#pragma once

#include <stdint.h>
#include <hwo/systick.h>

struct fifo
{
	uint8_t size;
	uint8_t pWrite;
	uint8_t pRead;
	uint8_t *pBuffer;
	
	union 
	{
		struct {
			uint8_t blocking:1;		// Blocking Mode
			uint8_t irq_rd:1,		// fifo_read / fifo_poll called from IRQ (force non blocking)
					irq_wr:1;		// fifo_write called from IRQ (force non blocking)
		};
		uint8_t flags;
	};
	
	uint16_t timeout;	
	avrWAIT	wtimeout;
};

typedef struct fifo FIFO;

// FIFO Options
#define FO_BLOCKING		(1<<0)
#define FO_IRQ_RD		(1<<1)
#define FO_IRQ_WR		(1<<2)


FIFO*	fifo_alloc	(uint8_t size);

void		fifo_write	(FIFO* fifo,uint8_t byte);
uint16_t	fifo_read	(FIFO* fifo);
uint16_t	fifo_poll	(FIFO* fifo);

uint8_t	fifo_avail	(FIFO* fifo);
uint8_t	fifo_free	(FIFO* fifo);

void	fifo_set_blocking(FIFO* fifo,uint8_t blocking);
void	fifo_set_timeout(FIFO*fifo,uint16_t timeout);

void	fifo_options(FIFO* fifo,uint8_t options);

uint16_t	fifo_read_block	(FIFO* fifo,uint8_t* buffer,int maxlen);