[技术问答] 【NuMaker-M471测评】+软件及资料下载

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

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

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

 * [url=home.php?mod=space&uid=247401]@brief[/url]    Show how to set GPIO pin mode and use pin data input/output control.

 *

 * SPDX-License-Identifier: Apache-2.0

 * [url=home.php?mod=space&uid=17282]@CopyRight[/url] (C) 2020 Nuvoton Technology Corp. All rights reserved.

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

#include "stdio.h"

#include "NuMicro.h"





void SYS_Init(void)

{

    /* Unlock protected registers */

    SYS_UnlockReg();



    /* Set XT1_OUT(PF.2) and XT1_IN(PF.3) to input mode */

    PF->MODE &= ~(GPIO_MODE_MODE2_Msk | GPIO_MODE_MODE3_Msk);



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

    CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk);



    /* Wait for HIRC clock ready */

    CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);



    /* Set core clock as 96MHz from PLL */

    CLK_SetCoreClock(FREQ_96MHZ);



    /* Set PCLK0/PCLK1 to HCLK/2 */

    CLK->PCLKDIV = (CLK_PCLKDIV_APB0DIV_DIV2 | CLK_PCLKDIV_APB1DIV_DIV2);



    /* Enable UART clock */

    CLK_EnableModuleClock(UART0_MODULE);



    /* Select UART clock source from HIRC */

    CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART0SEL_HIRC, CLK_CLKDIV0_UART0(1));



    /* Update System Core Clock */

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

    SystemCoreClockUpdate();



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

    /* Init I/O Multi-function                                              */

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

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

    SYS->GPB_MFPH = (SYS->GPB_MFPH & ~(SYS_GPB_MFPH_PB12MFP_Msk | SYS_GPB_MFPH_PB13MFP_Msk)) |

                    (SYS_GPB_MFPH_PB12MFP_UART0_RXD | SYS_GPB_MFPH_PB13MFP_UART0_TXD);



    /* Lock protected registers */

    SYS_LockReg();

}



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

/* Init UART0                                                           */

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

void UART0_Init(void)

{

    /* Reset UART0 */

    SYS_ResetModule(UART0_RST);



    /* Configure UART0 and set UART0 baud rate */

    UART_Open(UART0, 115200);

}



int32_t main(void)

{

    int32_t i32Err, i32TimeOutCnt;



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

    SYS_Init();



    /* Init UART0 for printf */

    UART0_Init();



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



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

    printf("|    PB.3(Output) and PC.1(Input) Sample Code     |\n");

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



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

    /* GPIO Basic Mode Test --- Use Pin Data Input/Output to control GPIO pin                              */

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

    printf("  >> Please connect PB.3 and PC.1 first << \n");

    printf("     Press any key to start test by using [Pin Data Input/Output Control] \n\n");

    getchar();



    /* Configure PB.3 as Output mode and PC.1 as Input mode then close it */

    GPIO_SetMode(PB, BIT3, GPIO_MODE_OUTPUT);

    GPIO_SetMode(PC, BIT1, GPIO_MODE_INPUT);



    i32Err = 0;

    printf("GPIO PB.3(output mode) connect to PC.1(input mode) ......");



    /* Use Pin Data Input/Output Control to pull specified I/O or get I/O pin status */

    /* Set PB.3 output pin value is low */

    PB3 = 0;



    /* Set time out counter */

    i32TimeOutCnt = 100;



    /* Wait for PC.1 input pin status is low for a while */

    while(PC1 != 0)

    {

        if(i32TimeOutCnt > 0)

        {

            i32TimeOutCnt--;

        }

        else

        {

            i32Err = 1;

            break;

        }

    }



    /* Set PB.3 output pin value is high */

    PB3 = 1;



    /* Set time out counter */

    i32TimeOutCnt = 100;



    /* Wait for PC.1 input pin status is high for a while */

    while(PC1 != 1)

    {

        if(i32TimeOutCnt > 0)

        {

            i32TimeOutCnt--;

        }

        else

        {

            i32Err = 1;

            break;

        }

    }



    /* Print test result */

    if(i32Err)

    {

        printf("  [FAIL].\n");

    }

    else

    {

        printf("  [OK].\n");

    }



    /* Configure PB.3 and PC.1 to default Quasi-bidirectional mode */

    GPIO_SetMode(PB, BIT3, GPIO_MODE_QUASI);

    GPIO_SetMode(PC, BIT1, GPIO_MODE_QUASI);



    while(1);

}