/*******************************************************
This program was created by the
CodeWizardAVR V2.60 Evaluation
Automatic Program Generator
© Copyright 1998-2012 Pavel Haiduc, HP InfoTech s.r.l.
http://www.hpinfotech.com
Project : Réalisation d'un régulateur de température pour un réfrigérateur V2
Version : V1
Date    : 18/03/2013
Author  : Benoît GOUJON
Company : 
Comments: 
Chip type               : ATmega8535
Program type            : Application
AVR Core Clock frequency: 16,000000 MHz
Memory model            : Small
External RAM size       : 0
Data Stack size         : 128
*******************************************************/

#include <mega8535.h>
#include <stdio.h>
#include <delay.h>

// Alphanumeric LCD functions

#include <alcd.h>

// Declare your global variables here

#define ADC_VREF_TYPE ((0<<REFS1) | (0<<REFS0) | (0<<ADLAR))

// Read the AD conversion result

unsigned int read_adc(unsigned char adc_input)

{
ADMUX=adc_input | ADC_VREF_TYPE;

// Delay needed for the stabilization of the ADC input voltage
delay_us(10);

// Start the AD conversion
ADCSRA|=(1<<ADSC);

// Wait for the AD conversion to complete

while ((ADCSRA & (1<<ADIF))==0);
ADCSRA|=(1<<ADIF);
return ADCW;
}

void main(void)
{
// Declare your local variables here

unsigned int Valeur1 , Valeur2 , a , i, Teta, Consigne, S ;
unsigned char Tampon[20];

// Input/Output Ports initialization
// Port A initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=Out Bit1=In Bit0=In 

DDRA=(0<<DDA7) | (0<<DDA6) | (0<<DDA5) | (0<<DDA4) | (0<<DDA3) | (1<<DDA2) | (0<<DDA1) | (0<<DDA0);

// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=0 Bit1=T Bit0=T 

PORTA=(0<<PORTA7) | (0<<PORTA6) | (0<<PORTA5) | (0<<PORTA4) | (0<<PORTA3) | (0<<PORTA2) | (0<<PORTA1) | (0<<PORTA0);
// Port B initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In 

DDRB=(0<<DDB7) | (0<<DDB6) | (0<<DDB5) | (0<<DDB4) | (0<<DDB3) | (0<<DDB2) | (0<<DDB1) | (0<<DDB0);

// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T 

PORTB=(0<<PORTB7) | (0<<PORTB6) | (0<<PORTB5) | (0<<PORTB4) | (0<<PORTB3) | (0<<PORTB2) | (0<<PORTB1) | (0<<PORTB0);

// Port C initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In 

DDRC=(0<<DDC7) | (0<<DDC6) | (0<<DDC5) | (0<<DDC4) | (0<<DDC3) | (0<<DDC2) | (0<<DDC1) | (0<<DDC0);

// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T 

PORTC=(0<<PORTC7) | (0<<PORTC6) | (0<<PORTC5) | (0<<PORTC4) | (0<<PORTC3) | (0<<PORTC2) | (0<<PORTC1) | (0<<PORTC0);

// Port D initialization
// Function: Bit7=In Bit6=In Bit5=In Bit4=In Bit3=In Bit2=In Bit1=In Bit0=In 

DDRD=(0<<DDD7) | (0<<DDD6) | (0<<DDD5) | (0<<DDD4) | (0<<DDD3) | (0<<DDD2) | (0<<DDD1) | (0<<DDD0);

// State: Bit7=T Bit6=T Bit5=T Bit4=T Bit3=T Bit2=T Bit1=T Bit0=T 

PORTD=(0<<PORTD7) | (0<<PORTD6) | (0<<PORTD5) | (0<<PORTD4) | (0<<PORTD3) | (0<<PORTD2) | (0<<PORTD1) | (0<<PORTD0);

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=0xFF
// OC0 output: Disconnected

TCCR0=(0<<WGM00) | (0<<COM01) | (0<<COM00) | (0<<WGM01) | (0<<CS02) | (0<<CS01) | (0<<CS00);
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer1 Stopped
// Mode: Normal top=0xFFFF
// OC1A output: Disconnected
// OC1B output: Disconnected
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off

TCCR1A=(0<<COM1A1) | (0<<COM1A0) | (0<<COM1B1) | (0<<COM1B0) | (0<<WGM11) | (0<<WGM10);
TCCR1B=(0<<ICNC1) | (0<<ICES1) | (0<<WGM13) | (0<<WGM12) | (0<<CS12) | (0<<CS11) | (0<<CS10);
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer2 Stopped
// Mode: Normal top=0xFF
// OC2 output: Disconnected

ASSR=0<<AS2;
TCCR2=(0<<WGM20) | (0<<COM21) | (0<<COM20) | (0<<WGM21) | (0<<CS22) | (0<<CS21) | (0<<CS20);
TCNT2=0x00;
OCR2=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization

TIMSK=(0<<OCIE2) | (0<<TOIE2) | (0<<TICIE1) | (0<<OCIE1A) | (0<<OCIE1B) | (0<<TOIE1) | (0<<OCIE0) | (0<<TOIE0);

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off

MCUCR=(0<<ISC11) | (0<<ISC10) | (0<<ISC01) | (0<<ISC00);
MCUCSR=(0<<ISC2);

// USART initialization
// USART disabled

UCSRB=(0<<RXCIE) | (0<<TXCIE) | (0<<UDRIE) | (0<<RXEN) | (0<<TXEN) | (0<<UCSZ2) | (0<<RXB8) | (0<<TXB8);

// Analog Comparator initialization
// Analog Comparator: Off

ACSR=(1<<ACD) | (0<<ACBG) | (0<<ACO) | (0<<ACI) | (0<<ACIE) | (0<<ACIC) | (0<<ACIS1) | (0<<ACIS0);

// ADC initialization
// ADC Clock frequency: 1000,000 kHz
// ADC Voltage Reference: AREF pin
// ADC High Speed Mode: Off
// ADC Auto Trigger Source: ADC Stopped

ADMUX=ADC_VREF_TYPE;
ADCSRA=(1<<ADEN) | (0<<ADSC) | (0<<ADATE) | (0<<ADIF) | (0<<ADIE) | (1<<ADPS2) | (0<<ADPS1) | (0<<ADPS0);
SFIOR=(1<<ADHSM) | (0<<ADTS2) | (0<<ADTS1) | (0<<ADTS0);

// SPI initialization
// SPI disabled

SPCR=(0<<SPIE) | (0<<SPE) | (0<<DORD) | (0<<MSTR) | (0<<CPOL) | (0<<CPHA) | (0<<SPR1) | (0<<SPR0);
// TWI initialization
// TWI disabled

TWCR=(0<<TWEA) | (0<<TWSTA) | (0<<TWSTO) | (0<<TWEN) | (0<<TWIE);

// Alphanumeric LCD initialization
// Connections are specified in the
// Project|Configure|C Compiler|Libraries|Alphanumeric LCD menu:
// RS - PORTC Bit 7
// RD - PORTC Bit 6
// EN - PORTC Bit 5
// D4 - PORTC Bit 4
// D5 - PORTC Bit 2
// D6 - PORTC Bit 1
// D7 - PORTC Bit 0
// Characters/line: 16

lcd_init(16);
while (1)
      {
        S = 0 ;
        for (a = 0 ; a<100 ; a ++)
        {
            i = read_adc (3) ; // Lis la tension du capteur de température et la convertie en numérique
            S = S + i ;         
        }
        Valeur1 = S/100 ;
        Teta = (int) (Valeur1*0.4882); // Conversion du numérique vers des degrés 
        delay_ms (200);
         
        Valeur2 = read_adc (0) ; // Lis la tension du potentiomètre de commande et la convertie en numérique
        Consigne = (int) (Valeur2*0.030);// Conversion du numérique vers des degrés tout réglant la sensibilité du potantiomètre pour 30°C 
        
	if (Consigne > 30) 
        
                Consigne = 30 ; // On bloque la valeur de consigne à 30°C
                
        sprintf (Tampon, "Il fait :") ;
	lcd_gotoxy(0,0);
        lcd_puts (Tampon) ;		//On affiche la valeur de i.
        
	sprintf (Tampon, "          %4d C", Teta) ;
	lcd_gotoxy(0,1);
        lcd_puts (Tampon) ;		//On affiche la valeur de i.
        
	sprintf(Tampon,"Vous voulez :");
	lcd_gotoxy (0,2);
        lcd_puts(Tampon); 		//On affiche la valeur de j.
        
	sprintf(Tampon,"          %4d C",Consigne);
	lcd_gotoxy (0,3);
        lcd_puts(Tampon); 		//On affiche la valeur de j.
        
	if (Teta>=Consigne+1) 	//Si la température est plus élévé que 3°C
	PORTA.2 = 1 ;                   //Frigo en marche
        
	if (Teta<=Consigne-1)		//Sinon
        PORTA.2 = 0 ;                   //Frigo à l'arret
}
}