M091半主机测试示例

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

 * [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]    Show how to print and get character with IDE console window.

 *

 * SPDX-License-Identifier: Apache-2.0

 * [url=home.php?mod=space&uid=17282]@CopyRight[/url] (C) 2016 Nuvoton Technology Corp. All rights reserved.

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

#include <stdio.h>

#include "NuMicro.h"



# if defined (__GNUC__)

extern void initialise_monitor_handles(void);

#endif



#define PLL_CLOCK           96000000



/**

 *  @brief  Init system clock and I/O multi function .

 *  @param  None

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

 */

void SYS_Init(void)

{

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

    /* Init System Clock                                                                                       */

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

    /* Unlock protected registers */

    SYS_UnlockReg();



    /* Enable HIRC clock (Internal RC 48MHz) */

    CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk);



    /* Wait for HIRC clock ready */

    CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);



    /* Select HCLK clock source as HIRC and HCLK source divider as 1 */

    CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1));



    /* Set PCLK0/PCLK1 to HCLK/2 */

    CLK->PCLKDIV = CLK_PCLKDIV_APB0DIV_DIV1 | CLK_PCLKDIV_APB1DIV_DIV1;





    /* Update System Core Clock */

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

    SystemCoreClockUpdate();





    /* Lock protected registers */

    SYS_LockReg();



}





int32_t main()

{

    int8_t item;



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

    SYS_Init();



#if defined (__GNUC__) && !defined(__ARMCC_VERSION) && defined(OS_USE_SEMIHOSTING)

    initialise_monitor_handles();

#endif



    printf("\n Start SEMIHOST test: \n");



    while(1)

    {

        item = getchar();

        printf("%c\n",item);

    }



}











/*** (C) COPYRIGHT 2016 Nuvoton Technology Corp. ***/