Commit e742bccc85fd659b0d596cd2a76444f7d4f7f5cc
1 parent
ac8974ba
ADD - Séparation des fonctions de liaison série dans une librairie serial.
Cette librairie contient également la fonction send_ack qui sera utilisé pour informer de la réalisation de l'action
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| @@ -0,0 +1,33 @@ | @@ -0,0 +1,33 @@ | ||
| 1 | +#include "serial.h" | ||
| 2 | + | ||
| 3 | +void init_serial(unsigned long int speed) //initialisation de la liaison série | ||
| 4 | +{ | ||
| 5 | +/* Set baud rate */ | ||
| 6 | +UBRR0 = CPU_FREQ/(((unsigned long int)speed)<<4)-1; | ||
| 7 | + | ||
| 8 | +/* Enable transmitter & receiver */ | ||
| 9 | +UCSR0B = (1<<TXEN0 | 1<<RXEN0); | ||
| 10 | + | ||
| 11 | +/* Set 8 bits character and 1 stop bit */ | ||
| 12 | +UCSR0C = (1<<UCSZ01 | 1<<UCSZ00); | ||
| 13 | + | ||
| 14 | +/* Set off UART baud doubler */ | ||
| 15 | +UCSR0A &= ~(1 << U2X0); | ||
| 16 | +} | ||
| 17 | + | ||
| 18 | +void send_serial(uint8_t c) //envoyer un carctère sur le port série | ||
| 19 | +{ | ||
| 20 | +loop_until_bit_is_set(UCSR0A, UDRE0); | ||
| 21 | +UDR0 = c; | ||
| 22 | +} | ||
| 23 | + | ||
| 24 | + | ||
| 25 | +uint8_t get_serial(void) //récupérer un caractère envoyé sur le port série | ||
| 26 | +{ | ||
| 27 | +loop_until_bit_is_set(UCSR0A, RXC0); | ||
| 28 | +return UDR0; | ||
| 29 | +} | ||
| 30 | + | ||
| 31 | +void send_ack(void){ | ||
| 32 | + send_serial(0x01); | ||
| 33 | +} |
| @@ -0,0 +1,13 @@ | @@ -0,0 +1,13 @@ | ||
| 1 | +#ifndef __SERIAL_H__ | ||
| 2 | +#define __SERIAL_H__ | ||
| 3 | + | ||
| 4 | +#include <avr/io.h> // for the input/output register | ||
| 5 | +#include <util/delay.h> | ||
| 6 | + | ||
| 7 | +#define CPU_FREQ 16000000L // Assume a CPU frequency of 16Mhz | ||
| 8 | + | ||
| 9 | +void init_serial(unsigned long int speed); | ||
| 10 | +void send_serial(uint8_t c); | ||
| 11 | +uint8_t get_serial(void); | ||
| 12 | +void send_ack(void); | ||
| 13 | +#endif |