
+ *********************************************************************************
+ */
+
+void lcdPuts (int fd, char *string)
+{
+ while (*string)
+ lcdPutchar (fd, *string++) ;
+}
+
+
+/*
+ * lcdPrintf:
+ * Printf to an LCD display
+ *********************************************************************************
+ */
+
+void lcdPrintf (int fd, char *message, ...)
+{
+ va_list argp ;
+ char buffer [1024] ;
+
+ va_start (argp, message) ;
+ vsnprintf (buffer, 1023, message, argp) ;
+ va_end (argp) ;
+
+ lcdPuts (fd, buffer) ;
+}
+
+
+/*
+ * lcdInit:
+ * Take a lot of parameters and initialise the LCD, and return a handle to
+ * that LCD, or -1 if any error.
+ *********************************************************************************
+ */
+
+int lcdInit (int rows, int cols, int bits, int rs, int strb,
+ int d0, int d1, int d2, int d3, int d4, int d5, int d6, int d7)
+{
+ static int initialised = 0 ;
+
+ uint8_t func ;
+ int i ;
+ int lcdFd = -1 ;
+ struct lcdDataStruct *lcd ;
+
+ if (initialised == 0)
+ {
+ initialised = 1 ;
+ for (i = 0 ; i < MAX_LCDS ; ++i)
+ lcds [i] = NULL ;
+ }
+
+// Simple sanity checks
+
+ if (! ((bits == 4) || (bits == 8)))
+ return -1 ;
+
+ if ((rows < 0) || (rows > 20))
+ return -1 ;
+
+ if ((cols < 0) || (cols > 20))
+ return -1 ;
+
+// Create a new LCD:
+
+ for (i = 0 ; i < MAX_LCDS ; ++i)
+ {
+ if (lcds [i] == NULL)
+ {
+ lcdFd = i ;
+ break ;
+ }
+ }
+
+ if (lcdFd == -1)
+ return -1 ;
+
+ lcd = malloc (sizeof (struct lcdDataStruct)) ;
+ if (lcd == NULL)
+ return -1 ;
+
+ lcd->rsPin = rs ;
+ lcd->strbPin = strb ;
+ lcd->bits = 8 ; // For now - we'll set it properly later.
+ lcd->rows = rows ;
+ lcd->cols = cols ;
+
+ lcd->dataPins [0] = d0 ;
+ lcd->dataPins [1] = d1 ;
+ lcd->dataPins [2] = d2 ;
+ lcd->dataPins [3] = d3 ;
+ lcd->dataPins [4] = d4 ;
+ lcd->dataPins [5] = d5 ;
+ lcd->dataPins [6] = d6 ;
+ lcd->dataPins [7] = d7 ;
+
+ lcds [lcdFd] = lcd ;
+
+ digitalWrite (lcd->rsPin, 0) ; pinMode (lcd->rsPin, OUTPUT) ;
+ digitalWrite (lcd->strbPin, 0) ; pinMode (lcd->strbPin, OUTPUT) ;
+
+ for (i = 0 ; i < bits ; ++i)
+ {
+ digitalWrite (lcd->dataPins [i], 0) ;
+ pinMode (lcd->dataPins [i], OUTPUT) ;
+ }
+ delay (35) ; // mS
+
+
+// 4-bit mode?
+// OK. This is a PIG and it's not at all obvious from the documentation I had,
+// so I guess some others have worked through either with better documentation
+// or more trial and error... Anyway here goes:
+//
+// It seems that the controller needs to see the FUNC command at least 3 times
+// consecutively - in 8-bit mode. If you're only using 8-bit mode, then it appears
+// that you can get away with one func-set, however I'd not rely on it...
+//
+// So to set 4-bit mode, you need to send the commands one nibble at a time,
+// the same three times, but send the command to set it into 8-bit mode those
+// three times, then send a final 4th command to set it into 4-bit mode, and only
+// then can you flip the switch for the rest of the library to work in 4-bit
+// mode which sends the commands as 2 x 4-bit values.
+
+ if (bits == 4)
+ {
+ func = LCD_FUNC | LCD_FUNC_DL ; // Set 8-bit mode 3 times
+ put4Command (lcd, func >> 4) ; delay (35) ;
+ put4Command (lcd, func >> 4) ; delay (35) ;
+ put4Command (lcd, func >> 4) ; delay (35) ;
+ func = LCD_FUNC ; // 4th set: 4-bit mode
+ put4Command (lcd, func >> 4) ; delay (35) ;
+ lcd->bits = 4 ;
+ }
+ else
+ {
+ func = LCD_FUNC | LCD_FUNC_DL ;
+ putCommand (lcd, func ) ; delay (35) ;
+ putCommand (lcd, func ) ; delay (35) ;
+ putCommand (lcd, func ) ; delay (35) ;
+ }
+
+ if (lcd->rows > 1)
+ {
+ func |= LCD_FUNC_N ;
+ putCommand (lcd, func) ; delay (35) ;
+ }
+
+// Rest of the initialisation sequence
+
+ putCommand (lcd, LCD_ON_OFF | LCD_ON_OFF_D) ; delay (2) ;
+ putCommand (lcd, LCD_ENTRY | LCD_ENTRY_ID) ; delay (2) ;
+ putCommand (lcd, LCD_CDSHIFT | LCD_CDSHIFT_RL) ; delay (2) ;
+ putCommand (lcd, LCD_CLEAR) ; delay (5) ;
+
+ return lcdFd ;
+}
--- /dev/null
+/*
+ * lcd.h:
+ * Text-based LCD driver.
+ * This is designed to drive the parallel interface LCD drivers
+ * based in the Hitachi HD44780U controller and compatables.
+ *
+ * Copyright (c) 2012 Gordon Henderson.
+ ***********************************************************************
+ * This file is part of wiringPi:
+ * https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ * wiringPi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * wiringPi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+#define MAX_LCDS 8
+
+extern void lcdHome (int fd) ;
+extern void lcdClear (int fd) ;
+extern void lcdPosition (int fd, int x, int y) ;
+extern void lcdPutchar (int fd, uint8_t data) ;
+extern void lcdPuts (int fd, char *string) ;
+extern void lcdPrintf (int fd, char *message, ...) ;
+
+extern int lcdInit (int rows, int cols, int bits, int rs, int strb,
+ int d0, int d1, int d2, int d3, int d4, int d5, int d6, int d7) ;
--- /dev/null
+/*
+ * piHiPri:
+ * Simple way to get your program running at high priority
+ * with realtime schedulling.
+ *
+ * Copyright (c) 2012 Gordon Henderson
+ ***********************************************************************
+ * This file is part of wiringPi:
+ * https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ * wiringPi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * wiringPi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with wiringPi.
+ * If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+#include <sched.h>
+#include <string.h>
+
+#include "wiringPi.h"
+
+
+/*
+ * piHiPri:
+ * Attempt to set a high priority schedulling for the running program
+ *********************************************************************************
+ */
+
+int piHiPri (int pri)
+{
+ struct sched_param sched ;
+
+ memset (&sched, 0, sizeof(sched)) ;
+
+ if (pri > sched_get_priority_max (SCHED_RR))
+ pri = sched_get_priority_max (SCHED_RR) ;
+
+ sched.sched_priority = pri ;
+ return sched_setscheduler (0, SCHED_RR, &sched) ;
+}
--- /dev/null
+/*
+ * piNes.c:
+ * Driver for the NES Joystick controller on the Raspberry Pi
+ * Copyright (c) 2012 Gordon Henderson
+ ***********************************************************************
+ * This file is part of wiringPi:
+ * https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ * wiringPi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * wiringPi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with wiringPi.
+ * If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+#include <wiringPi.h>
+
+#include "piNes.h"
+
+#define MAX_NES_JOYSTICKS 8
+
+#define NES_RIGHT 0x01
+#define NES_LEFT 0x02
+#define NES_DOWN 0x04
+#define NES_UP 0x08
+#define NES_START 0x10
+#define NES_SELECT 0x20
+#define NES_B 0x40
+#define NES_A 0x80
+
+
+// Data to store the pins for each controller
+
+struct nesPinsStruct
+{
+ unsigned int cPin, dPin, lPin ;
+} ;
+
+static struct nesPinsStruct nesPins [MAX_NES_JOYSTICKS] ;
+
+static int joysticks = 0 ;
+
+
+/*
+ * setupNesJoystick:
+ * Create a new NES joystick interface, program the pins, etc.
+ *********************************************************************************
+ */
+
+int setupNesJoystick (int dPin, int cPin, int lPin)
+{
+ if (joysticks == MAX_NES_JOYSTICKS)
+ return -1 ;
+
+ nesPins [joysticks].dPin = dPin ;
+ nesPins [joysticks].cPin = cPin ;
+ nesPins [joysticks].lPin = lPin ;
+
+ digitalWrite (lPin, LOW) ;
+ digitalWrite (cPin, LOW) ;
+
+ pinMode (lPin, OUTPUT) ;
+ pinMode (cPin, OUTPUT) ;
+ pinMode (dPin, INPUT) ;
+
+ return joysticks++ ;
+}
+
+
+/*
+ * readNesJoystick:
+ * Do a single scan of the NES Joystick.
+ *********************************************************************************
+ */
+
+unsigned int readNesJoystick (int joystick)
+{
+ unsigned int value = 0 ;
+ int i ;
+
+ struct nesPinsStruct *pins = &nesPins [joystick] ;
+
+// Toggle Latch - which presents the first bit
+
+ digitalWrite (pins->lPin, HIGH) ;
+ delayMicroseconds (1) ;
+ digitalWrite (pins->lPin, LOW) ;
+ delayMicroseconds (1) ;
+
+// Read first bit
+
+ value = digitalRead (pins->dPin) ;
+
+// Now get the next 7 bits with the clock
+
+ for (i = 0 ; i < 7 ; ++i)
+ {
+ digitalWrite (pins->cPin, HIGH) ;
+ delayMicroseconds (1) ;
+ digitalWrite (pins->cPin, LOW) ;
+ delayMicroseconds (1) ;
+ value = (value << 1) | digitalRead (pins->dPin) ;
+ }
+
+ return ~value ;
+}
--- /dev/null
+/*
+ * piNes.h:
+ * Driver for the NES Joystick controller on the Raspberry Pi
+ * Copyright (c) 2012 Gordon Henderson
+ ***********************************************************************
+ * This file is part of wiringPi:
+ * https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ * wiringPi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * wiringPi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with wiringPi.
+ * If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+#define MAX_NES_JOYSTICKS 8
+
+#define NES_RIGHT 0x01
+#define NES_LEFT 0x02
+#define NES_DOWN 0x04
+#define NES_UP 0x08
+#define NES_START 0x10
+#define NES_SELECT 0x20
+#define NES_B 0x40
+#define NES_A 0x80
+
+extern int setupNesJoystick (int dPin, int cPin, int lPin) ;
+extern unsigned int readNesJoystick (int joystick) ;
--- /dev/null
+/*
+ * piThread.c:
+ * Provide a simplified interface to pthreads
+ *
+ * Copyright (c) 2012 Gordon Henderson
+ ***********************************************************************
+ * This file is part of wiringPi:
+ * https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ * wiringPi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * wiringPi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with wiringPi.
+ * If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+#include <pthread.h>
+#include "wiringPi.h"
+
+static pthread_mutex_t piMutexes [4] ;
+
+
+
+/*
+ * piThreadCreate:
+ * Create and start a thread
+ *********************************************************************************
+ */
+
+int piThreadCreate (void *(*fn)(void *))
+{
+ pthread_t myThread ;
+
+ return pthread_create (&myThread, NULL, fn, NULL) ;
+}
+
+/*
+ * piLock: piUnlock:
+ * Activate/Deactivate a mutex.
+ * We're keeping things simple here and only tracking 4 mutexes which
+ * is more than enough for out entry-level pthread programming
+ *********************************************************************************
+ */
+
+void piLock (int key)
+{
+ pthread_mutex_lock (&piMutexes [key]) ;
+}
+
+void piUnlock (int key)
+{
+ pthread_mutex_unlock (&piMutexes [key]) ;
+}
+
--- /dev/null
+/*
+ * wiringPi:
+ * Arduino compatable (ish) Wiring library for the Raspberry Pi
+ * Copyright (c) 2012 Gordon Henderson
+ *
+ * Thanks to code samples from Gert Jan van Loo and the
+ * BCM2835 ARM Peripherals manual, however it's missing
+ * the clock section /grr/mutter/
+ ***********************************************************************
+ * This file is part of wiringPi:
+ * https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ * wiringPi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * wiringPi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with wiringPi.
+ * If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+// Revisions:
+// 19 Jul 2012:
+// Moved to the LGPL
+// Added an abstraction layer to the main routines to save a tiny
+// bit of run-time and make the clode a little cleaner (if a little
+// larger)
+// Added waitForInterrupt code
+// Added piHiPri code
+//
+// 9 Jul 2012:
+// Added in support to use the /sys/class/gpio interface.
+// 2 Jul 2012:
+// Fixed a few more bugs to do with range-checking when in GPIO mode.
+// 11 Jun 2012:
+// Fixed some typos.
+// Added c++ support for the .h file
+// Added a new function to allow for using my "pin" numbers, or native
+// GPIO pin numbers.
+// Removed my busy-loop delay and replaced it with a call to delayMicroseconds
+//
+// 02 May 2012:
+// Added in the 2 UART pins
+// Change maxPins to numPins to more accurately reflect purpose
+
+// Pad drive current fiddling
+
+#undef DEBUG_PADS
+
+#include <stdio.h>
+#include <stdint.h>
+#include <poll.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <time.h>
+#include <fcntl.h>
+#include <sys/time.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "wiringPi.h"
+
+// Function stubs
+
+void (*pinMode) (int pin, int mode) ;
+void (*pullUpDnControl) (int pin, int pud) ;
+void (*digitalWrite) (int pin, int value) ;
+void (*pwmWrite) (int pin, int value) ;
+void (*setPadDrive) (int group, int value) ;
+int (*digitalRead) (int pin) ;
+int (*waitForInterrupt) (int pin, int mS) ;
+void (*delayMicroseconds) (unsigned int howLong) ;
+
+
+#ifndef TRUE
+#define TRUE (1==1)
+#define FALSE (1==2)
+#endif
+
+// BCM Magic
+
+#define BCM_PASSWORD 0x5A000000
+
+
+// Port function select bits
+
+#define FSEL_INPT 0b000
+#define FSEL_OUTP 0b001
+#define FSEL_ALT0 0b100
+#define FSEL_ALT0 0b100
+#define FSEL_ALT1 0b101
+#define FSEL_ALT2 0b110
+#define FSEL_ALT3 0b111
+#define FSEL_ALT4 0b011
+#define FSEL_ALT5 0b010
+
+// Access from ARM Running Linux
+// Take from Gert/Doms code. Some of this is not in the manual
+// that I can find )-:
+
+#define BCM2708_PERI_BASE 0x20000000
+#define GPIO_PADS (BCM2708_PERI_BASE + 0x100000)
+#define CLOCK_BASE (BCM2708_PERI_BASE + 0x101000)
+#define GPIO_BASE (BCM2708_PERI_BASE + 0x200000)
+#define GPIO_TIMER (BCM2708_PERI_BASE + 0x00B000)
+#define GPIO_PWM (BCM2708_PERI_BASE + 0x20C000)
+
+#define PAGE_SIZE (4*1024)
+#define BLOCK_SIZE (4*1024)
+
+// PWM
+
+#define PWM_CONTROL 0
+#define PWM_STATUS 1
+#define PWM0_RANGE 4
+#define PWM0_DATA 5
+#define PWM1_RANGE 8
+#define PWM1_DATA 9
+
+#define PWMCLK_CNTL 40
+#define PWMCLK_DIV 41
+
+#define PWM1_MS_MODE 0x8000 // Run in MS mode
+#define PWM1_USEFIFO 0x2000 // Data from FIFO
+#define PWM1_REVPOLAR 0x1000 // Reverse polarity
+#define PWM1_OFFSTATE 0x0800 // Ouput Off state
+#define PWM1_REPEATFF 0x0400 // Repeat last value if FIFO empty
+#define PWM1_SERIAL 0x0200 // Run in serial mode
+#define PWM1_ENABLE 0x0100 // Channel Enable
+
+#define PWM0_MS_MODE 0x0080 // Run in MS mode
+#define PWM0_USEFIFO 0x0020 // Data from FIFO
+#define PWM0_REVPOLAR 0x0010 // Reverse polarity
+#define PWM0_OFFSTATE 0x0008 // Ouput Off state
+#define PWM0_REPEATFF 0x0004 // Repeat last value if FIFO empty
+#define PWM0_SERIAL 0x0002 // Run in serial mode
+#define PWM0_ENABLE 0x0001 // Channel Enable
+
+// Timer
+
+#define TIMER_LOAD (0x400 >> 2)
+#define TIMER_VALUE (0x404 >> 2)
+#define TIMER_CONTROL (0x408 >> 2)
+#define TIMER_IRQ_CLR (0x40C >> 2)
+#define TIMER_IRQ_RAW (0x410 >> 2)
+#define TIMER_IRQ_MASK (0x414 >> 2)
+#define TIMER_RELOAD (0x418 >> 2)
+#define TIMER_PRE_DIV (0x41C >> 2)
+#define TIMER_COUNTER (0x420 >> 2)
+
+// Locals to hold pointers to the hardware
+
+static volatile uint32_t *gpio ;
+static volatile uint32_t *pwm ;
+static volatile uint32_t *clk ;
+static volatile uint32_t *pads ;
+static volatile uint32_t *timer ;
+
+static volatile uint32_t *timerIrqRaw ;
+
+// The BCM2835 has 54 GPIO pins.
+// BCM2835 data sheet, Page 90 onwards.
+// There are 6 control registers, each control the functions of a block
+// of 10 pins.
+// Each control register has 10 sets of 3 bits per GPIO pin:
+//
+// 000 = GPIO Pin X is an input
+// 001 = GPIO Pin X is an output
+// 100 = GPIO Pin X takes alternate function 0
+// 101 = GPIO Pin X takes alternate function 1
+// 110 = GPIO Pin X takes alternate function 2
+// 111 = GPIO Pin X takes alternate function 3
+// 011 = GPIO Pin X takes alternate function 4
+// 010 = GPIO Pin X takes alternate function 5
+//
+// So the 3 bits for port X are:
+// X / 10 + ((X % 10) * 3)
+
+// sysFds:
+// Map a file descriptor from the /sys/class/gpio/gpioX/value
+
+static int sysFds [64] ;
+
+// Doing it the Arduino way with lookup tables...
+// Yes, it's probably more innefficient than all the bit-twidling, but it
+// does tend to make it all a bit clearer. At least to me!
+
+// pinToGpio:
+// Take a Wiring pin (0 through X) and re-map it to the BCM_GPIO pin
+
+static int pinToGpio [64] =
+{
+ 17, 18, 21, 22, 23, 24, 25, 4, // From the Original Wiki - GPIO 0 through 7
+ 0, 1, // I2C - SDA0, SCL0
+ 8, 7, // SPI - CE1, CE0
+ 10, 9, 11, // SPI - MOSI, MISO, SCLK
+ 14, 15, // UART - Tx, Rx
+
+// Padding:
+
+ -1, -1, -1,-1,-1,-1,-1, -1, -1, -1, -1, -1, -1, -1, -1, // ... 31
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // ... 47
+ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // ... 63
+} ;
+
+// gpioToGPFSEL:
+// Map a BCM_GPIO pin to it's control port. (GPFSEL 0-5)
+
+static uint8_t gpioToGPFSEL [] =
+{
+ 0,0,0,0,0,0,0,0,0,0,
+ 1,1,1,1,1,1,1,1,1,1,
+ 2,2,2,2,2,2,2,2,2,2,
+ 3,3,3,3,3,3,3,3,3,3,
+ 4,4,4,4,4,4,4,4,4,4,
+ 5,5,5,5,5,5,5,5,5,5,
+} ;
+
+// gpioToShift
+// Define the shift up for the 3 bits per pin in each GPFSEL port
+
+static uint8_t gpioToShift [] =
+{
+ 0,3,6,9,12,15,18,21,24,27,
+ 0,3,6,9,12,15,18,21,24,27,
+ 0,3,6,9,12,15,18,21,24,27,
+ 0,3,6,9,12,15,18,21,24,27,
+ 0,3,6,9,12,15,18,21,24,27,
+} ;
+
+// gpioToGPSET:
+// (Word) offset to the GPIO Set registers for each GPIO pin
+
+static uint8_t gpioToGPSET [] =
+{
+ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+ 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
+} ;
+
+// gpioToGPCLR:
+// (Word) offset to the GPIO Clear registers for each GPIO pin
+
+static uint8_t gpioToGPCLR [] =
+{
+ 10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,
+ 11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,
+} ;
+
+// gpioToGPLEV:
+// (Word) offset to the GPIO Input level registers for each GPIO pin
+
+static uint8_t gpioToGPLEV [] =
+{
+ 13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,
+ 14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,
+} ;
+
+#ifdef notYetReady
+// gpioToEDS
+// (Word) offset to the Event Detect Status
+
+static uint8_t gpioToEDS [] =
+{
+ 16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
+ 17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,
+} ;
+
+// gpioToREN
+// (Word) offset to the Rising edgde ENable register
+
+static uint8_t gpioToREN [] =
+{
+ 19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,19,
+ 20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,
+} ;
+
+// gpioToFEN
+// (Word) offset to the Falling edgde ENable register
+
+static uint8_t gpioToFEN [] =
+{
+ 22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,22,
+ 23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,
+} ;
+#endif
+
+// gpioToPUDCLK
+// (Word) offset to the Pull Up Down Clock regsiter
+
+#define GPPUD 37
+
+static uint8_t gpioToPUDCLK [] =
+{
+ 38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,38,
+ 39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,39,
+} ;
+
+// gpioToPwmALT
+// the ALT value to put a GPIO pin into PWM mode
+
+static uint8_t gpioToPwmALT [] =
+{
+ 0, 0, 0, 0, 0, 0, 0, 0, // 0 -> 7
+ 0, 0, 0, 0, FSEL_ALT0, FSEL_ALT0, 0, 0, // 8 -> 15
+ 0, 0, FSEL_ALT5, FSEL_ALT5, 0, 0, 0, 0, // 16 -> 23
+ 0, 0, 0, 0, 0, 0, 0, 0, // 24 -> 31
+ 0, 0, 0, 0, 0, 0, 0, 0, // 32 -> 39
+ FSEL_ALT0, FSEL_ALT0, 0, 0, 0, FSEL_ALT0, 0, 0, // 40 -> 47
+ 0, 0, 0, 0, 0, 0, 0, 0, // 48 -> 55
+ 0, 0, 0, 0, 0, 0, 0, 0, // 56 -> 63
+} ;
+
+static uint8_t gpioToPwmPort [] =
+{
+ 0, 0, 0, 0, 0, 0, 0, 0, // 0 -> 7
+ 0, 0, 0, 0, PWM0_DATA, PWM1_DATA, 0, 0, // 8 -> 15
+ 0, 0, PWM0_DATA, PWM1_DATA, 0, 0, 0, 0, // 16 -> 23
+ 0, 0, 0, 0, 0, 0, 0, 0, // 24 -> 31
+ 0, 0, 0, 0, 0, 0, 0, 0, // 32 -> 39
+ PWM0_DATA, PWM1_DATA, 0, 0, 0, PWM1_DATA, 0, 0, // 40 -> 47
+ 0, 0, 0, 0, 0, 0, 0, 0, // 48 -> 55
+ 0, 0, 0, 0, 0, 0, 0, 0, // 56 -> 63
+
+} ;
+
+
+// Time for easy calculations
+
+static unsigned long long epoch ;
+
+//////////////////////////////////////////////////////////////////////////////////
+
+
+/*
+ * pinMode:
+ * Sets the mode of a pin to be input, output or PWM output
+ *********************************************************************************
+ */
+
+void pinModeGpio (int pin, int mode)
+{
+ static int pwmRunning = FALSE ;
+ int fSel, shift, alt ;
+
+ pin &= 63 ;
+
+ fSel = gpioToGPFSEL [pin] ;
+ shift = gpioToShift [pin] ;
+
+ /**/ if (mode == INPUT)
+ *(gpio + fSel) = (*(gpio + fSel) & ~(7 << shift)) ; // Sets bits to zero = input
+ else if (mode == OUTPUT)
+ *(gpio + fSel) = (*(gpio + fSel) & ~(7 << shift)) | (1 << shift) ;
+ else if (mode == PWM_OUTPUT)
+ {
+ if ((alt = gpioToPwmALT [pin]) == 0) // Not a PWM pin
+ return ;
+
+// Set pin to PWM mode
+
+ *(gpio + fSel) = (*(gpio + fSel) & ~(7 << shift)) | (alt << shift) ;
+
+// We didn't initialise the PWM hardware at setup time - because it's possible that
+// something else is using the PWM - e.g. the Audio systems! So if we use PWM
+// here, then we're assuming that nothing else is, otherwise things are going
+// to sound a bit funny...
+
+ if (!pwmRunning)
+ {
+
+// Gert/Doms Values
+ *(clk + PWMCLK_DIV) = BCM_PASSWORD | (32<<12) ; // set pwm div to 32 (19.2/3 = 600KHz)
+ *(clk + PWMCLK_CNTL) = BCM_PASSWORD | 0x11 ; // Source=osc and enable
+ digitalWrite (pin, LOW) ;
+ *(pwm + PWM_CONTROL) = 0 ; // Disable PWM
+ delayMicroseconds (10) ;
+ *(pwm + PWM0_RANGE) = 0x400 ;
+ delayMicroseconds (10) ;
+ *(pwm + PWM1_RANGE) = 0x400 ;
+ delayMicroseconds (10) ;
+
+// Enable PWMs
+
+ *(pwm + PWM0_DATA) = 512 ;
+ *(pwm + PWM1_DATA) = 512 ;
+
+ *(pwm + PWM_CONTROL) = PWM0_ENABLE | PWM1_ENABLE ;
+
+ pwmRunning = TRUE ;
+ }
+
+ }
+
+// When we change mode of any pin, we remove the pull up/downs
+
+ pullUpDnControl (pin, PUD_OFF) ;
+}
+
+void pinModeWPi (int pin, int mode)
+{
+ pinModeGpio (pinToGpio [pin & 63], mode) ;
+}
+
+void pinModeSys (int pin, int mode)
+{
+ return ;
+}
+
+
+#ifdef notYetReady
+/*
+ * pinED01:
+ * pinED10:
+ * Enables edge-detect mode on a pin - from a 0 to a 1 or 1 to 0
+ * Pin must already be in input mode with appropriate pull up/downs set.
+ *********************************************************************************
+ */
+
+void pinEnableED01Pi (int pin)
+{
+ pin = pinToGpio [pin & 63] ;
+}
+#endif
+
+
+
+/*
+ * digitalWrite:
+ * Set an output bit
+ *********************************************************************************
+ */
+
+void digitalWriteWPi (int pin, int value)
+{
+ pin = pinToGpio [pin & 63] ;
+
+ if (value == LOW)
+ *(gpio + gpioToGPCLR [pin]) = 1 << (pin & 31) ;
+ else
+ *(gpio + gpioToGPSET [pin]) = 1 << (pin & 31) ;
+}
+
+void digitalWriteGpio (int pin, int value)
+{
+ pin &= 63 ;
+
+ if (value == LOW)
+ *(gpio + gpioToGPCLR [pin]) = 1 << (pin & 31) ;
+ else
+ *(gpio + gpioToGPSET [pin]) = 1 << (pin & 31) ;
+}
+
+void digitalWriteSys (int pin, int value)
+{
+ pin &= 63 ;
+
+ if (sysFds [pin] != -1)
+ {
+ if (value == LOW)
+ write (sysFds [pin], "0\n", 2) ;
+ else
+ write (sysFds [pin], "1\n", 2) ;
+ }
+}
+
+
+/*
+ * pwnWrite:
+ * Set an output PWM value
+ *********************************************************************************
+ */
+
+void pwmWriteWPi (int pin, int value)
+{
+ int port ;
+
+ pin = pinToGpio [pin & 63] ;
+ port = gpioToPwmPort [pin] ;
+
+ *(pwm + port) = value & 0x3FF ;
+}
+
+void pwmWriteGpio (int pin, int value)
+{
+ int port ;
+
+ pin = pin & 63 ;
+ port = gpioToPwmPort [pin] ;
+
+ *(pwm + port) = value & 0x3FF ;
+}
+
+void pwmWriteSys (int pin, int value)
+{
+ return ;
+}
+
+
+/*
+ * setPadDrive:
+ * Set the PAD driver value
+ *********************************************************************************
+ */
+
+void setPadDriveWPi (int group, int value)
+{
+ uint32_t wrVal ;
+
+ if ((group < 0) || (group > 2))
+ return ;
+
+ wrVal = BCM_PASSWORD | 0x18 | (value & 7) ;
+ *(pads + group + 11) = wrVal ;
+
+#ifdef DEBUG_PADS
+ printf ("setPadDrive: Group: %d, value: %d (%08X)\n", group, value, wrVal) ;
+ printf ("Read : %08X\n", *(pads + group + 11)) ;
+#endif
+}
+
+void setPadDriveGpio (int group, int value)
+{
+ setPadDriveWPi (group, value) ;
+}
+
+void setPadDriveSys (int group, int value)
+{
+ return ;
+}
+
+
+/*
+ * digitalRead:
+ * Read the value of a given Pin, returning HIGH or LOW
+ *********************************************************************************
+ */
+
+int digitalReadWPi (int pin)
+{
+ pin = pinToGpio [pin & 63] ;
+
+ if ((*(gpio + gpioToGPLEV [pin]) & (1 << (pin & 31))) != 0)
+ return HIGH ;
+ else
+ return LOW ;
+}
+
+int digitalReadGpio (int pin)
+{
+ pin &= 63 ;
+
+ if ((*(gpio + gpioToGPLEV [pin]) & (1 << (pin & 31))) != 0)
+ return HIGH ;
+ else
+ return LOW ;
+}
+
+int digitalReadSys (int pin)
+{
+ char c ;
+
+ pin &= 63 ;
+
+ if (sysFds [pin] == -1)
+ return 0 ;
+
+ lseek (sysFds [pin], 0L, SEEK_SET) ;
+ read (sysFds [pin], &c, 1) ;
+ return (c == '0') ? 0 : 1 ;
+}
+
+
+/*
+ * pullUpDownCtrl:
+ * Control the internal pull-up/down resistors on a GPIO pin
+ * The Arduino only has pull-ups and these are enabled by writing 1
+ * to a port when in input mode - this paradigm doesn't quite apply
+ * here though.
+ *********************************************************************************
+ */
+
+void pullUpDnControlWPi (int pin, int pud)
+{
+ pin = pinToGpio [pin & 63] ;
+ pud &= 3 ;
+
+ *(gpio + GPPUD) = pud ; delayMicroseconds (10) ;
+ *(gpio + gpioToPUDCLK [pin]) = 1 << (pin & 31) ; delayMicroseconds (10) ;
+
+ *(gpio + GPPUD) = 0 ;
+ *(gpio + gpioToPUDCLK [pin]) = 0 ;
+}
+
+void pullUpDnControlGpio (int pin, int pud)
+{
+ pin &= 63 ;
+ pud &= 3 ;
+
+ *(gpio + GPPUD) = pud ; delayMicroseconds (10) ;
+ *(gpio + gpioToPUDCLK [pin]) = 1 << (pin & 31) ; delayMicroseconds (10) ;
+
+ *(gpio + GPPUD) = 0 ;
+ *(gpio + gpioToPUDCLK [pin]) = 0 ;
+}
+
+void pullUpDnControlSys (int pin, int pud)
+{
+ return ;
+}
+
+
+/*
+ * waitForInterrupt:
+ * Wait for Interrupt on a GPIO pin.
+ * This is actually done via the /sys/class/gpio interface regardless of
+ * the wiringPi access mode in-use. Maybe sometime it might get a better
+ * way for a bit more efficiency.
+ *********************************************************************************
+ */
+
+int waitForInterruptSys (int pin, int mS)
+{
+ int fd, x ;
+ char buf [8] ;
+ struct pollfd polls ;
+
+ if ((fd = sysFds [pin & 63]) == -1)
+ return -2 ;
+
+// Do a dummy read
+
+ x = read (fd, buf, 6) ;
+ if (x < 0)
+ return x ;
+
+// And seek
+
+ lseek (fd, 0, SEEK_SET) ;
+
+// Setup poll structure
+
+ polls.fd = fd ;
+ polls.events = POLLPRI ; // Urgent data!
+
+// Wait for it ...
+
+ return poll (&polls, 1, mS) ;
+}
+
+int waitForInterruptWPi (int pin, int mS)
+{
+ return waitForInterruptSys (pinToGpio [pin & 63], mS) ;
+}
+
+int waitForInterruptGpio (int pin, int mS)
+{
+ return waitForInterruptSys (pin, mS) ;
+}
+
+
+
+
+/*
+ * delay:
+ * Wait for some number of milli seconds
+ *********************************************************************************
+ */
+
+void delay (unsigned int howLong)
+{
+ struct timespec sleeper, dummy ;
+
+ sleeper.tv_sec = (time_t)(howLong / 1000) ;
+ sleeper.tv_nsec = (long)(howLong % 1000) * 1000000 ;
+
+ nanosleep (&sleeper, &dummy) ;
+}
+
+/*
+ * delayMicroseconds:
+ * This is somewhat intersting. It seems that on the Pi, a single call
+ * to nanosleep takes some 80 to 130 microseconds anyway, so while
+ * obeying the standards (may take longer), it's not always what we
+ * want!
+ *
+ * So what I'll do now is if the delay is less than 100uS we'll do it
+ * in a hard loop, watching a built-in counter on the ARM chip. This is
+ * somewhat sub-optimal in that it uses 100% CPU, something not an issue
+ * in a microcontroller, but under a multi-tasking, multi-user OS, it's
+ * wastefull, however we've no real choice )-:
+ *********************************************************************************
+ */
+
+void delayMicrosecondsSys (unsigned int howLong)
+{
+ struct timespec sleeper, dummy ;
+
+ sleeper.tv_sec = 0 ;
+ sleeper.tv_nsec = (long)(howLong * 1000) ;
+
+ nanosleep (&sleeper, &dummy) ;
+}
+
+void delayMicrosecondsHard (unsigned int howLong)
+{
+ *(timer + TIMER_LOAD) = howLong ;
+ *(timer + TIMER_IRQ_CLR) = 0 ;
+
+ while (*timerIrqRaw == 0)
+ ;
+}
+
+void delayMicrosecondsWPi (unsigned int howLong)
+{
+ struct timespec sleeper, dummy ;
+
+ /**/ if (howLong == 0)
+ return ;
+ else if (howLong < 100)
+ delayMicrosecondsHard (howLong) ;
+ else
+ {
+ sleeper.tv_sec = 0 ;
+ sleeper.tv_nsec = (long)(howLong * 1000) ;
+ nanosleep (&sleeper, &dummy) ;
+ }
+}
+
+
+/*
+ * millis:
+ * Return a number of milliseconds as an unsigned int.
+ *********************************************************************************
+ */
+
+unsigned int millis (void)
+{
+ struct timeval tv ;
+ unsigned long long t1 ;
+
+ gettimeofday (&tv, NULL) ;
+
+ t1 = (tv.tv_sec * 1000000 + tv.tv_usec) / 1000 ;
+
+ return (uint32_t)(t1 - epoch) ;
+}
+
+
+/*
+ * wiringPiSetup:
+ * Must be called once at the start of your program execution.
+ *
+ * Default setup: Initialises the system into wiringPi Pin mode and uses the
+ * memory mapped hardware directly.
+ *********************************************************************************
+ */
+
+int wiringPiSetup (void)
+{
+ int fd ;
+ uint8_t *gpioMem, *pwmMem, *clkMem, *padsMem, *timerMem ;
+ struct timeval tv ;
+
+ pinMode = pinModeWPi ;
+ pullUpDnControl = pullUpDnControlWPi ;
+ digitalWrite = digitalWriteWPi ;
+ pwmWrite = pwmWriteWPi ;
+ setPadDrive = setPadDriveWPi ;
+ digitalRead = digitalReadWPi ;
+ waitForInterrupt = waitForInterruptWPi ;
+ delayMicroseconds = delayMicrosecondsWPi ;
+
+// Open the master /dev/memory device
+
+ if ((fd = open ("/dev/mem", O_RDWR | O_SYNC) ) < 0)
+ {
+ fprintf (stderr, "wiringPiSetup: Unable to open /dev/mem: %s\n", strerror (errno)) ;
+ return -1 ;
+ }
+
+// GPIO:
+
+// Allocate 2 pages - 1 ...
+
+ if ((gpioMem = malloc (BLOCK_SIZE + (PAGE_SIZE-1))) == NULL)
+ {
+ fprintf (stderr, "wiringPiSetup: malloc failed: %s\n", strerror (errno)) ;
+ return -1 ;
+ }
+
+// ... presumably to make sure we can round it up to a whole page size
+
+ if (((uint32_t)gpioMem % PAGE_SIZE) != 0)
+ gpioMem += PAGE_SIZE - ((uint32_t)gpioMem % PAGE_SIZE) ;
+
+ gpio = (uint32_t *)mmap((caddr_t)gpioMem, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, fd, GPIO_BASE) ;
+
+ if ((int32_t)gpio < 0)
+ {
+ fprintf (stderr, "wiringPiSetup: mmap failed: %s\n", strerror (errno)) ;
+ return -1 ;
+ }
+
+// PWM
+
+ if ((pwmMem = malloc (BLOCK_SIZE + (PAGE_SIZE-1))) == NULL)
+ {
+ fprintf (stderr, "wiringPiSetup: pwmMem malloc failed: %s\n", strerror (errno)) ;
+ return -1 ;
+ }
+
+ if (((uint32_t)pwmMem % PAGE_SIZE) != 0)
+ pwmMem += PAGE_SIZE - ((uint32_t)pwmMem % PAGE_SIZE) ;
+
+ pwm = (uint32_t *)mmap(pwmMem, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, fd, GPIO_PWM) ;
+
+ if ((int32_t)pwm < 0)
+ {
+ fprintf (stderr, "wiringPiSetup: mmap failed (pwm): %s\n", strerror (errno)) ;
+ return -1 ;
+ }
+
+// Clock control (needed for PWM)
+
+ if ((clkMem = malloc (BLOCK_SIZE + (PAGE_SIZE-1))) == NULL)
+ {
+ fprintf (stderr, "wiringPiSetup: clkMem malloc failed: %s\n", strerror (errno)) ;
+ return -1 ;
+ }
+
+ if (((uint32_t)clkMem % PAGE_SIZE) != 0)
+ clkMem += PAGE_SIZE - ((uint32_t)clkMem % PAGE_SIZE) ;
+
+ clk = (uint32_t *)mmap(clkMem, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, fd, CLOCK_BASE) ;
+
+ if ((int32_t)clk < 0)
+ {
+ fprintf (stderr, "wiringPiSetup: mmap failed (clk): %s\n", strerror (errno)) ;
+ return -1 ;
+ }
+
+// The drive pads
+
+ if ((padsMem = malloc (BLOCK_SIZE + (PAGE_SIZE-1))) == NULL)
+ {
+ fprintf (stderr, "wiringPiSetup: padsMem malloc failed: %s\n", strerror (errno)) ;
+ return -1 ;
+ }
+
+ if (((uint32_t)padsMem % PAGE_SIZE) != 0)
+ padsMem += PAGE_SIZE - ((uint32_t)padsMem % PAGE_SIZE) ;
+
+ pads = (uint32_t *)mmap(padsMem, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, fd, GPIO_PADS) ;
+
+ if ((int32_t)pads < 0)
+ {
+ fprintf (stderr, "wiringPiSetup: mmap failed (pads): %s\n", strerror (errno)) ;
+ return -1 ;
+ }
+
+#ifdef DEBUG_PADS
+ printf ("Checking pads @ 0x%08X\n", (unsigned int)pads) ;
+ printf (" -> %08X %08X %08X\n", *(pads + 11), *(pads + 12), *(pads + 13)) ;
+#endif
+
+// The system timer
+
+ if ((timerMem = malloc (BLOCK_SIZE + (PAGE_SIZE-1))) == NULL)
+ {
+ fprintf (stderr, "wiringPiSetup: timerMem malloc failed: %s\n", strerror (errno)) ;
+ return -1 ;
+ }
+
+ if (((uint32_t)timerMem % PAGE_SIZE) != 0)
+ timerMem += PAGE_SIZE - ((uint32_t)timerMem % PAGE_SIZE) ;
+
+ timer = (uint32_t *)mmap(timerMem, BLOCK_SIZE, PROT_READ|PROT_WRITE, MAP_SHARED|MAP_FIXED, fd, GPIO_TIMER) ;
+
+ if ((int32_t)timer < 0)
+ {
+ fprintf (stderr, "wiringPiSetup: mmap failed (timer): %s\n", strerror (errno)) ;
+ return -1 ;
+ }
+
+// Set the timer to free-running, 1MHz.
+// 0xF9 is 249, the timer divide is base clock / (divide+1)
+// so base clock is 250MHz / 250 = 1MHz.
+
+ *(timer + TIMER_CONTROL) = 0x0000280 ;
+ *(timer + TIMER_PRE_DIV) = 0x00000F9 ;
+ timerIrqRaw = timer + TIMER_IRQ_RAW ;
+
+// Initialise our epoch for millis()
+
+ gettimeofday (&tv, NULL) ;
+ epoch = (tv.tv_sec * 1000000 + tv.tv_usec) / 1000 ;
+
+ return 0 ;
+}
+
+
+/*
+ * wiringPiSetupGpio:
+ * Must be called once at the start of your program execution.
+ *
+ * GPIO setup: Initialises the system into GPIO Pin mode and uses the
+ * memory mapped hardware directly.
+ *********************************************************************************
+ */
+
+int wiringPiSetupGpio (void)
+{
+ int x = wiringPiSetup () ;
+
+ if (x != 0)
+ return x ;
+
+ pinMode = pinModeGpio ;
+ pullUpDnControl = pullUpDnControlGpio ;
+ digitalWrite = digitalWriteGpio ;
+ pwmWrite = pwmWriteGpio ;
+ setPadDrive = setPadDriveGpio ;
+ digitalRead = digitalReadGpio ;
+ waitForInterrupt = waitForInterruptGpio ;
+ delayMicroseconds = delayMicrosecondsWPi ; // Same
+
+ return 0 ;
+}
+
+
+/*
+ * wiringPiSetupSys:
+ * Must be called once at the start of your program execution.
+ *
+ * Initialisation (again), however this time we are using the /sys/class/gpio
+ * interface to the GPIO systems - slightly slower, but always usable as
+ * a non-root user, assuming the devices are already exported and setup correctly.
+ */
+
+int wiringPiSetupSys (void)
+{
+ int pin ;
+ struct timeval tv ;
+ char fName [128] ;
+
+ pinMode = pinModeSys ;
+ pullUpDnControl = pullUpDnControlSys ;
+ digitalWrite = digitalWriteSys ;
+ pwmWrite = pwmWriteSys ;
+ setPadDrive = setPadDriveSys ;
+ digitalRead = digitalReadSys ;
+ waitForInterrupt = waitForInterruptSys ;
+ delayMicroseconds = delayMicrosecondsSys ;
+
+// Open and scan the directory, looking for exported GPIOs, and pre-open
+// the 'value' interface to speed things up for later
+
+ for (pin = 0 ; pin < 64 ; ++pin)
+ {
+ sprintf (fName, "/sys/class/gpio/gpio%d/value", pin) ;
+ sysFds [pin] = open (fName, O_RDWR) ;
+ }
+
+// Initialise the epoch for mills() ...
+
+ gettimeofday (&tv, NULL) ;
+ epoch = (tv.tv_sec * 1000000 + tv.tv_usec) / 1000 ;
+
+ return 0 ;
+}
+
+
--- /dev/null
+/*
+ * wiringPi:
+ * Arduino compatable (ish) Wiring library for the Raspberry Pi
+ * Copyright (c) 2012 Gordon Henderson
+ ***********************************************************************
+ * This file is part of wiringPi:
+ * https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ * wiringPi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * wiringPi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+// Handy defines
+
+#define NUM_PINS 17
+
+#define WPI_MODE_PINS 0
+#define WPI_MODE_GPIO 1
+#define WPI_MODE_GPIO_SYS 2
+#define WPI_MODE_PIFACE 3
+
+#define INPUT 0
+#define OUTPUT 1
+#define PWM_OUTPUT 2
+
+#define LOW 0
+#define HIGH 1
+
+#define PUD_OFF 0
+#define PUD_DOWN 1
+#define PUD_UP 2
+
+// Function prototypes
+// c++ wrappers thanks to a commend by Nick Lott
+// (and others on the Raspberry Pi forums)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Basic wiringPi functions
+
+extern int wiringPiSetup (void) ;
+extern int wiringPiSetupSys (void) ;
+extern int wiringPiSetupGpio (void) ;
+extern int wiringPiSetupPiFace (void) ;
+
+extern int wiringPiSetupPiFaceForGpioProg (void) ; // Don't use this - for gpio program only
+
+extern void (*pinMode) (int pin, int mode) ;
+extern void (*pullUpDnControl) (int pin, int pud) ;
+extern void (*digitalWrite) (int pin, int value) ;
+extern void (*pwmWrite) (int pin, int value) ;
+extern void (*setPadDrive) (int group, int value) ;
+extern int (*digitalRead) (int pin) ;
+extern void (*delayMicroseconds) (unsigned int howLong) ;
+
+// Interrupts
+
+extern int (*waitForInterrupt) (int pin, int mS) ;
+
+// Threads
+
+#define PI_THREAD(X) void *X (void *dummy)
+
+extern int piThreadCreate (void *(*fn)(void *)) ;
+extern void piLock (int key) ;
+extern void piUnlock (int key) ;
+
+// Schedulling priority
+
+extern int piHiPri (int pri) ;
+
+
+// Extras from arduino land
+
+extern void delay (unsigned int howLong) ;
+//extern void delayMicroseconds (unsigned int howLong) ;
+//extern void delayMicrosecondsHard (unsigned int howLong) ;
+extern unsigned int millis (void) ;
+
+#ifdef __cplusplus
+}
+#endif
--- /dev/null
+/*
+ * wiringPiFace:
+ * Arduino compatable (ish) Wiring library for the Raspberry Pi
+ * Copyright (c) 2012 Gordon Henderson
+ *
+ * This file to interface with the PiFace peripheral device which
+ * has an MCP23S17 GPIO device connected via the SPI bus.
+ *
+ ***********************************************************************
+ * This file is part of wiringPi:
+ * https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ * wiringPi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * wiringPi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with wiringPi.
+ * If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+
+#include <stdio.h>
+#include <stdint.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <linux/spi/spidev.h>
+
+#include "wiringPi.h"
+
+
+// The SPI bus parameters
+// Variables as they need to be passed as pointers later on
+
+static char *spiDevice = "/dev/spidev0.0" ;
+static uint8_t spiMode = 0 ;
+static uint8_t spiBPW = 8 ;
+static uint32_t spiSpeed = 5000000 ;
+static uint16_t spiDelay = 0;
+
+// Locals here to keep track of everything
+
+static int spiFd ;
+
+// The MCP23S17 doesn't have bit-set operations, so it's
+// cheaper to keep a copy here than to read/modify/write it
+
+uint8_t dataOutRegister = 0 ;
+uint8_t pudRegister = 0 ;
+
+// MCP23S17 Registers
+
+#define IOCON 0x0A
+
+#define IODIRA 0x00
+#define IPOLA 0x02
+#define GPINTENA 0x04
+#define DEFVALA 0x06
+#define INTCONA 0x08
+#define GPPUA 0x0C
+#define INTFA 0x0E
+#define INTCAPA 0x10
+#define GPIOA 0x12
+#define OLATA 0x14
+
+#define IODIRB 0x01
+#define IPOLB 0x03
+#define GPINTENB 0x05
+#define DEFVALB 0x07
+#define INTCONB 0x09
+#define GPPUB 0x0D
+#define INTFB 0x0F
+#define INTCAPB 0x11
+#define GPIOB 0x13
+#define OLATB 0x15
+
+// Bits in the IOCON register
+
+#define IOCON_BANK_MODE 0x80
+#define IOCON_MIRROR 0x40
+#define IOCON_SEQOP 0x20
+#define IOCON_DISSLW 0x10
+#define IOCON_HAEN 0x08
+#define IOCON_ODR 0x04
+#define IOCON_INTPOL 0x02
+#define IOCON_UNUSED 0x01
+
+// Default initialisation mode
+
+#define IOCON_INIT (IOCON_SEQOP)
+
+// Command codes
+
+#define CMD_WRITE 0x40
+#define CMD_READ 0x41
+
+
+/*
+ * writeByte:
+ * Write a byte to a register on the MCP23S17 on the SPI bus.
+ * This is using the synchronous access mechanism.
+ *********************************************************************************
+ */
+
+static void writeByte (uint8_t reg, uint8_t data)
+{
+ uint8_t spiBufTx [3] ;
+ uint8_t spiBufRx [3] ;
+ struct spi_ioc_transfer spi ;
+
+ spiBufTx [0] = CMD_WRITE ;
+ spiBufTx [1] = reg ;
+ spiBufTx [2] = data ;
+
+ spi.tx_buf = (unsigned long)spiBufTx ;
+ spi.rx_buf = (unsigned long)spiBufRx ;
+ spi.len = 3 ;
+ spi.delay_usecs = spiDelay ;
+ spi.speed_hz = spiSpeed ;
+ spi.bits_per_word = spiBPW ;
+
+ ioctl (spiFd, SPI_IOC_MESSAGE(1), &spi) ;
+}
+
+/*
+ * readByte:
+ * Read a byte from a register on the MCP23S17 on the SPI bus.
+ * This is the synchronous access mechanism.
+ * What appears to happen is that the data returned is at
+ * the same offset as the number of bytes written to the device. So if we
+ * write 2 bytes (e.g. command then register number), then the data returned
+ * will by at the 3rd byte...
+ *********************************************************************************
+ */
+
+static uint8_t readByte (uint8_t reg)
+{
+ uint8_t tx [4] ;
+ uint8_t rx [4] ;
+ struct spi_ioc_transfer spi ;
+
+ tx [0] = CMD_READ ;
+ tx [1] = reg ;
+ tx [2] = 0 ;
+
+ spi.tx_buf = (unsigned long)tx ;
+ spi.rx_buf = (unsigned long)rx ;
+ spi.len = 3 ;
+ spi.delay_usecs = spiDelay ;
+ spi.speed_hz = spiSpeed ;
+ spi.bits_per_word = spiBPW ;
+
+ ioctl (spiFd, SPI_IOC_MESSAGE(1), &spi) ;
+
+ return rx [2] ;
+}
+
+
+/*
+ * digitalWritePiFace:
+ * Perform the digitalWrite function on the PiFace board
+ *********************************************************************************
+ */
+
+void digitalWritePiFace (int pin, int value)
+{
+ uint8_t mask = 1 << pin ;
+
+ if (value == 0)
+ dataOutRegister &= (~mask) ;
+ else
+ dataOutRegister |= mask ;
+
+ writeByte (GPIOA, dataOutRegister) ;
+}
+
+
+void digitalWritePiFaceSpecial (int pin, int value)
+{
+ uint8_t mask = 1 << pin ;
+ uint8_t old ;
+
+ old = readByte (GPIOA) ;
+
+ if (value == 0)
+ old &= (~mask) ;
+ else
+ old |= mask ;
+
+ writeByte (GPIOA, old) ;
+}
+
+
+/*
+ * digitalReadPiFace:
+ * Perform the digitalRead function on the PiFace board
+ *********************************************************************************
+ */
+
+int digitalReadPiFace (int pin)
+{
+ uint8_t mask = 1 << pin ;
+
+ if ((readByte (GPIOB) & mask) != 0)
+ return HIGH ;
+ else
+ return LOW ;
+}
+
+
+/*
+ * pullUpDnControlPiFace:
+ * Perform the pullUpDnControl function on the PiFace board
+ *********************************************************************************
+ */
+
+void pullUpDnControlPiFace (int pin, int pud)
+{
+ uint8_t mask = 1 << pin ;
+
+ if (pud == PUD_UP)
+ pudRegister |= mask ;
+ else
+ pudRegister &= (~mask) ;
+
+ writeByte (GPPUB, pudRegister) ;
+
+}
+
+
+void pullUpDnControlPiFaceSpecial (int pin, int pud)
+{
+ uint8_t mask = 1 << pin ;
+ uint8_t old ;
+
+ old = readByte (GPPUB) ;
+
+ if (pud == PUD_UP)
+ old |= mask ;
+ else
+ old &= (~mask) ;
+
+ writeByte (GPPUB, old) ;
+
+}
+
+
+
+/*
+ * Dummy functions that are not used in this mode
+ *********************************************************************************
+ */
+
+void pinModePiFace (int pin, int mode) {}
+void pwmWritePiFace (int pin, int value) {}
+int waitForInterruptPiFace (int pin, int mS) { return 0 ; }
+
+
+/*
+ * wiringPiSetupPiFace
+ * Setup the SPI interface and initialise the MCP23S17 chip
+ *********************************************************************************
+ */
+
+static int _wiringPiSetupPiFace (void)
+{
+ if ((spiFd = open (spiDevice, O_RDWR)) < 0)
+ return -1 ;
+
+// Set SPI parameters
+// Why are we doing a read after write?
+// I don't know - just blindliy copying an example elsewhere... -GH-
+
+ if (ioctl (spiFd, SPI_IOC_WR_MODE, &spiMode) < 0)
+ return -1 ;
+
+ if (ioctl (spiFd, SPI_IOC_RD_MODE, &spiMode) < 0)
+ return -1 ;
+
+ if (ioctl (spiFd, SPI_IOC_WR_BITS_PER_WORD, &spiBPW) < 0)
+ return -1 ;
+
+ if (ioctl (spiFd, SPI_IOC_RD_BITS_PER_WORD, &spiBPW) < 0)
+ return -1 ;
+
+ if (ioctl (spiFd, SPI_IOC_WR_MAX_SPEED_HZ, &spiSpeed) < 0)
+ return -1 ;
+
+ if (ioctl (spiFd, SPI_IOC_RD_MAX_SPEED_HZ, &spiSpeed) < 0)
+ return -1 ;
+
+// Setup the MCP23S17
+
+ writeByte (IOCON, IOCON_INIT) ;
+
+ writeByte (IODIRA, 0x00) ; // Port A -> Outputs
+ writeByte (IODIRB, 0xFF) ; // Port B -> Inputs
+
+ return 0 ;
+}
+
+
+int wiringPiSetupPiFace (void)
+{
+ int x = _wiringPiSetupPiFace () ;
+
+ if (x != 0)
+ return x ;
+
+ writeByte (GPIOA, 0x00) ; // Set all outptus off
+ writeByte (GPPUB, 0x00) ; // Disable any pull-ups on port B
+
+ pinMode = pinModePiFace ;
+ pullUpDnControl = pullUpDnControlPiFace ;
+ digitalWrite = digitalWritePiFace ;
+ pwmWrite = pwmWritePiFace ;
+ digitalRead = digitalReadPiFace ;
+ waitForInterrupt = waitForInterruptPiFace ;
+
+ return 0 ;
+}
+
+
+/*
+ * wiringPiSetupPiFaceForGpioProg:
+ * Setup the SPI interface and initialise the MCP23S17 chip
+ * Special version for the gpio program
+ *********************************************************************************
+ */
+
+
+int wiringPiSetupPiFaceForGpioProg (void)
+{
+ int x = _wiringPiSetupPiFace () ;
+
+ if (x != 0)
+ return x ;
+
+ pinMode = pinModePiFace ;
+ pullUpDnControl = pullUpDnControlPiFaceSpecial ;
+ digitalWrite = digitalWritePiFaceSpecial ;
+ pwmWrite = pwmWritePiFace ;
+ digitalRead = digitalReadPiFace ;
+ waitForInterrupt = waitForInterruptPiFace ;
+
+ return 0 ;
+}
--- /dev/null
+/*
+ * wiringSerial.c:
+ * Handle a serial port
+ ***********************************************************************
+ * This file is part of wiringPi:
+ * https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ * wiringPi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * wiringPi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+#undef DEBUG
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <string.h>
+#include <termios.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include "wiringSerial.h"
+
+/*
+ * serialOpen:
+ * Open and initialise the serial port, setting all the right
+ * port parameters - or as many as are required - hopefully!
+ *********************************************************************************
+ */
+
+int serialOpen (char *device, int baud)
+{
+ struct termios options ;
+ speed_t myBaud ;
+ int status, fd ;
+
+#ifdef DEBUG
+ printf ("openSerialPort: <%s> baud: $d\n", device, baud) ;
+#endif
+
+ switch (baud)
+ {
+ case 50: myBaud = B50 ; break ;
+ case 75: myBaud = B75 ; break ;
+ case 110: myBaud = B110 ; break ;
+ case 134: myBaud = B134 ; break ;
+ case 150: myBaud = B150 ; break ;
+ case 200: myBaud = B200 ; break ;
+ case 300: myBaud = B300 ; break ;
+ case 600: myBaud = B600 ; break ;
+ case 1200: myBaud = B1200 ; break ;
+ case 1800: myBaud = B1800 ; break ;
+ case 2400: myBaud = B2400 ; break ;
+ case 9600: myBaud = B9600 ; break ;
+ case 19200: myBaud = B19200 ; break ;
+ case 38400: myBaud = B38400 ; break ;
+ case 57600: myBaud = B57600 ; break ;
+ case 115200: myBaud = B115200 ; break ;
+ case 230400: myBaud = B230400 ; break ;
+
+ default:
+ return -2 ;
+ }
+
+ if ((fd = open (device, O_RDWR | O_NOCTTY | O_NDELAY | O_NONBLOCK)) == -1)
+ return -1 ;
+
+ fcntl (fd, F_SETFL, O_RDWR) ;
+
+// Get and modify current options:
+
+ tcgetattr (fd, &options) ;
+
+ cfmakeraw (&options) ;
+ cfsetispeed (&options, myBaud) ;
+ cfsetospeed (&options, myBaud) ;
+
+ options.c_cflag |= (CLOCAL | CREAD) ;
+ options.c_cflag &= ~PARENB ;
+ options.c_cflag &= ~CSTOPB ;
+ options.c_cflag &= ~CSIZE ;
+ options.c_cflag |= CS8 ;
+ options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG) ;
+ options.c_oflag &= ~OPOST ;
+
+ options.c_cc [VMIN] = 0 ;
+ options.c_cc [VTIME] = 100 ; // Ten seconds (100 deciseconds)
+
+ tcsetattr (fd, TCSANOW | TCSAFLUSH, &options) ;
+
+ ioctl (fd, TIOCMGET, &status);
+
+ status |= TIOCM_DTR ;
+ status |= TIOCM_RTS ;
+
+ ioctl (fd, TIOCMSET, &status);
+
+ usleep (10000) ; // 10mS
+
+ return fd ;
+}
+
+
+/*
+ * serialFlush:
+ * Flush the serial buffers (both tx & rx)
+ *********************************************************************************
+ */
+
+void serialFlush (int fd)
+{
+ tcflush (fd, TCIOFLUSH) ;
+}
+
+
+/*
+ * serialClose:
+ * Release the serial port
+ *********************************************************************************
+ */
+
+void serialClose (int fd)
+{
+ close (fd) ;
+}
+
+
+/*
+ * serialPutchar:
+ * Send a single character to the serial port
+ *********************************************************************************
+ */
+
+void serialPutchar (int fd, unsigned char c)
+{
+ write (fd, &c, 1) ;
+}
+
+
+/*
+ * serialPuts:
+ * Send a string to the serial port
+ *********************************************************************************
+ */
+
+void serialPuts (int fd, char *s)
+{
+ write (fd, s, strlen (s)) ;
+}
+
+/*
+ * serialPrintf:
+ * Printf over Serial
+ *********************************************************************************
+ */
+
+void serialPrintf (int fd, char *message, ...)
+{
+ va_list argp ;
+ char buffer [1024] ;
+
+ va_start (argp, message) ;
+ vsnprintf (buffer, 1023, message, argp) ;
+ va_end (argp) ;
+
+ serialPuts (fd, buffer) ;
+}
+
+
+/*
+ * serialDataAvail:
+ * Return the number of bytes of data avalable to be read in the serial port
+ *********************************************************************************
+ */
+
+int serialDataAvail (int fd)
+{
+ int result ;
+
+ if (ioctl (fd, FIONREAD, &result) == -1)
+ return -1 ;
+
+ return result ;
+}
+
+
+/*
+ * serialGetchar:
+ * Get a single character from the serial device.
+ * Note: Zero is a valid character and this function will time-out after
+ * 10 seconds.
+ *********************************************************************************
+ */
+
+int serialGetchar (int fd)
+{
+ uint8_t x ;
+
+ if (read (fd, &x, 1) != 1)
+ return -1 ;
+
+ return ((int)x) & 0xFF ;
+}
--- /dev/null
+/*
+ * wiringSerial.h:
+ * Handle a serial port
+ ***********************************************************************
+ * This file is part of wiringPi:
+ * https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ * wiringPi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * wiringPi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern int serialOpen (char *device, int baud) ;
+extern void serialClose (int fd) ;
+extern void serialFlush (int fd) ;
+extern void serialPutchar (int fd, unsigned char c) ;
+extern void serialPuts (int fd, char *s) ;
+extern void serialPrintf (int fd, char *message, ...) ;
+extern int serialDataAvail (int fd) ;
+extern int serialGetchar (int fd) ;
+
+#ifdef __cplusplus
+}
+#endif
--- /dev/null
+/*
+ * wiringShift.c:
+ * Emulate some of the Arduino wiring functionality.
+ *
+ * Copyright (c) 2009-2012 Gordon Henderson.
+ ***********************************************************************
+ * This file is part of wiringPi:
+ * https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ * wiringPi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * wiringPi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+#include <stdint.h>
+
+#include "wiringPi.h"
+#include "wiringShift.h"
+
+/*
+ * shiftIn:
+ * Shift data in from a clocked source
+ *********************************************************************************
+ */
+
+uint8_t shiftIn (uint8_t dPin, uint8_t cPin, uint8_t order)
+{
+ uint8_t value = 0 ;
+ int8_t i ;
+
+ if (order == MSBFIRST)
+ for (i = 7 ; i >= 0 ; --i)
+ {
+ digitalWrite (cPin, HIGH) ;
+ value |= digitalRead (dPin) << i ;
+ digitalWrite (cPin, LOW) ;
+ }
+ else
+ for (i = 0 ; i < 8 ; ++i)
+ {
+ digitalWrite (cPin, HIGH) ;
+ value |= digitalRead (dPin) << i ;
+ digitalWrite (cPin, LOW) ;
+ }
+
+ return value;
+}
+
+
+/*
+ * shiftOut:
+ * Shift data out to a clocked source
+ *********************************************************************************
+ */
+
+void shiftOut (uint8_t dPin, uint8_t cPin, uint8_t order, uint8_t val)
+{
+ int8_t i;
+
+ if (order == MSBFIRST)
+ for (i = 7 ; i >= 0 ; --i)
+ {
+ digitalWrite (dPin, val & (1 << i)) ;
+ digitalWrite (cPin, HIGH) ;
+ digitalWrite (cPin, LOW) ;
+ }
+ else
+ for (i = 0 ; i < 8 ; ++i)
+ {
+ digitalWrite (dPin, val & (1 << i)) ;
+ digitalWrite (cPin, HIGH) ;
+ digitalWrite (cPin, LOW) ;
+ }
+}
--- /dev/null
+/*
+ * wiringShift.h:
+ * Emulate some of the Arduino wiring functionality.
+ *
+ * Copyright (c) 2009-2012 Gordon Henderson.
+ ***********************************************************************
+ * This file is part of wiringPi:
+ * https://projects.drogon.net/raspberry-pi/wiringpi/
+ *
+ * wiringPi is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * wiringPi is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with wiringPi. If not, see <http://www.gnu.org/licenses/>.
+ ***********************************************************************
+ */
+
+#define LSBFIRST 0
+#define MSBFIRST 1
+
+#ifndef _STDINT_H
+# include <stdint.h>
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+extern uint8_t shiftIn (uint8_t dPin, uint8_t cPin, uint8_t order) ;
+extern void shiftOut (uint8_t dPin, uint8_t cPin, uint8_t order, uint8_t val) ;
+
+#ifdef __cplusplus
+}
+#endif
~ianmdlvl / wiringPi.git / commitdiff
