ADC0809做AD轉(zhuǎn)換的C程序

1、ADC0809做AD轉(zhuǎn)換的C程序#include<reg52.h>unsigned char code dispbitcode=0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f;unsigned char dispbuf4;unsigned int i;unsigned int j;unsigned char getdata;unsigned int temp;unsigned int temp1;unsigned char count;unsigned char d;sbit ST=P30;sbit OE=P31;sbit EOC

2、=P32;sbit CLK=P33;sbit P34=P34;sbit P35=P35;sbit P36=P36;sbit P20=P20;sbit P21=P21;sbit P22=P22;sbit P23=P23;sbit P17=P17;void TimeInitial();void Delay(unsigned int i);/void TimeInitial() TMOD=0x10; TH1=(65536-200)/256;/定時(shí)時(shí)間為2us,亦即CLK周期為0.4us TL1=(65536-200)%256; EA=1; ET1=1; TR1=1; void Delay(unsig

3、ned int i)/延時(shí)函數(shù) unsigned int j; for(;i>0;i-) for(j=0;j<125;j+) ; void Display()/ P1=dispbitcodedispbuf3;/十位 P20=0; P21=1; P22=1; P23=1; Delay(10); P1=0x00; P1=dispbitcodedispbuf2;/個(gè)位 P17=1;/顯示小數(shù)點(diǎn) P20=1; P21=0; P22=1; P23=1; Delay(10); P1=0x00; P1=dispbitcodedispbuf1;/十分位 P20=1; P21=1; P22=0; P

4、23=1; Delay(10); P1=0x00; P1=dispbitcodedispbuf0;/百分位 P20=1; P21=1; P22=1; P23=0; Delay(10); P1=0x00;void main()/主函數(shù) TimeInitial(); while(1) ST=0;/關(guān)閉轉(zhuǎn)換 OE=0;/關(guān)閉輸出 ST=1;/開啟轉(zhuǎn)換 ST=0;/關(guān)閉轉(zhuǎn)換 P34=0;/選擇通道0 P35=0; P36=0; while(EOC=0);/判斷是否轉(zhuǎn)換結(jié)束:是則執(zhí)行以下語句,否則等待 OE=1;/開啟數(shù)據(jù)輸出允許 getdata=P0;/將數(shù)據(jù)取走,存放在變量getdata中 OE=0;/關(guān)閉輸出 temp=getdata*1.0/255*500;/電壓值轉(zhuǎn)換,5V作為參考電壓,分成256份 dispbuf0=temp%10;/百分位 dispbuf1=temp/10%10;/十分位 dispbuf2=temp/100%10;/個(gè)位 dispbuf3=temp/1000;/十位 Display(); void t1(void) interrupt 3 using 0