contiki/platform/stm32nucleo-spirit1/dev/humidity-sensor.c

/**
******************************************************************************
* @file    humidity-sensor.c
* @author  System LAB
* @version V1.0.0
* @date    17-June-2015
* @brief   Enable humidity sensor functionality 
******************************************************************************
* @attention
*
* <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
*
* 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 of STMicroelectronics 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 HOLDER 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,
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*/
/**
 * \addtogroup stm32nucleo-spirit1-humidity-sensor
 * @{
 *
 * \file
 * Driver for the stm32nucleo-spirit1 Humidity sensor (on expansion board)
 */
/*---------------------------------------------------------------------------*/
#if COMPILE_SENSORS
/*---------------------------------------------------------------------------*/
#include "lib/sensors.h"
#include "humidity-sensor.h"
#include "st-lib.h"
/*---------------------------------------------------------------------------*/
static int _active = 1;
/*---------------------------------------------------------------------------*/
static void init(void)
{
  /*Temperature and Humity sensors share the same hw*/
  if (!st_lib_bsp_hum_temp_is_initialized()) {
	st_lib_bsp_hum_temp_init();
	_active=1;
  }
}
/*---------------------------------------------------------------------------*/
static void activate(void)
{
  _active = 1;
}
/*---------------------------------------------------------------------------*/
static void deactivate(void)
{
  _active = 0;
}
/*---------------------------------------------------------------------------*/
static int active(void)
{
  return _active;
}
/*---------------------------------------------------------------------------*/
static int value(int type)
{
  uint32_t humidity;
  volatile float humidity_value;
  
  st_lib_bsp_hum_temp_get_humidity((float *)&humidity_value); 
  
  humidity = humidity_value * 10;
  return humidity;
}
/*---------------------------------------------------------------------------*/
static int configure(int type, int value)
{
  switch(type) {
    case SENSORS_HW_INIT:
      init();
      return 1;
    case SENSORS_ACTIVE:
      if(value) {      
        activate();
      } else {
        deactivate();
      }
      return 1;
  }
 
  return 0;
}
/*---------------------------------------------------------------------------*/
static int status(int type)
{
  switch(type) {
    case SENSORS_READY:
      return active();
  }
  
  return 0;
}
/*---------------------------------------------------------------------------*/
SENSORS_SENSOR(humidity_sensor, HUMIDITY_SENSOR, value, configure, status);
/*---------------------------------------------------------------------------*/
#endif /*COMPILE_SENSORS*/
/*---------------------------------------------------------------------------*/
/** @} */