/**************************************************************************//**
* [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. ***/
| 
楼主
标题置顶
标题高亮
