/*
* 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>
+
+extern int wiringPiDebug ;
+
#ifndef TRUE
# define TRUE (1==1)
# define FALSE (1==2)
#endif
-#define VERSION "1.1"
+#define VERSION "1.11"
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 -h\n"
+ " gpio [-g] <read/write/wb/pwm/clock/mode> ...\n"
+ " gpio [-p] <read/write/wb> ...\n"
+ " gpio readall\n"
+ " gpio unexportall/exports ...\n"
+ " gpio export/edge/unexport ...\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.
/*
static void _doLoadUsage (char *argv [])
{
- fprintf (stderr, "Usage: %s load <spi/i2c>\n", argv [0]) ;
+ fprintf (stderr, "Usage: %s load <spi/i2c> [SPI bufferSize in KB | I2C baudrate in Kb/sec]\n", argv [0]) ;
exit (1) ;
}
static void doLoad (int argc, char *argv [])
{
- char *module ;
+ char *module1, *module2 ;
char cmd [80] ;
char *file1, *file2 ;
+ char args1 [32], args2 [32] ;
- if (argc != 3)
+ if (argc < 3)
_doLoadUsage (argv) ;
+ args1 [0] = args2 [0] = 0 ;
+
/**/ if (strcasecmp (argv [2], "spi") == 0)
{
- module = "spi_bcm2708" ;
+ module1 = "spidev" ;
+ module2 = "spi_bcm2708" ;
file1 = "/dev/spidev0.0" ;
file2 = "/dev/spidev0.1" ;
+ if (argc == 4)
+ sprintf (args1, " bufsize=%d", atoi (argv [3]) * 1024) ;
+ else if (argc > 4)
+ _doLoadUsage (argv) ;
}
else if (strcasecmp (argv [2], "i2c") == 0)
{
- module = "i2c_bcm2708" ;
+ module1 = "i2c_dev" ;
+ module2 = "i2c_bcm2708" ;
file1 = "/dev/i2c-0" ;
file2 = "/dev/i2c-1" ;
+ if (argc == 4)
+ sprintf (args2, " baudrate=%d", atoi (argv [3]) * 1000) ;
+ else if (argc > 4)
+ _doLoadUsage (argv) ;
}
else
_doLoadUsage (argv) ;
- if (!moduleLoaded (module))
+ if (!moduleLoaded (module1))
+ {
+ sprintf (cmd, "modprobe %s%s", module1, args1) ;
+ system (cmd) ;
+ }
+
+ if (!moduleLoaded (module2))
{
- sprintf (cmd, "modprobe %s", module) ;
+ sprintf (cmd, "modprobe %s%s", module2, args2) ;
system (cmd) ;
}
- if (!moduleLoaded (module))
+ if (!moduleLoaded (module2))
{
- fprintf (stderr, "%s: Unable to load %s\n", argv [0], module) ;
+ fprintf (stderr, "%s: Unable to load %s\n", argv [0], module2) ;
exit (1) ;
}
}
+/*
+ * doReadall:
+ * Read all the GPIO pins
+ *********************************************************************************
+ */
+
+static char *pinNames [] =
+{
+ "GPIO 0", "GPIO 1", "GPIO 2", "GPIO 3", "GPIO 4", "GPIO 5", "GPIO 6", "GPIO 7",
+ "SDA ", "SCL ",
+ "CE0 ", "CE1 ", "MOSI ", "MISO ", "SCLK ",
+ "TxD ", "RxD ",
+ "GPIO 8", "GPIO 9", "GPIO10", "GPIO11",
+} ;
+
+static char *alts [] =
+{
+ "IN ", "OUT ", "ALT0", "ALT1", "ALT2", "ALT3", "ALT4", "ALT5", "XXXX"
+} ;
+
+static void doReadall (void)
+{
+ int pin ;
+
+ printf ("+----------+------+--------+------+-------+\n") ;
+ printf ("| wiringPi | GPIO | Name | Mode | Value |\n") ;
+ printf ("+----------+------+--------+------+-------+\n") ;
+
+ for (pin = 0 ; pin < 64 ; ++pin)
+ {
+ if (wpiPinToGpio (pin) == -1)
+ continue ;
+
+ printf ("| %6d | %3d | %s | %s | %s |\n",
+ pin, wpiPinToGpio (pin),
+ pinNames [pin],
+ alts [getAlt (pin)],
+ digitalRead (pin) == HIGH ? "High" : "Low ") ;
+ }
+
+ printf ("+----------+------+--------+------+-------+\n") ;
+}
+
/*
* doExports:
*********************************************************************************
*/
-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) ;
}
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) ;
+ /**/ 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, "clock") == 0) pinMode (pin, GPIO_CLOCK) ;
+ 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) ;
+ fprintf (stderr, "%s: Invalid mode: %s. Should be in/out/pwm/clock/up/down/tri\n", argv [1], mode) ;
exit (1) ;
}
}
*********************************************************************************
*/
-void doPadDrive (int argc, char *argv [])
+static void doPadDrive (int argc, char *argv [])
{
int group, val ;
}
+/*
+ * doGbw:
+ * gpio gbw channel value
+ * Gertboard Write - To the Analog output
+ *********************************************************************************
+ */
+
+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
+ * From the analog input
+ *********************************************************************************
+ */
+
+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 ;
if ((wpMode == WPI_MODE_PINS) && ((pin < 0) || (pin >= NUM_PINS)))
return ;
- val = atoi (argv [3]) ;
+ /**/ if ((strcasecmp (argv [3], "up") == 0) || (strcasecmp (argv [3], "on") == 0))
+ val = 1 ;
+ else if ((strcasecmp (argv [3], "down") == 0) || (strcasecmp (argv [3], "off") == 0))
+ val = 0 ;
+ else
+ val = atoi (argv [3]) ;
/**/ if (val == 0)
digitalWrite (pin, LOW) ;
digitalWrite (pin, HIGH) ;
}
+/*
+ * doWriteByte:
+ * gpio write value
+ *********************************************************************************
+ */
+
+static void doWriteByte (int argc, char *argv [])
+{
+ int val ;
+
+ if (argc != 3)
+ {
+ fprintf (stderr, "Usage: %s wb value\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ val = (int)strtol (argv [2], NULL, 0) ;
+
+ digitalWriteByte (val) ;
+}
+
/*
* doRead:
}
+/*
+ * doClock:
+ * Output a clock on a pin
+ *********************************************************************************
+ */
+
+void doClock (int argc, char *argv [])
+{
+ int pin, freq ;
+
+ if (argc != 4)
+ {
+ fprintf (stderr, "Usage: %s clock <pin> <freq>\n", argv [0]) ;
+ exit (1) ;
+ }
+
+ pin = atoi (argv [2]) ;
+
+ if ((wpMode == WPI_MODE_PINS) && ((pin < 0) || (pin >= NUM_PINS)))
+ return ;
+
+ freq = atoi (argv [3]) ;
+
+ gpioClockSet (pin, freq) ;
+}
+
+
/*
* doPwm:
* Output a PWM value on a pin
/*
- * 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:
{
int i ;
+ if (getenv ("WIRINGPI_DEBUG") != NULL)
+ {
+ printf ("gpio: wiringPi debug mode enabled\n") ;
+ wiringPiDebug = TRUE ;
+ }
+
if (argc == 1)
{
- fprintf (stderr, "%s: %s\n", argv [0], usage) ;
+ fprintf (stderr, "%s\n", usage) ;
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) ;
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]) ;
+ printf ("\n") ;
+ printf ("This Raspberry Pi is a revision %d board.\n", piBoardRev ()) ;
return 0 ;
}
// 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 load command:
+
+ 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 ;
}
-// Check for PWM operations
+// Check for PWM or Pad Drive operations
if (wpMode != WPI_MODE_PIFACE)
{
- 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], "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 ; }
+ if (strcasecmp (argv [1], "drive") == 0) { doPadDrive (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], "readall" ) == 0) doReadall () ;
+ else if (strcasecmp (argv [1], "read" ) == 0) doRead (argc, argv) ;
+ else if (strcasecmp (argv [1], "write") == 0) doWrite (argc, argv) ;
+ else if (strcasecmp (argv [1], "wb") == 0) doWriteByte (argc, argv) ;
+ else if (strcasecmp (argv [1], "pwm" ) == 0) doPwm (argc, argv) ;
+ else if (strcasecmp (argv [1], "clock") == 0) doClock (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