108 lines
4.5 KiB
C
108 lines
4.5 KiB
C
/**
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* Copyright (c) 2014 - 2020, Nordic Semiconductor ASA
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form, except as embedded into a Nordic
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* Semiconductor ASA integrated circuit in a product or a software update for
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* such product, must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* 3. Neither the name of Nordic Semiconductor ASA nor the names of its
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* contributors may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* 4. This software, with or without modification, must only be used with a
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* Nordic Semiconductor ASA integrated circuit.
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*
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* 5. Any software provided in binary form under this license must not be reverse
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* engineered, decompiled, modified and/or disassembled.
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*
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* THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/** @file
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* @defgroup temperature_example_main main.c
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* @{
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* @ingroup temperature_example
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* @brief Temperature Example Application main file.
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* @details
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* This file contains the source code for a sample application using the temperature sensor.
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* This contains workaround for PAN_028 rev2.0A anomalies 28, 29,30 and 31. PAN 43 is not covered.
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* - PAN_028 rev2.0A anomaly 28 - TEMP: Negative measured values are not represented correctly
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* - PAN_028 rev2.0A anomaly 29 - TEMP: Stop task clears the TEMP register.
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* - PAN_028 rev2.0A anomaly 30 - TEMP: Temp module analog front end does not power down when DATARDY event occurs.
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* - PAN_028 rev2.0A anomaly 31 - TEMP: Temperature offset value has to be manually loaded to the TEMP module
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* - PAN_028 rev2.0A anomaly 43 - TEMP: Using PPI between DATARDY event and START task is not functional.
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*
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include "nrf.h"
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#include "nrf_delay.h"
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#include "nrf_temp.h"
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#include "app_error.h"
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#include "bsp.h"
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#include "nrf_log.h"
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#include "nrf_log_ctrl.h"
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#include "nrf_log_default_backends.h"
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/** @brief Function for main application entry.
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*/
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int main(void)
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{
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// This function contains workaround for PAN_028 rev2.0A anomalies 28, 29,30 and 31.
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int32_t volatile temp;
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nrf_temp_init();
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APP_ERROR_CHECK(NRF_LOG_INIT(NULL));
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NRF_LOG_DEFAULT_BACKENDS_INIT();
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NRF_LOG_INFO("Temperature example started.");
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while (true)
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{
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NRF_TEMP->TASKS_START = 1; /** Start the temperature measurement. */
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/* 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. */
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/*lint -e{845} // A zero has been given as right argument to operator '|'" */
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while (NRF_TEMP->EVENTS_DATARDY == 0)
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{
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// Do nothing.
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}
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NRF_TEMP->EVENTS_DATARDY = 0;
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/**@note Workaround for PAN_028 rev2.0A anomaly 29 - TEMP: Stop task clears the TEMP register. */
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temp = (nrf_temp_read() / 4);
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/**@note Workaround for PAN_028 rev2.0A anomaly 30 - TEMP: Temp module analog front end does not power down when DATARDY event occurs. */
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NRF_TEMP->TASKS_STOP = 1; /** Stop the temperature measurement. */
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NRF_LOG_INFO("Actual temperature: %d", (int)temp);
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nrf_delay_ms(500);
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NRF_LOG_FLUSH();
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}
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}
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/** @} */
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