用树莓派实现RGB LED的颜色控制——C语言版本号

这里是一个简单的用C语言实现树莓派控制RGB LED的例子：

#include <wiringPi.h>

#define RED_PIN    0
#define GREEN_PIN  1
#define BLUE_PIN   2

int main (void) {
  if (wiringPiSetup () == -1) {
    return 1;
  }

  pinMode (RED_PIN, OUTPUT);
  pinMode (GREEN_PIN, OUTPUT);
  pinMode (BLUE_PIN, OUTPUT);

  while (1) {
    digitalWrite (RED_PIN, HIGH);
    digitalWrite (GREEN_PIN, LOW);
    digitalWrite (BLUE_PIN, LOW);
    delay (1000);

    digitalWrite (RED_PIN, LOW);
    digitalWrite (GREEN_PIN, HIGH);
    digitalWrite (BLUE_PIN, LOW);
    delay (1000);

    digitalWrite (RED_PIN, LOW);
    digitalWrite (GREEN_PIN, LOW);
    digitalWrite (BLUE_PIN, HIGH);
    delay (1000);

    digitalWrite (RED_PIN, HIGH);
    digitalWrite (GREEN_PIN, HIGH);
    digitalWrite (BLUE_PIN, LOW);
    delay (1000);

    digitalWrite (RED_PIN, HIGH);
    digitalWrite (GREEN_PIN, LOW);
    digitalWrite (BLUE_PIN, HIGH);
    delay (1000);

    digitalWrite (RED_PIN, LOW);
    digitalWrite (GREEN_PIN, HIGH);
    digitalWrite (BLUE_PIN, HIGH);
    delay (1000);
  }

  return 0;
}

这个程序使用了WiringPi库来控制GPIO引脚，定义了三个宏来表示红、绿、蓝三个引脚的编号，然后循环不断地改变这三个引脚的状态，以产生不同的颜色。你可以根据需要修改程序来实现自己想要的颜色和效果。