实体接线：
树梅派学习 4. 双色LED实验_#include

到树梅派新建文件 ：
/home/pi/study/01.DualLED/C
新建：
dule_color_led.c

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

#define uchar unsigned char

#define LedPinRed    0
#define LedPinGreen  1

void ledInit(void)
{
  softPwmCreate(LedPinRed,  0, 100);
  softPwmCreate(LedPinGreen,0, 100);
}

void ledColorSet(uchar r_val, uchar g_val)
{
  softPwmWrite(LedPinRed,   r_val);
  softPwmWrite(LedPinGreen, g_val);
}

int main(void)
{
  int i;

  if(wiringPiSetup() == -1){ //when initialize wiring failed,print messageto screen
    printf("setup wiringPi failed !");
    return 1; 
  }
  //printf("linker LedPin : GPIO %d(wiringPi pin)\n",LedPin); //when initialize wiring successfully,print message to screen

  ledInit();

  while(1){
    ledColorSet(0xff,0x00);   //red 
    delay(500);
    ledColorSet(0x00,0xff);   //green
    delay(500);
    ledColorSet(0xff,0x45); 
    delay(500);
    ledColorSet(0xff,0xff); 
    delay(500);
    ledColorSet(0x7c,0xfc); 
    delay(500);
  }

  return 0;
}

编译运行：

gcc dule_color_led.c -o led -lwiringPi -lpthread
./led

树梅派学习 4. 双色LED实验_#include_02

运行结果可以看到双色灯红、黄交替闪烁。