用独立键盘来实现8音符，手动演奏音乐

来源：互联网发布：手机代理软件编辑：程序博客网时间：2024/04/28 18:43

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

#include "./delay/delay.h"#define KEYPORT P0sbit 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 = 5;break;      case 0xdf:num = 6;break;      case 0xbf:num = 7;break;      case 0x7f:num = 8;break;      default:num = 0;break;    }    if(num)    {      High = freq[num - 1][1];      Low  = freq[num - 1][0];      TR0 = 1;    }    else    {      TR0 = 0;    }  }}void timer0_isr(void) interrupt 1{  TH0 = High;  TL0 = Low;  beem = ~beem;}

0 0