RT-Thread-AB32VG1系列之点灯RT-Thread问答社区

AB32VG1系列之点灯

发布于 2021-03-11 20:30:46 浏览：1258 订阅该版

[tocm]

# AB32VG1点亮RGB灯

> 时间：2021年3月11日20:07:48
>
> 作者：JiangYangJie

## 1.硬件

开发板上板载一个LED灯
![image-20210311201348618.png](https://oss-club.rt-thread.org/uploads/20210311/4fe4bba1423c8f9c928f0093dc231f0d.png)

原理图如下图
![image-20210311201222781.png](https://oss-club.rt-thread.org/uploads/20210311/1141f210cba644b7fdd86f808e7275fe.png)
![image-20210311201406610.png](https://oss-club.rt-thread.org/uploads/20210311/846c542d4a34d35b07e74d6a482ed570.png)

- 引脚PA2对应RGB灯的蓝灯 
- 引脚PE1对应RGB灯的红灯 
- 引脚PE4对应RGB灯的绿灯 
- RGB为共阴极。

## 2.软件

> rgb.c

```c
struct Led_s{
    uint8_t LED_R;
    uint8_t LED_B;
    uint8_t LED_G;
};  // 定义一个RGB结构体

struct Led_s Led;

void RGB_Init(void){
    // 获得led成员
    Led.LED_R = rt_pin_get("PE.1");
    Led.LED_G = rt_pin_get("PE.4");
    Led.LED_B = rt_pin_get("PA.2");
    // 设置引脚为输出方式
    rt_pin_mode(Led.LED_R, PIN_MODE_OUTPUT);
    rt_pin_mode(Led.LED_G, PIN_MODE_OUTPUT);
    rt_pin_mode(Led.LED_B, PIN_MODE_OUTPUT);
}
// on=1：红灯亮，on=0:全灭
void RGB_Red(rt_bool_t on){
    if (on) {
        rt_pin_write(Led.LED_R, PIN_LOW);
    }else {
        rt_pin_write(Led.LED_R, PIN_HIGH);
    }
    rt_pin_write(Led.LED_G, PIN_HIGH);
    rt_pin_write(Led.LED_B, PIN_HIGH);
}

void RGB_Blue(rt_bool_t on){
    if (on) {
        rt_pin_write(Led.LED_B, PIN_LOW);
    }else {
        rt_pin_write(Led.LED_B, PIN_HIGH);
    }
    rt_pin_write(Led.LED_G, PIN_HIGH);
    rt_pin_write(Led.LED_R, PIN_HIGH);
}

void RGB_Green(rt_bool_t on){
    if (on) {
        rt_pin_write(Led.LED_G, PIN_LOW);
    }else {
        rt_pin_write(Led.LED_G, PIN_HIGH);
    }
    rt_pin_write(Led.LED_R, PIN_HIGH);
    rt_pin_write(Led.LED_B, PIN_HIGH);
}
```

> main.c

```c
#include "main.h"

static void rgb_thread_entry(void* p)
{
    RGB_Init();
    while(1)
    {
      rt_thread_mdelay(1000);
      RGB_Blue(1);
      rt_thread_mdelay(1000);
      rt_thread_mdelay(1000);
      RGB_Green(1);
      rt_thread_mdelay(1000);
      RGB_Red(1);
    }
}

static int Thread_RGB(void){
    rt_thread_t thread = RT_NULL;
    thread = rt_thread_create("rgb", rgb_thread_entry, RT_NULL, 512, 10, 10);
    if(thread == RT_NULL)
    {
        rt_kprintf("Thread_GRB Init ERROR");
        return RT_ERROR;
    }
    rt_thread_startup(thread);
}

INIT_APP_EXPORT(Thread_RGB); // 线程自动初始化

int main(void)
{
    while (1){
        rt_thread_mdelay(1000); //空延时
    };
    return 0;
}
```

若三个LED同时亮，则RGB为白色。

## 参考

[中科蓝讯 AB32VG1 RISC-V开发板模块评测任务大挑战](https://club.rt-thread.org/ask/article/2576.html)
[ AB32VG1_Example](https://ab32vg1-example.readthedocs.io/zh/latest/index.html)