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- 2019-4-2
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- 17 小时
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1金钱
这个是数码管显示 adc0809测量到的电流值,这个的测量范围是0到20MA,怎么改成0到200MA的量程啊?
下面是总程序:
#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 char 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;
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=1;
P21=0;
P22=0;
P23=0;
Delay(10);
P1=0xFF;
P1=~dispbitcode[dispbuf[2]];
P17=0;
P20=0;
P21=1;
P22=0;
P23=0;
Delay(10);
P1=0xFF;
P1=~dispbitcode[dispbuf[1]];
P20=0;
P21=0;
P22=1;
P23=0;
Delay(10);
P1=0xFF;
P1=~dispbitcode[dispbuf[0]];
P20=0;
P21=0;
P22=0;
P23=1;
Delay(10);
P1=0xFF;
}
void main()
{
TimeInitial();
while(1)
{
ST=0;
OE=0;
ST=1;
ST=0;
while(EOC==0);
OE=1;
getdata=P0;
OE=0;
temp=getdata*1.0/255*20000;
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;
}
求大佬解答下,谢谢啦
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