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/****************************************************************************
*
* 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 px4fmu_spi.c
*
* Board-specific SPI functions.
*/
/************************************************************************************
* Included Files
************************************************************************************/
#include <nuttx/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 PX4FMU board.
*
************************************************************************************/
__EXPORT void weak_function stm32_spiinitialize(void)
{
#ifdef CONFIG_STM32_SPI1
stm32_configgpio(GPIO_SPI_CS_GYRO);
stm32_configgpio(GPIO_SPI_CS_ACCEL_MAG);
stm32_configgpio(GPIO_SPI_CS_BARO);
stm32_configgpio(GPIO_SPI_CS_MPU);
/* De-activate all peripherals,
* required for some peripheral
* state machines
*/
stm32_gpiowrite(GPIO_SPI_CS_GYRO, 1);
stm32_gpiowrite(GPIO_SPI_CS_ACCEL_MAG, 1);
stm32_gpiowrite(GPIO_SPI_CS_BARO, 1);
stm32_gpiowrite(GPIO_SPI_CS_MPU, 1);
stm32_configgpio(GPIO_EXTI_GYRO_DRDY);
stm32_configgpio(GPIO_EXTI_MAG_DRDY);
stm32_configgpio(GPIO_EXTI_ACCEL_DRDY);
stm32_configgpio(GPIO_EXTI_MPU_DRDY);
#endif
#ifdef CONFIG_STM32_SPI2
stm32_configgpio(GPIO_SPI_CS_FRAM);
stm32_gpiowrite(GPIO_SPI_CS_FRAM, 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 PX4_SPIDEV_GYRO:
/* Making sure the other peripherals are not selected */
stm32_gpiowrite(GPIO_SPI_CS_GYRO, !selected);
stm32_gpiowrite(GPIO_SPI_CS_ACCEL_MAG, 1);
stm32_gpiowrite(GPIO_SPI_CS_BARO, 1);
stm32_gpiowrite(GPIO_SPI_CS_MPU, 1);
break;
case PX4_SPIDEV_ACCEL_MAG:
/* Making sure the other peripherals are not selected */
stm32_gpiowrite(GPIO_SPI_CS_GYRO, 1);
stm32_gpiowrite(GPIO_SPI_CS_ACCEL_MAG, !selected);
stm32_gpiowrite(GPIO_SPI_CS_BARO, 1);
stm32_gpiowrite(GPIO_SPI_CS_MPU, 1);
break;
case PX4_SPIDEV_BARO:
/* Making sure the other peripherals are not selected */
stm32_gpiowrite(GPIO_SPI_CS_GYRO, 1);
stm32_gpiowrite(GPIO_SPI_CS_ACCEL_MAG, 1);
stm32_gpiowrite(GPIO_SPI_CS_BARO, !selected);
stm32_gpiowrite(GPIO_SPI_CS_MPU, 1);
break;
case PX4_SPIDEV_MPU:
/* Making sure the other peripherals are not selected */
stm32_gpiowrite(GPIO_SPI_CS_GYRO, 1);
stm32_gpiowrite(GPIO_SPI_CS_ACCEL_MAG, 1);
stm32_gpiowrite(GPIO_SPI_CS_BARO, 1);
stm32_gpiowrite(GPIO_SPI_CS_MPU, !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)
{
/* there can only be one device on this bus, so always select it */
stm32_gpiowrite(GPIO_SPI_CS_FRAM, !selected);
}
__EXPORT uint8_t stm32_spi2status(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
{
/* FRAM is always present */
return SPI_STATUS_PRESENT;
}
#endif
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