/**************************************************************************//**
 * @file     main.c
 * @version  V3.00
 * $Revision: 2 $
 * $Date: 16/10/25 4:29p $
 * @brief    Show how to set GPIO pin mode and use pin data input/output control.
 * @note
 * @copyright SPDX-License-Identifier: Apache-2.0
 *
 * @copyright Copyright (C) 2016 Nuvoton Technology Corp. All rights reserved.
 ******************************************************************************/
#include "stdio.h"
#include "NUC029xGE.h"


#define PLL_CLOCK       72000000


void SYS_Init(void)
{

    /*---------------------------------------------------------------------------------------------------------*/
    /* Init System Clock                                                                                       */
    /*---------------------------------------------------------------------------------------------------------*/

    /* Enable HIRC clock (Internal RC 22.1184MHz) */
    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 clock divider as 1 */
    CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1));

    /* Enable HXT clock (external XTAL 12MHz) */
    CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk);

    /* Wait for HXT clock ready */
    CLK_WaitClockReady(CLK_STATUS_HXTSTB_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 as HXT and UART module clock divider as 1 */
    CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UARTSEL_HXT, CLK_CLKDIV0_UART(1));

    /*---------------------------------------------------------------------------------------------------------*/
    /* Init I/O Multi-function                                                                                 */
    /*---------------------------------------------------------------------------------------------------------*/

    /* Set multi-function pins for UART0 RXD and TXD */
    SYS->GPA_MFPL &= ~(SYS_GPA_MFPL_PA2MFP_Msk | SYS_GPA_MFPL_PA3MFP_Msk);
    SYS->GPA_MFPL |= (SYS_GPA_MFPL_PA3MFP_UART0_RXD | SYS_GPA_MFPL_PA2MFP_UART0_TXD);

}

void UART0_Init()
{
    /*---------------------------------------------------------------------------------------------------------*/
    /* Init UART                                                                                               */
    /*---------------------------------------------------------------------------------------------------------*/
    /* Reset UART0 */
    SYS_ResetModule(UART0_RST);

    /* Configure UART0 and set UART0 baud rate */
    UART_Open(UART0, 115200);
}

/*---------------------------------------------------------------------------------------------------------*/
/*  Main Function                                                                                          */
/*---------------------------------------------------------------------------------------------------------*/
int32_t main(void)
{

    int32_t i32Err, i32TimeOutCnt;

    /* 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 @ %d Hz\n", SystemCoreClock);
    printf("+-------------------------------------------------+\n");
    printf("|    PB.2(Output) and PE.11(Input) Sample Code    |\n");
    printf("+-------------------------------------------------+\n\n");

    /*-----------------------------------------------------------------------------------------------------*/
    /* GPIO Basic Mode Test --- Use Pin Data Input/Output to control GPIO pin                              */
    /*-----------------------------------------------------------------------------------------------------*/
    printf("  >> Please connect PB.2 and PE.11 first << \n");
    printf("     Press any key to start test by using [Pin Data Input/Output Control] \n\n");
    getchar();

    /* Configure PB.2 as Output mode and PE.11 as Input mode then close it */
    GPIO_SetMode(PB, BIT2, GPIO_MODE_OUTPUT);
    GPIO_SetMode(PE, BIT11, GPIO_MODE_INPUT);

    i32Err = 0;
    printf("GPIO PB.2(output mode) connect to PE.11(input mode) ......");

    /* Use Pin Data Input/Output Control to pull specified I/O or get I/O pin status */
    /* Set PB.2 output pin value is low */
    PB2 = 0;

    /* Set time out counter */
    i32TimeOutCnt = 100;

    /* Wait for PE.11 input pin status is low for a while */
    while(PE11 != 0)
    {
        if(i32TimeOutCnt > 0)
        {
            i32TimeOutCnt--;
        }
        else
        {
            i32Err = 1;
            break;
        }
    }

    /* Set PB.2 output pin value is high */
    PB2 = 1;

    /* Set time out counter */
    i32TimeOutCnt = 100;

    /* Wait for PE.11 input pin status is high for a while */
    while(PE11 != 1)
    {
        if(i32TimeOutCnt > 0)
        {
            i32TimeOutCnt--;
        }
        else
        {
            i32Err = 1;
            break;
        }
    }

    /* Print test result */
    if(i32Err)
    {
        printf("  [FAIL].\n");
    }
    else
    {
        printf("  [OK].\n");
    }

    /* Configure PB.2 and PE.11 to default Quasi-bidirectional mode */
    GPIO_SetMode(PB, BIT2, GPIO_MODE_QUASI);
    GPIO_SetMode(PE, BIT11, GPIO_MODE_QUASI);

    while(1);

}
