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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
*
*/
/*
* Support and FAQ: visit <a href="http://www.atmel.com/design-support/">Atmel Support</a>
*/
#include <compiler.h>
#include <system.h>
#include <asf.h>
#include <adp_interface.h>
#define EDBG_TWI EDBG_I2C_MODULE
#define TWI_EDBG_SLAVE_ADDR 0x28
#define TIMEOUT 1000
struct i2c_master_module i2c_master_instance;
/**
* \brief Initialize EDBG I2C communication for SAM0
*
*/
enum status_code adp_interface_init(void)
{
enum status_code return_value;
system_init();
struct i2c_master_config config_i2c_master;
i2c_master_get_config_defaults(&config_i2c_master);
config_i2c_master.buffer_timeout = 10000;
return_value = i2c_master_init(&i2c_master_instance, EDBG_TWI, &config_i2c_master);
i2c_master_enable(&i2c_master_instance);
return return_value;
}
static enum status_code adp_interface_send(uint8_t* tx_buf, uint16_t length)
{
enum status_code status;
struct i2c_master_packet packet = {
.address = TWI_EDBG_SLAVE_ADDR,
.data_length = length,
.data = tx_buf,
};
/* Send data to PC */
status = i2c_master_write_packet_wait(&i2c_master_instance, &packet);
return status;
}
/**
* \brief Read response on I2C 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 = STATUS_ERR_IO;
uint8_t data_len = 0;
struct i2c_master_packet packet = {
.address = TWI_EDBG_SLAVE_ADDR,
.data_length = 1,
.data = &data_len,
};
i2c_master_read_packet_wait(&i2c_master_instance, &packet);
if (data_len != 0)
{
packet.data_length = data_len;
packet.data = rx_buf;
status = i2c_master_read_packet_wait(&i2c_master_instance, &packet);
}
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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