/home/travis/build/lis-epfl/MAVRIC_Library/hal/avr32/spi_buffered.h

/*******************************************************************************
 * Copyright (c) 2009-2016, MAV'RIC Development Team
 * All rights reserved.
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 * modification, are permitted provided that the following conditions are met:
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 * may be used to endorse or promote products derived from this software without
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/*******************************************************************************
 * \file spi_buffered.h
 *
 * \author MAV'RIC Team
 * \author Felix Schill
 *
 * \brief SPI functions for the ATMega / AVR microcontrollers
 * This library provides buffered SPI send and receive
 *
 ******************************************************************************/


#ifndef SPI_BUFFERED_H
#define SPI_BUFFERED_H

#ifdef __cplusplus
extern "C" {
#endif

#include <avr32/io.h>
#include "libs/asf/avr32/utils/preprocessor/preprocessor.h"
#include <stdint.h>
#include "libs/asf/common/boards/user_board/user_board.h"
#include "libs/asf/common/services/spi/spi_master.h"
#include "dma_channel_config.h"
typedef void (function_pointer_t)(void);

#define SPI_BUFFER_SIZE 32                              ///< The SPI buffer size, this has to be a power of 2

#define SPI_BUFFER_MASK (SPI_BUFFER_SIZE - 1)           ///< The SPI buffer mask

#define SPI_NUMBER 2                                    ///< The number of SPI


typedef struct
{
    volatile avr32_spi_t* spi;                              
    volatile uint8_t spi_out_buffer[SPI_BUFFER_SIZE];       
    volatile uint8_t spi_in_buffer[SPI_BUFFER_SIZE];        
    volatile uint8_t spi_in_buffer_head;                    
    volatile uint8_t spi_in_buffer_tail;                    
    volatile uint8_t spi_out_buffer_head;                   
    volatile uint8_t spi_out_buffer_tail;                   
    volatile uint8_t spi_receiver_on;                       
    volatile uint8_t traffic;                               
    volatile uint8_t transmission_in_progress;              
    volatile uint8_t automatic;                             
    volatile function_pointer_t* callback_function;         
    struct spi_device adc_spi;                              
} spi_buffer_t;


void spi_buffered_init(volatile avr32_spi_t* spi, int32_t spi_index);

uint8_t* spi_buffered_get_spi_in_buffer(int32_t spi_index);

void spi_buffered_init_DMA(int32_t spi_index, int32_t block_size);

void spi_buffered_trigger_DMA(int32_t spi_index, int32_t block_size);

void spi_buffered_set_callback(int32_t spi_index, function_pointer_t* function_pointer);

void spi_buffered_enable(int32_t spi_index);

void spi_buffered_disable(int32_t spi_index);

void spi_buffered_pause(int32_t spi_index);

void spi_buffered_resume(int32_t spi_index);

void  spi_buffered_start(int32_t spi_index);

void spi_buffered_activate_receive(int32_t spi_index);

void spi_buffered_deactivate_receive(int32_t spi_index);

void spi_buffered_clear_read_buffer(int32_t spi_index);

uint8_t spi_buffered_get_traffic(int32_t spi_index);

uint8_t spi_buffered_read(int32_t spi_index);

void spi_buffered_write(int32_t spi_index, uint8_t value);

void spi_buffered_transmit(int32_t spi_index);

int8_t spi_buffered_is_transfered_finished(int32_t spi_index);

void spi_buffered_flush_buffer(int32_t spi_index);

uint8_t spi_buffered_bytes_available(int32_t spi_index);

#ifdef __cplusplus
}
#endif

#endif // SPI_BUFFERED_H