138 lines
4.6 KiB
C
138 lines
4.6 KiB
C
/****************************************************************************
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* boards/arm/kinetis/freedom-k28f/src/k28_spi.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <assert.h>
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#include <debug.h>
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#include <nuttx/spi/spi.h>
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#include "arm_arch.h"
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#include "chip.h"
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#include "kinetis.h"
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#include "freedom-k28f.h"
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#include <arch/board/board.h>
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#if defined(CONFIG_KINETIS_SPI0) || defined(CONFIG_KINETIS_SPI1) || \
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defined(CONFIG_KINETIS_SPI2)
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: k28_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 KwikStik-K40
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* board.
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*
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****************************************************************************/
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void weak_function k28_spidev_initialize(void)
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{
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# warning "Missing logic"
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}
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/****************************************************************************
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* Name: kinetis_spi0/1/2select and kinetis_spi0/1/2status
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*
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* Description:
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* The external functions, kinetis_spi0/1/2select and
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* kinetis_spi0/1/2status must be provided by board-specific logic.
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* They are implementations of the select and status methods of the SPI
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* interface defined by struct spi_ops_s (see include/nuttx/spi/spi.h).
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* All other methods (including kinetis_spibus_initialize())
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* are provided by common Kinetis logic.
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* To use this common SPI logic on your board:
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*
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* 1. Provide logic in kinetis_boardinitialize() to configure SPI chip
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* select pins.
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* 2. Provide kinetis_spi0/1/2select() and kinetis_spi0/1/2status()
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* functions in your board-specific logic.
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* These functions will perform chip selection and status operations
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* using GPIOs in the way your board is configured.
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* 3. Add a calls to kinetis_spibus_initialize() in your low level
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* application initialization logic
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* 4. The handle returned by kinetis_spibus_initialize() may then be used
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* to bind 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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#ifdef CONFIG_KINETIS_SPI0
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void kinetis_spi0select(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,
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selected ? "assert" : "de-assert");
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# warning "Missing logic"
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}
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uint8_t kinetis_spi0status(FAR struct spi_dev_s *dev, uint32_t devid)
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{
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# warning "Missing logic"
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return SPI_STATUS_PRESENT;
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}
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#endif
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#ifdef CONFIG_KINETIS_SPI1
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void kinetis_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,
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selected ? "assert" : "de-assert");
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# warning "Missing logic"
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}
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uint8_t kinetis_spi1status(FAR struct spi_dev_s *dev, uint32_t devid)
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{
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# warning "Missing logic"
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return SPI_STATUS_PRESENT;
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}
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#endif
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#ifdef CONFIG_KINETIS_SPI2
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void kinetis_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,
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selected ? "assert" : "de-assert");
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# warning "Missing logic"
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}
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uint8_t kinetis_spi2status(FAR struct spi_dev_s *dev, uint32_t devid)
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{
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# warning "Missing logic"
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return SPI_STATUS_PRESENT;
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}
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#endif
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#endif /* CONFIG_KINETIS_SPI0 || CONFIG_KINETIS_SPI1 || CONFIG_KINETIS_SPI2 */
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