mirror of
https://github.com/RIOT-OS/RIOT.git
synced 2024-12-29 04:50:03 +01:00
63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
/*
|
|
* Copyright (C) 2019 Inria
|
|
*
|
|
* This file is subject to the terms and conditions of the GNU Lesser
|
|
* General Public License v2.1. See the file LICENSE in the top level
|
|
* directory for more details.
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* @ingroup cpu_nrf5x_common
|
|
* @{
|
|
*
|
|
* @file
|
|
* @brief Implementation of the temperature peripheral internal driver
|
|
*
|
|
* @author Alexandre Abadie <alexandre.abadie@inria.fr>
|
|
*
|
|
* @}
|
|
*/
|
|
|
|
#include "cpu.h"
|
|
#include "saul.h"
|
|
#include "saul_reg.h"
|
|
#include "phydat.h"
|
|
|
|
void temperature_read(int16_t *temp)
|
|
{
|
|
/* Start temperature measurement task */
|
|
NRF_TEMP->TASKS_START = 1;
|
|
|
|
/* Wait for temperature measurement to be ready */
|
|
while (!NRF_TEMP->EVENTS_DATARDY); /* takes 36us according to manual */
|
|
|
|
/* temperature is in 0.25°C step, so just divide by 4 */
|
|
*temp = (int16_t)NRF_TEMP->TEMP >> 2;
|
|
|
|
/* Clear data ready bit and stop temperature measurement task */
|
|
NRF_TEMP->EVENTS_DATARDY = 0;
|
|
NRF_TEMP->TASKS_STOP = 1;
|
|
}
|
|
|
|
static int _read_temperature(const void *dev, phydat_t *res)
|
|
{
|
|
(void) dev;
|
|
temperature_read(&res->val[0]);
|
|
res->val[1] = 0;
|
|
res->val[2] = 0;
|
|
res->unit = UNIT_TEMP_C;
|
|
res->scale = 0;
|
|
return 1;
|
|
}
|
|
|
|
const saul_reg_info_t nrf_temperature_saul_info = {
|
|
.name = "NRF_TEMP"
|
|
};
|
|
|
|
const saul_driver_t nrf_temperature_saul_driver = {
|
|
.read = _read_temperature,
|
|
.write = saul_notsup,
|
|
.type = SAUL_SENSE_TEMP,
|
|
};
|