【單片機】單片機演奏兩隻老虎

#include <reg52.h>
#include "./delay/delay.h"

#define SEGPORT P0
#define KEYPORT P1

sbit seg_select = P2^1;
sbit bit_select = P2^0;
sbit beep = P2^7;

//unsigned char seg_data[16]= {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
//unsigned char bit_data[8]= {0x0,0x0,0x0,0x0,0x0,0x0,0xbf,0x7f};
//unsigned char time[2] = {0};
int music[40] = {1,2,3,1,1,2,3,1,3,4,5,5,3,4,5,5,5,6,5,4,3,1,5,6,5,4,3,1,1,5,1,1,1,5,1,1,};
unsigned char High,Low;
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
};

void timer0_isr(void) interrupt 1
{
    TH0 = High;
	  TL0 = Low;
	  beep = ~beep;
}
void timer0_init(void)
{
    EA = 1;
	  TMOD |= 0x01;
	  TH0 = 0;
	  TL0 = 0;
	  ET0 = 1;
	  TR0 = 1;
}
void main()
{
    unsigned char num = 0;
	  unsigned char i = 0;
	  int sound = 0;
	  timer0_init();
	
	  while(1)
		{
			 
			  sound = music[i];
			  i++;
			  if(40 == i)
				{
						i = 0;
				}
				switch(sound)
			  {
						case 1:num = 1;break;
					  case 2:num = 2;break;
					  case 3:num = 3;break;
					  case 4:num = 4;break;
					  case 5:num = 5;break;
					  case 6:num = 6;break;
					  case 7:num = 7;break;
					  case 8:num = 8;break;
					  default : num = 0;break;
				}
				if(num)
				{
						High = freq[num - 1][1];
					  Low = freq[num - 1][0];
					  TR0 = 1;
					  delay_ms(200);
					  delay_ms(200);
					  delay_ms(200);
				}
// 				else
// 				{
// 						TR0 = 0;
//         }
		}
}