/**************************************************************************** * boards/arm/stm32l4/b-l475e-iot01a/src/stm32_spi.c * * Licensed to the Apache Software Foundation (ASF) under one or more * contributor license agreements. See the NOTICE file distributed with * this work for additional information regarding copyright ownership. The * ASF licenses this file to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance with the * License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations * under the License. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include #include "stm32l4_gpio.h" #include "stm32l4_spi.h" #include "b-l475e-iot01a.h" /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Currently no devices are defined on SPI1 or SPI2 */ #undef CONFIG_STM32L4_SPI1 #undef CONFIG_STM32L4_SPI2 /* Only the SPSGRF is currently supported on SPI3 */ #ifndef HAVE_SPSGRF # undef CONFIG_STM32L4_SPI3 #endif #if defined(CONFIG_STM32L4_SPI1) || defined(CONFIG_STM32L4_SPI2) || defined(CONFIG_STM32L4_SPI3) /**************************************************************************** * Public Data ****************************************************************************/ /* Global driver instances */ #ifdef CONFIG_STM32L4_SPI1 struct spi_dev_s *g_spi1; #endif #ifdef CONFIG_STM32L4_SPI2 struct spi_dev_s *g_spi2; #endif #ifdef CONFIG_STM32L4_SPI3 struct spi_dev_s *g_spi3; #endif /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: stm32l4_spidev_initialize * * Description: * Called to configure SPI chip select GPIO pins for the Nucleo-F401RE and * Nucleo-F411RE boards. * ****************************************************************************/ void weak_function stm32l4_spidev_initialize(void) { #ifdef CONFIG_STM32L4_SPI1 /* Configure SPI-based devices */ g_spi1 = stm32l4_spibus_initialize(1); if (!g_spi1) { spierr("ERROR: [boot] FAILED to initialize SPI port 1\n"); } /* Configure chip select GPIOs */ #endif #ifdef CONFIG_STM32L4_SPI2 /* Configure SPI-based devices */ g_spi2 = stm32l4_spibus_initialize(2); /* Configure chip select GPIOs */ #endif #ifdef CONFIG_STM32L4_SPI3 /* Configure SPI-based devices */ g_spi3 = stm32l4_spibus_initialize(3); /* Configure chip select GPIOs */ #ifdef HAVE_SPSGRF stm32l4_configgpio(GPIO_SPSGRF_CS); #endif #endif } /**************************************************************************** * Name: stm32l4_spi1/2/3select and stm32l4_spi1/2/3status * * Description: * The external functions, stm32l4_spi1/2/3select and * stm32l4_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 up_spiinitialize()) are provided by * common STM32 logic. To use this common SPI logic on your board: * * 1. Provide logic in stm32l4_boardinitialize() to configure SPI chip * select pins. * 2. Provide stm32l4_spi1/2/3select() and stm32l4_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 up_spiinitialize() in your low level application * initialization logic * 4. The handle returned by up_spiinitialize() 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_STM32L4_SPI1 void stm32l4_spi1select(struct spi_dev_s *dev, uint32_t devid, bool selected) { spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert"); } uint8_t stm32l4_spi1status(struct spi_dev_s *dev, uint32_t devid) { return 0; } #endif #ifdef CONFIG_STM32L4_SPI2 void stm32l4_spi2select(struct spi_dev_s *dev, uint32_t devid, bool selected) { spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert"); } uint8_t stm32l4_spi2status(struct spi_dev_s *dev, uint32_t devid) { return 0; } #endif #ifdef CONFIG_STM32L4_SPI3 void stm32l4_spi3select(struct spi_dev_s *dev, uint32_t devid, bool selected) { spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert"); #ifdef HAVE_SPSGRF if (devid == SPIDEV_WIRELESS(0)) { stm32l4_gpiowrite(GPIO_SPSGRF_CS, !selected); } #endif } uint8_t stm32l4_spi3status(struct spi_dev_s *dev, uint32_t devid) { return 0; } #endif /**************************************************************************** * Name: stm32l4_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_STM32L4_SPI1 int stm32l4_spi1cmddata(struct spi_dev_s *dev, uint32_t devid, bool cmd) { return OK; } #endif #ifdef CONFIG_STM32L4_SPI2 int stm32l4_spi2cmddata(struct spi_dev_s *dev, uint32_t devid, bool cmd) { return OK; } #endif #ifdef CONFIG_STM32L4_SPI3 int stm32l4_spi3cmddata(struct spi_dev_s *dev, uint32_t devid, bool cmd) { return OK; } #endif #endif /* CONFIG_SPI_CMDDATA */ #endif /* CONFIG_STM32L4_SPI1 || CONFIG_STM32L4_SPI2 || CONFIG_STM32L4_SPI3 */