A sample C program to test the wiringPi library
/*
* blink.c:
* Simple test program to blink an LED on pin 7
*/
#include <wiringPi.h>
#include <stdio.h>
int main(void)
{
int pin = 7;
printf("Raspberry Pi wiringPi blink test\n");
if (wiringPiSetup() == -1)
exit (1);
pinMode(pin, OUTPUT);
for (;;){
printf("LED On\n");
digitalWrite(pin, 1);
delay(250);
printf("LED Off\n");
digitalWrite(pin, 0);
delay(250);
}
return 0;
}