wiringpi GPIO 인터럽트 처리

초음파 관련 루틴을 while로 처리해서

오차가 있을것으로 생각되다 보니..

인터럽트 처리방식 검색...

gpio 유틸에도 존재는 한다.

gpio edge <pin> rising/falling/both/none This enables the given pin for edge interrupt triggering on the rising, falling or both edges. (Or none which disables it) [링크 : http://wiringpi.com/the-gpio-utility/]

python 버전

GPIO.add_event_detect(17, GPIO.FALLING, callback=my_callback, bouncetime=300)  GPIO.add_event_detect(23, GPIO.FALLING, callback=my_callback2, bouncetime=300)   [링크 : http://raspi.tv/2013/how-to-use-interrupts-with-python-on-the-raspberry-pi-and-rpi-gpio-part-3]

c 버전

void myInterrupt(void) {    eventCounter++; } int main(void) {   if (wiringPiSetup () < 0) {       fprintf (stderr, "Unable to setup wiringPi: %s\n", strerror (errno));       return 1;   }   // set Pin 17/0 generate an interrupt on high-to-low transitions   // and attach myInterrupt() to the interrupt   if ( wiringPiISR (BUTTON_PIN, INT_EDGE_FALLING, &myInterrupt) < 0 ) {       fprintf (stderr, "Unable to setup ISR: %s\n", strerror (errno));       return 1;   }   // display counter value every second.   while ( 1 ) {     printf( "%d\n", eventCounter );     eventCounter = 0;     delay( 1000 ); // wait 1 second   }   return 0; } [링크 : http://cs.smith.edu/dftwiki/index.php/Tutorial:_Interrupt-Driven_Event-Counter_on_the_Raspberry_Pi]