/*

Chuong trinh doc lien tuc gia tri dien the tai kenh 1 cua ADC va hien thi len man hinh

*/

#include "stdafx.h"

#include <conio.h>

#include <stdio.h>

#include <math.h>

#include <dos.h>

#include <PCIXP.h>

#define pi 3.14143

void main()

{

int add=Get_Addr("PCI_ADC");

int ADC_H, ADC_L,value,voltage;

printf("

\t\tChuong trinh demo ADC, su dung kenh CH1

.");

while(!kbhit())

{

outportb(add,0x01); // Chon kenh CH1

outportb(add+1,0x00); // Select software trigger method

outportb(add+1,0x10); // Set TRI bit

outportb(add+1,0x00); // Clear TRI to start conversion

Sleep(20); // wait for >= 50us to finish conversion

ADC_L = inportb(add); // Byte thap

ADC_H = inportb(add+1); // Byte cao

value = (ADC_L&0xff) | (ADC_H<<8);

value = value&0xfff;

voltage = (value * 20)/4095 - 10;

printf("\rGia tri dien ap doc duoc la: %5d Vol", voltage);

//Sleep(100);

}

}