Embedded program code in C language

Note : Pin connection should be in according to code below. if any confusion then ask in comments below...

//PROJECT NAME:digital voltmeter

//PB 0=BUZZER

//PB1=LDR SENSOR

//PC2=SMOKE SENSOR

//PC0=ANALOG INPUT(TEMPERATURE SENSOR)

//PC3,PC4,PC5=E,RW,RS( 16X2 LCD)

//PD=DATA(16X2 LCD)

#define F_CPU 12000000UL //Setting F_CPU to the frequency of the microcontroller

#include <avr/io.h>

#include <avr/interrupt.h>

#include <util/delay.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

 

/*ADC Conversion Complete Interrupt Service Routine ()*/

ISR(ADC_vect);

////////////////////// ////////////////////////// ////////////////////////// ////

void InitADC()

{

    DDRC = 0b00111000;                    // Configure PortA as input

    ADMUX=(1<<REFS 0);                // For Aref=AVcc;

    ADCSRA=(1<<ADE N)|(7<<ADPS0);

}

int ReadADC(int ch)

{

   ch=ch&0b00000111 ;               //Select ADC Channel ch must be 0-7

   ADMUX|=ch;

   ADCSRA|=(1<<AD SC);               //Start Single conversion

   while(!(ADCSRA & (1<<ADIF))); &n bsp;  //Wait for conversion to complete

   ADCSRA|=(1<<AD IF);                   //Clear ADIF by writing one to it

   return(ADC);

}

////////////////////// ////////////////////////// //////////////////////////

#define SELECT_7SEG_DDR DDRC

#define SELECT_7SEG_PORT PORTC

#define DISP1 PC5

#define DISP2 PC4

#define DATA_DDR DDRD

#define DATA_PORT PORTD

char DECODE_7SEG[11] = {0x77,0x14,0xb3,0xb6,0xd4, 0xe6,0xe7,0x34,0xf7,0xf6,0 x08};

void DISPLAY_7SEG(int a)

{

SELECT_7SEG_DDR |= (1 << DISP1) | (1 << DISP2);

DATA_DDR = 0xff;   // port assigned as output

char char1;

char1 = a%10;

a = a/10;

char1 = DECODE_7SEG[char1];

SELECT_7SEG_PORT &= ~((1 << DISP1) | (1 << DISP2));

DATA_PORT = char1;

SELECT_7SEG_PORT |= (1 << DISP1);

char1 = a%10;

a = a/10;

char1 = DECODE_7SEG[char1];

SELECT_7SEG_PORT &= ~((1 << DISP1) | (1 << DISP2));

DATA_PORT = char1;

SELECT_7SEG_PORT |= (1 << DISP2);

}

int main()

{

DDRC &=~(1<<PC0);&nbs p;   //PC2=LOW INPUT FOR TEMPERATURE

DDRB|=0xFF;   ;          //Output for relays

PORTB = 0x00;        //INITIAL VALUE

InitADC();

unsigned int count;

while(1 )

    {

    int temp_int=ReadADC(0);     

    DISPLAY_7SEG(temp_in t/10);

 & nbsp;  for(count = 0; count<1000; count++)

        {

        DISPLAY_7SEG(temp_in t/10);

        }

     }

return 0;

}

For any query, feel free to comment below.....

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Embedded program code in C language