nuttx/boards/arm/stm32f0l0g0/b-l072z-lrwan1/src/stm32_spi.c

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/****************************************************************************
Merged in alinjerpelea/nuttx (pull request #963) Move boards to boards folder * boards: rename configs folder to boards This is the proposed layout after the change: boards: - folder containing board folders <board>: - name of each board drivers: - extra drivers specific for platform include: - header files for the boars scripts: - extra scripts specific for platform src: - board specific code tools: - extra tools specific for platform <config>: - board specific configuration(s) Note: <xxx> names are dependent on platform This is a logical change to aim to the arch layout but this is a huge change it should be done in several steps to lower the risk. Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com> * Kconfig: replace configs with boards The change is needed after the path change Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com> * Makefile: replace configs with boards The change is needed after the path change Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com> * Makefile.*: replace configs with boards The change is needed after the path change Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com> * Make.defs: replace configs with boards The change is needed after the path change Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com> * .sh: replace configs with boards The change is needed after the path change Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com> * .mk: replace configs with boards The change is needed after the path change Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com> * .c & .h: replace configs with boards The change is needed after the path change Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com> * .bat: replace configs with boards The change is needed after the path change Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com> Approved-by: Gregory Nutt <gnutt@nuttx.org>
2019-08-05 14:04:14 +02:00
* boards/b-l072z-lrwan1/src/stm32_spi.c
*
* Copyright (C) 2019 Gregory Nutt. All rights reserved.
* Author: Mateusz Szafoni <raiden00@railab.me>
*
* 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 <errno.h>
#include <debug.h>
#include <nuttx/spi/spi.h>
#include "up_arch.h"
#include "chip.h"
#include "stm32_gpio.h"
#include "stm32_spi.h"
#include "b-l072z-lrwan1.h"
#include <arch/board/board.h>
#ifdef CONFIG_STM32F0L0G0_SPI
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/************************************************************************************
* Name: stm32_spidev_initialize
*
* Description:
* Called to configure SPI chip select GPIO pins for the Nucleo-144 board.
*
************************************************************************************/
void stm32_spidev_initialize(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_STM32F0L0G0_SPI1
# ifdef CONFIG_LPWAN_SX127X
/* Configure the SPI-based SX127X chip select GPIO */
spiinfo("Configure GPIO for SX127X SPI1/CS\n");
stm32_configgpio(GPIO_SX127X_CS);
stm32_gpiowrite(GPIO_SX127X_CS, true);
# endif
#endif
}
/****************************************************************************
* Name: stm32_spi1/2/select and stm32_spi1/2/status
*
* Description:
* The external functions, stm32_spi1/2select and stm32_spi1/2status
* 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_spi1/2select() and stm32_spi1/2status() 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_STM32F0L0G0_SPI1
void stm32_spi1select(FAR struct spi_dev_s *dev, uint32_t devid,
bool selected)
{
spiinfo("devid: %d CS: %s\n", (int)devid, selected ? "assert" : "de-assert");
switch (devid)
{
#ifdef CONFIG_LPWAN_SX127X
case SPIDEV_LPWAN(0):
{
spiinfo("SX127X device %s\n", selected ? "asserted" : "de-asserted");
/* Set the GPIO low to select and high to de-select */
stm32_gpiowrite(GPIO_SX127X_CS, !selected);
break;
}
#endif
default:
{
break;
}
}
}
uint8_t stm32_spi1status(FAR struct spi_dev_s *dev, uint32_t devid)
{
uint8_t status = 0;
switch (devid)
{
#ifdef CONFIG_LPWAN_SX127X
case SPIDEV_LPWAN(0):
{
status |= SPI_STATUS_PRESENT;
break;
}
#endif
default:
{
break;
}
}
return status;
}
#endif /* CONFIG_STM32F0L0G0_SPI1 */
#ifdef CONFIG_STM32F0L0G0_SPI2
void stm32_spi2select(FAR 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(FAR struct spi_dev_s *dev, uint32_t devid)
{
return 0;
}
#endif /* CONFIG_STM32F0L0G0_SPI2 */
#endif /* CONFIG_STM32F0L0G0_SPI */