写一段用52单片机可以通过按键切换歌曲的程序代码
时间: 2024-05-21 15:12:52 浏览: 5
以下是用51单片机编写的按键切换音乐的示例程序:
#include <reg52.h>
sbit key1 = P1^0; //定义按键1
sbit key2 = P1^1; //定义按键2
unsigned char music_index = 0; //定义音乐索引,初始值为0
unsigned char music[2][4] = { //定义两首歌曲的音符
{0x01, 0x02, 0x03, 0x04},
{0x05, 0x06, 0x07, 0x08}
};
void delay_ms(unsigned int x) //延时函数
{
unsigned int i, j;
for (i = x; i > 0; i--) {
for (j = 110; j > 0; j--);
}
}
void play_music(unsigned char index) //播放音乐函数
{
unsigned char i;
for(i = 0; i<4; i++) {
P2 = music[index][i];
delay_ms(500);
P2 = 0;
delay_ms(100);
}
}
void main()
{
while(1)
{
if(key1 == 0) { //按键1触发切换到第一首歌曲
music_index = 0;
play_music(music_index);
while(key1 == 0); //等待按键松开
}
if(key2 == 0) { //按键2触发切换到第二首歌曲
music_index = 1;
play_music(music_index);
while(key2 == 0); //等待按键松开
}
}
}