/*
* gpio.c:
- * Set-UID command-line interface to the Raspberry Pi's GPIO
+ * Swiss-Army-Knife, Set-UID command-line interface to the Raspberry
+ * Pi's GPIO.
* Copyright (c) 2012 Gordon Henderson
***********************************************************************
* This file is part of wiringPi:
***********************************************************************
*/
-#include <wiringPi.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <fcntl.h>
+#include <wiringPi.h>
+#include <gertboard.h>
+
#ifndef TRUE
# define TRUE (1==1)
# define FALSE (1==2)
#endif
-#define VERSION "1.1"
+#define VERSION "1.2"
static int wpMode ;
char *usage = "Usage: gpio -v\n"
+ " gpio -h\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 pwm-bal/pwm-ms \n"
" gpio pwmr <range> \n"
- " gpio load spi/i2c" ;
-
+ " gpio pwmc <divider> \n"
+ " gpio load spi/i2c\n"
+ " gpio gbr <channel>\n"
+ " gpio gbw <channel> <value>" ; // No trailing newline needed here.
/*
*********************************************************************************
*/
-void doExports (void)
+static void doExports (int argc, char *argv [])
{
int fd ;
int i, l, first ;
int pin ;
char *mode ;
char fName [128] ;
- uid_t uid ;
- gid_t gid ;
if (argc != 4)
{
exit (1) ;
}
- pin = atoi (argv [2]) ;
-
+ pin = atoi (argv [2]) ;
mode = argv [3] ;
// Export the pin and set direction to input
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") ;
+ /**/ 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 () ;
+// Change ownership of the value and edge files, so the current user can actually use it!
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
+ changeOwner (argv [0], fName) ;
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) ;
- }
+ changeOwner (argv [0], fName) ;
fclose (fd) ;
}
*********************************************************************************
*/
-void doPadDrive (int argc, char *argv [])
+static void doPadDrive (int argc, char *argv [])
{
int group, val ;
}
+/*
+ * doGbw:
+ * gpio gbw channel value
+ *********************************************************************************
+ */
+
+static void doGbw (int argc, char *argv [])
+{
+ int channel, value ;
+
+ if (argc != 4)
+ {
+ fprintf (stderr, "Usage: %s gbr <channel> <value>\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ channel = atoi (argv [2]) ;
+ value = atoi (argv [3]) ;
+
+ if ((channel < 0) || (channel > 1))
+ {
+ fprintf (stderr, "%s: channel must be 0 or 1\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ if ((value < 0) || (value > 1023))
+ {
+ fprintf (stderr, "%s: value must be from 0 to 255\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ if (gertboardSPISetup () == -1)
+ {
+ fprintf (stderr, "Unable to initialise the Gertboard SPI interface: %s\n", strerror (errno)) ;
+ exit (1) ;
+ }
+
+ gertboardAnalogWrite (channel, value) ;
+}
+
+
+/*
+ * doGbr:
+ * gpio gbr channel
+ *********************************************************************************
+ */
+
+static void doGbr (int argc, char *argv [])
+{
+ int channel ;
+
+ if (argc != 3)
+ {
+ fprintf (stderr, "Usage: %s gbr <channel>\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ channel = atoi (argv [2]) ;
+
+ if ((channel < 0) || (channel > 1))
+ {
+ fprintf (stderr, "%s: channel must be 0 or 1\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ if (gertboardSPISetup () == -1)
+ {
+ fprintf (stderr, "Unable to initialise the Gertboard SPI interface: %s\n", strerror (errno)) ;
+ exit (1) ;
+ }
+
+ printf ("%d\n",gertboardAnalogRead (channel)) ;
+}
+
+
+
/*
* doWrite:
* gpio write pin value
*********************************************************************************
*/
-void doWrite (int argc, char *argv [])
+static void doWrite (int argc, char *argv [])
{
int pin, val ;
/*
- * doPwmMode: doPwmRange:
- * Change the PWM mode and Range values
+ * doPwmMode: doPwmRange: doPwmClock:
+ * Change the PWM mode, range and clock divider values
*********************************************************************************
*/
pwmSetRange (range) ;
}
+static void doPwmClock (int argc, char *argv [])
+{
+ unsigned int clock ;
+
+ if (argc != 3)
+ {
+ fprintf (stderr, "Usage: %s pwmc <clock>\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ clock = (unsigned int)strtoul (argv [2], NULL, 10) ;
+
+ if ((clock < 1) || (clock > 4095))
+ {
+ fprintf (stderr, "%s: clock must be between 0 and 4096\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ pwmSetClock (clock) ;
+}
+
/*
* main:
return 1 ;
}
+ if (strcasecmp (argv [1], "-h") == 0)
+ {
+ printf ("%s: %s\n", argv [0], usage) ;
+ return 0 ;
+ }
+
if (strcasecmp (argv [1], "-v") == 0)
{
printf ("gpio version: %s\n", VERSION) ;
// 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 ; }
+ /**/ if (strcasecmp (argv [1], "exports" ) == 0) { doExports (argc, argv) ; 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 ; }
+ else if (strcasecmp (argv [1], "unexport" ) == 0) { doUnexport (argc, argv) ; return 0 ; }
+
+// Check for drive or load commands:
+
+ if (strcasecmp (argv [1], "drive") == 0) { doPadDrive (argc, argv) ; return 0 ; }
+ if (strcasecmp (argv [1], "load" ) == 0) { doLoad (argc, argv) ; return 0 ; }
+
+// Gertboard commands
+
+ if (strcasecmp (argv [1], "gbr" ) == 0) { doGbr (argc, argv) ; return 0 ; }
+ if (strcasecmp (argv [1], "gbw" ) == 0) { doGbw (argc, argv) ; return 0 ; }
// Check for -g argument
{
if (wiringPiSetupGpio () == -1)
{
- fprintf (stderr, "%s: Unable to initialise GPIO in GPIO mode.\n", argv [0]) ;
+ fprintf (stderr, "%s: Unable to initialise GPIO mode.\n", argv [0]) ;
exit (1) ;
}
{
if (wiringPiSetup () == -1)
{
- fprintf (stderr, "%s: Unable to initialise GPIO in wiringPi mode\n", argv [0]) ;
+ fprintf (stderr, "%s: Unable to initialise wiringPi mode\n", argv [0]) ;
exit (1) ;
}
wpMode = WPI_MODE_PINS ;
if (strcasecmp (argv [1], "pwm-bal") == 0) { doPwmMode (PWM_MODE_BAL) ; return 0 ; }
if (strcasecmp (argv [1], "pwm-ms") == 0) { doPwmMode (PWM_MODE_MS) ; return 0 ; }
if (strcasecmp (argv [1], "pwmr") == 0) { doPwmRange (argc, argv) ; return 0 ; }
+ if (strcasecmp (argv [1], "pwmc") == 0) { doPwmClock (argc, argv) ; return 0 ; }
}
// 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) ;
+ /**/ if (strcasecmp (argv [1], "read" ) == 0) doRead (argc, argv) ;
+ else if (strcasecmp (argv [1], "write") == 0) doWrite (argc, argv) ;
+ else if (strcasecmp (argv [1], "pwm" ) == 0) doPwm (argc, argv) ;
+ else if (strcasecmp (argv [1], "mode" ) == 0) doMode (argc, argv) ;
else
{
- fprintf (stderr, "%s: Unknown command: %s. (read/write/pwm/mode/drive expected)\n", argv [0], argv [1]) ;
+ fprintf (stderr, "%s: Unknown command: %s.\n", argv [0], argv [1]) ;
exit (1) ;
}
return 0 ;
~ianmdlvl / wiringPi.git / blobdiff