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/**
* \file
*
* \brief ADP SPI interface implementation
*
* Copyright (C) 2015 Atmel Corporation. All rights reserved.
*
* \asf_license_start
*
* \page License
*
* 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. The name of Atmel may not be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* 4. This software may only be redistributed and used in connection with an
* Atmel microcontroller product.
*
* THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
*
* \asf_license_stop
*
*/
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
*/
#include <compiler.h>
#include <asf.h>
#include "adp_interface.h"
//! \name Embedded debugger SPI interface definitions
//@{
#define EDBG_SPI_MODULE SPI
//@}
#define SPI_CHIP_SEL SPI_NPCS3_PA5_GPIO
#define SPI_DEVICE_ID 3
#define SPI_BAUDRATE 1500000
struct spi_device SPI_DEVICE = {
/** Board specific select id */
.id = SPI_DEVICE_ID
};
/**
* \brief Send SPI start condition
*
*/
static void adp_interface_send_start(void)
{
spi_select_device(EDBG_SPI_MODULE, &SPI_DEVICE);
}
/**
* \brief Send SPI stop condition
*
*/
static void adp_interface_send_stop(void)
{
spi_deselect_device(EDBG_SPI_MODULE, &SPI_DEVICE);
}
/**
* \brief Sends and reads data byte on SPI
*
* \param[in] data Data byte to send
* \param[in] tx_data SPI character to transmit
* \param[out] rx_data Pointer to store the received SPI character
*/
static void adp_interface_transceive(uint8_t *tx_data, uint8_t *rx_data, uint16_t length)
{
spi_transceive_packet(EDBG_SPI_MODULE, tx_data, rx_data, length);
}
/**
* \brief Initialize EDBG SPI communication for SAM
*
*/
enum status_code adp_interface_init(void)
{
sysclk_init();
/* Configure the SPI interface */
spi_master_init(EDBG_SPI_MODULE);
spi_master_setup_device(EDBG_SPI_MODULE, &SPI_DEVICE, SPI_MODE_0,
SPI_BAUDRATE, 0);
spi_enable(EDBG_SPI_MODULE);
return STATUS_OK;
}
/**
* \brief Sends and reads protocol packet data byte on SPI
*
* \param[in] tx_buf Pointer to send the protocol packet data
* \param[in] length The length of the send protocol packet data
* \param[out] rx_buf Pointer to store the received SPI character
*/
void adp_interface_transceive_procotol(uint8_t* tx_buf, uint16_t length, uint8_t* rx_buf)
{
/* Send SPI start condition */
adp_interface_send_start();
adp_interface_transceive(tx_buf, rx_buf, length);
/* Send SPI end condition */
adp_interface_send_stop();
}
/**
* \brief Read response on SPI from PC
*
* return Status
* \param[in] rx_buf Pointer to receive the data
* \param[in] length The length of the read data
* \param[out] rx_buf Pointer to store the received SPI character
*/
enum status_code adp_interface_read_response(uint8_t* rx_buf, uint16_t length)
{
enum status_code status;
/* Send SPI start condition */
adp_interface_send_start();
status = spi_read_packet(EDBG_SPI_MODULE, rx_buf, length);
/* Send SPI end condition */
adp_interface_send_stop();
return status;
}
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