[技术问答] 关于新塘M0519系列的gpio问题

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

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

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

 * $Revision: 4 $

 * $Date: 15/03/19 1:12p $

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

 * @note

 * Copyright (C) 2014 Nuvoton Technology Corp. All rights reserved.

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

#include <stdio.h>

#include "M0519.h"





#define PLL_CLOCK   72000000





void SYS_Init(void)

{

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

    /* Init System Clock                                                                                       */

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



    /* Enable Internal RC 22.1184MHz clock */

    CLK_EnableXtalRC(CLK_PWRCON_OSC22M_EN_Msk);



    /* Waiting for Internal RC clock ready */

    CLK_WaitClockReady(CLK_CLKSTATUS_OSC22M_STB_Msk);



    /* Switch HCLK clock source to Internal RC and HCLK source divide 1 */

    CLK_SetHCLK(CLK_CLKSEL0_HCLK_S_HIRC, CLK_CLKDIV_HCLK(1));



    /* Enable external XTAL 12MHz clock */

    CLK_EnableXtalRC(CLK_PWRCON_XTL12M_EN_Msk);



    /* Waiting for external XTAL clock ready */

    CLK_WaitClockReady(CLK_CLKSTATUS_XTL12M_STB_Msk);



    /* Set core clock as PLL_CLOCK from PLL */

    CLK_SetCoreClock(PLL_CLOCK);



    /* Enable UART module clock */

    CLK_EnableModuleClock(UART0_MODULE);



    /* Select UART module clock source */

    CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART_S_HXT, CLK_CLKDIV_UART(1));



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

    /* Init I/O Multi-function                                                                                 */

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



    /* Set P3 multi-function pins for UART0 RXD and TXD */

    SYS->P3_MFP &= ~(SYS_MFP_P30_Msk | SYS_MFP_P31_Msk);

    SYS->P3_MFP |= (SYS_MFP_P30_UART0_RXD | SYS_MFP_P31_UART0_TXD);



}



void UART0_Init()

{

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

    /* Init UART                                                                                               */

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

    /* Reset UART0 */

    SYS_ResetModule(UART0_RST);



    /* Configure UART0 and set UART0 Baudrate */

    UART_Open(UART0, 115200);

}



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

/* MAIN function                                                                                           */

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

int main(void)

{

    int32_t i32Err;



    /* Unlock protected registers */

    SYS_UnlockReg();



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

    SYS_Init();



    /* Lock protected registers */

    SYS_LockReg();



    /* Init UART0 for printf */

    UART0_Init();



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

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

    printf("|    P1.2(Output) and P5.1(Input) Sample Code     |\n");

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

    printf("  >> Please connect P1.2 and P5.1 first << \n");

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

    getchar();



    /* Set the driving type of PWM output ports which are controlled by GPIO mode register */

    GPIO->PWMPOEN = 0;



    /* Configure P1.2 as Output mode and P5.1 as Input mode */

    GPIO_SetMode(P1, BIT2, GPIO_PMD_OUTPUT);

    GPIO_SetMode(P5, BIT1, GPIO_PMD_INPUT);



    i32Err = 0;

    printf("GPIO P1.2(output mode) connect to P5.1(input mode) ......");



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

    /* Pull P1.2 to Low and check P5.1 status */

    P12 = 0;

    if(P51 != 0)

    {

        i32Err = 1;

    }



    /* Pull P1.2 to High and check P5.1 status */

    P12 = 1;

    if(P51 != 1)

    {

        i32Err = 1;

    }



    if(i32Err)

    {

        printf("  [FAIL].\n");

    }

    else

    {

        printf("  [OK].\n");

    }



    /* Configure P1.2 and P5.1 to default Quasi-bidirectional mode */

    GPIO_SetMode(P1, BIT2, GPIO_PMD_QUASI);

    GPIO_SetMode(P5, BIT1, GPIO_PMD_QUASI);



    while(1);

}



/*** (C) COPYRIGHT 2014 Nuvoton Technology Corp. ***/