用独立键盘来实现8音符，手动演奏音乐

最新推荐文章于 2018-05-08 17:37:00 发布

root_robot

最新推荐文章于 2018-05-08 17:37:00 发布

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分类专栏：单片机文章标签：音乐单片机独立键盘

本文链接：https://blog.youkuaiyun.com/root_robot/article/details/52517306

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<span style="font-family: Arial, Helvetica, sans-serif;">#include <reg52.h></span>

#include "./delay/delay.h"

#define KEYPORT P0

sbit beem = P3^0;

unsigned char code freq[][2]={ 
  0xD8,0xF7,//00440HZ 1   
  0xBD,0xF8,//00494HZ 2  
  0x87,0xF9,//00554HZ 3  
  0xE4,0xF9,//00587HZ 4    
  0x90,0xFA,//00659HZ 5     
  0x29,0xFB,//00740HZ 6     
  0xB1,0xFB,//00831HZ 7      
  0xEF,0xFB,//00880HZ `1
};

unsigned char High;
unsigned char Low;

void timer0_init(void)
{
    EA = 1;
	  TMOD |= 0x01;
	  TH0 = 0;
	  TL0 = 0;
	  ET0 = 1;
	  TR0 = 0;
}

void main()
{
	  unsigned char num = 0;
	
	  timer0_init();
	
	  while(1)
		{
        switch(KEYPORT)
		    {		
				    case 0xfe:num = 1;break;
			      case 0xfd:num = 2;break;
			      case 0xfb:num = 3;break;
			      case 0xf7:num = 4;break;
			      case 0xef:num =