ae4e26c2e0
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@2103 42af7a65-404d-4744-a932-0658087f49c3
143 lines
5.5 KiB
C
Executable File
143 lines
5.5 KiB
C
Executable File
/************************************************************************************
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* configs/stm3210e_eval/src/up_spi.c
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* arch/arm/src/board/up_spi.c
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*
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* Copyright (C) 2009 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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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 <sys/types.h>
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#include <debug.h>
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#include <nuttx/spi.h>
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#include <arch/board/board.h>
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#include "up_arch.h"
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#include "chip.h"
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#include "stm32_internal.h"
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#include "stm3210e-internal.h"
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#if defined(CONFIG_STM32_SPI1) || defined(CONFIG_STM32_SPI2)
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/************************************************************************************
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* Definitions
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************************************************************************************/
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/* Enables debug output from this file (needs CONFIG_DEBUG too) */
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#undef SPI_DEBUG /* Define to enable debug */
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#undef SPI_VERBOSE /* Define to enable verbose debug */
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#ifdef SPI_DEBUG
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# define spidbg lldbg
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# ifdef SPI_VERBOSE
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# define spivdbg lldbg
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# else
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# define spivdbg(x...)
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# endif
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#else
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# undef SPI_VERBOSE
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# define spidbg(x...)
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# define spivdbg(x...)
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#endif
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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_spiinitialize
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*
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* Description:
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* Called to configure SPI chip select GPIO pins for the STM3210E-EVAL board.
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*
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************************************************************************************/
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void weak_function stm32_spiinitialize(void)
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{
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/* Configure the SPI-based microSD CS GPIO */
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}
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/****************************************************************************
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* The external functions, stm32_spi1/2select and stm32_spi1/2status must be
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* provided by board-specific logic. These are implementations of the
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* select and status methods SPI interface defined by struct spi_ops_s (see
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* include/nuttx/spi.h). All other methods (including up_spiinitialize())
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* are provided by common logic. To use this common SPI logic on your board:
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*
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* 1. Provide stm32_spi1/2select() and stm32_spi1/2status() functions in your
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* board-specific logic. This function will perform chip selection and
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* status operations using GPIOs in the way your board is configured.
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* 2. Add a call to up_spiinitialize() in your low level initialization
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* logic
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* 3. The handle returned by up_spiinitialize() may then be used to bind the
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* 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_STM32_SPI1
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void stm32_spi1select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, boolean selected)
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{
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spidbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
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}
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ubyte stm32_spi1status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
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{
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return SPI_STATUS_PRESENT;
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}
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#endif
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#ifdef CONFIG_STM32_SPI2
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void stm32_spi2select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, boolean selected)
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{
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spidbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
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}
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ubyte stm32_spi2status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
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{
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return SPI_STATUS_PRESENT;
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}
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#endif
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#endif /* CONFIG_STM32_SPI1 || CONFIG_STM32_SPI2 */
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