单片机音乐.txt

基于51单片机的电子音乐程序。C语言版的。

#include <reg51.h> 
#include<stdio.h> 
sbit P32=P3^2;	
sbit P33=P3^3;
sbit P35=P3^5;
//sbit P27=P2^7;
unsigned char ledbuf[8]; 
code unsigned char ledmap[] = {0x3F, 0x06, 0x5B, 0x4F, 0x66, 
0x6D, 0x7D, 0x07, 0x7F, 0x6F}; //8段显示 

void delay(unsigned char cnt) 
{ 
unsigned char i; 
while(cnt--!=0) 
for(i=100;i!=0;i--); 
} 








#define tick 7455		  //170530
#define T100us (256-134) 
unsigned char hour,minute,second,ankey; 
unsigned int c100us; 


void sees() 
{ 
 
ledbuf[0]=0x00; 
ledbuf[1]=0x00; 
ledbuf[2]=ledmap[hour/10]; 
ledbuf[3]=ledmap[hour%10];
ledbuf[4]=ledmap[minute/10]; 
ledbuf[5]=ledmap[minute%10]; 
ledbuf[6]=ledmap[second/10]; 
ledbuf[7]=ledmap[second%10]; 
} 



void displayled() 
{ 

char i; 
unsigned char pos; 
pos=0x01; 
for(i=7;i>=0;i--) 
{ 
P2=0x255; 
P0=ledbuf[i]; 
//if(pos==0x07) P27=0x01;
//else 
P2=~pos; 
delay(2); 
P2=0x255; 
pos<<=1; 
} 
} 





void key() 
{ 

if(P32==0||P33==0||P35==0) 
delay(2); 
if(P32==0||P33==0||P35==0) 
{ 
if(P32==0) 
{ 
hour++; 
if(hour==24) 
hour=0; 
while(P32==0) 
{ 
sees(); 
displayled(); 
} 
} 
if(P33==0) 
{ 
minute++; 
if(minute==60) 
minute=0; 
while(P33==0) 
{ 
sees(); 
displayled(); 
} 
} 
if(P35==0) 
{ 
second++; 
if(second==60) 
second=0; 
while(P35==0) 
{ 
sees(); 
displayled(); 
} 
} 
} 

} 







void t0int()interrupt 1 
{ 
c100us--; 
if(c100us==0) 
{ 
c100us=tick; 
second++; 

if(second==60) 
{ 
second=0; 
minute++; 

if(minute==60) 
{ 
minute=0; 
hour++; 
if(hour==24)hour=0; 
} 
} 
} 
} 

void main() 
{ 

TMOD=0x02; 
TH0=T100us; 
TL0=T100us; 
IE=0x82; 
hour=0; 
minute=0; 
second=0; 
c100us=tick; 
TR0=1; 

while(1) 
{ 
sees(); 
displayled(); 
key(); 
} 
}