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nRF52840のDie Temperatureを読み出してみた。

Posted at 2024-11-16

要約

Nordic Semiconductor社製SoC nRF52840に内蔵されている温度計の値を読み出す。

コード

prj.conf

CONFIG_SENSOR=y
CONFIG_TEMP_NRF5=y

C

#include <zephyr/device.h>
#include <zephyr/drivers/sensor.h>

static const struct device* kDevDieTemp = DEVICE_DT_GET_ANY(nordic_nrf_temp);

float die_temperature(void) {
  struct sensor_value temp_val;
  if (true == device_is_ready(kDevDieTemp)) {
    sensor_sample_fetch(kDevDieTemp);
    sensor_channel_get(kDevDieTemp, SENSOR_CHAN_DIE_TEMP, &temp_val);
  }
  return ((float)temp_val.val1 + ((float)temp_val.val2 / 1000000.0f));
}

動作確認環境

toolchains v2.6.2
nRF Connect SDK v2.6.2
MDBT50Q-DB-40 (raytac_mdbt50q_db_40_nrf52840)

参考文献

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