* gpio.c:
* Swiss-Army-Knife, Set-UID command-line interface to the Raspberry
* Pi's GPIO.
- * Copyright (c) 2012-2013 Gordon Henderson
+ * Copyright (c) 2012-2015 Gordon Henderson
***********************************************************************
* This file is part of wiringPi:
* https://projects.drogon.net/raspberry-pi/wiringpi/
#include <sys/stat.h>
#include <wiringPi.h>
+#include <wpiExtensions.h>
#include <gertboard.h>
#include <piFace.h>
-#include "extensions.h"
+#include "version.h"
extern int wiringPiDebug ;
# define FALSE (1==2)
#endif
-#define VERSION "2.20"
#define PI_USB_POWER_CONTROL 38
#define I2CDETECT "/usr/sbin/i2cdetect"
" gpio pwmr <range> \n"
" gpio pwmc <divider> \n"
" gpio load spi/i2c\n"
+ " gpio unload spi/i2c\n"
" gpio i2cd/i2cdetect\n"
" gpio usbp high/low\n"
" gpio gbr <channel>\n"
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) ;
+ fprintf (stderr, "%s: Warning (not an error, do not report): 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) ;
- }
+ fprintf (stderr, "%s: Warning (not an error): Unable to change ownership of %s: %s\n", cmd, file, strerror (errno)) ;
}
}
*********************************************************************************
*/
+static void checkDevTree (char *argv [])
+{
+ struct stat statBuf ;
+
+ if (stat ("/proc/device-tree", &statBuf) == 0) // We're on a devtree system ...
+ {
+ fprintf (stderr,
+"%s: Unable to load/unload modules as this Pi has the device tree enabled.\n"
+" You need to run the raspi-config program (as root) and select the\n"
+" modules (SPI or I2C) that you wish to load/unload there and reboot.\n"
+" There is more information here:\n"
+" https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=97314\n", argv [0]) ;
+ exit (1) ;
+ }
+}
+
static void _doLoadUsage (char *argv [])
{
- fprintf (stderr, "Usage: %s load <spi/i2c> [SPI bufferSize in KB | I2C baudrate in Kb/sec]\n", argv [0]) ;
+ fprintf (stderr, "Usage: %s load <spi/i2c> [I2C baudrate in Kb/sec]\n", argv [0]) ;
exit (1) ;
}
char *file1, *file2 ;
char args1 [32], args2 [32] ;
+ checkDevTree (argv) ;
+
if (argc < 3)
_doLoadUsage (argv) ;
file1 = "/dev/spidev0.0" ;
file2 = "/dev/spidev0.1" ;
if (argc == 4)
- sprintf (args1, " bufsiz=%d", atoi (argv [3]) * 1024) ;
+ {
+ fprintf (stderr, "%s: Unable to set the buffer size now. Load aborted. Please see the man page.\n", argv [0]) ;
+ exit (1) ;
+ }
else if (argc > 4)
_doLoadUsage (argv) ;
}
if (!moduleLoaded (module1))
{
- sprintf (cmd, "modprobe %s%s", module1, args1) ;
+ sprintf (cmd, "/sbin/modprobe %s%s", module1, args1) ;
system (cmd) ;
}
if (!moduleLoaded (module2))
{
- sprintf (cmd, "modprobe %s%s", module2, args2) ;
+ sprintf (cmd, "/sbin/modprobe %s%s", module2, args2) ;
system (cmd) ;
}
}
+/*
+ * doUnLoad:
+ * Un-Load either the spi or i2c modules and change device ownerships, etc.
+ *********************************************************************************
+ */
+
+static void _doUnLoadUsage (char *argv [])
+{
+ fprintf (stderr, "Usage: %s unload <spi/i2c>\n", argv [0]) ;
+ exit (1) ;
+}
+
+static void doUnLoad (int argc, char *argv [])
+{
+ char *module1, *module2 ;
+ char cmd [80] ;
+
+ checkDevTree (argv) ;
+
+ if (argc != 3)
+ _doUnLoadUsage (argv) ;
+
+ /**/ if (strcasecmp (argv [2], "spi") == 0)
+ {
+ module1 = "spidev" ;
+ module2 = "spi_bcm2708" ;
+ }
+ else if (strcasecmp (argv [2], "i2c") == 0)
+ {
+ module1 = "i2c_dev" ;
+ module2 = "i2c_bcm2708" ;
+ }
+ else
+ _doUnLoadUsage (argv) ;
+
+ if (moduleLoaded (module1))
+ {
+ sprintf (cmd, "/sbin/rmmod %s", module1) ;
+ system (cmd) ;
+ }
+
+ if (moduleLoaded (module2))
+ {
+ sprintf (cmd, "/sbin/rmmod %s", module2) ;
+ system (cmd) ;
+ }
+}
+
+
/*
* doI2Cdetect:
* Run the i2cdetect command with the right runes for this Pi revision
exit (1) ;
}
- /**/ if ((strcasecmp (mode, "in") == 0) || (strcasecmp (mode, "input") == 0))
+ /**/ if ((strcasecmp (mode, "in") == 0) || (strcasecmp (mode, "input") == 0))
fprintf (fd, "in\n") ;
- else if ((strcasecmp (mode, "out") == 0) || (strcasecmp (mode, "output") == 0))
+ else if ((strcasecmp (mode, "out") == 0) || (strcasecmp (mode, "output") == 0))
fprintf (fd, "out\n") ;
+ else if ((strcasecmp (mode, "high") == 0) || (strcasecmp (mode, "up") == 0))
+ fprintf (fd, "high\n") ;
+ else if ((strcasecmp (mode, "low") == 0) || (strcasecmp (mode, "down") == 0))
+ fprintf (fd, "low\n") ;
else
{
- fprintf (stderr, "%s: Invalid mode: %s. Should be in or out\n", argv [1], mode) ;
+ fprintf (stderr, "%s: Invalid mode: %s. Should be in, out, high or low\n", argv [1], mode) ;
exit (1) ;
}
fclose (fd) ;
-// Change ownership so the current user can actually use it!
+// Change ownership so the current user can actually use it
sprintf (fName, "/sys/class/gpio/gpio%d/value", pin) ;
changeOwner (argv [0], fName) ;
}
-/*
- * doResetExternal:
- * Load readallExternal, we try to do this with an external device.
- *********************************************************************************
- */
-
-static void doResetExternal (void)
-{
- int pin ;
-
- for (pin = wiringPiNodes->pinBase ; pin <= wiringPiNodes->pinMax ; ++pin)
- {
- pinMode (pin, INPUT) ;
- pullUpDnControl (pin, PUD_OFF) ;
- }
-}
-
-
/*
* doReset:
* Reset the GPIO pins - as much as we can do
static void doReset (char *progName)
{
- int pin ;
-
- if (wiringPiNodes != NULL) // External reset
- doResetExternal () ;
- else
- {
- doUnexportall (progName) ;
-
- for (pin = 0 ; pin < 64 ; ++pin)
- {
- if (wpiPinToGpio (pin) == -1)
- continue ;
-
- digitalWrite (pin, LOW) ;
- pinMode (pin, INPUT) ;
- pullUpDnControl (pin, PUD_OFF) ;
- }
- }
+ printf ("GPIO Reset is dangerous and has been removed from the gpio command.\n") ;
+ printf (" - Please write a shell-script to reset the GPIO pins into the state\n") ;
+ printf (" that you need them in for your applications.\n") ;
}
else if (strcasecmp (mode, "down") == 0) pullUpDnControl (pin, PUD_DOWN) ;
else if (strcasecmp (mode, "tri") == 0) pullUpDnControl (pin, PUD_OFF) ;
else if (strcasecmp (mode, "off") == 0) pullUpDnControl (pin, PUD_OFF) ;
-
-// Undocumented
-
else if (strcasecmp (mode, "alt0") == 0) pinModeAlt (pin, 0b100) ;
else if (strcasecmp (mode, "alt1") == 0) pinModeAlt (pin, 0b101) ;
else if (strcasecmp (mode, "alt2") == 0) pinModeAlt (pin, 0b110) ;
{
int i ;
int model, rev, mem, maker, overVolted ;
+ struct stat statBuf ;
+
if (getenv ("WIRINGPI_DEBUG") != NULL)
{
if (strcmp (argv [1], "-v") == 0)
{
printf ("gpio version: %s\n", VERSION) ;
- printf ("Copyright (c) 2012-2014 Gordon Henderson\n") ;
+ printf ("Copyright (c) 2012-2015 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 ("Raspberry Pi Details:\n") ;
printf (" Type: %s, Revision: %s, Memory: %dMB, Maker: %s %s\n",
piModelNames [model], piRevisionNames [rev], mem, piMakerNames [maker], overVolted ? "[OV]" : "") ;
+
+// Check for device tree
+
+ if (stat ("/proc/device-tree", &statBuf) == 0) // We're on a devtree system ...
+ printf (" Device tree is enabled.\n") ;
+
+ if (stat ("/dev/gpiomem", &statBuf) == 0) // User level GPIO is GO
+ printf (" This Raspberry Pi supports user-level GPIO access.\n") ;
+ else
+ printf (" * Root or sudo required for GPIO access.\n") ;
+
}
return 0 ;
}
if (strcasecmp (argv [1], "-warranty") == 0)
{
printf ("gpio version: %s\n", VERSION) ;
- printf ("Copyright (c) 2012-2014 Gordon Henderson\n") ;
+ printf ("Copyright (c) 2012-2015 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") ;
// Check for load command:
- if (strcasecmp (argv [1], "load" ) == 0) { doLoad (argc, argv) ; return 0 ; }
+ if (strcasecmp (argv [1], "load" ) == 0) { doLoad (argc, argv) ; return 0 ; }
+ if (strcasecmp (argv [1], "unload" ) == 0) { doUnLoad (argc, argv) ; return 0 ; }
// Gertboard commands
exit (EXIT_FAILURE) ;
}
- if (!doExtension (argv [0], argv [2])) // Prints its own error messages
+ if (!loadWPiExtension (argv [0], argv [2], TRUE)) // Prints its own error messages
exit (EXIT_FAILURE) ;
for (i = 3 ; i < argc ; ++i)
~ianmdlvl / wiringPi.git / blobdiff