138 lines
4.6 KiB
C
138 lines
4.6 KiB
C
/****************************************************************************
|
|
* boards/arm/stm32/cloudctrl/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 <nuttx/config.h>
|
|
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/spi/spi.h>
|
|
#include <arch/board/board.h>
|
|
|
|
#include "arm_internal.h"
|
|
#include "chip.h"
|
|
#include "stm32.h"
|
|
#include "cloudctrl.h"
|
|
|
|
#if defined(CONFIG_STM32_SPI1) || defined(CONFIG_STM32_SPI3)
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: stm32_spidev_initialize
|
|
*
|
|
* Description:
|
|
* Called to configure SPI chip select GPIO pins for the cloudctrl board.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void weak_function stm32_spidev_initialize(void)
|
|
{
|
|
/* NOTE: Clocking for SPI1 and/or SPI3 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.
|
|
*/
|
|
|
|
/* SPI1 connects to the SD CARD and to the SPI FLASH */
|
|
|
|
#ifdef CONFIG_STM32_SPI1
|
|
stm32_configgpio(GPIO_FLASH_CS); /* FLASH chip select */
|
|
#endif
|
|
|
|
/* SPI3 connects to TFT LCD module and the RF24L01 2.4G wireless module */
|
|
|
|
#ifdef CONFIG_STM32_SPI3
|
|
|
|
#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
|
|
* 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");
|
|
|
|
/* SPI1 connects to the SD CARD and to the SPI FLASH */
|
|
|
|
if (devid == SPIDEV_FLASH(0))
|
|
{
|
|
/* Set the GPIO low to select and high to de-select */
|
|
|
|
stm32_gpiowrite(GPIO_FLASH_CS, !selected);
|
|
}
|
|
}
|
|
|
|
uint8_t stm32_spi1status(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 0;
|
|
}
|
|
#endif
|
|
|
|
#endif /* CONFIG_STM32_SPI1 || CONFIG_STM32_SPI3 */
|