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標(biāo)題: 單片機(jī)ADC0804采樣代碼 [打印本頁]

作者: 吃掉大菠蘿 時(shí)間: 2022-5-29 13:33
標(biāo)題: 單片機(jī)ADC0804采樣代碼

#include<reg51.h>

#define uchar unsigned char

#define uint unsigned int

sbit wr=P3^6;

sbit rd=P3^7;

sbit cs=P3^5;

uchar code tab[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};//共陰數(shù)碼管碼表

uchar s,g,f,l,x;//數(shù)碼管顯示變量

float A;

uint K;

void delay(uint);

void adc();

void adc()

{

//啟動ADC0804采樣//

cs=0;wr=0;rd=1;

delay(50);

cs=1;wr=1;rd=1; //WR由低到高時(shí)，AD開始轉(zhuǎn)換

delay(100);

//讀AD數(shù)值//

cs=0;wr=1;rd=0;//讀取轉(zhuǎn)換數(shù)據(jù)結(jié)果

delay(50);

A=P1;//P1的新數(shù)據(jù)賦值給adval，用于數(shù)碼管顯示的s g f的分離

A=A*144/256;

K=P1*144/256;

cs=1;wr=1;rd=1;//停止AD讀取

}

void main()

{

uint s,g,f,l,x;

while(1)

{

adc();

s=K/10;

l=s/10;

x=s%10;

g=K%10;

f=(A-K)*10;

P2=0XFE; //11111110 選中十位數(shù)碼管

P0=tab[l]; //顯示

delay(50);

P2=0XFD; //11111110 選中十位數(shù)碼管

P0=tab[x]; //顯示

delay(50);

P2=0XFB; //11111101 選中個(gè)位數(shù)碼管

P0=tab[g]+0x80; //顯示

delay(50);

P2=0XF7;//11111011 選中小數(shù)點(diǎn)后數(shù)碼管

P0=tab[f]; //顯示

delay(50);

}

void delay(uint m)//延時(shí)子程序，約500個(gè)機(jī)器周期

{

while(m--);｝

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