triangular_5k

#include <wiringPi.h>
#include <stdio.h>
#include <math.h>

#define S1    0
#define S2    1
#define S3    2
#define S4    3

int main (void) {

  int i = 0;

  wiringPiSetup();
  pinMode(S1, OUTPUT);
  pinMode(S2, OUTPUT);
  pinMode(S3, OUTPUT);
  pinMode(S4, OUTPUT);

  while(1) {
    for(i = 0; i<16; i++){
      digitalWriteByte(i);
      delayMicroseconds(6);
    }
    for(i=14; i > 0; i--){
      digitalWriteByte(i);
      delayMicroseconds(6);
    }
 }

  return 0;
}