【Proteus仿真】自动量程(范围＜10V)切换数字电压表

【Proteus仿真】自动量程(范围<10V)切换数字电压表

  • Proteus仿真
    在这里插入图片描述

示例程序代码

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#include<reg52.h>
unsigned char code dispbitcode[]= {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};//共阴数码管断码
unsigned char dispbuf[4];
unsigned int i;
unsigned int j;
unsigned int getdata;
unsigned int temp;
unsigned int temp1;
unsigned char count;
unsigned char d;
sbit ST=P2^4;
sbit OE=P2^5;
sbit EOC=P2^6;
sbit CLK=P2^7;
sbit ADD_A=P3^4;  //选择AD的输入端
sbit ADD_B=P3^5;
sbit ADD_C=P3^6;
sbit D0=P2^0;  //数码管的位控制端
sbit D1=P2^1;
sbit D2=P2^2;
sbit D3=P2^3;
sbit P17=P1^7;  //确定小数点的位置
sbit s1=P3^2;
sbit s2=P3^3;
#define \_v0\_5 {s1=1;s2=0;}
#define \_v10 {s1=0;s2=1;}


unsigned char m;

void TimeInitial();
void Delay(unsigned int i);

/\*定时器1初始化函数\*/
void TimeInitial()
{   TMOD=0x10;
    TH1=(65536-200)/256;
    TL1=(65536-200)%256;
    EA=1;
    ET1=1;
    TR1=1;
}
/\*延时函数\*/
void Delay(unsigned int i)
{
    unsigned int j;
    for(; i>0; i--)
    {
        for(j=0; j<125; j++)
        {;}
    }
}
/\*数码管显示函数\*/
void Display()
{
    P1=dispbitcode[dispbuf[3]];

    D0=0;
    D1=1;
    D2=1;
    D3=1;
    Delay(10);
    P1=0x00;

    P1=dispbitcode[dispbuf[2]];
    if(m==2)
    {
        P17=1;
    }
    D0=1;
    D1=0;
    D2=1;
    D3=1;
    Delay(10);
    P1=0x00;
    P1=dispbitcode[dispbuf[1]];
    if(m==10)
    {
        P17=1;
    }
    D0=1;
    D1=1;
    D2=0;
    D3=1;
    Delay(10);
    P1=0x00;
    P1=dispbitcode[dispbuf[0]];
    D0=1;
    D1=1;
    D2=1;
    D3=0;
    Delay(10);
    P1=0x00;
}
void main()
{
    TimeInitial();
    ADD_A=0;
    ADD_B=0;
    ADD_C=0;
    _v10;
    m=2;
    while(1)
    {


        ST=0;
        OE=0;
        ST=1;
        ST=0;
        while(EOC==0);
        OE=1;
        getdata=P0;
        OE=0;
        if ((s1==0) && (s2==1) && (getdata<6))
        {
            ADD_A=1;
            _v0_5;

            m=10;
        }
        else if	((s1==1)&&(s2==0) && (getdata>254))
        {
            ADD_A=0;
            _v10;

            m=2;
        }


        temp=(getdata\*1.0/255)\*500\*m;
        dispbuf[0]=temp%10;
        dispbuf[1]=temp/10%10;
        dispbuf[2]=temp/100%10;
        dispbuf[3]=temp/1000;
        Display();

    }
}

void t1(void) interrupt 3 using 0
{
    TH1=(65536-200)/256;
    TL1=(65536-200)%256;
    CLK=~CLK;
}

仿真资源和程序源码

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链接：https://pan.baidu.com/s/12-rNBvoMRujGYpEN550fEQ 
提取码：986e