单片机实时时钟实验程序

ID:72519 · 发表于 2015-1-21 23:33

是用51hei单片机开发板电路图详见：http://www.51hei.com/f/51hei-5.pdf 的数码管部分，用2个74hc573 锁存，p0口作为数据口，注意图中要改一下p3.6和p3.7分别是段和位的锁存端口.P2口上面是按键 p1口上面是8个led灯. 你用单片机自带的定时器来做时钟

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
uchar code SEG7[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
uchar ACT[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
uchar code WEEK_SEG7[8]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x7f};
sbit D=P3^6;
sbit V=P3^7;
uchar deda,sec,min,hour,week=1;
uchar cnt;
//===========
void init(void)
{
TMOD=0x11;
TH0=-(50000/256);
TL0=-(50000%256);
ET0=1;
TR0=1;
TH1=-(1000/256);
TL1=-(1000%256);
ET1=1;
TR1=1;
EA=1;
}
//==========
void time0(void) interrupt 1
{
TH0=-(50000/256);
TL0=-(50000%256);
deda++;
}
//============
void time1(void) interrupt 3
{
TH1=-(1000/256);
TL1=-(1000%256);
if(++cnt>7)cnt=0;
switch(cnt)
{
case 0:D=1;P0=SEG7[sec%10];D=0;P0=0xff;V=1;P0=ACT[5];V=0;break;
case 1:D=1;P0=SEG7[sec/10];D=0;P0=0xff;V=1;P0=ACT[4];V=0;break;
case 2:D=1;P0=SEG7[min%10];D=0;P0=0xff;V=1;P0=ACT[3];V=0;break;
case 3:D=1;P0=SEG7[min/10];D=0;P0=0xff;V=1;P0=ACT[2];V=0;break;
case 4:D=1;P0=SEG7[hour%10];D=0;P0=0xff;V=1;P0=ACT[1];V=0;break;
case 5:D=1;P0=SEG7[hour/10];D=0;P0=0xff;V=1;P0=ACT[0];V=0;break;
case 6:D=1;P0=0x00;D=0;P0=0xff;V=1;P0=0xff;V=0;break;
case 7:D=1;P0=WEEK_SEG7[week];D=0;P0=0xff;V=1;P0=ACT[7];V=0;break;
default:break;
}
}
//========
void conv(void)
{
if(deda>=20){deda=0;sec++;}
if(sec>=60){sec=0;min++;}
if(min>=60){min=0;hour++;}
if(hour>=24){hour=0;week++;}
if(week>7){week=1;}
}
//===========
void delay(uint k)
{
uint data i,j;
for(i=0;i<k;i++){
for(j=0;j<121;j++)
{;}}
}
//========
uchar scan_key(void)
{
uchar temp;
P2=0xff;
temp=P2;
if(temp!=0xff)
{delay(20);
temp=P2;
if(temp!=0xff)return temp;
}
return 0;
}
//===================
void main(void)
{uchar key_flag;
init();
while(1)
{
conv();
key_flag=scan_key();
switch(key_flag)
{
case 0xef:if(++min>59)min=0;delay(300);break;
case 0xdf:if(++hour>23)hour=0;delay(300);break;
case 0xbf:if(++week>7)week=1;delay(300);break;
default:break;
}
}
}

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单片机实时时钟实验程序

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