Subversion Repositories igor

#include <avr/io.h>

#include <avr/interrupt.h>

#include <stdint.h>

#include "uart.h"

//#define FOSC  8000000

#define FOSC    3686400

#define BAUD(x) ((FOSC/16/x)-1)

void init_usart() {

        UBRR0H = (unsigned char) (BAUD(9600) >> 8);

        UBRR0L = (unsigned char) BAUD(9600);

        UCSR0B = (1<<TXEN0) |(1<<RXEN0);

        UCSR0C = (1<<UCSZ00)|(1<<UCSZ01);

}

void send_byte(uint8_t byte) {

        while ( !(UCSR0A & (1<<UDRE0)));

        UDR0 = byte;

}

uint8_t read_byte() {

        while ( !(UCSR0A & ( 1<<RXC0)));

        return UDR0;

}