130 lines
5.2 KiB
C
130 lines
5.2 KiB
C
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/********************************************************************************************
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* drivers/sensors/xen1210.h
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*
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* Copyright (C) 2014 Alan Carvalho de Assis
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* Author: Alan Carvalho de Assis <acassis@gmail.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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********************************************************************************************/
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#ifndef __DRIVERS_SENSORS_XEN1210_H
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#define __DRIVERS_SENSORS_XEN1210_H
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/********************************************************************************************
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* Included Files
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********************************************************************************************/
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#include <nuttx/config.h>
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#include <semaphore.h>
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#include <nuttx/wdog.h>
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#include <nuttx/clock.h>
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#include <nuttx/wqueue.h>
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#include <nuttx/sensors/xen1210.h>
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#if defined(CONFIG_XEN1210)
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/********************************************************************************************
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* Pre-processor Definitions
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********************************************************************************************/
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/* Driver support ***************************************************************************/
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/* This format is used to construct the /dev/mag[n] device driver path. It is defined here
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* so that it will be used consistently in all places.
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*/
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#define DEV_FORMAT "/dev/mag%d"
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#define DEV_NAMELEN 16
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/* Driver flags */
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#define XEN1210_STAT_INITIALIZED 1 /* Device has been initialized */
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/********************************************************************************************
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* Public Types
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********************************************************************************************/
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/* This structure describes the results of one XEN1210 sample */
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struct xen1210_sample_s
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{
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uint32_t data_x; /* Measured X-axis magnetic field */
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uint32_t data_y; /* Measured Y-axis magnetic field */
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uint32_t data_z; /* Measured Z-axis magnetic filed */
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};
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/* This structure represents the state of the XEN1210 driver */
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struct xen1210_dev_s
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{
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/* Common fields */
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FAR struct xen1210_config_s *config; /* Board configuration data */
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sem_t exclsem; /* Manages exclusive access to this structure */
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FAR struct spi_dev_s *spi; /* Saved SPI driver instance */
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uint8_t status; /* See XEN1210_STAT_* definitions */
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struct work_s work; /* Supports the interrupt handling "bottom half" */
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uint8_t nwaiters; /* Number of threads waiting for XEN1210 data */
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sem_t waitsem; /* Used to wait for the availability of data */
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struct work_s timeout; /* Supports timeout work */
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struct xen1210_sample_s sample; /* Last sampled accelerometer data */
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};
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/********************************************************************************************
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* Public Function Prototypes
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********************************************************************************************/
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/********************************************************************************************
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* Name: xen1210_getdata
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*
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* Description:
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* Read 24-bit from XEN1210 buffer, read three times (3 sensors)
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*
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********************************************************************************************/
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void xen1210_getdata(FAR struct xen1210_dev_s *priv);
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/********************************************************************************************
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* Name: xen1210_putdata
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*
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* Description:
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* Write 24-bit to XEN1210 buffer, write three times (3 sensors)
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*
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********************************************************************************************/
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void xen1210_putdata(FAR struct xen1210_dev_s *priv, uint32_t regval);
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#endif /* CONFIG_SENSORS_XEN1210 */
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#endif /* __DRIVERS_SENSORS_XEN1210_H */
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