#pragma once

#include <util/util.h>

#if defined(__USART_BUFFER__)	// buffer based i/o
#else
	#include <util/fifo.h>
#endif

#include <stdint.h>
#include <stdio.h>

#define USART_5BIT	0x0100
#define USART_6BIT	0x0200
#define USART_7BIT	0x0400
#define USART_8BIT	0x0800

#define USART_PAR_E	0x1000
#define USART_PAR_O	0x2000

#define USART_STOP2	0x4000

#define USART_MODE_TX	(1<<0)
#define USART_MODE_RX	(1<<1)


typedef struct __io_usart usart_t;


struct __io_usart
{	
	int		(*configure)	(usart_t *usart,uint32_t baud,uint32_t config);
	int		(*mode_set)		(usart_t *usart,uint16_t mode);
	int		(*mode_clear)	(usart_t *usart,uint16_t mode);
	
#if defined(__USART_BUFFER__)	// buffer based i/o

	buffer_t	tx,
				rx;

#else	// fifo based i/o

	#define usart_fifo_t	fifo64_t
	#define usart_fifo_read		f64_read
	#define usart_fifo_write		f64_write
	
	usart_fifo_t
				tx,
				rx;
	
#endif

	uint8_t	driverdata[0];
};

usart_t* usart_device_get(int usart);	

int		usart_configure	(uint8_t usart,uint32_t baud,uint32_t config);
int		usart_options	(uint8_t usart,uint8_t options);

#define usart_tx_str(u,t)	usart_tx(u,t,strlen(t))

#if defined(__USART_BUFFER__)

	int		usart_tx		(uint8_t usart,void *data,int size);
	int		usart_tx_done	(uint8_t usart);

	int		usart_rx		(uint8_t usart,void *data,int size);
	int		usart_rx_done	(uint8_t usart);


#else

	int		usart_read		(uint8_t usart);
	int		usart_write		(uint8_t usart,int ch);
	
	int		usart_tx		(uint8_t usart,char *b,int size);
	
#endif