/configs/photon/src/stm32_spi.c
C | 194 lines | 71 code | 28 blank | 95 comment | 3 complexity | 75a37388a0f8d9c6c1e0289e16593cc3 MD5 | raw file
Possible License(s): 0BSD
- /************************************************************************************
- * configs/photon/src/stm32_spi.c
- *
- * Copyright (C) 2017 Gregory Nutt. All rights reserved.
- * Author: Gregory Nutt <gnutt@nuttx.org>
- *
- * 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. Neither the name NuttX nor the names of its contributors may be
- * used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT OWNER OR CONTRIBUTORS 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.
- *
- ************************************************************************************/
- /************************************************************************************
- * Included Files
- ************************************************************************************/
- #include <nuttx/config.h>
- #include <stdint.h>
- #include <stdbool.h>
- #include <errno.h>
- #include <debug.h>
- #include <nuttx/spi/spi.h>
- #include <arch/board/board.h>
- #include "up_arch.h"
- #include "chip.h"
- #include "stm32.h"
- #include "photon.h"
- #if defined(CONFIG_STM32_SPI1) || defined(CONFIG_STM32_SPI2) || defined(CONFIG_STM32_SPI3)
- /************************************************************************************
- * Public Functions
- ************************************************************************************/
- /************************************************************************************
- * Name: stm32_spidev_initialize
- *
- * Description:
- * Called to configure SPI chip select GPIO pins for the Mikroe Clicker2 STM32 board.
- *
- ************************************************************************************/
- void weak_function stm32_spidev_initialize(void)
- {
- }
- /****************************************************************************
- * Name: stm32_spi1/2/3select and stm32_spi1/2/3status
- *
- * Description:
- * The external functions, stm32_spi1/2/3select and stm32_spi1/2/3status must be
- * provided by board-specific logic. They are implementations of the select
- * and status methods of the SPI interface defined by struct spi_ops_s (see
- * include/nuttx/spi/spi.h). All other methods (including stm32_spibus_initialize())
- * are provided by common STM32 logic. To use this common SPI logic on your
- * board:
- *
- * 1. Provide logic in stm32_boardinitialize() to configure SPI chip select
- * pins.
- * 2. Provide stm32_spi1/2/3select() and stm32_spi1/2/3status() functions in your
- * board-specific logic. These functions will perform chip selection and
- * status operations using GPIOs in the way your board is configured.
- * 3. Add a calls to stm32_spibus_initialize() in your low level application
- * initialization logic
- * 4. The handle returned by stm32_spibus_initialize() may then be used to bind the
- * SPI driver to higher level logic (e.g., calling
- * mmcsd_spislotinitialize(), for example, will bind the SPI driver to
- * the SPI MMC/SD driver).
- *
- ****************************************************************************/
- #ifdef CONFIG_STM32_SPI1
- void stm32_spi1select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected)
- {
- spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
- }
- uint8_t stm32_spi1status(FAR struct spi_dev_s *dev, uint32_t devid)
- {
- return 0;
- }
- #endif
- #ifdef CONFIG_STM32_SPI2
- void stm32_spi2select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected)
- {
- spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
- }
- uint8_t stm32_spi2status(FAR struct spi_dev_s *dev, uint32_t devid)
- {
- return 0;
- }
- #endif
- #ifdef CONFIG_STM32_SPI3
- void stm32_spi3select(FAR struct spi_dev_s *dev, uint32_t devid, bool selected)
- {
- spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
- }
- uint8_t stm32_spi3status(FAR struct spi_dev_s *dev, uint32_t devid)
- {
- switch (devid)
- {
- default:
- break;
- }
- return 0;
- }
- #endif
- /****************************************************************************
- * Name: stm32_spi1cmddata
- *
- * Description:
- * Set or clear the SH1101A A0 or SD1306 D/C n bit to select data (true)
- * or command (false). This function must be provided by platform-specific
- * logic. This is an implementation of the cmddata method of the SPI
- * interface defined by struct spi_ops_s (see include/nuttx/spi/spi.h).
- *
- * Input Parameters:
- *
- * spi - SPI device that controls the bus the device that requires the CMD/
- * DATA selection.
- * devid - If there are multiple devices on the bus, this selects which one
- * to select cmd or data. NOTE: This design restricts, for example,
- * one one SPI display per SPI bus.
- * cmd - true: select command; false: select data
- *
- * Returned Value:
- * None
- *
- ****************************************************************************/
- #ifdef CONFIG_SPI_CMDDATA
- #ifdef CONFIG_STM32_SPI1
- int stm32_spi1cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd)
- {
- return -ENODEV;
- }
- #endif
- #ifdef CONFIG_STM32_SPI2
- int stm32_spi2cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd)
- {
- /* To be provided */
- return -ENODEV;
- }
- #endif
- #ifdef CONFIG_STM32_SPI3
- int stm32_spi3cmddata(FAR struct spi_dev_s *dev, uint32_t devid, bool cmd)
- {
- /* To be provided */
- return -ENODEV;
- }
- #endif
- #endif /* CONFIG_SPI_CMDDATA */
- #endif /* CONFIG_STM32_SPI1 || CONFIG_STM32_SPI2 */