#include<reg52.h>
//unsigned char bbit[] = {0x04, 0x02 ,0x01};
unsigned char buffer[3] = {7,0,0};
unsigned char hour = 8, minute =0; //定义小时、分钟，并初始化小时为8，分钟为0
unsigned char const table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07, //共阴数码管段选码表，无小数点
0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
unsigned int count;
unsigned int i,j;
sbit key0 = P3^2;
sbit key1 = P3^3;
sbit key2 = P3^4;
sbit key3 = P3^5;
sbit key4 = P3^6;
sbit led = P1^0;
sbit beep = P2^3;
sbit JDQ = P3^0;
/*毫秒级延时函数*/
void delay(unsigned char ms)
{
unsigned int j;
while(ms--)
for(j=0;j<120;j++);
}
/*数码管显示函数*/
void display()
{
unsigned int i,shu;
for(i=0;i<3;i++)
{
shu = buffer[i];
P1 = 0x9f>>i ;
P0 = table[shu];
delay(5);
}
}
/*定时器中断服务程序*/
void Timer() interrupt 1 using 1
{
TH0 = (65536 - 50000)/256;
TL0 = (65536 - 50000)%256;
if(count == 1200) //1分定时
{
count = 0;
if(hour == 0 && minute == 0)
{
JDQ = 1; //继电器动作
while(1)
{
led = 0; //指示灯常亮
while(1)
{
beep = 0;
}
}
}
if(minute == 0)
{
minute = 60;
hour--;
if(hour>=9)
hour = 9;
}
minute--;
if(minute >= 59)
minute = 59;
}
buffer[0] = minute%10;
buffer[1] = minute/10;
buffer[2] = hour;
count++;
if(count%10 == 0)
led = ~led;
}
/*主函数*/
void main()
{
JDQ = 0;
P1 = 0xff;
P0 = 0;
TMOD = 0x01;
TH0 = (65536 - 50000)/256;
TL0 = (65536 - 50000)%256;
EA = 1;
ET0 = 1;
while(1)
{
P3 = 0xff;
buffer[0] = minute%10;
buffer[1] = minute/10;
buffer[2] = hour;
display();
if(key0 == 0) //key0（P1^0）键控制分钟“加十”
{
delay(5);
if(key0 == 0)
{
minute += 10;
if(minute >= 59)
minute = 0;
}
while(key0 == 0);
}
if(key1 == 0) //key1（P1^1）键控制分钟“减十”
{
delay(5);
if(key1 == 0)
{
minute -= 10;
if(minute >= 59)
minute = 0;
}
while(key1 == 0);
}
if(key3 == 0) //key3（P1^3）键控制小时“加一”
{
delay(5);
if(key3 == 0)
{
hour += 1;
if(hour >= 9)
hour = 9;
}
while(key3 == 0);
}
if(key2 == 0) //key2（P1^2）键控制小时“减一”
{
delay(5);
if(key2 == 0)
{
hour -= 1;
if(hour >= 9)
hour = 9;
}
while(key2 == 0);
}
if(key4 == 0) //按下设置键，开始计时
break;
}
TR0 = 1;
while(1)
{
P1 = 0xff;
display();
}
}
