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Fix #357 Multithreaded PWM.

This commit is contained in:
Guy McSwain 2022-01-30 14:23:59 -06:00
parent c88c5c9e4e
commit f077c61882
1 changed files with 5 additions and 0 deletions
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5
pigpio.c
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@ -8828,6 +8828,7 @@ static void stopHardwarePWM(void)
int gpioSetMode(unsigned gpio, unsigned mode)
{
int reg, shift, old_mode;
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
DBG(DBG_USER, "gpio=%d mode=%d", gpio, mode);
@ -8839,6 +8840,8 @@ int gpioSetMode(unsigned gpio, unsigned mode)
if (mode > PI_ALT3)
SOFT_ERROR(PI_BAD_MODE, "gpio %d, bad mode (%d)", gpio, mode);
pthread_mutex_lock(&mutex);
reg = gpio/10;
shift = (gpio%10) * 3;
@ -8853,6 +8856,8 @@ int gpioSetMode(unsigned gpio, unsigned mode)
gpioReg[reg] = (gpioReg[reg] & ~(7<<shift)) | (mode<<shift);
pthread_mutex_unlock(&mutex);
return 0;
}