量程自动切换数字电压表proteus仿真+单片机程序资料

ID:287880 · 发表于 2018-3-12 19:09

量程自动切换数字电压表proteus仿真+程序资料

仿真原理图如下（proteus仿真工程文件可到本帖附件中下载）

单片机源程序如下:

#include<reg52.h>
unsigned char code dispbitcode[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
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=P3^0;
sbit OE=P3^1;
sbit EOC=P3^2;
sbit CLK=P3^3;
sbit P34=P3^4;
sbit P35=P3^5;
sbit P36=P3^6;
sbit P20=P2^0;
sbit P21=P2^1;
sbit P22=P2^2;
sbit P23=P2^3;
sbit P17=P1^7;
//sbit s3=P2^7; //位定义，控制模拟开关
sbit s2=P2^6;
sbit s1=P2^5;
#define _v10 {s1=1;s2=0;}
#define _v20 {s1=0;s2=1;}
unsigned char m;
void TimeInitial();
void Delay(unsigned int i);
void TimeInitial()
{ TMOD=0x10;
TH1=(65536-200)/256;
TL1=(65536-200)%256;
EA=1;
ET1=1;
TR1=1;
}
void Delay(unsigned int i)
{
unsigned int j;
for(;i>0;i--)
{
for(j=0;j<125;j++)
{;}
}
}
void Display()
{
P1=dispbitcode[dispbuf[3]];
P20=0;
P21=1;
P22=1;
P23=1;
Delay(10);
P1=0x00;
P1=dispbitcode[dispbuf[2]];
P17=1;
P20=1;
P21=0;
P22=1;
P23=1;
Delay(10);
P1=0x00;
P1=dispbitcode[dispbuf[1]];
P20=1;
P21=1;
P22=0;
P23=1;
Delay(10);
P1=0x00;
P1=dispbitcode[dispbuf[0]];
P20=1;
P21=1;
P22=1;
P23=0;
Delay(10);
P1=0x00;
}
void main()
{
TimeInitial();
P34=0;
P35=0;
P36=0;
_v20;
m=4;
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<128)
{
_v10;
m=2;
}
else if( s1==1&&s2==0&& getdata>254)
{
_v20;
m=4;
}
temp=(getdata*1.0/255)*500*m;
……………………
…………限于本文篇幅余下代码请从51黑下载附件…………