ADC0832的使用

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#ifndef _IODEF_H_
#define _IODEF_H_

#include<REG52.H>
#include <INTRINS.H>
#include <ABSACC.H>

#define uchar unsigned char
#define uint unsigned int

#define segA P1_4
#define segB P1_5					//用74HC139节省IO资源
#define LED P1_1
sbit P0_0 = P0^0;
sbit P0_1 = P0^1;
sbit P0_2 = P0^2;
sbit P0_3 = P0^3;
sbit P0_4 = P0^4;
sbit P0_5 = P0^5;
sbit P0_6 = P0^6;
sbit P0_7 = P0^7;

sbit P1_0 = P1^0;
sbit P1_1 = P1^1;
sbit P1_2 = P1^2;
sbit P1_3 = P1^3;
sbit P1_4 = P1^4;
sbit P1_5 = P1^5;
sbit P1_6 = P1^6;
sbit P1_7 = P1^7;

sbit P2_0 = P2^0;
sbit P2_1 = P2^1;
sbit P2_2 = P2^2;
sbit P2_3 = P2^3;
sbit P2_4 = P2^4;
sbit P2_5 = P2^5;
sbit P2_6 = P2^6;
sbit P2_7 = P2^7;

sbit P3_0 = P3^0;
sbit P3_1 = P3^1;
sbit P3_2 = P3^2;
sbit P3_3 = P3^3;
sbit P3_4 = P3^4;
sbit P3_5 = P3^5;
sbit P3_6 = P3^6;
sbit P3_7 = P3^7;

#endif

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#ifndef _MAIN_H
#define _MAIN_H
/*--------------------------------------------*/

#include "iodefine.h"				//自定义内容

/*--------------------------------------------*/
#define DELAY
#define ADC0832

/*--------------------------------------------*/
#ifdef DELAY
#define DELAY_MS_US
void delay_ms(uint xms);
void delay_us(uint Xus);
#endif

/*--------------------------------------------*/
#ifdef ADC0832

void start_ADC0832(void);					//启动0832以及设置采样方式
uchar getADC0832_DO(void);					//返回采样电压值0-5v
void ADC_dataProcess(uchar);				//ADC0832采样数据处理,存放在ADC_data[4]中
void ADC_seg7display();						//及显示在数码管
#endif

/*--------------------------------------------*/
#endif

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#include"main.h"

#ifdef DELAY_MS_US
void delay_ms(uint xms)	
{
    uint loop;
    for (loop = 0; loop < xms; loop++)
    {
        /* 1ms_code 误差	+0.306315ms/2000ms */
        uchar i, j;
        _nop_();
		i = 2;
		j = 195;
		do
		{
			while (--j);
		} while (--i);
    }
}
/*--------------------------*/
void delay_us(uint Xus)
{
  uint i,j;
  for(i=0;i<8;i++){
     for(j=0;j<Xus;j++){
         _nop_();
     }
  }
}
#endif

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#include "main.h"
#ifdef ADC0832

extern uchar code SEG7_yin[];
static uint ADC_data[4] = {0};		//存放采样数据的各个位，便于数码管显示
#define	CS_LOW  P1_7 		//ADCS
#define CLK P3_4			//ADCLK
#define DI_DO P1_6			//DIO
#define led P1_1

void start_ADC0832()
{
	CS_LOW = 1;
	CLK = 0;
	delay_us(2);			//未上电//第零个周期
	CS_LOW = 0;

	CLK = 0;
	DI_DO = 1;				//START//第一个周期
	delay_us(2);
	CLK = 1;
	delay_us(2);

	CLK = 0;
	DI_DO = 0;				//DIF差分输入方式//第二个周期
	delay_us(2);
	CLK = 1;
	delay_us(2);

	CLK = 0;
	DI_DO = 0;				//CH0 +  CH1 - //第三个周期
	delay_us(2);
	CLK = 1;
	delay_us(2);

	CLK = 0;
	DI_DO = 1;
	delay_us(2);			//MUX SETTING TIME

}
uchar getADC0832_DO(void)	//返回采样电压值
{
	uchar i,dat = 0,redat = 0;
	for ( i = 0; i < 8; i++)
	{
		CLK = 1;
		delay_us(2);
		CLK = 0;
		delay_us(2);
		dat  = (dat << 1)|(uchar)DI_DO;
	}
	for ( i = 0; i < 8; i++)
	{
		redat = redat | ((uchar)DI_DO << i);
		CLK = 1;
		delay_us(2);
		CLK = 0;
		delay_us(2);
	}
	CS_LOW = 1;						//使能端禁止
	
	return (dat == redat)? dat : 0;	//校验正确则输出	
		
}

void ADC_dataProcess(uchar beforeDat)
{
	uint afterDat,qian,bai,shi,ge;
	
	afterDat = (double)beforeDat / 51 * 1000;
	qian = 	afterDat / 1000;
	bai =  (afterDat % 1000) / 100;
	shi = (afterDat % 100) / 10;
	ge =  afterDat % 10;
	ADC_data[0] = qian;
	ADC_data[1] = bai;
	ADC_data[2] = shi;
	ADC_data[3] = ge; 

}

void ADC_seg7display()
{
	P0 = 0;
	P0 = SEG7_yin[ADC_data[0]]+0x80;
	//P0 = SEG7_yin[0];
	segB = 0;
	segA = 0;
	delay_us(100);

	P0 = 0;
	P0 = SEG7_yin[ADC_data[1]];
	//P0 = SEG7_yin[1];
	segB = 0;
	segA = 1;
	delay_us(100);
	
	P0 = 0;
	P0 = SEG7_yin[ADC_data[2]];
	//P0 = SEG7_yin[2]; 
	segB = 1;
	segA = 0;
	delay_us(100);
	
	P0 = 0;
	P0 = SEG7_yin[ADC_data[3]];
	//P0 = SEG7_yin[3];
	segB = 1;
	segA = 1;
	delay_us(100);
}

#endif

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#include "main.h"
uchar code SEG7_yin[]= {
    0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f
};
void main(){

	start_ADC0832();
	ADC_dataProcess(getADC0832_DO());
	   while(1){
		ADC_seg7display();
		}
}