98 lines
2.7 KiB
C
98 lines
2.7 KiB
C
/*
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* Copyright (C) 2014-2017 Infineon Technologies AG. All rights reserved.
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*
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* Infineon Technologies AG (Infineon) is supplying this software for use with
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* Infineon's microcontrollers.
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* This file can be freely distributed within development tools that are
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* supporting such microcontrollers.
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*
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* THIS SOFTWARE IS PROVIDED "AS IS". NO WARRANTIES, WHETHER EXPRESS, IMPLIED
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* OR STATUTORY, INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE.
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* INFINEON SHALL NOT, IN ANY CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL,
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* OR CONSEQUENTIAL DAMAGES, FOR ANY REASON WHATSOEVER.
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*
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*/
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/**
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* @file
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* @date 04 Aug, 2017
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* @version 1.0.0
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*
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* @brief XMC4400 Application kit SCU HIB example
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*
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* The device starts showing the LED1 on, and will enter internal hibernate after ~5s, indicated by the RESET led.
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* After ~30s a wakeup event from the RTC will trigger and restart the device.
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* Additionaly the HIB_IO_0 button can be used to wake up the device before expiring the 30s.
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*
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* History <br>
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*
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* Version 1.0.0 Initial <br>
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*
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*/
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#include <xmc_gpio.h>
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#include <xmc_scu.h>
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#include <xmc_rtc.h>
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#define LED1 P5_2
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const XMC_RTC_CONFIG_t rtc_config =
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{
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.alarm.seconds = 30U,
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.prescaler = 0x7fffU
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};
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const XMC_GPIO_CONFIG_t gpio_config =
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{
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.mode = XMC_GPIO_MODE_OUTPUT_PUSH_PULL,
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.output_level = XMC_GPIO_OUTPUT_LEVEL_LOW
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};
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int main(void)
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{
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// Check to see if hibernate domain is already active, which could mean
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// that the processor is waking from a hibernation.
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if (XMC_SCU_HIB_IsHibernateDomainEnabled() == true)
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{
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// Read the status bits to see what caused the wake. Clear the wake
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// source so that the device can be put into hibernation again.
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XMC_SCU_HIB_EVENT_t event = XMC_SCU_HIB_GetEventStatus();
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XMC_SCU_HIB_ClearEventStatus(event);
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XMC_RTC_ClearEvent(XMC_RTC_EVENT_ALARM);
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XMC_SCU_HIB_ClearWakeupEventDetectionStatus();
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XMC_SCU_RESET_ClearDeviceResetReason();
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}
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else
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{
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XMC_SCU_HIB_EnableHibernateDomain();
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XMC_SCU_HIB_SetStandbyClockSource(XMC_SCU_HIB_STDBYCLKSRC_OSI);
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XMC_SCU_HIB_SetRtcClockSource(XMC_SCU_HIB_RTCCLKSRC_OSI);
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}
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XMC_RTC_Stop();
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// Do stuff
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XMC_GPIO_Init(LED1, &gpio_config);
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for(int i = 0; i < (SystemCoreClock / 2); ++i)
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{
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__NOP();
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}
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XMC_SCU_HIB_SetWakeupTriggerInput(XMC_SCU_HIB_IO_0);
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XMC_SCU_HIB_EnableEvent(XMC_SCU_HIB_EVENT_WAKEUP_ON_NEG_EDGE | XMC_SCU_HIB_EVENT_WAKEUP_ON_RTC);
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XMC_RTC_Init(&rtc_config);
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XMC_RTC_EnableHibernationWakeUp(XMC_RTC_WAKEUP_EVENT_ON_ALARM);
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XMC_RTC_Start();
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XMC_SCU_HIB_EnterHibernateStateEx(XMC_SCU_HIB_HIBERNATE_MODE_INTERNAL);
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while(1);
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}
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