175 lines
5.3 KiB
C
175 lines
5.3 KiB
C
/*
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* Copyright (c) 2015, Freescale Semiconductor, Inc.
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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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* o Redistributions of source code must retain the above copyright notice, this list
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* of conditions and the following disclaimer.
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*
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* o Redistributions in binary form must reproduce the above copyright notice, this
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* list of conditions and the following disclaimer in the documentation and/or
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* other materials provided with the distribution.
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*
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* o Neither the name of Freescale Semiconductor, Inc. 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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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "fsl_debug_console.h"
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#include "board.h"
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#include "fsl_rtc.h"
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#include "pin_mux.h"
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#include "clock_config.h"
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/*******************************************************************************
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* Definitions
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******************************************************************************/
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/*******************************************************************************
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* Prototypes
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******************************************************************************/
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void BOARD_SetRtcClockSource(void);
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/*******************************************************************************
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* Variables
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******************************************************************************/
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volatile bool busyWait;
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/*******************************************************************************
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* Code
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******************************************************************************/
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void BOARD_SetRtcClockSource(void)
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{
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/* Enable the RTC 32KHz oscillator */
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RTC->CR |= RTC_CR_OSCE_MASK;
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}
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/*!
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* @brief ISR for Alarm interrupt
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*
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* This function changes the state of busyWait.
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*/
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void RTC_IRQHandler(void)
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{
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if (RTC_GetStatusFlags(RTC) & kRTC_AlarmFlag)
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{
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busyWait = false;
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/* Clear alarm flag */
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RTC_ClearStatusFlags(RTC, kRTC_AlarmInterruptEnable);
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}
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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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uint32_t sec;
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uint32_t currSeconds;
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rtc_datetime_t date;
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rtc_config_t rtcConfig;
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/* Board pin, clock, debug console init */
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BOARD_InitPins();
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BOARD_BootClockRUN();
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BOARD_InitDebugConsole();
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/* Init RTC */
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/*
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* rtcConfig.wakeupSelect = false;
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* rtcConfig.updateMode = false;
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* rtcConfig.supervisorAccess = false;
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* rtcConfig.compensationInterval = 0;
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* rtcConfig.compensationTime = 0;
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*/
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RTC_GetDefaultConfig(&rtcConfig);
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RTC_Init(RTC, &rtcConfig);
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/* Select RTC clock source */
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BOARD_SetRtcClockSource();
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PRINTF("RTC example: set up time to wake up an alarm\r\n");
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/* Set a start date time and start RT */
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date.year = 2014U;
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date.month = 12U;
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date.day = 25U;
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date.hour = 19U;
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date.minute = 0;
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date.second = 0;
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/* RTC time counter has to be stopped before setting the date & time in the TSR register */
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RTC_StopTimer(RTC);
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/* Set RTC time to default */
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RTC_SetDatetime(RTC, &date);
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/* Enable RTC alarm interrupt */
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RTC_EnableInterrupts(RTC, kRTC_AlarmInterruptEnable);
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/* Enable at the NVIC */
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EnableIRQ(RTC_IRQn);
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/* Start the RTC time counter */
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RTC_StartTimer(RTC);
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/* This loop will set the RTC alarm */
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while (1)
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{
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busyWait = true;
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/* Get date time */
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RTC_GetDatetime(RTC, &date);
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/* print default time */
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PRINTF("Current datetime: %04hd-%02hd-%02hd %02hd:%02hd:%02hd\r\n", date.year, date.month, date.day, date.hour,
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date.minute, date.second);
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/* Get alarm time from user */
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sec = 0;
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PRINTF("Please input the number of second to wait for alarm \r\n");
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PRINTF("The second must be positive value\r\n");
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while (sec < 1)
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{
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SCANF("%d", &sec);
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}
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/* Read the RTC seconds register to get current time in seconds */
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currSeconds = RTC->TSR;
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/* Add alarm seconds to current time */
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currSeconds += sec;
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/* Set alarm time in seconds */
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RTC->TAR = currSeconds;
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/* Get alarm time */
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RTC_GetAlarm(RTC, &date);
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/* Print alarm time */
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PRINTF("Alarm will occur at: %04hd-%02hd-%02hd %02hd:%02hd:%02hd\r\n", date.year, date.month, date.day,
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date.hour, date.minute, date.second);
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/* Wait until alarm occurs */
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while (busyWait)
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{
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}
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PRINTF("\r\n Alarm occurs !!!! ");
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}
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}
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