2019-01-20 14:03:11 +01:00
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/****************************************************************************
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2019-08-05 14:04:14 +02:00
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* boards/b-l072z-lrwan1/src/stm32_spi.c
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2019-01-20 14:03:11 +01:00
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*
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* Copyright (C) 2019 Gregory Nutt. All rights reserved.
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* Author: Mateusz Szafoni <raiden00@railab.me>
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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
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* are met:
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*
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* 1. 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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* 2. 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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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/spi/spi.h>
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#include "up_arch.h"
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#include "chip.h"
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#include "stm32_gpio.h"
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#include "stm32_spi.h"
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#include "b-l072z-lrwan1.h"
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#include <arch/board/board.h>
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2019-05-27 16:16:24 +02:00
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#ifdef CONFIG_STM32F0L0G0_SPI
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2019-01-20 14:03:11 +01:00
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/************************************************************************************
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* Name: stm32_spidev_initialize
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*
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* Description:
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* Called to configure SPI chip select GPIO pins for the Nucleo-144 board.
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*
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************************************************************************************/
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void stm32_spidev_initialize(void)
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{
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/* NOTE: Clocking for SPI1 and/or SPI2 was already provided in stm32_rcc.c.
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* Configurations of SPI pins is performed in stm32_spi.c.
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* Here, we only initialize chip select pins unique to the board
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* architecture.
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*/
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2019-05-27 16:16:24 +02:00
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#ifdef CONFIG_STM32F0L0G0_SPI1
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2019-01-20 14:03:11 +01:00
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# ifdef CONFIG_LPWAN_SX127X
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/* Configure the SPI-based SX127X chip select GPIO */
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spiinfo("Configure GPIO for SX127X SPI1/CS\n");
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stm32_configgpio(GPIO_SX127X_CS);
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stm32_gpiowrite(GPIO_SX127X_CS, true);
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# endif
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#endif
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}
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/****************************************************************************
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* Name: stm32_spi1/2/select and stm32_spi1/2/status
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*
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* Description:
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* The external functions, stm32_spi1/2select and stm32_spi1/2status
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* must be provided by board-specific logic. They are implementations of
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* the select and status methods of the SPI interface defined by struct
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* spi_ops_s (see include/nuttx/spi/spi.h). All other methods (including
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* stm32_spibus_initialize()) are provided by common STM32 logic. To use this
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* common SPI logic on your board:
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*
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* 1. Provide logic in stm32_boardinitialize() to configure SPI chip select
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* pins.
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* 2. Provide stm32_spi1/2select() and stm32_spi1/2status() functions
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* in your board-specific logic. These functions will perform chip
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* selection and status operations using GPIOs in the way your board is
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* configured.
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* 3. Add a calls to stm32_spibus_initialize() in your low level application
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* initialization logic
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* 4. The handle returned by stm32_spibus_initialize() may then be used to bind
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* the SPI driver to higher level logic (e.g., calling
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* mmcsd_spislotinitialize(), for example, will bind the SPI driver to
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* the SPI MMC/SD driver).
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*
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****************************************************************************/
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2019-05-27 16:16:24 +02:00
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#ifdef CONFIG_STM32F0L0G0_SPI1
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2019-01-20 14:03:11 +01:00
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void stm32_spi1select(FAR struct spi_dev_s *dev, uint32_t devid,
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bool selected)
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{
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spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
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switch (devid)
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{
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#ifdef CONFIG_LPWAN_SX127X
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case SPIDEV_LPWAN(0):
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{
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spiinfo("SX127X device %s\n", selected ? "asserted" : "de-asserted");
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/* Set the GPIO low to select and high to de-select */
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stm32_gpiowrite(GPIO_SX127X_CS, !selected);
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break;
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}
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#endif
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default:
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{
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break;
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}
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}
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}
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uint8_t stm32_spi1status(FAR struct spi_dev_s *dev, uint32_t devid)
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{
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uint8_t status = 0;
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switch (devid)
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{
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#ifdef CONFIG_LPWAN_SX127X
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case SPIDEV_LPWAN(0):
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{
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status |= SPI_STATUS_PRESENT;
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break;
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}
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#endif
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default:
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{
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break;
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}
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}
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return status;
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}
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2019-05-27 16:16:24 +02:00
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#endif /* CONFIG_STM32F0L0G0_SPI1 */
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2019-01-20 14:03:11 +01:00
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2019-05-27 16:16:24 +02:00
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#ifdef CONFIG_STM32F0L0G0_SPI2
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2019-01-20 14:03:11 +01:00
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void stm32_spi2select(FAR struct spi_dev_s *dev, uint32_t devid,
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bool selected)
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{
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spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
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}
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uint8_t stm32_spi2status(FAR struct spi_dev_s *dev, uint32_t devid)
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{
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return 0;
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}
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2019-05-27 16:16:24 +02:00
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#endif /* CONFIG_STM32F0L0G0_SPI2 */
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2019-01-20 14:03:11 +01:00
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2019-05-27 16:16:24 +02:00
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#endif /* CONFIG_STM32F0L0G0_SPI */
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2019-01-20 14:38:55 +01:00
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