讓板載 RGB 燈交替閃爍

2. 開(kāi)發(fā)板硬件平臺(tái)

RGB燈硬件電路，可知，使用 RGB 燈組要使用

PE1 —— 紅

PA1 —— 藍(lán)

PE4 —— 綠

3. 軟件編寫(xiě)

在 application 目錄下，新建 rgb.c 和 rgb.h

//rgb.c
/*
 * Copyright (c) 2006-2021, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2021-11-06     Administrator       the first version
 */
#include "rgb.h"
#include "rtthread.h"
#include "board.h"

struct Led_s
{
    uint8_t LED_R;
    uint8_t LED_B;
    uint8_t LED_G;
};   //  定義一個(gè) RGB 結(jié)構(gòu)體

struct Led_s Led;
rt_thread_t rgb_thread = RT_NULL;

void RGB_Init(void)
{
    //  獲得 led
    Led.LED_R = rt_pin_get("PE.1");
    Led.LED_G = rt_pin_get("PE.4");
    Led.LED_B = rt_pin_get("PA.1");
    //  設(shè)置引腳為輸出方式
    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);

    rt_kprintf("rgb init success\n");
}

//傳入?yún)?shù)  on=1：對(duì)應(yīng)亮，on=0:對(duì)應(yīng)滅
//紅燈驅(qū)動(dòng)
void RGB_Red(rt_bool_t on)
{
    rt_pin_write(Led.LED_G, PIN_HIGH);
    rt_pin_write(Led.LED_B, PIN_HIGH);
    if (on) {
        rt_pin_write(Led.LED_R, PIN_LOW);
    } else {
        rt_pin_write(Led.LED_R, PIN_HIGH);
    }
}
//藍(lán)燈驅(qū)動(dòng)
void RGB_Blue(rt_bool_t on){
    rt_pin_write(Led.LED_G, PIN_HIGH);
    rt_pin_write(Led.LED_R, PIN_HIGH);
    if (on) {
        rt_pin_write(Led.LED_B, PIN_LOW);
    } else {
        rt_pin_write(Led.LED_B, PIN_HIGH);
    }
}
//綠燈驅(qū)動(dòng)
void RGB_Green(rt_bool_t on)
{
    rt_pin_write(Led.LED_R, PIN_HIGH);
    rt_pin_write(Led.LED_B, PIN_HIGH);
    if (on) {
        rt_pin_write(Led.LED_G, PIN_LOW);
    } else {
        rt_pin_write(Led.LED_G, PIN_HIGH);
    }
}

void rgb_switch(void)
{
    static uint8_t led_num = 0;
    if(led_num == 0)
        RGB_Red(1);
    else if(led_num == 1)
        RGB_Blue(1);
    else if(led_num == 2)
        RGB_Green(1);
    led_num++;
    if(led_num == 3)
        led_num = 0;
}

void rgb_thread_entry(void* p)
{
    RGB_Init();
    while(1)
    {
        rt_thread_mdelay(500);
        rgb_switch();
    }
}

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

INIT_APP_EXPORT(Thread_RGB);

//rgb.h
/*
 * Copyright (c) 2006-2021, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2021-11-06     Administrator       the first version
 */
#ifndef APPLICATIONS_RGB_H_
#define APPLICATIONS_RGB_H_

#endif /* APPLICATIONS_RGB_H_ */

修改main.c

/*
 * Copyright (c) 2020-2021, Bluetrum Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2020/12/10     greedyhao    The first version
 */

/**
 * Notice!
 * All functions or data that are called during an interrupt need to be in RAM.
 * You can do it the way exception_isr() does.
 */

#include 
#include "board.h"

int main(void)
{
    rt_kprintf("Hello, world\n");

    while (1)
    {
        rt_thread_mdelay(500);
        rt_thread_mdelay(500);
    }
}

4. 程序編譯下載

編譯程序，點(diǎn)擊小錘子即可。

下載程序

打開(kāi)我們下載的Downloader軟件，雙擊Downloader.exe

配置連接串口，千萬(wàn)不要搞錯(cuò)串口號(hào)哦。

選擇工程目錄下的\Debug\rtthread.dcf，這里我的完整目錄是

D:\RT-ThreadStudio\workspace\ab32vg1_demo\Debug\rtthread.dcf

點(diǎn)擊開(kāi)始即可下載成功

5. 實(shí)驗(yàn)現(xiàn)象：

download 串口打印 msh 控制臺(tái)信息。

板載RGB燈，紅色綠色藍(lán)色交替閃爍。

6. 總結(jié)

每一個(gè)偉大的程序員都要從 led 及 helloworld 開(kāi)始，哈哈。

編輯：fqj