librpip

librpipGpioPinEventWait

uint32_t librpipGpioPinEventWait(uint32_t pin, uint32_t timeout);

Description

Waits for a preconfigured event to occur.

Parameters

• uint32_t pin
  The pin number to check. The pin should be valid.
• uint32_t timeout
  The amount of time to wait in µs (10 -6s).

Returns

0 on failure, 1 on success. The event not occurring in the timeout period is considered a failure.

Example

Setup GPIO pin 16 for rise event and wait to see if it occurs in 35ms :

uint32_t feature_set, triggered;
feature_set = librpipInit(LIBRPIP_BOARD_DETECT, LIBRPIP_FLAG_DEBUG_ON, 0);
if(feature_set & LIBRPIP_FEATURE_GPIO) { 
        librpipGpioConfigPinWrite(16, LIBRPIP_GPIO_FLAG_FNC_IN | LIBRPIP_GPIO_FLAG_ED_RISE);
        if(librpipGpioPinEventWait(16, 35000)) {//pin 16 rose}
} 
librpipClose();