119 lines
3.5 KiB
C
119 lines
3.5 KiB
C
/*
|
|
* Copyright (c) 2015, Nordic Semiconductor
|
|
* 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 nrf52dk-devices Device drivers
|
|
* @{
|
|
*
|
|
* \addtogroup nrf52dk-devices-temp Temperature sensor driver
|
|
* This is a driver for nRF52832 hardware sensor.
|
|
*
|
|
* @{
|
|
*
|
|
* \file
|
|
* Temperature sensor implementation.
|
|
* \author
|
|
* Wojciech Bober <wojciech.bober@nordicsemi.no>
|
|
*
|
|
*/
|
|
#ifndef SOFTDEVICE_PRESENT
|
|
#include "nrf_temp.h"
|
|
#else
|
|
#include "nrf_soc.h"
|
|
#endif
|
|
#include "contiki.h"
|
|
#include "dev/temperature-sensor.h"
|
|
|
|
|
|
const struct sensors_sensor temperature_sensor;
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
/**
|
|
* \brief Returns device temperature
|
|
* \param type ignored
|
|
* \return Device temperature in degrees Celsius
|
|
*/
|
|
static int
|
|
value(int type)
|
|
{
|
|
#ifndef SOFTDEVICE_PRESENT
|
|
int32_t volatile temp;
|
|
|
|
NRF_TEMP->TASKS_START = 1;
|
|
/* nRF52832 datasheet: one temperature measurement takes typically 36 us */
|
|
RTIMER_BUSYWAIT_UNTIL(NRF_TEMP->EVENTS_DATARDY, RTIMER_SECOND * 72 / 1000000);
|
|
NRF_TEMP->EVENTS_DATARDY = 0;
|
|
temp = nrf_temp_read();
|
|
NRF_TEMP->TASKS_STOP = 1;
|
|
|
|
return temp;
|
|
#else
|
|
int32_t temp;
|
|
sd_temp_get(&temp);
|
|
return temp >> 2;
|
|
#endif
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
/**
|
|
* \brief Configures temperature sensor
|
|
* \param type initializes the hardware sensor when \a type is set to
|
|
* \a SENSORS_HW_INIT
|
|
* \param c ignored
|
|
* \return 1
|
|
* \note This function does nothing when SoftDevice is present
|
|
*/
|
|
static int
|
|
configure(int type, int c)
|
|
{
|
|
#ifndef SOFTDEVICE_PRESENT
|
|
if (type == SENSORS_HW_INIT) {
|
|
nrf_temp_init();
|
|
}
|
|
#endif
|
|
return 1;
|
|
}
|
|
/**
|
|
* \brief Return temperature sensor status
|
|
* \param type ignored
|
|
* \return 1
|
|
*/
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
status(int type)
|
|
{
|
|
return 1;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
SENSORS_SENSOR(temperature_sensor, TEMPERATURE_SENSOR, value, configure, status);
|
|
/**
|
|
* @}
|
|
* @}
|
|
*/
|