shoes/liangjianbo/nRF5_SDK_17.0.0_9d13099/examples/peripheral/temperature/main.c

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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();
    }
}


/** @} */