M261的Blink操作

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

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

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

 * [url=home.php?mod=space&uid=247401]@brief[/url]    A simple demo for NuTiny-M261 board to show message from UART5 to ICE VCOM.

 *

 *

 * [url=home.php?mod=space&uid=17282]@CopyRight[/url] (C) 2019 Nuvoton Technology Corp. All rights reserved.

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

#include <stdio.h>

#include "NuMicro.h"

#include "clk.h"

#include "uart.h"

#include "gpio.h"

#include "sys.h"



#define LED_INIT()  {PB->MODE = (PB->MODE &(~(0xf << 10*2))) | (0x5 << 10 * 2);}

#define LED_RED     PB10





void SYS_Init(void)

{





    /* Enable PLL */

    CLK->PLLCTL = CLK_PLLCTL_128MHz_HIRC;



    /* Waiting for PLL stable */

    while((CLK->STATUS & CLK_STATUS_PLLSTB_Msk) == 0);



    /* Set HCLK divider to 2 */

    CLK->CLKDIV0 = (CLK->CLKDIV0 & (~CLK_CLKDIV0_HCLKDIV_Msk)) | 1;



    /* Switch HCLK clock source to PLL */

    CLK->CLKSEL0 = (CLK->CLKSEL0 & (~CLK_CLKSEL0_HCLKSEL_Msk)) | CLK_CLKSEL0_HCLKSEL_PLL;



    /* Select IP clock source */

    CLK->CLKSEL1 = CLK_CLKSEL1_UART0SEL_HIRC;



    /* Enable IP clock */

    CLK->APBCLK0 |= CLK_APBCLK0_UART0CKEN_Msk;





    /* Update System Core Clock */

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

    //SystemCoreClockUpdate();

    PllClock        = 128000000;            // PLL

    SystemCoreClock = 128000000 / 2;        // HCLK

    CyclesPerUs     = 64000000 / 1000000;   // For SYS_SysTickDelay()



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

    /* Init I/O Multi-function                                                                                 */

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

    /* Set multi-function pins for UART0 RXD and TXD */

    SYS->GPB_MFPH = (SYS->GPB_MFPH & (~(UART0_RXD_PB12_Msk | UART0_TXD_PB13_Msk))) | UART0_RXD_PB12 | UART0_TXD_PB13;



}



void UART0_Init()

{

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

    /* Init UART                                                                                               */

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

    UART0->LINE = UART_PARITY_NONE | UART_STOP_BIT_1 | UART_WORD_LEN_8;

    UART0->BAUD = UART_BAUD_MODE2 | UART_BAUD_MODE2_DIVIDER(__HIRC, 115200);



}







int main()

{

    SYS_UnlockReg();



    SYS_Init();



    UART0_Init();



    printf("\n");

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

    printf("|              Simple Blinky Demo                                  |\n");

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



    /* Init GPIO for LED toggle */

    LED_INIT();

    LED_RED = 0;

    while(1)

    {

        LED_RED ^= 1;

        CLK_SysTickLongDelay(200000);

        LED_RED ^= 1;

        CLK_SysTickLongDelay(200000);

    }





}



/*** (C) COPYRIGHT 2019 Nuvoton Technology Corp. ***/