라즈베리파이 wiringPi GPIO LED 제어하기- C 코드

$ cd  ~/WORK_WiringPi/WiringPi_C
$ vi  LEDonoff.c
#include <stdio.h>
#include <wiringPi.h>
 
#define LED 0
int main(){
    printf ("Raspberry Pi LED ON<---> Off Test...\n") ;
    if(wiringPiSetup() == -1)
        return -1;
    pinMode(LED, OUTPUT);  // Mode 설정

    while(1){
      digitalWrite(LED, HIGH);
      delay(1000);

      digitalWrite(LED, LOW);
      delay(1000);
  }
    return 0;
}

$ gcc  -o  LEDonoff LEDonoff.c  -lwiringpi 
$ ./LEDonoff
pi@raspberrypi:~/gpio.d $ gpio readall