论坛 › Arduino › 4x4键盘播放MP3

gada888 发表于 2019-11-22 16:37:01

4x4键盘播放MP3

本帖最后由 gada888 于 2019-11-30 15:58 编辑

4x4键盘通常被用来做门禁。看到我那个键盘放了很久吃灰，于是想给他赋予新的功能，这不它来了。播放mp3.

https://v.youku.com/v_show/id_XNDQ0NjQ4NDE3Mg==.html?spm=a2hzp.8244740.0.0

这里主控用的是arduino UNO,

mp3模块

4x4键盘

喇叭一只。8欧即可


4x4键盘内部构造

这是连线图
//you are free to copy the code,but please indicate the reference source is from the maker: gada888

#include <Keypad.h>
char myNum;
int i;
unsigned char order = {0xAA,0x06,0x00,0xB0};

const byte ROWS = 4;
const byte COLS = 4;
char keys = {
{'1','2','3','A'},
{'4','5','6','B'},
{'7','8','9','C'},
{'*','0','#','D'}
};
byte rowPins = {9,8,7,6};
byte colPins = {5,4,3,2};
Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins,
ROWS, COLS);
void setup() {
Serial.begin(9600);
volume(0x1E);
}
void loop() {
    Serial.println("Enter a num -");
for ( i = 0; i < 4; ++i)
{
    while((myNum = keypad.getKey())==NO_KEY) {
      delay(1); // Just wait for a key
    }
    while(keypad.getKey() != NO_KEY) {
      delay(1);
    }
Serial.print(myNum);
}
if(myNum=='A')
{
   play(0x01);
   delay(500);
}
if(myNum=='B')
{
    play(0x02);
    delay(500);
    i=0;
}
if(myNum=='*')
{
    play(0x03);
    delay(500);
    i=0;
}
if(myNum=='#')
{
    play(0x04);
    delay(500);
    i=0;
}
if(myNum=='D')
{
    play(0x05);
    delay(500);
    i=0;
}
}

void play(unsigned char Track)
{
unsigned char play = {0xAA,0x07,0x02,0x00,Track,Track+0xB3};//0xB3=0xAA+0x07+0x02+0x00,鍗虫渶鍚庝竴浣嶄负鏍￠獙鍜?
Serial.write(play,6);
}
void volume( unsigned char vol)
{
unsigned char volume = {0xAA,0x13,0x01,vol,vol+0xBE};//0xBE=0xAA+0x13+0x01,鍗虫渶鍚庝竴浣嶄负鏍￠獙鍜?
Serial.write(volume,5);
}



最后，独一无二的键盘mp3完成了。按4下A，播放一首曲，按4下B播放另一首，我没有放很多曲子，因为mp3的模块仅仅8M存储。

hnyzcj 发表于 2019-11-23 08:17:24

不错的案例

查看完整版本: 4x4键盘播放MP3