osd-contiki/platform/stm32nucleo-spirit1/dev/humidity-sensor.c
2015-10-09 19:40:39 +02:00

123 lines
3.9 KiB
C

/*
* Copyright (c) 2012, STMicroelectronics.
* 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 of the Institute 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 INSTITUTE 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 INSTITUTE 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.
*
*
*/
/*---------------------------------------------------------------------------*/
/**
* \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*/
/*---------------------------------------------------------------------------*/
/** @} */