NM1200利用定时器自动翻转一个IO

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

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

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

 * $Revision: 2 $

 * $Date: 15/04/08 11:44a $

 * [url=home.php?mod=space&uid=247401]@brief[/url]    Demonstrate the timer 0 toggle out function on pin P3.4.

 *

 * @note

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

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

#include <stdio.h>

#include "NM1200_NM1100.h"



void SYS_Init(void)

{

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

    /* Init System Clock                                                                                       */

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



    /* Unlock protected registers */

    SYS_UnlockReg();



    /* Read User Config to select internal high speed RC */

    SystemInit();



    /* Enable external 12MHz XTAL (UART), and HIRC */

    CLK->PWRCTL = CLK_PWRCTL_XTL12M | CLK_PWRCTL_HIRCEN_Msk;



    /* Waiting for clock ready */

    CLK_WaitClockReady(CLK_STATUS_XTLSTB_Msk | CLK_STATUS_HIRCSTB_Msk);



    /* Enable UART and Timer 0 clock */

    CLK->APBCLK = CLK_APBCLK_UART0CKEN_Msk | CLK_APBCLK_TMR0CKEN_Msk;



    /* Select UART clock source from external crystal*/

    CLK->CLKSEL1 = (CLK->CLKSEL1 & ~CLK_CLKSEL1_UART0SEL_Msk) | CLK_CLKSEL1_UART0SEL_XTAL;



    /* Update System Core Clock */

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

    SystemCoreClockUpdate();





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

    /* Init I/O Multi-function                                                                                 */

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

    /* Set P1 multi-function pins for UART RXD, TXD */

    SYS->P0_MFP = SYS_MFP_P00_TXD | SYS_MFP_P01_RXD;



    /* Set P3 multi-function pins for Timer toggle output pin */

    SYS->P3_MFP = SYS_MFP_P34_T0;



    /* Lock protected registers */

    SYS_LockReg();

}



int main(void)

{

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

       In the end of SYS_Init() will issue SYS_LockReg()

       to lock protected register. If user want to write

       protected register, please issue SYS_UnlockReg()

       to unlock protected register if necessary */

    SYS_Init();



    /* Init UART to 115200-8n1 for print message */

    UART_Open(UART0, 115200);



    printf("\nThis sample code use timer 0 to generate 1kHz toggle output to T0 pin (P3.4) \n");



    /* To generate 1kHZ toggle output, timer frequency must set to 2000Hz.

       Because toggle output state change on every timer timeout event */

    TIMER_Open(TIMER0, TIMER_TOGGLE_MODE, 2000);

    TIMER_Start(TIMER0);



    while(1);

}



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