binaire.c
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#include <avr/io.h> // for the input/output register
#include <avr/interrupt.h>
#include <util/delay.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#define PRESCALER 1024
#define TIME_SLOT 20
#define BAUDRATE 103
#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
char Donnee[24];
float temp;
void init_serial(void)
{
/* ACHTUNG : we suppose UBRR value < 0xff */
/* Not true in all case */
uint8_t baudrate = BAUDRATE;
/* Set baud rate */
UBRR0H = 0;
UBRR0L = baudrate;
/* Enable transmitter *///task_led_red();
//task_send_serial('A');
UCSR0B = (1<<TXEN0);
/* Set frame format */
UCSR0C = 0x06;
}
void send_serial(unsigned char c)
{
loop_until_bit_is_set(UCSR0A, UDRE0);
UDR0 = c;
}
void send_msg2(char Donnee[]){
while (( UCSR0A & (1<<UDRE0)) == 0){};
for (int i = 0; i < strlen(Donnee); i++){
while (( UCSR0A & (1<<UDRE0)) == 0){};
UDR0 = Donnee[i];
if (i == (strlen(Donnee) - 1)){
send_serial('\n');
send_serial('\r');
}
}
}
void send_msg(char Donnee[]){
int i=0;
for(i=0; i<strlen(Donnee); i++){
if (i==strlen(Donnee)-1){
send_serial(Donnee[i]);
send_serial('\n');
send_serial('\r');
}
else{
send_serial(Donnee[i]);
}
_delay_ms(100);
}
}
// équivalent de analogueRead()
int analogReadNew(uint8_t pin) {
/*
// Définition de la référence de tension
ADMUX |= (1 << REFS0);
// On sélectionne notre pin
ADMUX |= pin & 0x07;
// On lance la conversion
sbi(ADCSRA, ADSC);
// Le bit sera désactivé à la fin de la conversion
while(bit_is_set(ADCSRA, ADSC));
// Lire ADCL en premier est obligatoire, sinon l'ADC se bloque
uint8_t low = ADCL;
// Récupérer le résultat
return ((ADCH << 8) | low);
*/
ADCSRA |= (1<<ADPS2)|(1<<ADPS1)|(1<<ADPS0);
ADMUX |= (1<<REFS0)|(1<<ADLAR);
ADMUX = (ADMUX&0xf0)|pin;
ADCSRA |= (1<<ADEN);
ADCSRA |= (1<<ADSC);
while(bit_is_set(ADCSRA, ADSC));
return ADCH;
}
int main()
{
int reading;
init_serial();
while(1){
reading=analogReadNew(0);
temp = reading * 1.9607843;
dtostrf(temp, 4, 1, Donnee);
//send_serial('T');
//send_serial('=');
send_msg2(Donnee);
_delay_ms(2000);
}
return 0;
}