RTC报警唤醒

/**************************************************************************//**

 * [url=home.php?mod=space&uid=288409]@file[/url]     main.c

 * [url=home.php?mod=space&uid=895143]@version[/url]  V3.00

 * $Revision: 6 $

 * $Date: 15/09/02 10:04a $

 * [url=home.php?mod=space&uid=247401]@brief[/url]    Use RTC alarm interrupt event to wake up system.

 * @note

 * Copyright (C) 2013~2015 Nuvoton Technology Corp. All rights reserved.

 ******************************************************************************/

#include <stdio.h>

#include "M451Series.h"



#define PLL_CLOCK           72000000





/*---------------------------------------------------------------------------------------------------------*/

/* Global Interface Variables Declarations                                                                 */

/*---------------------------------------------------------------------------------------------------------*/

extern int IsDebugFifoEmpty(void);

volatile uint8_t g_u8IsRTCAlarmINT = 0;





/**

 * @brief       IRQ Handler for RTC Interrupt

 *

 * @param       None

 *

 * [url=home.php?mod=space&uid=266161]@return[/url]      None

 *

 * [url=home.php?mod=space&uid=1543424]@Details[/url]     The RTC_IRQHandler is default IRQ of RTC, declared in startup_M451Series.s.

 */

void RTC_IRQHandler(void)

{

    /* To check if RTC alarm interrupt occurred */

    if(RTC_GET_ALARM_INT_FLAG() == 1)

    {

        /* Clear RTC alarm interrupt flag */

        RTC_CLEAR_ALARM_INT_FLAG();



        g_u8IsRTCAlarmINT++;

    }

}



void SYS_Init(void)

{

    /*---------------------------------------------------------------------------------------------------------*/

    /* Init System Clock                                                                                       */

    /*---------------------------------------------------------------------------------------------------------*/

    /* Enable HIRC clock */

    CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk);



    /* Waiting for HIRC clock ready */

    CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);



    /* Switch HCLK clock source to HIRC */

    CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1));



    /* Enable HXT and LXT-32KHz */

    CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk | CLK_PWRCTL_LXTEN_Msk);



    /* Waiting for clock ready */

    CLK_WaitClockReady(CLK_STATUS_HXTSTB_Msk | CLK_STATUS_LXTSTB_Msk);



    /* Set core clock as PLL_CLOCK from PLL and SysTick source to HCLK/2*/

    CLK_SetCoreClock(PLL_CLOCK);

    CLK_SetSysTickClockSrc(CLK_CLKSEL0_STCLKSEL_HCLK_DIV2);



    /* Enable peripheral clock */

    CLK_EnableModuleClock(UART0_MODULE);

    CLK_EnableModuleClock(RTC_MODULE);



    /* Peripheral clock source */

    CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UARTSEL_PLL, CLK_CLKDIV0_UART(1));



    /*---------------------------------------------------------------------------------------------------------*/

    /* Init I/O Multi-function                                                                                 */

    /*---------------------------------------------------------------------------------------------------------*/

    /* Set PD multi-function pins for UART0 RXD, TXD */

    SYS->GPD_MFPL = SYS_GPD_MFPL_PD0MFP_UART0_RXD | SYS_GPD_MFPL_PD1MFP_UART0_TXD;

}



void UART0_Init(void)

{

    /*---------------------------------------------------------------------------------------------------------*/

    /* Init UART                                                                                               */

    /*---------------------------------------------------------------------------------------------------------*/

    /* Reset UART module */

    SYS_ResetModule(UART0_RST);



    /* Configure UART0 and set UART0 Baudrate */

    UART_Open(UART0, 115200);

}



/*---------------------------------------------------------------------------------------------------------*/

/*  MAIN function                                                                                          */

/*---------------------------------------------------------------------------------------------------------*/

int main(void)

{

    S_RTC_TIME_DATA_T sWriteRTC, sReadRTC;



    /* Unlock protected registers */

    SYS_UnlockReg();



    /* Init System, peripheral clock and multi-function I/O */

    SYS_Init();



    /* Lock protected registers */

    SYS_LockReg();



    /* Init UART0 for printf */

    UART0_Init();



    printf("\n\nCPU [url=home.php?mod=space&uid=72445]@[/url] %dHz\n", SystemCoreClock);

    printf("+-------------------------------------+\n");

    printf("|    RTC Alarm Wake-up Sample Code    |\n");

    printf("+-------------------------------------+\n\n");



    /* Enable RTC NVIC */

    NVIC_EnableIRQ(RTC_IRQn);



    /* Open RTC */

    sWriteRTC.u32Year       = 2014;

    sWriteRTC.u32Month      = 5;

    sWriteRTC.u32Day        = 15;

    sWriteRTC.u32DayOfWeek  = RTC_THURSDAY;

    sWriteRTC.u32Hour       = 23;

    sWriteRTC.u32Minute     = 59;

    sWriteRTC.u32Second     = 50;

    sWriteRTC.u32TimeScale  = RTC_CLOCK_24;

    RTC_Open(&sWriteRTC);



    /* Set RTC alarm date/time */

    sWriteRTC.u32Year       = 2014;

    sWriteRTC.u32Month      = 5;

    sWriteRTC.u32Day        = 15;

    sWriteRTC.u32DayOfWeek  = RTC_THURSDAY;

    sWriteRTC.u32Hour       = 23;

    sWriteRTC.u32Minute     = 59;

    sWriteRTC.u32Second     = 55;

    RTC_SetAlarmDateAndTime(&sWriteRTC);



    /* Enable RTC alarm interrupt and wake-up function will be enabled also */

    RTC_EnableInt(RTC_INTEN_ALMIEN_Msk);



    printf("# Set RTC current date/time: 2014/05/15 23:59:50.\n");

    printf("# Set RTC alarm date/time:   2014/05/15 23:59:55.\n");

    printf("# Wait system waken-up by RTC alarm interrupt event.\n");



    g_u8IsRTCAlarmINT = 0;



    /* System enter to Power-down */

    /* To program PWRCTL register, it needs to disable register protection first. */

    SYS_UnlockReg();

    printf("\nSystem enter to power-down mode ...\n");

    /* To check if all the debug messages are finished */

    while(IsDebugFifoEmpty() == 0);

    CLK_PowerDown();



    while(g_u8IsRTCAlarmINT == 0);



    /* Read current RTC date/time */

    RTC_GetDateAndTime(&sReadRTC);

    printf("System has been waken-up and current date/time is:\n");

    printf("    %d/%02d/%02d %02d:%02d:%02d\n",

           sReadRTC.u32Year, sReadRTC.u32Month, sReadRTC.u32Day, sReadRTC.u32Hour, sReadRTC.u32Minute, sReadRTC.u32Second);





    printf("\n\n");

    printf("# Set next RTC alarm date/time: 2014/05/16 00:00:05.\n");

    printf("# Wait system waken-up by RTC alarm interrupt event.\n");

    RTC_SetAlarmDate(2014, 05, 16);

    RTC_SetAlarmTime(0, 0, 5, RTC_CLOCK_24, 0);



    g_u8IsRTCAlarmINT = 0;



    /* System enter to Power-down */

    /* To program PWRCTL register, it needs to disable register protection first. */

    SYS_UnlockReg();

    printf("\nSystem enter to power-down mode ...\n");

    /* To check if all the debug messages are finished */

    while(IsDebugFifoEmpty() == 0);

    CLK_PowerDown();



    while(g_u8IsRTCAlarmINT == 0);



    /* Read current RTC date/time */

    RTC_GetDateAndTime(&sReadRTC);

    printf("System has been waken-up and current date/time is:\n");

    printf("    %d/%02d/%02d %02d:%02d:%02d\n",

           sReadRTC.u32Year, sReadRTC.u32Month, sReadRTC.u32Day, sReadRTC.u32Hour, sReadRTC.u32Minute, sReadRTC.u32Second);



    while(1);

}



/*** (C) COPYRIGHT 2013~2015 Nuvoton Technology Corp. ***/