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/***************************************************************************//**
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* @file platform_drivers.cpp
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* @brief Implementation of Generic Platform Drivers.
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* @author DBogdan (dragos.bogdan@analog.com)
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********************************************************************************
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* Copyright 2017,2019(c) Analog Devices, Inc.
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* - Neither the name of Analog Devices, Inc. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* - The use of this software may or may not infringe the patent rights
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* of one or more patent holders. This license does not release you
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* from the requirement that you obtain separate licenses from these
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* patent holders to use this software.
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* - Use of the software either in source or binary form, must be run
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* on or directly connected to an Analog Devices Inc. component.
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*
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* THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, NON-INFRINGEMENT,
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL ANALOG DEVICES BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, INTELLECTUAL PROPERTY RIGHTS, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*******************************************************************************/
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/******************************************************************************/
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/***************************** Include Files **********************************/
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/******************************************************************************/
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#include <stdint.h>
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#include <mbed.h>
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#include "platform_drivers.h"
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/**
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Provide implementations for the following extern functions.
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For Example - in main.cpp
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DigitalOut SS(SPI_CS);
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mbed::SPI spi(SPI_MOSI, SPI_MISO, SPI_SCK);
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mbed::I2C i2c(I2C_SDA, I2C_SCL);
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**/
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extern DigitalOut SS;
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extern SPI spi;
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extern I2C i2c;
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/******************************************************************************/
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/************************ Functions Definitions *******************************/
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/******************************************************************************/
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/**
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* @brief Initialize the I2C communication peripheral.
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* @param desc - The I2C descriptor.
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* @param param - The structure that contains the I2C parameters.
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* @return SUCCESS in case of success, FAILURE otherwise.
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*/
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int32_t mbed_i2c_init(struct i2c_desc **desc,
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const struct i2c_init_param *param)
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{
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i2c_desc * new_desc = (i2c_desc*) malloc(sizeof(i2c_desc));
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new_desc->id = param->id;
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new_desc->slave_address = param->slave_address;
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new_desc->type = param->type;
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*desc = new_desc;
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return SUCCESS;
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}
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/**
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* @brief Free the resources allocated by i2c_init().
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* @param desc - The I2C descriptor.
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* @return SUCCESS in case of success, FAILURE otherwise.
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*/
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int32_t i2c_remove(struct i2c_desc *desc)
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{
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if (desc) {
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// Unused variable - fix compiler warning
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}
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return SUCCESS;
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}
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/**
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* @brief Write data to a slave device.
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* @param desc - The I2C descriptor.
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* @param data - Buffer that stores the transmission data.
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* @param bytes_number - Number of bytes to write.
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* @param stop_bit - Stop condition control.
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* Example: 0 - A stop condition will not be generated;
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* 1 - A stop condition will be generated.
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* @return SUCCESS in case of success, FAILURE otherwise.
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*/
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int32_t mbed_i2c_write(struct i2c_desc *desc,
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uint8_t *data,
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uint8_t bytes_number,
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uint8_t stop_bit)
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{
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/**
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The MBED I2C API is reversed for parameter 4
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Instead of stop_bit - it has
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@param repeated - Repeated start, true - don't send stop at end default value is false.
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Inverting here to keep the no-OS/platform_drivers API
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*/
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i2c.write(desc->slave_address , (char *)data, bytes_number, !stop_bit);
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return SUCCESS;
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}
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/**
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* @brief Read data from a slave device.
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* @param desc - The I2C descriptor.
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* @param data - Buffer that will store the received data.
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* @param bytes_number - Number of bytes to read.
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* @param stop_bit - Stop condition control.
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* Example: 0 - A stop condition will not be generated;
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* 1 - A stop condition will be generated.
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* @return SUCCESS in case of success, FAILURE otherwise.
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*/
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int32_t mbed_i2c_read(struct i2c_desc *desc,
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uint8_t *data,
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uint8_t bytes_number,
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uint8_t stop_bit)
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{
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/**
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The MBED I2C API is reversed for parameter 4
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Instead of stop_bit - it has
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@param repeated - Repeated start, true - don't send stop at end default value is false.
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Inverting here to keep the no-OS/platform_drivers API
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*/
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i2c.read(desc->slave_address, (char *)data, bytes_number, !stop_bit);
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return SUCCESS;
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}
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/**
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* @brief Initialize the SPI communication peripheral.
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* @param desc - The SPI descriptor.
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* @param init_param - The structure that contains the SPI parameters.
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* @return SUCCESS in case of success, FAILURE otherwise.
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*/
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int32_t mbed_spi_init(struct spi_desc **desc,
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const struct spi_init_param *param)
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{
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// Create the spi description object for the device
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spi_desc * new_desc = (spi_desc*) malloc(sizeof(*new_desc));
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new_desc->chip_select = param->chip_select;
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new_desc->mode = param->mode;
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new_desc->max_speed_hz = param->max_speed_hz;
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*desc = new_desc;
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spi.format(SEND_BYTE, param->mode); //Stick to byte-multiples
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/**
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NOTE: Actual frequency of SPI clk will be somewhat device
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dependent, relating to clock-settings, prescalars etc. If absolute
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SPI frequency is required, consult your device documentation.
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**/
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spi.frequency(param->max_speed_hz);
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spi.set_default_write_value(0x00); //code to write when reading back
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SS = GPIO_HIGH; //set SS high
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return SUCCESS;
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}
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/**
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* @brief Free the resources allocated by spi_init().
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* @param desc - The SPI descriptor.
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* @return SUCCESS in case of success, FAILURE otherwise.
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*/
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int32_t spi_remove(struct spi_desc *desc)
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{
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if (desc) {
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// Unused variable - fix compiler warning
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}
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return SUCCESS;
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}
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/**
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* @brief Write and read data to/from SPI.
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*
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* This function will be updated to improve performance
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*
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* @param desc - The SPI descriptor.
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198
|
* @param data - The buffer with the transmitted/received data.
|
| ssmith73 |
1:10feea6e63a8
|
199
|
* @param bytes_number - Number of bytes to write/read.
|
| ssmith73 |
1:10feea6e63a8
|
200
|
* @return SUCCESS in case of success, FAILURE otherwise.
|
| ssmith73 |
1:10feea6e63a8
|
201
|
*/
|
| ssmith73 |
1:10feea6e63a8
|
202
|
int32_t spi_write_and_read(struct spi_desc *desc,
|
| ssmith73 |
1:10feea6e63a8
|
203
|
uint8_t *data,
|
| ssmith73 |
1:10feea6e63a8
|
204
|
uint8_t bytes_number)
|
| ssmith73 |
1:10feea6e63a8
|
205
|
{
|
| ssmith73 |
1:10feea6e63a8
|
206
|
if (desc) {
|
| ssmith73 |
1:10feea6e63a8
|
207
|
// Unused variable - fix compiler warning
|
| ssmith73 |
1:10feea6e63a8
|
208
|
}
|
| ssmith73 |
1:10feea6e63a8
|
209
|
|
| ssmith73 |
1:10feea6e63a8
|
210
|
volatile uint8_t rxData[3];
|
| ssmith73 |
1:10feea6e63a8
|
211
|
|
| ssmith73 |
1:10feea6e63a8
|
212
|
|
| ssmith73 |
1:10feea6e63a8
|
213
|
SS = GPIO_LOW; //!select SS
|
| ssmith73 |
1:10feea6e63a8
|
214
|
for(size_t byte = 0 ; byte < bytes_number ; byte++)
|
| ssmith73 |
1:10feea6e63a8
|
215
|
{
|
| ssmith73 |
1:10feea6e63a8
|
216
|
rxData[byte ] = spi.write(data[byte]);
|
| ssmith73 |
1:10feea6e63a8
|
217
|
data[byte] = rxData[byte];
|
| ssmith73 |
1:10feea6e63a8
|
218
|
}
|
| ssmith73 |
1:10feea6e63a8
|
219
|
SS = GPIO_HIGH; //!deselect SS
|
| ssmith73 |
1:10feea6e63a8
|
220
|
|
| ssmith73 |
1:10feea6e63a8
|
221
|
return SUCCESS;
|
| ssmith73 |
1:10feea6e63a8
|
222
|
}
|
| ssmith73 |
1:10feea6e63a8
|
223
|
|
| ssmith73 |
1:10feea6e63a8
|
224
|
/**
|
| ssmith73 |
1:10feea6e63a8
|
225
|
* @brief Obtain the GPIO decriptor.
|
| ssmith73 |
1:10feea6e63a8
|
226
|
* @param desc - The GPIO descriptor.
|
| ssmith73 |
1:10feea6e63a8
|
227
|
* @param gpio_number - The number of the GPIO.
|
| ssmith73 |
1:10feea6e63a8
|
228
|
* @return SUCCESS in case of success, FAILURE otherwise.
|
| ssmith73 |
1:10feea6e63a8
|
229
|
*/
|
| ssmith73 |
1:10feea6e63a8
|
230
|
int32_t gpio_get(struct gpio_desc **desc,
|
| ssmith73 |
1:10feea6e63a8
|
231
|
gpio_desc init_values)
|
| ssmith73 |
1:10feea6e63a8
|
232
|
{
|
| ssmith73 |
1:10feea6e63a8
|
233
|
gpio_desc * new_gpio = new gpio_desc;
|
| ssmith73 |
1:10feea6e63a8
|
234
|
new_gpio->id = init_values.id;
|
| ssmith73 |
1:10feea6e63a8
|
235
|
new_gpio->number = init_values.number;
|
| ssmith73 |
1:10feea6e63a8
|
236
|
new_gpio->pin = init_values.pin;
|
| ssmith73 |
1:10feea6e63a8
|
237
|
new_gpio->type = init_values.type;
|
| ssmith73 |
1:10feea6e63a8
|
238
|
|
| ssmith73 |
1:10feea6e63a8
|
239
|
*desc = new_gpio;
|
| ssmith73 |
1:10feea6e63a8
|
240
|
|
| ssmith73 |
1:10feea6e63a8
|
241
|
return SUCCESS;
|
| ssmith73 |
1:10feea6e63a8
|
242
|
}
|
| ssmith73 |
1:10feea6e63a8
|
243
|
|
| ssmith73 |
1:10feea6e63a8
|
244
|
/**
|
| ssmith73 |
1:10feea6e63a8
|
245
|
* @brief Free the resources allocated by gpio_get().
|
| ssmith73 |
1:10feea6e63a8
|
246
|
* @param desc - The SPI descriptor.
|
| ssmith73 |
1:10feea6e63a8
|
247
|
* @return SUCCESS in case of success, FAILURE otherwise.
|
| ssmith73 |
1:10feea6e63a8
|
248
|
*/
|
| ssmith73 |
1:10feea6e63a8
|
249
|
int32_t gpio_remove(struct gpio_desc *desc)
|
| ssmith73 |
1:10feea6e63a8
|
250
|
{
|
| ssmith73 |
1:10feea6e63a8
|
251
|
if (desc) {
|
| ssmith73 |
1:10feea6e63a8
|
252
|
// Unused variable - fix compiler warning
|
| ssmith73 |
1:10feea6e63a8
|
253
|
}
|
| ssmith73 |
1:10feea6e63a8
|
254
|
|
| ssmith73 |
1:10feea6e63a8
|
255
|
return SUCCESS;
|
| ssmith73 |
1:10feea6e63a8
|
256
|
}
|
| ssmith73 |
1:10feea6e63a8
|
257
|
|
| ssmith73 |
1:10feea6e63a8
|
258
|
/**
|
| ssmith73 |
1:10feea6e63a8
|
259
|
* @brief Enable the input direction of the specified GPIO.
|
| ssmith73 |
1:10feea6e63a8
|
260
|
* @param desc - The GPIO descriptor.
|
| ssmith73 |
1:10feea6e63a8
|
261
|
* @return SUCCESS in case of success, FAILURE otherwise.
|
| ssmith73 |
1:10feea6e63a8
|
262
|
*/
|
| ssmith73 |
1:10feea6e63a8
|
263
|
int32_t gpio_direction_input(struct gpio_desc *desc)
|
| ssmith73 |
1:10feea6e63a8
|
264
|
{
|
| ssmith73 |
1:10feea6e63a8
|
265
|
//unnessary for MBED
|
| ssmith73 |
1:10feea6e63a8
|
266
|
if(desc) { }
|
| ssmith73 |
1:10feea6e63a8
|
267
|
// Unused variable - fix compiler warning
|
| ssmith73 |
1:10feea6e63a8
|
268
|
|
| ssmith73 |
1:10feea6e63a8
|
269
|
return 0;
|
| ssmith73 |
1:10feea6e63a8
|
270
|
}
|
| ssmith73 |
1:10feea6e63a8
|
271
|
|
| ssmith73 |
1:10feea6e63a8
|
272
|
/**
|
| ssmith73 |
1:10feea6e63a8
|
273
|
* @brief Enable the output direction of the specified GPIO.
|
| ssmith73 |
1:10feea6e63a8
|
274
|
* @param desc - The GPIO descriptor.
|
| ssmith73 |
1:10feea6e63a8
|
275
|
* @param value - The value.
|
| ssmith73 |
1:10feea6e63a8
|
276
|
* Example: GPIO_HIGH
|
| ssmith73 |
1:10feea6e63a8
|
277
|
* GPIO_LOW
|
| ssmith73 |
1:10feea6e63a8
|
278
|
* @return SUCCESS in case of success, FAILURE otherwise.
|
| ssmith73 |
1:10feea6e63a8
|
279
|
*/
|
| ssmith73 |
1:10feea6e63a8
|
280
|
int32_t gpio_direction_output(struct gpio_desc *desc,
|
| ssmith73 |
1:10feea6e63a8
|
281
|
uint8_t value)
|
| ssmith73 |
1:10feea6e63a8
|
282
|
{
|
| ssmith73 |
1:10feea6e63a8
|
283
|
//unnessary for MBED ?
|
| ssmith73 |
1:10feea6e63a8
|
284
|
if(desc) { }
|
| ssmith73 |
1:10feea6e63a8
|
285
|
// Unused variable - fix compiler warning
|
| ssmith73 |
1:10feea6e63a8
|
286
|
|
| ssmith73 |
1:10feea6e63a8
|
287
|
return SUCCESS;
|
| ssmith73 |
1:10feea6e63a8
|
288
|
}
|
| ssmith73 |
1:10feea6e63a8
|
289
|
|
| ssmith73 |
1:10feea6e63a8
|
290
|
/**
|
| ssmith73 |
1:10feea6e63a8
|
291
|
* @brief Get the direction of the specified GPIO.
|
| ssmith73 |
1:10feea6e63a8
|
292
|
* @param desc - The GPIO descriptor.
|
| ssmith73 |
1:10feea6e63a8
|
293
|
* @param direction - The direction.
|
| ssmith73 |
1:10feea6e63a8
|
294
|
* Example: GPIO_OUT
|
| ssmith73 |
1:10feea6e63a8
|
295
|
* GPIO_IN
|
| ssmith73 |
1:10feea6e63a8
|
296
|
* @return SUCCESS in case of success, FAILURE otherwise.
|
| ssmith73 |
1:10feea6e63a8
|
297
|
*/
|
| ssmith73 |
1:10feea6e63a8
|
298
|
int32_t gpio_get_direction(struct gpio_desc *desc,
|
| ssmith73 |
1:10feea6e63a8
|
299
|
uint8_t *direction)
|
| ssmith73 |
1:10feea6e63a8
|
300
|
{
|
| ssmith73 |
1:10feea6e63a8
|
301
|
if (desc) {
|
| ssmith73 |
1:10feea6e63a8
|
302
|
// Unused variable - fix compiler warning
|
| ssmith73 |
1:10feea6e63a8
|
303
|
}
|
| ssmith73 |
1:10feea6e63a8
|
304
|
|
| ssmith73 |
1:10feea6e63a8
|
305
|
if (direction) {
|
| ssmith73 |
1:10feea6e63a8
|
306
|
// Unused variable - fix compiler warning
|
| ssmith73 |
1:10feea6e63a8
|
307
|
}
|
| ssmith73 |
1:10feea6e63a8
|
308
|
|
| ssmith73 |
1:10feea6e63a8
|
309
|
return SUCCESS;
|
| ssmith73 |
1:10feea6e63a8
|
310
|
}
|
| ssmith73 |
1:10feea6e63a8
|
311
|
|
| ssmith73 |
1:10feea6e63a8
|
312
|
/**
|
| ssmith73 |
1:10feea6e63a8
|
313
|
* @brief Set the value of the specified GPIO.
|
| ssmith73 |
1:10feea6e63a8
|
314
|
* @param desc - The GPIO descriptor.
|
| ssmith73 |
1:10feea6e63a8
|
315
|
* @param value - The value.
|
| ssmith73 |
1:10feea6e63a8
|
316
|
* Example: GPIO_HIGH
|
| ssmith73 |
1:10feea6e63a8
|
317
|
* GPIO_LOW
|
| ssmith73 |
1:10feea6e63a8
|
318
|
* @return SUCCESS in case of success, FAILURE otherwise.
|
| ssmith73 |
1:10feea6e63a8
|
319
|
*/
|
| ssmith73 |
1:10feea6e63a8
|
320
|
int32_t gpio_set_value(struct gpio_desc *desc,
|
| ssmith73 |
1:10feea6e63a8
|
321
|
uint8_t value)
|
| ssmith73 |
1:10feea6e63a8
|
322
|
{
|
| ssmith73 |
1:10feea6e63a8
|
323
|
if (desc)
|
| ssmith73 |
1:10feea6e63a8
|
324
|
DigitalOut(desc->pin, value);
|
| ssmith73 |
1:10feea6e63a8
|
325
|
else
|
| ssmith73 |
1:10feea6e63a8
|
326
|
return FAILURE;
|
| ssmith73 |
1:10feea6e63a8
|
327
|
|
| ssmith73 |
1:10feea6e63a8
|
328
|
return SUCCESS;
|
| ssmith73 |
1:10feea6e63a8
|
329
|
}
|
| ssmith73 |
1:10feea6e63a8
|
330
|
|
| ssmith73 |
1:10feea6e63a8
|
331
|
/**
|
| ssmith73 |
1:10feea6e63a8
|
332
|
* @brief Get the value of the specified GPIO.
|
| ssmith73 |
1:10feea6e63a8
|
333
|
* @param desc - The GPIO descriptor.
|
| ssmith73 |
1:10feea6e63a8
|
334
|
* @param value - The value.
|
| ssmith73 |
1:10feea6e63a8
|
335
|
* Example: GPIO_HIGH
|
| ssmith73 |
1:10feea6e63a8
|
336
|
* GPIO_LOW
|
| ssmith73 |
1:10feea6e63a8
|
337
|
* @return SUCCESS in case of success, FAILURE otherwise.
|
| ssmith73 |
1:10feea6e63a8
|
338
|
*/
|
| ssmith73 |
1:10feea6e63a8
|
339
|
int32_t gpio_get_value(struct gpio_desc *desc, uint8_t *value)
|
| ssmith73 |
1:10feea6e63a8
|
340
|
{
|
| ssmith73 |
1:10feea6e63a8
|
341
|
uint8_t returnVal = FAILURE;
|
| ssmith73 |
1:10feea6e63a8
|
342
|
if (desc) {
|
| ssmith73 |
1:10feea6e63a8
|
343
|
{
|
| ssmith73 |
1:10feea6e63a8
|
344
|
DigitalIn gpio(desc->pin);
|
| ssmith73 |
1:10feea6e63a8
|
345
|
*value = (uint8_t)gpio.read();
|
| ssmith73 |
1:10feea6e63a8
|
346
|
*value = gpio;
|
| ssmith73 |
1:10feea6e63a8
|
347
|
returnVal = gpio.is_connected() ? SUCCESS : FAILURE;
|
| ssmith73 |
1:10feea6e63a8
|
348
|
}
|
| ssmith73 |
1:10feea6e63a8
|
349
|
|
| ssmith73 |
1:10feea6e63a8
|
350
|
return returnVal;
|
| ssmith73 |
1:10feea6e63a8
|
351
|
}
|
| ssmith73 |
1:10feea6e63a8
|
352
|
return FAILURE;
|
| ssmith73 |
1:10feea6e63a8
|
353
|
}
|
| ssmith73 |
1:10feea6e63a8
|
354
|
|
| ssmith73 |
1:10feea6e63a8
|
355
|
/**
|
| ssmith73 |
1:10feea6e63a8
|
356
|
* @brief Generate miliseconds delay.
|
| ssmith73 |
1:10feea6e63a8
|
357
|
* @param msecs - Delay in miliseconds.
|
| ssmith73 |
1:10feea6e63a8
|
358
|
* @return None.
|
| ssmith73 |
1:10feea6e63a8
|
359
|
*/
|
| ssmith73 |
1:10feea6e63a8
|
360
|
void mdelay(uint32_t msecs)
|
| ssmith73 |
1:10feea6e63a8
|
361
|
{
|
| ssmith73 |
1:10feea6e63a8
|
362
|
if (msecs)
|
| ssmith73 |
1:10feea6e63a8
|
363
|
{
|
| ssmith73 |
1:10feea6e63a8
|
364
|
//unused variable - fix compiler warning
|
| ssmith73 |
1:10feea6e63a8
|
365
|
}
|
| ssmith73 |
1:10feea6e63a8
|
366
|
}
|