According to the Nordic Semiconductor documentation, there is an example available within the nRF52 SDK (I found it within nRF5_SDK_15.0.0_a53641a) to read the Internal Temperature. It can be found here:
{SDK}\examples\peripheral\temperature
Does anyone know how this example can be ported across or used inside an Arduino sketch.
Thanks.
The example includes a main.c file:
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/** @file
* @defgroup temperature_example_main main.c
* @{
* @ingroup temperature_example
* @brief Temperature Example Application main file.
* @details
* This file contains the source code for a sample application using the temperature sensor.
* This contains workaround for PAN_028 rev2.0A anomalies 28, 29,30 and 31. PAN 43 is not covered.
* - PAN_028 rev2.0A anomaly 28 - TEMP: Negative measured values are not represented correctly
* - PAN_028 rev2.0A anomaly 29 - TEMP: Stop task clears the TEMP register.
* - PAN_028 rev2.0A anomaly 30 - TEMP: Temp module analog front end does not power down when DATARDY event occurs.
* - PAN_028 rev2.0A anomaly 31 - TEMP: Temperature offset value has to be manually loaded to the TEMP module
* - PAN_028 rev2.0A anomaly 43 - TEMP: Using PPI between DATARDY event and START task is not functional.
*
*/
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include "nrf.h"
#include "nrf_delay.h"
#include "nrf_temp.h"
#include "app_error.h"
#include "bsp.h"
#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
/** @brief Function for main application entry.
*/
int main(void)
{
// This function contains workaround for PAN_028 rev2.0A anomalies 28, 29,30 and 31.
int32_t volatile temp;
nrf_temp_init();
APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
NRF_LOG_DEFAULT_BACKENDS_INIT();
NRF_LOG_INFO("Temperature example started.");
while (true)
{
NRF_TEMP->TASKS_START = 1; /** Start the temperature measurement. */
/* Busy wait while temperature measurement is not finished, you can skip waiting if you enable interrupt for DATARDY event and read the result in the interrupt. */
/*lint -e{845} // A zero has been given as right argument to operator '|'" */
while (NRF_TEMP->EVENTS_DATARDY == 0)
{
// Do nothing.
}
NRF_TEMP->EVENTS_DATARDY = 0;
/**@note Workaround for PAN_028 rev2.0A anomaly 29 - TEMP: Stop task clears the TEMP register. */
temp = (nrf_temp_read() / 4);
/**@note Workaround for PAN_028 rev2.0A anomaly 30 - TEMP: Temp module analog front end does not power down when DATARDY event occurs. */
NRF_TEMP->TASKS_STOP = 1; /** Stop the temperature measurement. */
NRF_LOG_INFO("Actual temperature: %d", (int)temp);
nrf_delay_ms(500);
NRF_LOG_FLUSH();
}
}
/** @} */