text: /****************************************************************************
   *
   *   Copyright (C) 2012 PX4 Development Team. All rights reserved.
   *
   * 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 PX4 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.
   *
   ****************************************************************************/
  
  /**
   * @file board_spi.c
   *
   * Board-specific SPI functions.
   */
  
  /************************************************************************************
   * Included Files
   ************************************************************************************/
  
  #include <px4_config.h>
  
  #include <stdint.h>
  #include <stdbool.h>
  #include <debug.h>
  
  #include <nuttx/spi.h>
  #include <arch/board/board.h>
  
  #include <up_arch.h>
  #include <chip.h>
  #include <stm32.h>
  #include "board_config.h"
  
  /************************************************************************************
   * Public Functions
   ************************************************************************************/
  
  /************************************************************************************
   * Name: stm32_spiinitialize
   *
   * Description:
   *   Called to configure SPI chip select GPIO pins for the VRBRAIN board.
   *
   ************************************************************************************/
  
  __EXPORT void stm32_spiinitialize(void)
  {
  #ifdef CONFIG_STM32_SPI1
  	stm32_configgpio(GPIO_SPI_CS_MS5611);
  
  
  
  
  	/* De-activate all peripherals,
  	 * required for some peripheral
  	 * state machines
  	 */
  	stm32_gpiowrite(GPIO_SPI_CS_MS5611, 1);
  
  
  
  #endif
  
  #ifdef CONFIG_STM32_SPI2
  	stm32_configgpio(GPIO_SPI_CS_MPU6000);
  
  
  
  
  	/* De-activate all peripherals,
  	 * required for some peripheral
  	 * state machines
  	 */
  	stm32_gpiowrite(GPIO_SPI_CS_MPU6000, 1);
  
  
  
  
  	stm32_configgpio(GPIO_DRDY_MPU6000);
  #endif
  
  #ifdef CONFIG_STM32_SPI3
  
  	stm32_configgpio(GPIO_SPI_CS_SDCARD);
  
  	/* De-activate all peripherals,
  	 * required for some peripheral
  	 * state machines
  	 */
  
  	stm32_gpiowrite(GPIO_SPI_CS_SDCARD, 1);
  #endif
  }
  
  __EXPORT void stm32_spi1select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
  {
  	/* SPI select is active low, so write !selected to select the device */
  
  	switch (devid) {
  	case SPIDEV_MS5611:
  		/* Making sure the other peripherals are not selected */
  		stm32_gpiowrite(GPIO_SPI_CS_MS5611, !selected);
  
  
  
  		break;
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  	default:
  		break;
  
  	}
  }
  
  __EXPORT uint8_t stm32_spi1status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
  {
  	return SPI_STATUS_PRESENT;
  }
  
  #ifdef CONFIG_STM32_SPI2
  __EXPORT void stm32_spi2select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
  {
  	/* SPI select is active low, so write !selected to select the device */
  
  	switch (devid) {
  	case SPIDEV_MPU6000:
  		/* Making sure the other peripherals are not selected */
  		stm32_gpiowrite(GPIO_SPI_CS_MPU6000, !selected);
  
  
  
  		break;
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  	default:
  		break;
  
  	}
  }
  
  __EXPORT uint8_t stm32_spi2status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
  {
  	return SPI_STATUS_PRESENT;
  }
  #endif
  
  #ifdef CONFIG_STM32_SPI3
  __EXPORT void stm32_spi3select(FAR struct spi_dev_s *dev, enum spi_dev_e devid, bool selected)
  {
  	/* SPI select is active low, so write !selected to select the device */
  
  	switch (devid) {
  	case SPIDEV_MMCSD:
  		/* Making sure the other peripherals are not selected */
  		stm32_gpiowrite(GPIO_SPI_CS_SDCARD, !selected);
  
  		break;
  
  	case SPIDEV_FLASH:
  		/* Making sure the other peripherals are not selected */
  		stm32_gpiowrite(GPIO_SPI_CS_SDCARD, 1);
  
  		break;
  
  	default:
  		break;
  
  	}
  }
  
  __EXPORT uint8_t stm32_spi3status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
  {
  	return SPI_STATUS_PRESENT;
  }
  #endif
  