132 lines
4.1 KiB
C
132 lines
4.1 KiB
C
/*
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* Copyright 2018-2021 NXP
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* All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include "fsl_debug_console.h"
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#include "pin_mux.h"
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#include "clock_config.h"
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#include "board.h"
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#include "fsl_tempmon.h"
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/*******************************************************************************
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* Definitions
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******************************************************************************/
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#define DEMO_TEMP_MONITOR TEMPMON
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#define DEMO_TEMP_LOW_HIGH_IRQn TEMP_LOW_HIGH_IRQn
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#define DEMO_TEMP_PANIC_IRQn TEMP_PANIC_IRQn
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#define DEMO_TEMP_LOW_HIGH_IRQHandler TEMP_LOW_HIGH_IRQHandler
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#define DEMO_TEMP_PANIC_IRQHandler TEMP_PANIC_IRQHandler
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#define DEMO_HIGH_ALARM_TEMP 42U
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#define DEMO_LOW_ALARM_TEMP 40U
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#define DEMO_CLOCK_SOURCE kCLOCK_AhbClk
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#define DEMO_CLOCK_DIV kCLOCK_AhbDiv
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/*******************************************************************************
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* Prototypes
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******************************************************************************/
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/*******************************************************************************
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* Variables
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******************************************************************************/
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float temperature = 0U;
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volatile bool temperatureReach = false;
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uint32_t temperatureReachHighCount = 0x01U;
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uint32_t temperatureReachLowCount = 0x01U;
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/*******************************************************************************
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* Code
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******************************************************************************/
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void DEMO_TEMP_LOW_HIGH_IRQHandler(void)
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{
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temperatureReach = true;
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SDK_ISR_EXIT_BARRIER;
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}
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/*!
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* @brief Main function
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*/
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int main(void)
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{
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tempmon_config_t config;
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uint32_t coreFrequency;
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/* Board pin, clock, debug console init */
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BOARD_ConfigMPU();
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BOARD_InitBootPins();
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BOARD_InitBootClocks();
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BOARD_InitDebugConsole();
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EnableIRQ(DEMO_TEMP_LOW_HIGH_IRQn);
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PRINTF("TEMPMON driver example. \r\n");
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TEMPMON_GetDefaultConfig(&config);
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config.frequency = 0x03U;
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config.highAlarmTemp = DEMO_HIGH_ALARM_TEMP;
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config.lowAlarmTemp = DEMO_LOW_ALARM_TEMP;
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TEMPMON_Init(DEMO_TEMP_MONITOR, &config);
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TEMPMON_StartMeasure(DEMO_TEMP_MONITOR);
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/* Get temperature */
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temperature = TEMPMON_GetCurrentTemperature(DEMO_TEMP_MONITOR);
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PRINTF("The chip initial temperature is %.1f degrees celsius. \r\n", temperature);
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while (1)
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{
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/* Get current temperature */
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temperature = TEMPMON_GetCurrentTemperature(DEMO_TEMP_MONITOR);
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if (temperatureReach && (temperature - DEMO_HIGH_ALARM_TEMP > 0))
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{
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temperatureReach = false;
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if (0x01U == temperatureReachHighCount)
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{
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PRINTF("The chip temperature has reached high temperature that is %.1f degrees celsius. \r\n",
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temperature);
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PRINTF("The chip throttling back core frequency to waiting a desired cool down temperature . \r\n");
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/* Set the core frequency into a lower frequency. */
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CLOCK_SetDiv(DEMO_CLOCK_DIV, 0x07);
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coreFrequency = CLOCK_GetFreq(DEMO_CLOCK_SOURCE);
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PRINTF("The chip core frequency is %d Hz. \r\n", coreFrequency);
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/* Set low alarm temperature */
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TEMPMON_SetTempAlarm(DEMO_TEMP_MONITOR, DEMO_LOW_ALARM_TEMP, kTEMPMON_LowAlarmMode);
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temperatureReachHighCount++;
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}
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}
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if (temperatureReach && (temperature - DEMO_LOW_ALARM_TEMP < 0))
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{
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temperatureReach = false;
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if (0x01U == temperatureReachLowCount)
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{
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PRINTF("The chip temperature has reached low temperature that is %.1f degrees celsius. \r\n",
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temperature);
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PRINTF("The chip will return to the normal process . \r\n");
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/* Set the core frequency into a higher frequency. */
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CLOCK_SetDiv(DEMO_CLOCK_DIV, 0x0);
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coreFrequency = CLOCK_GetFreq(DEMO_CLOCK_SOURCE);
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PRINTF("The chip core frequency is %d Hz. \r\n", coreFrequency);
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temperatureReachLowCount++;
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}
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}
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}
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}
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