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cpu/nrf5x_common: add temperature periph driver

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Alexandre Abadie 2019-01-13 15:03:05 +01:00
parent d562af40e6
commit a142286d8d
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2 changed files with 63 additions and 0 deletions
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1
cpu/nrf5x_common/Makefile.features
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@ -3,6 +3,7 @@ FEATURES_PROVIDED += periph_cpuid
FEATURES_PROVIDED += periph_flashpage
FEATURES_PROVIDED += periph_gpio periph_gpio_irq
FEATURES_PROVIDED += periph_hwrng
FEATURES_PROVIDED += periph_temperature
# Various other features (if any)
FEATURES_PROVIDED += radio_nrfmin

62
cpu/nrf5x_common/periph/temperature.c Normal file
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@ -0,0 +1,62 @@
/*
* 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,
};