180 lines
6.4 KiB
C
180 lines
6.4 KiB
C
/************************************************************************************
|
|
* configs/hymini-stm32v/src/up_spi.c
|
|
* arch/arm/src/board/up_spi.c
|
|
*
|
|
* Copyright (C) 2009, 2011 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
* Laurent Latil <laurent@latil.nom.fr>
|
|
*
|
|
* 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 <debug.h>
|
|
|
|
#include <nuttx/spi/spi.h>
|
|
#include <arch/board/board.h>
|
|
|
|
#include "up_arch.h"
|
|
#include "chip.h"
|
|
#include "stm32.h"
|
|
#include "hymini_stm32v-internal.h"
|
|
|
|
#if defined(CONFIG_STM32_SPI1) || defined(CONFIG_STM32_SPI2)
|
|
|
|
/************************************************************************************
|
|
* Definitions
|
|
************************************************************************************/
|
|
|
|
/* Enables debug output from this file (needs CONFIG_DEBUG too) */
|
|
|
|
#define SPI_DEBUG /* Define to enable debug */
|
|
#define SPI_VERBOSE /* Define to enable verbose debug */
|
|
|
|
#ifdef SPI_DEBUG
|
|
# define spidbg lldbg
|
|
# ifdef SPI_VERBOSE
|
|
# define spivdbg lldbg
|
|
# else
|
|
# define spivdbg(x...)
|
|
# endif
|
|
#else
|
|
# undef SPI_VERBOSE
|
|
# define spidbg(x...)
|
|
# define spivdbg(x...)
|
|
#endif
|
|
|
|
/************************************************************************************
|
|
* Private Functions
|
|
************************************************************************************/
|
|
|
|
/************************************************************************************
|
|
* Public Functions
|
|
************************************************************************************/
|
|
|
|
/************************************************************************************
|
|
* Name: stm32_spiinitialize
|
|
*
|
|
* Description:
|
|
* Called to configure SPI chip select GPIO pins for the HY-MiniSTM32 board.
|
|
*
|
|
************************************************************************************/
|
|
|
|
void stm32_spiinitialize(void)
|
|
{
|
|
/* NOTE: Clocking for SPI1 and/or SPI2 was already provided in stm32_rcc.c.
|
|
* Configurations of SPI pins is performed in stm32_spi.c.
|
|
* Here, we only initialize chip select pins unique to the board
|
|
* architecture.
|
|
*/
|
|
|
|
#ifdef CONFIG_STM32_SPI1
|
|
/* Configure the SPI-based touch screen CS GPIO */
|
|
spivdbg("Configure GPIO for SPI1/CS\n");
|
|
stm32_configgpio(GPIO_TS_CS);
|
|
#endif
|
|
}
|
|
|
|
/****************************************************************************
|
|
* 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 up_spiinitialize())
|
|
* 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 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_STM32_SPI1
|
|
void stm32_spi1select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
|
|
{
|
|
spidbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
|
|
|
|
if (devid == SPIDEV_TOUCHSCREEN)
|
|
{
|
|
/* Set the GPIO low to select and high to de-select */
|
|
|
|
stm32_gpiowrite(GPIO_TS_CS, !selected);
|
|
}
|
|
}
|
|
|
|
uint8_t stm32_spi1status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
|
|
{
|
|
return SPI_STATUS_PRESENT;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_STM32_SPI2
|
|
void stm32_spi2select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
|
|
{
|
|
spidbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
|
|
}
|
|
|
|
uint8_t stm32_spi2status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
|
|
{
|
|
return SPI_STATUS_PRESENT;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_STM32_SPI3
|
|
void stm32_spi3select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
|
|
{
|
|
spidbg("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
|
|
}
|
|
|
|
uint8_t stm32_spi3status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
|
|
{
|
|
return SPI_STATUS_PRESENT;
|
|
}
|
|
#endif
|
|
|
|
#endif /* CONFIG_STM32_SPI1 || CONFIG_STM32_SPI2 */
|