spi_buffered.h

/*******************************************************************************
 * Copyright (c) 2009-2014, MAV'RIC Development Team
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice, 
 * this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright notice, 
 * this list of conditions and the following disclaimer in the documentation 
 * and/or other materials provided with the distribution.
 * 
 * 3. Neither the name of the copyright holder nor the names of its contributors
 * may be used to endorse or promote products derived from this software without
 * specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 ******************************************************************************/

/*******************************************************************************
 * \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 "preprocessor.h"
#include <stdint.h>
#include "user_board.h"
#include "spi_master.h"
#include "dma_channel_config.h"
typedef void (function_pointer_t)(void);

#define SPI_BUFFER_SIZE 32                              

#define SPI_BUFFER_MASK (SPI_BUFFER_SIZE - 1)           

#define SPI_NUMBER 2                                    


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