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/**
* \file
*
* \brief ADP service 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
*
*/
#include <compiler.h>
#include <asf.h>
#include "adp_interface.h"
//! \name Embedded debugger TWI interface definitions
//@{
#define EDBG_TWI_MODULE TWI0
//@}
#define TWI_EDBG_SLAVE_ADDR 0x28
#define TIMEOUT 1000
/**
* \brief Initialize EDBG TWI interface for SAM4S
*
*/
enum status_code adp_interface_init(void)
{
sysclk_init();
/* Configure the TWI interface */
twi_master_options_t opt = {
.speed = 100000,
.chip = TWI_EDBG_SLAVE_ADDR
};
return twi_master_setup(EDBG_TWI_MODULE, &opt);
}
/**
* \brief Send data on TWI
*
* \param[in] data Pointer to data to send
* \param[in] length Number of bytes to send
*/
static enum status_code adp_interface_send(uint8_t* tx_buf, uint16_t length)
{
twi_package_t packet_write = {
.chip = TWI_EDBG_SLAVE_ADDR, /* TWI slave bus address */
.buffer = tx_buf, /* transfer data source buffer */
.length = length /* transfer data size (bytes) */
};
return twi_master_write(EDBG_TWI_MODULE, &packet_write);
}
/**
* \brief Read data on TWI
*
* \param[out] data Pointer to place received data
* \param[in] length Number of bytes to receive
*/
enum status_code adp_interface_read_response(uint8_t *data, uint16_t length)
{
enum status_code status = ERR_IO_ERROR;
uint8_t data_len = 0;
twi_package_t packet_read = {
.chip = TWI_EDBG_SLAVE_ADDR, // TWI slave bus address
.buffer = &data_len, // transfer data destination buffer
.length = 1 // transfer data size (bytes)
};
twi_master_read(EDBG_TWI_MODULE, &packet_read);
if(data_len != 0){
packet_read.length = data_len;
packet_read.buffer = data;
status = twi_master_read(EDBG_TWI_MODULE, &packet_read);
}
return status;
}
/**
* \brief Sends and reads protocol packet data byte on I2C
*
* \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 I2C character
*/
void adp_interface_transceive_procotol(uint8_t* tx_buf, uint16_t length, uint8_t* rx_buf)
{
adp_interface_send(tx_buf, length);
adp_interface_read_response(rx_buf, length);
}
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