serial.h

#ifndef SERIAL_H
#define SERIAL_H

#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include "status.h"

#define TX_ENABLE()         UCSR0B |= (1<<TXEN0)
#define TX_DISABLE()        UCSR0B &= ~(1<<TXEN0)

#define RX_ENABLE()         UCSR0B |= (1<<RXEN0)
#define RX_DISABLE()        UCSR0B &= ~(1<<RXEN0)

#define DATA_BITS_5         (uint8_t)(0x00)
#define DATA_BITS_6         (uint8_t)(1<<UCSZ00)
#define DATA_BITS_7         (uint8_t)(1<<UCSZ01)
#define DATA_BITS_8         (uint8_t)((1<<UCSZ00)|(1<<UCSZ01))
#define DATA_BITS_9         (uint8_t)((1<<UCSZ02)|(1<<UCSZ01)|(1<<UCSZ00))

#define STOP_BITS_1         (uint8_t)(0x00)
#define STOP_BITS_2         (uint8_t)(1<<USBS0)

#define PARITY_DISABLED     (uint8_t)(0x00)
#define PARITY_EVEN         (uint8_t)(1<<UPM01)
#define PARITY_ODD          (uint8_t)((1<<UPM01)|(1<<UPM00))

//! Initialize UART with the given parameters.
uint8_t serial_init(uint16_t baudrate, //! baudrate (prescaled)
                    uint8_t bits,      //! data bits setting
                    uint8_t parity,    //! parity bits setting
                    uint8_t stop);     //! stop bits setting


//! Get a byte from the UART
uint8_t get_byte();

//! Put a byte to the UART
void put_byte(uint8_t byte);

#endif