- /**************************************************************************//**
- * [url=home.php?mod=space&uid=288409]@file[/url] main.c
- * [url=home.php?mod=space&uid=895143]@version[/url] V3.00
- * $Revision: 8 $
- * $Date: 15/07/02 11:18a $
- * [url=home.php?mod=space&uid=247401]@brief[/url] Demonstrate how to set GPIO pin mode and use pin data input/output control.
- * @note
- * Copyright (C) 2014~2015 Nuvoton Technology Corp. All rights reserved.
- ******************************************************************************/
- #include <stdio.h>
- #include "NUC123.h"
- #define HCLK_CLOCK 72000000
- void SYS_Init(void)
- {
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init System Clock */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Enable XT1_OUT(PF0) and XT1_IN(PF1) */
- SYS->GPF_MFP |= SYS_GPF_MFP_PF0_XT1_OUT | SYS_GPF_MFP_PF1_XT1_IN;
- /* 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 HCLK_CLOCK */
- CLK_SetCoreClock(HCLK_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 GPB multi-function pins for UART0 RXD(PB.0) and TXD(PB.1) */
- SYS->GPB_MFP &= ~(SYS_GPB_MFP_PB0_Msk | SYS_GPB_MFP_PB1_Msk);
- SYS->GPB_MFP |= (SYS_GPB_MFP_PB0_UART0_RXD | SYS_GPB_MFP_PB1_UART0_TXD);
- }
- void UART0_Init()
- {
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init UART */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Reset UART0 module */
- 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("| PB.4(Output) and PC.9(Input) Sample Code |\n");
- printf("+-------------------------------------------------+\n\n");
- /* Configure PB.4 as Output mode and PC.9 as Input mode */
- GPIO_SetMode(PB, BIT4, GPIO_PMD_OUTPUT);
- GPIO_SetMode(PC, BIT9, GPIO_PMD_INPUT);
- i32Err = 0;
- printf("GPIO PB.4(output mode) connect to PC.9(input mode) ......");
- /* Use Pin Data Input/Output Control to pull specified I/O or get I/O pin status */
- /* Pull PB.4 to Low and check PC.9 status */
- PB4 = 0;
- if(PC9 != 0)
- {
- i32Err = 1;
- }
- /* Pull PB.4 to High and check PC.9 status */
- PB4 = 1;
- if(PC9 != 1)
- {
- i32Err = 1;
- }
- if(i32Err)
- {
- printf(" [FAIL].\n");
- }
- else
- {
- printf(" [OK].\n");
- }
- /* Configure PB.4 and PC.9 to default Quasi-bidirectional mode */
- GPIO_SetMode(PB, BIT4, GPIO_PMD_QUASI);
- GPIO_SetMode(PC, BIT9, GPIO_PMD_QUASI);
- while(1);
- }
- /*** (C) COPYRIGHT 2014~2015 Nuvoton Technology Corp. ***/
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