[技术问答] 新唐MIni54FHC GPIO挂载在哪个时钟源上

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

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

 * [url=home.php?mod=space&uid=895143]@version[/url]  V1.00

 * $Revision: 8 $

 * $Date: 15/10/06 11:22a $

 * [url=home.php?mod=space&uid=247401]@brief[/url]    This sample code demonstrates how to let system enter and exit

 *           deep sleep mode with external interrupt.

 *

 * @note

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

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

#include <stdio.h>

#include "Mini51Series.h"

#include "LCD_Driver.h"





volatile int8_t gi8Key = 1;

char g_strBuf[32] = {0};



void EINT0_IRQHandler(void)

{

    /* Clear P3.2 interrupt flag */

    P3->ISRC = 1 << 2;



    if(P32) {

        /* P3.2 is from low to high */

        gi8Key = 1;

    } else {

        /* P3.2 is from high to low */

        gi8Key = 0;

    }

}



void SYS_Init(void)

{



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

    /* Init System Clock                                                                                       */

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

    /* Unlock protected registers */

    SYS_UnlockReg();



    /* Set P5 multi-function pins for XTAL1 and XTAL2 */

    SYS->P5_MFP &= ~(SYS_MFP_P50_Msk | SYS_MFP_P51_Msk);

    SYS->P5_MFP |= (SYS_MFP_P50_XTAL1 | SYS_MFP_P51_XTAL2);



    /* Enable external 12MHz XTAL, 10kHz */

    CLK->PWRCON &= ~CLK_PWRCON_XTLCLK_EN_Msk;

    CLK->PWRCON |= (0x1 <<     CLK_PWRCON_XTLCLK_EN_Pos); // XTAL12M (HXT) Enabled



    /* Waiting for clock ready */

    CLK_WaitClockReady(CLK_CLKSTATUS_XTL_STB_Msk);



    /* Switch HCLK clock source to XTAL */

    CLK->CLKSEL0 &= ~CLK_CLKSEL0_HCLK_S_Msk;

    CLK->CLKSEL0 |= CLK_CLKSEL0_HCLK_S_XTAL;



    /* Enable IP clock */

    CLK->APBCLK |= CLK_APBCLK_UART_EN_Msk | CLK_APBCLK_SPI_EN_Msk;

    CLK->CLKSEL1 &= ~CLK_CLKSEL1_UART_S_Msk;

    CLK->CLKSEL1 |= (0x0 << CLK_CLKSEL1_UART_S_Pos);// Clock source from external 12 MHz or 32 KHz crystal clock



    /* Update System Core Clock */

    /* User can use SystemCoreClockUpdate() to calculate PllClock, SystemCoreClock and CycylesPerUs automatically. */

    SystemCoreClockUpdate();



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

    /* Init I/O Multi-function                                                                                 */

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

    /* Set P0 multi-function pins for UART RXD and TXD  */

    SYS->P0_MFP &= ~(SYS_MFP_P00_Msk | SYS_MFP_P01_Msk);

    SYS->P0_MFP |= (SYS_MFP_P00_TXD | SYS_MFP_P01_RXD);



    /* Lock protected registers */

    SYS_LockReg();

}



void UART_Init(void)

{



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

    /* Init UART                                                                                               */

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

    UART_Open(UART, 115200);



}





void GPIO_Init(void)

{

    /* Enable debounce function of P3.2 (EINT0) */

    P3->DBEN = (1 << 2);



    /* Set debounce time. it is about 6.4 ms */

    GPIO->DBNCECON = GPIO_DBNCECON_DBCLKSRC_IRC10K | GPIO_DBNCECON_DBCLKSEL_64;



    /* Enable P3.2 to be EINT0 */

    GPIO_EnableInt(P3, 2, GPIO_INT_BOTH_EDGE);

    NVIC_EnableIRQ(EINT0_IRQn);

}





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

/* MAIN function                                                                                           */

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



int main(void)

{

    uint32_t u32Cnt;



    SYS_UnlockReg();

    SYS->P5_MFP = (SYS->P5_MFP & 0x00FFFCFC) | 0x03;  /* P5.1 -> XTAL2, P5.0 -> XTAL1 */

    CLK->PWRCON = CLK_PWRCON_XTL12M | 4 | 8 ;



    /* Init system, IP clock and multi-function I/O */

    SYS_Init();



    /* Init UART for printf */

    UART_Init();



    /* Init SPI and LCD */

    LCD_Init();

    LCD_EnableBackLight();

    LCD_ClearScreen();



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



    LCD_Print(0, "DeepSleep");



    /*Initialize external interrupt*/

    GPIO_Init();



    /*

        P3.2 is used as EINT0 for deep sleep (power down) control.

        Press P3.2 will toggle power down/wakeup state to show how to enter power down.

    */

    LCD_Print(1, "Press INT ");



    while (1) {

        char strClearVal[15] = "Count:         ";

        /* Enter power when key change from low to high */

        u32Cnt = 0;

        while (gi8Key == 1) {

            sprintf(g_strBuf, "Count:%d", u32Cnt++);

            LCD_Print(3, strClearVal);

            LCD_Print(3, g_strBuf);

        }

        while(gi8Key == 0) {

            sprintf(g_strBuf, "Count:%d", u32Cnt++);

            LCD_Print(3, strClearVal);

            LCD_Print(3, g_strBuf);

        }



        LCD_Print(2, "Deep Sleeping...");



        /* Unlock protected registers */

        SYS_UnlockReg();



        /* We need to disable debounce function before power down, otherwise, there would be twice interrupt when

           wakeup */

        P3->DBEN = 0;



        /* enter power down */;

        CLK_PowerDown();



        /* Re-enable debounce function if necessary */

        P3->DBEN = (1 << 2);



        LCD_Print(2, "Working...      ");

        printf("\nWorking... \n");



        /* Make sure the key is return to high before next key action */

        while (gi8Key == 0);



        gi8Key = 0;

    }

}