#define ENV_DEBUG "WIRINGPI_DEBUG"
#define ENV_CODES "WIRINGPI_CODES"
+#define ENV_GPIOMEM "WIRINGPI_GPIOMEM"
// Mask for the bottom 64 pins which belong to the Raspberry Pi
int wiringPiDebug = FALSE ;
int wiringPiReturnCodes = FALSE ;
+// Use /dev/gpiomem ?
+
+int wiringPiTryGpioMem = FALSE ;
+
// sysFds:
// Map a file descriptor from the /sys/class/gpio/gpioX/value
if ((wiringPiMode == WPI_MODE_PINS) || (wiringPiMode == WPI_MODE_PHYS) || (wiringPiMode == WPI_MODE_GPIO))
{
+ if (RASPBERRY_PI_PERI_BASE == 0) // Ignore for now
+ return ;
+
if ((group < 0) || (group > 2))
return ;
{
if ((wiringPiMode == WPI_MODE_PINS) || (wiringPiMode == WPI_MODE_PHYS) || (wiringPiMode == WPI_MODE_GPIO))
{
+ if (RASPBERRY_PI_PERI_BASE == 0) // Ignore for now
+ return ;
+
*(pwm + PWM0_RANGE) = range ; delayMicroseconds (10) ;
*(pwm + PWM1_RANGE) = range ; delayMicroseconds (10) ;
}
if ((wiringPiMode == WPI_MODE_PINS) || (wiringPiMode == WPI_MODE_PHYS) || (wiringPiMode == WPI_MODE_GPIO))
{
+ if (RASPBERRY_PI_PERI_BASE == 0) // Ignore for now
+ return ;
+
if (wiringPiDebug)
printf ("Setting to: %d. Current: 0x%08X\n", divisor, *(clk + PWMCLK_DIV)) ;
else if (wiringPiMode != WPI_MODE_GPIO)
return ;
+ if (RASPBERRY_PI_PERI_BASE == 0) // Ignore for now
+ return ;
+
divi = 19200000 / freq ;
divr = 19200000 % freq ;
divf = (int)((double)divr * 4096.0 / 19200000.0) ;
softToneCreate (origPin) ;
else if (mode == PWM_TONE_OUTPUT)
{
+ if (RASPBERRY_PI_PERI_BASE == 0) // Ignore for now
+ return ;
+
pinMode (origPin, PWM_OUTPUT) ; // Call myself to enable PWM mode
pwmSetMode (PWM_MODE_MS) ;
}
else if (mode == PWM_OUTPUT)
{
+ if (RASPBERRY_PI_PERI_BASE == 0) // Ignore for now
+ return ;
+
if ((alt = gpioToPwmALT [pin]) == 0) // Not a hardware capable PWM pin
return ;
}
else if (mode == GPIO_CLOCK)
{
+ if (RASPBERRY_PI_PERI_BASE == 0) // Ignore for now
+ return ;
+
if ((alt = gpioToGpClkALT0 [pin]) == 0) // Not a GPIO_CLOCK pin
return ;
if ((pin & PI_GPIO_MASK) == 0) // On-Board Pin
{
+ if (RASPBERRY_PI_PERI_BASE == 0) // Ignore for now
+ return ;
+
/**/ if (wiringPiMode == WPI_MODE_PINS)
pin = pinToGpio [pin] ;
else if (wiringPiMode == WPI_MODE_PHYS)
{
int range ;
+ if (RASPBERRY_PI_PERI_BASE == 0) // Ignore for now
+ return ;
+
if (freq == 0)
pwmWrite (pin, 0) ; // Off
else
if (getenv (ENV_CODES) != NULL)
wiringPiReturnCodes = TRUE ;
+ if (getenv (ENV_GPIOMEM) != NULL)
+ wiringPiTryGpioMem = TRUE ;
+
if (wiringPiDebug)
+ {
printf ("wiringPi: wiringPiSetup called\n") ;
+ if (wiringPiTryGpioMem)
+ printf ("wiringPi: Using /dev/gpiomem\n") ;
+ }
boardRev = piBoardRev () ;
// See if /dev/gpiomem exists and we can open it...
- if ((fd = open ("/dev/gpiomem", O_RDWR | O_SYNC | O_CLOEXEC) ) >= 0)
+ if (wiringPiTryGpioMem)
+ {
+ if ((fd = open ("/dev/gpiomem", O_RDWR | O_SYNC | O_CLOEXEC) ) < 0)
+ return wiringPiFailure (WPI_ALMOST, "wiringPiSetup: Unable to open /dev/gpiomem: %s\n", strerror (errno)) ;
RASPBERRY_PI_PERI_BASE = 0 ;
+ }
// ... otherwise fall back to the original /dev/mem which requires root level access