#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; }