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

#include "mcu/mcu_def.h"
#include "buffers.h"

#ifndef _IOE_USART_H_
#define _IOE_USART_H_

#ifndef MCUSUPPORT_USART
#error "No USART interface is known on your mcu."
#endif

// TODO clock polarity and synchronous mode

#define USART_FRAMEERROR  _BV(FE0)
#define USART_DATAOVERRUN _BV(DOR0)
#define USART_PARITYERROR _BV(UPE0)

#if CONFIG_IOE_USART_INBUFFER_SIZE > 0
#define _IOE_USART_INBUFFER
volatile IOEBUFFER(_ioe_usart_inbuffer, CONFIG_IOE_USART_INBUFFER_SIZE);
#endif
#if CONFIG_IOE_USART_OUTBUFFER_SIZE > 0
#define _IOE_USART_OUTBUFFER
volatile IOEBUFFER(_ioe_usart_outbuffer, CONFIG_IOE_USART_OUTBUFFER_SIZE);
#endif


/*
 * Initialize USART device.
 */
void usart_init_async(void);
void usart_send(uint8_t data);
#ifdef _IOE_USART_OUTBUFFER
void usart_send_str(char *str);
#endif
#ifdef _IOE_USART_INBUFFER
uint8_t usart_get(void);
#endif
uint8_t usart_queryerror(void);
int8_t usart_busy(void);
#ifdef _IOE_USART_INBUFFER
uint8_t usart_inbuffered(void);
#endif
#ifdef _IOE_USART_OUTBUFFER
uint8_t usart_outbuffered(void);
#endif
#if (defined CONFIG_IOE_USART_INFILE) || (defined CONFIG_IOE_USART_OUTFILE)
FILE *spi_open(void);
#endif

// Following function must be user defined if relevant buffers not used.
extern void (*usart_receive)(uint8_t data);
extern void (*usart_sent)(void);

#endif /* _IOE_USART_H_ */