#include <reg52.H>
//********数码管位代码表(P2口)**********//
unsigned char code dispbit[]={0x01,0x02,0x04,0x08};
//********数码管段代码表(P0口，共阴且高位接dp，低位接a笔段)**********//
unsigned char code dispcode[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F};
//********6位数据缓冲器**********//
unsigned char dispbuf[8];
unsigned char temp[8];
unsigned char dispcount;
unsigned char T0count;
unsigned char timecount;
void initial();
void dataDisplay();
bit flag;
sbit Fin=P3^4;
sbit key=P3^7;
unsigned long x,freq;
void delay(unsigned int cnt)//延时
{
while(--cnt);
}
//*********初始化模块**********//
void initial(void){
P0=0;
P2=0;
TMOD=0x15;
TH0=0;
TL0=0;
TH1=(65536-4000)/256;
TL1=(65536-4000)%256;
TR1=1;
TR0=1;
ET0=1;
ET1=1;
EA=1;
}
//*********显示模块**********//
void dataDisplay(){
unsigned char i;
for(i=0;i<4;i++){
temp[i]=0;
}
i=0;
while(x/10){
temp[i]=x%10;
x=x/10;
i++;
}
P0=temp[0];
P2=0;
delay(300);
P0=temp[1];
P2=1;
delay(300);
P0=temp[2];
P2=2;
delay(300);
P0=temp[3];
P2=3;
delay(300);
//temp[i]=x;
/*for(i=0;i<4;i++){
dispbuf[i]=temp[i];
}
for(dispcount=0; dispcount<4; dispcount++)
{ P0=dispcode[dispbuf[dispcount]];
P2=dispbit[dispcount];
delay();
}*/
}
//******************************************************//
/**************************延时函数************************************/
//******************************************************//
//*********定时中断服务程序1**********//
void t1(void) interrupt 3 using 0{
TH1=(65536-4000)/256;
TL1=(65536-4000)%256;
timecount++;
freq=T0count*65536+TH0*256+TL0;
while(timecount==250)
{TR0=0;TR1=0;
}
}
//******************************************************//
//*********定时中断服务程序2**********//
void t0(void) interrupt 1 using 0
{
T0count++;
}
//******************************************************//
//*********主函数**********//
void main(void){
while(1){
if(key==1)
{ timecount=0;
T0count =0;
initial();
}
else
{ x=freq;
x=x*20;
dataDisplay();
}
}
}
