/**************************************************************************** * boards/arm/stm32/stm3220g-eval/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 "arm_internal.h" #include "chip.h" #include "stm32.h" #include "stm3220g-eval.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 STM3220G-EVAL * board. * ****************************************************************************/ void weak_function stm32_spidev_initialize(void) { #warning "Missing logic" } /**************************************************************************** * 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(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(struct spi_dev_s *dev, uint32_t devid) { return SPI_STATUS_PRESENT; } #endif #ifdef CONFIG_STM32_SPI2 void stm32_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 stm32_spi2status(struct spi_dev_s *dev, uint32_t devid) { return SPI_STATUS_PRESENT; } #endif #ifdef CONFIG_STM32_SPI3 void stm32_spi3select(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(struct spi_dev_s *dev, uint32_t devid) { return SPI_STATUS_PRESENT; } #endif #endif /* CONFIG_STM32_SPI1 || CONFIG_STM32_SPI2 */