基于单片机的数字电压表程序代码（C代码）|51单片机|STM32|AVR - 逆天PCB论坛

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# include <reg52.h>
# include <intrins.h>
# define uchar unsigned char
# define uint unsigned int
sbit CLOCK=P3^6;
sbit START=P3^7;
sbit EOC=P3^4;
sbit OE=P3^5;
sbit ALE=P3^3;
sbit A=P3^2;
sbit B1=P3^1;
sbit C=P3^0;
long x,y,shu,ge,fen1,fen2,fen3,jia,j;

void delay(int z)
{
    int a ,b;
    for(a=z;a>0;a--)
    for(b=110;b>0;b--);
}

uchar code table[]={0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,0x87,0xff,0xef};
uchar code table1[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};

void display(uint ge,fen1,fen2,fen3)
{
    if(jia%2!=0)
    {
    P0=0x40;
    P2=0xfe;
    delay(1);
    P2=0xff;

    P0=table1[ge];
    P2=0xfd;
    delay(1);
    P2=0xff;

    P0=table[fen1];
    P2=0xfb;
    delay(1);
    P2=0xff;

    P0=table1[fen2];
    P2=0xf7;
    delay(1);
    P2=0xff;

//     P0=table1[fen3];
//     P2=0xf7;
//     delay(5);
//     P2=0xff;
}
if(jia%2==0)
{

    P0=table1[ge];
      P2=0xef;
    delay(1);
    P2=0xff;
    P0=table[fen1];
    P2=0xdf;
    delay(1);
    P2=0xff;
    P0=table1[fen2];
    P2=0xbf;
    delay(1);
    P2=0xff;
    P0=table1[fen3];
    P2=0x7f;
    delay(1);
    P2=0xff;
}
}

void main()
{
    TMOD=0x11;
    TH0=(65536-10)/256;
    TL0=(65536-10)%256;
    TH1=(65536-50000)/256;
    TL1=(65536-50000)%256;
    EA=1;
    ET0=1;
    TR0=1;
    ET1=1;
    TR1=1;
    ALE=0;
    START=0;
    OE=0;
    while(1)
    {
         ALE=1;
        START=0;
        _nop_();
        START=1;
        ALE=0;
        START=0;
        display(ge,fen1,fen2,fen3);
        while(EOC==0);
        P1=0xff;
        OE=1;
        x=P1;
        shu=x*196;
        ge=(shu*5)/100000;
        fen1=(shu*5)/10000%10;
        fen2=(shu*5)/1000%10;
        fen3=(shu*5)/100%10;
    }
}
void time() interrupt 1
{
    TH0=(65536-10)/256;
    TL0=(65536-10)%256;
    CLOCK=~CLOCK;
}
void time2() interrupt 3
{
    TH1=(65536-50000)/256;
    TL1=(65536-50000)%256;
    j++;
    if(j>59)
    {
        j=0;
        jia++;
        if(jia%2==0)
        A=B1=C=0;
        if(jia%2!=0)
         {
             B1=C=0;
             A=1;
         }
    }
}