nuttx/boards/arm/stm32/common/src/stm32_lis3dsh.c

131 lines
4.5 KiB
C
Raw Normal View History

/****************************************************************************
* boards/arm/stm32/common/src/stm32_lis3dsh.c
*
* Copyright (C) 2017 Florian Olbrich. All rights reserved.
* Author: Florian Olbrich <flox@posteo.de>
*
* 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 <errno.h>
#include <debug.h>
#include <stdio.h>
#include <nuttx/spi/spi.h>
#include <nuttx/sensors/lis3dsh.h>
#include <arch/board/board.h>
#include "stm32.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: attach_disc_lis3dsh
*
* Description:
* Attach the lis3dsh interrupt handler to PE0/EXT0 on the STM32F4 as wired
* on STM32F4Discovery
*
* Input Parameters:
* *config - The lis3dsh instance configuration data containing the IRQ number,
* device ID and interrupt handler
* interrupt_handler - The interrupt handler to attach
* arg -
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
int attach_disc_lis3dsh(FAR struct lis3dsh_config_s *config,
xcpt_t interrupt_handler)
{
return stm32_gpiosetevent(BOARD_LIS3DSH_GPIO_EXT0, true, false, false,
interrupt_handler, NULL);
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: board_lis3dsh_initialize
*
* Description:
* Initialize and register the LIS3DSH 3-axis accelerometer.
*
* Input Parameters:
* devno - The device number, used to build the device path as /dev/accN
* busno - The SPI bus number
*
* Returned Value:
* Zero (OK) on success; a negated errno value on failure.
*
****************************************************************************/
int board_lis3dsh_initialize(int devno, int busno)
{
static struct lis3dsh_config_s acc0_config;
char devpath[12];
struct spi_dev_s *spi;
int ret;
sninfo("Initializing LIS3DSH\n");
acc0_config.irq = 22;
acc0_config.spi_devid = 0;
acc0_config.attach = &attach_disc_lis3dsh;
spi = stm32_spibus_initialize(1);
if (!spi)
{
spiinfo("Failed to initialize SPI port\n");
ret = -ENODEV;
}
else
{
snprintf(devpath, 12, "/dev/acc%d", devno);
ret = lis3dsh_register(devpath, spi, &acc0_config);
}
return ret;
}