主要用到的芯片如下：AT89C51,74LS245,TLC2543,LED数码管
量程0-5v，精确到小数点后三位，
数字电压表.zip
(81.16 KB, 下载次数: 38)
分享给论坛里的朋友
部分程序如下，需要完整的请从附件下载
#include "led.h"
#include "TLC2543.h"
const uchar code displayMode=0x0f;
uchar displayBuff[4]={0x7e,0x7e,0x7e,0x7e}; //数码管显示缓冲区，低两位为时间，最高位为抢答号
const uchar code digitalNumber[10]={0x7e,0x06,0x6d,0x79,0x33,0x5b,0x5f,0x70,0x7f,0x73};
void main()
{
uint voltageReadTemp;
uint voltageRead;
uchar temp;
uchar i,j;
init_led();
while(1)
{
ledSweepDisplay(displayBuff,displayMode,4);
voltageRead=read_TLC2543(0x05);
voltageRead=voltageRead*0x05;
for(i=4;i>0;i--)
{
temp=(uchar)(voltageRead/0x0fff);
if(i==4)
displayBuff[i-1]=digitalNumber[temp]|0x80;
else
displayBuff[i-1]=digitalNumber[temp];
voltageRead=voltageRead%0x0fff;
voltageReadTemp=voltageRead<<1;
voltageRead=0x0000;
for(j=0;j<5;j++)
voltageRead+=voltageReadTemp;//voltageRead=voltageRead*10
}
}
}
|
