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IR ATMEL CODE

 

/*
* Project name:
IR sensor
* Copyright
(c) Researchdesignlab.com
* Description:

* Test configuration:
MCU: AT89S52
Dev.Board: 8051
Oscillator: 11.0592 MHz
Software: Keil uVision3

*/


#include<reg51.h>

#define LCD_PORT P2 // LCD D0-D7 PINS connected P2
sbit rs=P3^5; // LCD RS PIN connected P3.5
sbit en=P3^7; // LCD EN PIN connected P3.7
sbit D7=P2^7;
sbit rw=P3^6; // LCD RW PIN connected P3.6

sbit IR=P1^0; // IR sensor PIN connected P1.0

 

void busy(); //LCD busy
void CMD_WRT(unsigned char); //To write the commands to the LCD
void DATA_WRT(unsigned char); //To write the data to the LCD
void LCD_WRT(unsigned char *);
void DELAY();


void main()
{
unsigned char CMD[]={0x38,0x01,0x0f,0x06,0x80},TEMP1,i;

for(i=0;i<5;i++)
{
TEMP1=CMD[i]; //write the commands to the LCD
CMD_WRT(TEMP1);
}

while(1)
{
if(IR==1) //IR is high enter the loop
{
CMD_WRT(0X01); // LCD clear cmd
CMD_WRT(0X80); // LCD 1st line cmd
LCD_WRT("IR HIGH"); // Display the data on LCD
DELAY();
}
else //IR is low enter the loop
{
CMD_WRT(0X01); // LCD clear cmd
CMD_WRT(0X80); // LCD 2nd line cmd
LCD_WRT("IR LOW"); // Display the data on LCD
DELAY();
}
}


}


void DELAY()
{ //delay of 3ms
unsigned int X=800000;
while(X--);
}


void busy()
{
D7=1;
rs=0; //cmd mode
rw=1; //read
while(D7!=0) //wait till LCD is ready
{
en=0;
en=1; // low to high latch
}
}



void CMD_WRT(unsigned char val)
{
busy();
LCD_PORT=val; //write cmd to P2
rs=0; //cmd mode
rw=0; //write
en=1;
en=0; //high to low latch
}


void DATA_WRT(unsigned char ch)
{
busy();
LCD_PORT = ch; //write cmd to P2
rs=1; //data mode
rw=0; //write
en=1;
en=0; //high to low latch
}

void LCD_WRT(unsigned char *string)
{
while(*string)
DATA_WRT(*string++);
}

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