Carbon Monoxide Sensor

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

* Test configuration:
MCU: LPC2129
Dev.Board: LPC2129 mini
Oscillator: 12 MHz
Software: Keil uVision3

*/

#include<stdio.h>
#include"lpc21xx.h" // header file
#include<string.h>
//*******************************************************************
void SEND_CMD_2_LCD(unsigned char); // function protoype
void SEND_2_LCD(unsigned char *, unsigned char);
void DISPLAY_ON_LCD(unsigned char DATA);

#define sw4 0x00010000

void DELAY(void);
void LCD_DELAY(void);

unsigned int LCD_RS=0X01000000; // pin declerations
unsigned int LCD_EN=0X02000000;
unsigned int LCD_DATA_LINES=0X00003C00;
unsigned char da,da1,da2;

//*******************************************************************
int main()
{
unsigned char LCD_CMD[]={0X20,0X28,0X0f,0X06,0X01,0X80},COUNT; // LCD commands

IODIR0|=LCD_DATA_LINES;
IODIR1=0X03300000;

for(COUNT=0;COUNT<6;COUNT++)
SEND_CMD_2_LCD(LCD_CMD[COUNT]); // LCD INIT function call

DELAY();
DELAY();

while(1)
{

if((IOPIN1&sw4)==sw4)
{
SEND_CMD_2_LCD(0x01); // clear the display
SEND_2_LCD("CARBON ACTIVATED",0x80); // display on ist lne
DELAY();
}
else // IR IS low enter the loop
{
SEND_CMD_2_LCD(0x01); // clear the display
SEND_2_LCD("CARBON DEACTIVATED",0x80); // display on ist lne
DELAY();
}


}
}

void DELAY(void)
{
unsigned int X=800000;
while(X--);
}


void LCD_DELAY(void)
{
unsigned int X=20000; // delay calculation subroutine
while(X--);
}

void SEND_CMD_2_LCD(unsigned char DATA)
{
unsigned int TEMP; // LCD command write function
IOCLR0=LCD_DATA_LINES;
TEMP=DATA;
TEMP=((TEMP&0xf0)<<6);
IOCLR1=LCD_RS;
IOSET0=TEMP;
IOSET1=LCD_EN;
LCD_DELAY();
LCD_DELAY();
IOCLR1=LCD_EN;
IOCLR0=LCD_DATA_LINES;

LCD_DELAY();

TEMP=DATA;
TEMP=((TEMP&0x0f)<<10);
IOCLR1=LCD_RS;
IOSET0=TEMP;
IOSET1=LCD_EN;
LCD_DELAY();
LCD_DELAY();
IOCLR1=LCD_EN;
IOCLR0=LCD_DATA_LINES;
}

void DISPLAY_ON_LCD(unsigned char DATA)
{
unsigned int TEMP;
IOCLR0=LCD_DATA_LINES;
TEMP=DATA; //LCD data write function
TEMP=((TEMP&0xf0)<<6);
IOSET1=LCD_RS;
IOSET0=TEMP;
IOSET1=LCD_EN;
LCD_DELAY();
LCD_DELAY();
IOCLR1=LCD_EN;
IOCLR0=LCD_DATA_LINES;

LCD_DELAY();

TEMP=DATA;
TEMP=((TEMP&0x0f)<<10);
IOSET1=LCD_RS;
IOSET0=TEMP;
IOSET1=LCD_EN;
LCD_DELAY();
LCD_DELAY();
IOCLR1=LCD_EN;
IOCLR0=LCD_DATA_LINES;
}

void SEND_2_LCD(unsigned char *PTR, unsigned char POS)
{
SEND_CMD_2_LCD(POS);
while(*PTR)
{ // sending the data to LCD data line function
DISPLAY_ON_LCD(*PTR);
PTR++;
}
LCD_DELAY();
LCD_DELAY();
}