单片机时钟程序

可以设置hou_num,min_num,sec_num的值来设置起始时间

#include<reg52.h>

#define uchar unsigned char
#define uint unsigned int

sbit dula=P2^6;
sbit wela=P2^7;

uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};

uchar code table_dp[]={0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,0x87,0xff,0xef,0xf7,0xfc,0xb9,0xde,0xf9,0xf1};

void display(uchar,uchar,uchar,uchar,uchar,uchar);
void delayms(uint);

uchar num1,num2,sec_num,min_num,hou_num,sec_shi,sec_ge,min_shi,min_ge,hou_shi,hou_ge;

int main()
{
    TMOD=0x11;
    TH0=(65535-45872)/256;
    TL0=(65535-45872)%256;
    TH1=(65535-45872)/256;
    TL1=(65535-45872)%256;

    EA=1;
    ET0=1;
    ET1=1;
    TR0=1;
    TR1=1;

    P1=0x00;
    while(1)
    {
        display(sec_shi,sec_ge,min_shi,min_ge,hou_shi,hou_ge);
    }

    return 0;
}

void display(uchar sec_shi,uchar sec_ge,uchar min_shi,uchar min_ge,uchar hou_shi,uchar hou_ge)
{
    //second
    dula=1;
    P0=table[sec_shi];
    dula=0;
    P0=0xff;

    wela=1;
    P0=0xef;
    wela=0;
    delayms(1);

    dula=1;
    P0=table[sec_ge];
    dula=0;
    P0=0xff;

    wela=1;
    P0=0xdf;
    wela=0;
    delayms(1);

    //minute
    dula=1;
    P0=table[min_shi];
    dula=0;
    P0=0xff;

    wela=1;
    P0=0xfb;
    wela=0;
    delayms(1);

    dula=1;
    P0=table_dp[min_ge];
    dula=0;
    P0=0xff;

    wela=1;
    P0=0xf7;
    wela=0;
    delayms(1);

    //hour
    dula=1;
    P0=table[hou_shi];
    dula=0;
    P0=0xff;

    wela=1;
    P0=0xfe;
    wela=0;
    delayms(1);

    dula=1;
    P0=table_dp[hou_ge];
    dula=0;
    P0=0xff;

    wela=1;
    P0=0xfd;
    wela=0;
    delayms(1);
}

void delayms(uint xms)
{
    uint i,j;
    for(i=xms;i>0;i--)
        for(j=112;j>0;j--);
}

void T0_time() interrupt 1
{
    TH0=(65535-45872)/256;
    TL0=(65535-45872)%256;
    num1++;
    if(num1>=10)
    {
        num1=0;
        P1=~P1;
    }
}

void T1_time() interrupt 3
{
    TH1=(65535-45872)/256;
    TL1=(65535-45872)%256;
    num2++;
    if(num2>=20)
    {
        num2=0;
        sec_num++;
        if(sec_num==60)
        {
            sec_num=0;
            min_num++;
            if(min_num==60)
            {
                min_num=0;
                hou_num++;
                if(hou_num==24)
                {
                    hou_num=0;
                }
            }
        }

        sec_shi=sec_num/10;
        sec_ge=sec_num%10;

        min_shi=min_num/10;
        min_ge=min_num%10;

        hou_shi=hou_num/10;
        hou_ge=hou_num%10;
    }
}