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Added some tweaks to gpio to set alt modes on pins (sssh!)

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This commit is contained in:
Gordon Henderson
2013-08-03 23:53:35 +01:00
parent 43422be6ac
commit f18c8f7204
3 changed files with 56 additions and 2 deletions
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30
gpio/gpio.c
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@@ -51,7 +51,7 @@ extern void doReadallOld (void) ;
# define FALSE (1==2)
#endif
#define VERSION "2.12"
#define VERSION "2.13"
#define I2CDETECT "/usr/sbin/i2cdetect"
int wpMode ;
@@ -75,6 +75,25 @@ char *usage = "Usage: gpio -v\n"
" gpio gbw <channel> <value>" ; // No trailing newline needed here.
/*
* decodePin:
* Decode a pin "number" which can actually be a pin name to represent
* one of the Pi's on-board pins.
*********************************************************************************
*/
static int decodePin (const char *str)
{
// The first case - see if it's a number:
if (isdigit (str [0]))
return atoi (str) ;
return 0 ;
}
/*
* changeOwner:
* Change the ownership of the file to the real userId of the calling
@@ -639,6 +658,15 @@ void doMode (int argc, char *argv [])
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) ;
else if (strcasecmp (mode, "alt3") == 0) pinModeAlt (pin, 0b111) ;
else if (strcasecmp (mode, "alt4") == 0) pinModeAlt (pin, 0b011) ;
else if (strcasecmp (mode, "alt5") == 0) pinModeAlt (pin, 0b010) ;
else
{
fprintf (stderr, "%s: Invalid mode: %s. Should be in/out/pwm/clock/up/down/tri\n", argv [1], mode) ;