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基于AB32VG1的按鍵控制LED顯示的實(shí)驗(yàn)，本實(shí)驗(yàn)材料較為簡(jiǎn)單，僅僅運(yùn)用了GPIO的輸出和輸入功能，但是本套設(shè)備重點(diǎn)在于培養(yǎng)C語(yǔ)言的能力。運(yùn)用本套設(shè)備可以實(shí)現(xiàn)嵌入式單片機(jī)開(kāi)發(fā)的多種功能，比如，按鍵中斷，定時(shí)器，GPIO輸入輸出，可以訓(xùn)練我們對(duì)C語(yǔ)言中各種循環(huán)和函數(shù)的使用，增強(qiáng)我們的C語(yǔ)言基礎(chǔ)能力，為后續(xù)的開(kāi)發(fā)打好基礎(chǔ)。 本作品的功能有：1按鍵控制LED亮滅。2按鍵控制LED更換顏色。3按鍵控制LED在正常閃爍和PWM呼吸燈之間切換。

硬件: AB32VG1開(kāi)發(fā)板，

板上資源：CPU：AB5301A；（LQFP48 封裝，主頻 120M，片上集成 RAM 192K, flash 8Mbit，ADC，PWM，USB，UART，IIC 等資源）

一路 TF Card 接口，用來(lái)插入sd卡，存儲(chǔ)要播放的wav音頻文件

一路 USB 接口，用來(lái)下載更新代碼

一路音頻接口(美標(biāo) CTIA)，用來(lái)外接音響設(shè)備播放聲音。

六路 PWM 輸出引腳端子引出，用來(lái)控制臥室燈光調(diào)光調(diào)色。

一個(gè)全彩 LED 燈模塊，一個(gè)電源指示燈，三個(gè)燒錄指示燈，用來(lái)做指示。

一個(gè) Reset 按鍵，三個(gè)功能按鍵(通用版為兩個(gè)功能按鍵)，用于復(fù)位。

板子規(guī)格尺寸：6cm*9cm

I/O 口通過(guò) 2.54MM 標(biāo)準(zhǔn)間距引出，同時(shí)兼容 Arduino Uno 擴(kuò)展接口

開(kāi)發(fā)環(huán)境：

開(kāi)發(fā)工具及版本：RT-Thread Studio 2.0.1

平臺(tái)：Windows 10

RT-Thread系統(tǒng)：RT-Thread標(biāo)準(zhǔn)版

RT-Thread版本：RT-Thread V 4.0.3

組件部分：LED、PWM、串口、按鍵 

#include <rtthread.h>
#include "board.h"
int main(void)
{
    uint8_t green = rt_pin_get("PE.4");             //定義綠色LED燈的引腳，uint8_t為數(shù)據(jù)類(lèi)型
    uint8_t blue = rt_pin_get("PA.1");             //定義綠色LED燈的引腳，uint8_t為數(shù)據(jù)類(lèi)型
    uint8_t red = rt_pin_get("PE.1");             //定義綠色LED燈的引腳，uint8_t為數(shù)據(jù)類(lèi)型
    uint8_t key = rt_pin_get("PF.1");               //定義按鍵引腳
    rt_pin_mode(green, PIN_MODE_OUTPUT);            //定義LED為輸出
    rt_pin_mode(red, PIN_MODE_OUTPUT);            //定義LED為輸出
    rt_pin_mode(blue, PIN_MODE_OUTPUT);            //定義LED為輸出
    rt_pin_mode(key, PIN_MODE_INPUT_PULLUP );       //定義按鍵為輸入
    rt_pin_write(green, PIN_HIGH);                  //將LED置為高電平
    int16_t i;
    i = 0;
    /*while(1){
            if(rt_pin_read(key) == 1)
                {
                    rt_pin_write(green, PIN_LOW);
                }
            if(rt_pin_read(key) == 0)
               {
                    rt_pin_write(green, PIN_HIGH);
               }
    }//while循環(huán)要有，使程序一直運(yùn)行*/
    while(1){
        if(rt_pin_read(key) == 0)
        {
            rt_thread_mdelay(500);
            i = 1+i;
        }
        if (i == 9) {
            i = 0;
        }
        if(i == 1)
        {
            rt_pin_write(red, PIN_LOW);
            rt_pin_write(green, PIN_HIGH);
            rt_pin_write(blue, PIN_HIGH);
        }
        if (i == 2)
        {
            rt_pin_write(red, PIN_HIGH);
            rt_pin_write(green, PIN_LOW);
            rt_pin_write(blue, PIN_HIGH);
        }
        if(i == 3)
        {
            rt_pin_write(red, PIN_HIGH);
            rt_pin_write(green, PIN_HIGH);
            rt_pin_write(blue, PIN_LOW);
        }
        if(i == 4)
        {
            rt_pin_write(red, PIN_LOW);
            rt_pin_write(green, PIN_LOW);
            rt_pin_write(blue, PIN_HIGH);
        }
        if(i == 5)
        {
            rt_pin_write(red, PIN_LOW);
            rt_pin_write(green, PIN_HIGH);
            rt_pin_write(blue, PIN_LOW);
        }
        if(i == 6)
        {
            rt_pin_write(red, PIN_HIGH);
            rt_pin_write(green, PIN_LOW);
            rt_pin_write(blue, PIN_LOW);
        }
        if(i == 7)
        {
            rt_pin_write(red, PIN_LOW);
            rt_pin_write(green, PIN_LOW);
            rt_pin_write(blue, PIN_LOW);
        }
        if(i == 8)
        {
            rt_thread_mdelay(2000);
                    rt_pin_write(red, PIN_HIGH);
                    rt_pin_write(green, PIN_HIGH);
                    rt_pin_write(blue, PIN_HIGH);
                    //紅1
                    rt_pin_write(red, PIN_LOW);
                    rt_thread_mdelay(500);
                    rt_pin_write(red, PIN_HIGH);
                    rt_thread_mdelay(500);
                    //綠2
                    rt_pin_write(green, PIN_LOW);
                    rt_thread_mdelay(500);
                    rt_pin_write(green, PIN_HIGH);
                    rt_thread_mdelay(500);
                    //藍(lán)3
                    rt_pin_write(blue, PIN_LOW);
                    rt_thread_mdelay(500);
                    rt_pin_write(blue, PIN_HIGH);
                    rt_thread_mdelay(500);
                    //黃1+3
                    rt_pin_write(blue, PIN_LOW);
                    rt_pin_write(red, PIN_LOW);
                    rt_thread_mdelay(500);
                    rt_pin_write(blue, PIN_HIGH);
                    rt_pin_write(red, PIN_HIGH);
                    rt_thread_mdelay(500);
                    //紫2+3
                    rt_pin_write(blue, PIN_LOW);
                    rt_pin_write(green, PIN_LOW);
                    rt_thread_mdelay(500);
                    rt_pin_write(blue, PIN_HIGH);
                    rt_pin_write(green, PIN_HIGH);
                    rt_thread_mdelay(500);
                    //1+2
                    rt_pin_write(red, PIN_LOW);
                    rt_pin_write(green, PIN_LOW);
                    rt_thread_mdelay(500);
                    rt_pin_write(red, PIN_HIGH);
                    rt_pin_write(green, PIN_HIGH);
                    rt_thread_mdelay(500);
                    //1+2+3
                    rt_pin_write(red, PIN_LOW);
                    rt_pin_write(green, PIN_LOW);
                    rt_pin_write(blue, PIN_LOW);
                    rt_thread_mdelay(500);
                    rt_pin_write(red, PIN_HIGH);
                    rt_pin_write(green, PIN_HIGH);
                    rt_pin_write(blue, PIN_HIGH);
                    rt_thread_mdelay(500);
        }


    }
}

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