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#include<reg51.h>
#include <intrins.h>
sbit w1=P1^4;
sbit w2=P1^5;
sbit w3=P1^6;
sbit w4=P1^7;
sbit OE=P1^0;
sbit EOC=P1^1;
sbit ST=P1^2;
sbit CLOCK=P1^3;
sbit a=P0^0;
sbit b=P0^1;
sbit c=P0^2;
unsigned char code table1[]={0x40,0x79,0x24,0x30,0x19,0x12};/*帶小數(shù)點的數(shù)字0~5*/
unsigned char code table2[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};//共陽數(shù)碼管0~9編碼
unsigned char vdata;
void zhongduan()
{
a=0;
b=0;
c=0;//選擇通道0
TMOD=0x02;
TH0=256-50;
TL0=256-50;
EA=1;ET0=1;
TR0=1;
}
void delay()
{unsigned char i,j;
for(i=0;i<10;i++)
for(j=0;j<50;j++);}
void convert(unsigned char vdata)//數(shù)碼管的動態(tài)顯示
{
P2=table1[vdata*196/10000];/*小數(shù)點前一位數(shù)字顯示 */
w1=1;
delay();
w1=0;
P2=table2[vdata*196/1000%10]; //小數(shù)點后一位
w2=1;
delay();
w2=0;
P2=table2[vdata*196/100%10];//小數(shù)點后兩位
w3=1;
delay();
w3=0;
P2=table2[vdata*196/10%10]; //小數(shù)點后三位
w4=1;
delay();
w4=0;
}
void main()
{
unsigned char vdata;
zhongduan();
while(1)
{
ST=0;
_nop_();
ST=1;
_nop_();
ST=0;
_nop_(); //構(gòu)造上升下降沿，啟動AD轉(zhuǎn)換器
while(EOC==0); //等待ad轉(zhuǎn)換結(jié)束
OE=1;//數(shù)據(jù)送至out口
_nop_();
vdata=P3;//將數(shù)據(jù)值賦給變量vdata
convert(vdata);//將轉(zhuǎn)換的數(shù)據(jù)通過數(shù)碼管顯示所得數(shù)字
delay();
OE=0;
}}
void time0_int()interrupt 1 //中斷服務(wù)子程序，產(chǎn)生時鐘脈沖，將模擬信號轉(zhuǎn)換為數(shù)字信號
{
CLOCK=~CLOCK;
}

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