/* Voltmetre, on affiche la tension réglée grace à un potentiometre*/


#include<mega8535.h> 

#include<lcd.h>

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

interrupt[ADC_INT]void adc_isr(void);
void brdInit(void);

unsigned int tension;
// float tension;
unsigned char tampon[20];

void main (void)
{
        brdInit();
        #asm("sei")
        ADCSRA|=0x40;		//on lance une seule fois la conversion
        while(1)
        {  
        PORTD.5=1;           
        PORTD.5=0;           
        }                

}


void brdInit(void)
{

	#asm
	.equ __lcd_port=0x15
	#endasm
	lcd_init(16);

	lcd_clear();

	ADMUX=0b01000001;  // AVCC with external capacitor at AREF pin
	                   // ADLAR = 0
	                   // Entrée ADC1 
	ADCSRA=0b10101110;
	SFIOR=0x00;
	
	PORTD=0x00;
	DDRD =0b00110000;

}

interrupt[ADC_INT]void adc_isr(void)
{
	      
		
		lcd_gotoxy(0,0);
                lcd_putsf(" Entree ADC1 :");                
                
                
                tension=ADCW;  // Valeur sur 10 bits de 0 à 1024
                	       // il met le resultat de 2x8 bits bout a bout
                
                sprintf(tampon,"V = %4d<--        ",tension);
                lcd_gotoxy(0,1);
                lcd_puts(tampon);			//on affiche
                delay_ms(10);
}