ADC Interfacing with 8051

ADC Interfacing with 8051


Read the Introduction here for the ADC  tutorials .   For LCD tutorials Click here

Both the above two tutorials combined  and  tried to read the adc value and Displaying the value in 16x2 LCD only for the learning purpose . If you have any doubt ask me By emailing thnnara123@gmail.com ,or comment below .


 Circuit 



Program In written Keil  with C compiler 
**********************************************************************************
Main file // ADC File
***********************************************************************************
#include <REGX51.H>  
#include "lcd.h" 
#include"adc.h"
#define test_port P2
#include<stdio.h>

void main(){
unsigned char buffer[8];

int adc_value;
LCDPORT = 0x00;
adc_port = 0xFF;
test_port =0x00;
lcd_init();
string("adc ");
get_adc();
P2 = adc_port;
adc_value = 0x60;//adc_port;
LINE2
sprintf(buffer,"%d",adc_value);   // used to convert Binary value from ADC to ASCI value for Lcd

string(buffer);

while(1);

}

***********************************************************************************
    adc.h // ADC Header File
************************************************************************************
#define adc_port P3
sbit RD_adc = P1^0;
sbit WR_adc = P1^1;
sbit INTR = P1^2; 

 get_adc()
 { 
  
 WR_adc = 0;
 delay(1);
 WR_adc =1;
 while(INTR==1);
 RD_adc = 1;
 delay(1);
 RD_adc = 0;

  }
**********************************************************************************
LCD.h // LCD Header File
***********************************************************************************
 #include"delay.h"
 #define LCDPORT P0  // named the Port2 as LCDPORT
 sbit RS=LCDPORT^2;  // P2.2 named RS
 sbit E=LCDPORT^3;  // P2.3 named as E
 #define LINE2 lcd_cmd(0xc0);   // used to display the second line oxc0 is 
 
 
 void latch(void)  // used to a high to low pulse the pin E 
{
    E = 1;
    delay(1);
    E = 0;
}

void lcd_cmd(unsigned char c)   // used to send the command / Instruction to the lcd port 
{          
RS = 0;    // send a '0' value to select to send command
delay(1);     
LCDPORT = c & 0xf0;  //  send  the command c only 4 bit by masking the lower bit 
latch();
delay(1); 
LCDPORT =  (c << 4); // giving the lowerbit  by shifting the 4 bit to left 
latch(); 
}

 void lcd_data(unsigned char c)
 {
 RS =1;    // send 1 to send data 
 delay(1);
LCDPORT = c & 0xf0 | 0x4; //send  the data  only  4 bit by masking the lower bit and also making the RS pin high by giving 0x04 .
delay(1);
latch();

LCDPORT = (c << 4)| 0x4; ; // giving the lower bit  by shifting the 4 bit to left 
latch(); 
}
 
void lcd_init()
{
  delay(20);
    lcd_cmd(0x30);  //as per data sheet
  delay(20);
    lcd_cmd(0x30);    //as per data sheet
  delay(4);
    lcd_cmd(0x32);    //as per data sheet
 delay(4);
    lcd_cmd(0x28);            // Function set (4-bit interface, 2 lines, 5*7Pixels)
    lcd_cmd(0x28);            // Function set (4-bit interface, 2 lines, 5*7Pixels)
    lcd_cmd(0x0c);            // Make cursorinvisible
    lcd_cmd(0x6);            // Set entry Mode(auto increment of cursor)
}

 void string(const char *q)    // used to send single charcter to display the lcd 
{
    while (*q) {
        lcd_data(*q++);
    }
}
***********************************************************************************
To download the Whole Project Click here

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