/**************************************************************************//**
* [url=home.php?mod=space&uid=288409]@file[/url] main.c
* [url=home.php?mod=space&uid=895143]@version[/url] V3.00
* $Revision: 7 $
* $Date: 15/01/16 11:44a $
* [url=home.php?mod=space&uid=247401]@brief[/url] Show the usage of GPIO interrupt function.
* @note
* Copyright (C) 2013 Nuvoton Technology Corp. All rights reserved.
******************************************************************************/
#include <stdio.h>
#include "NUC131.h"
#define PLL_CLOCK 50000000
/**
* @brief GPIO PA/PB IRQ
*
* @param None
*
* [url=home.php?mod=space&uid=266161]@return[/url] None
*
* [url=home.php?mod=space&uid=1543424]@Details[/url] The PA/PB default IRQ, declared in startup_NUC131.s.
*/
void GPAB_IRQHandler(void)
{
/* To check if PB.3 interrupt occurred */
if(GPIO_GET_INT_FLAG(PB, BIT3))
{
GPIO_CLR_INT_FLAG(PB, BIT3);
printf("PB.3 INT occurred.\n");
}
else
{
/* Un-expected interrupt. Just clear all PA, PB interrupts */
PA->ISRC = PA->ISRC;
PB->ISRC = PB->ISRC;
printf("Un-expected interrupts.\n");
}
}
/**
* @brief GPIO PC/PD/PE/PF IRQ
*
* @param None
*
* @return None
*
* @details The PC/PD/PE/PF default IRQ, declared in startup_NUC131.s.
*/
void GPCDEF_IRQHandler(void)
{
/* To check if PE.5 interrupt occurred */
if(GPIO_GET_INT_FLAG(PE, BIT5))
{
GPIO_CLR_INT_FLAG(PE, BIT5);
printf("PE.5 INT occurred.\n");
}
else
{
/* Un-expected interrupt. Just clear all PC, PD, PE and PF interrupts */
PC->ISRC = PC->ISRC;
PD->ISRC = PD->ISRC;
PE->ISRC = PE->ISRC;
PF->ISRC = PF->ISRC;
printf("Un-expected interrupts.\n");
}
}
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 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(void)
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init UART */
/*---------------------------------------------------------------------------------------------------------*/
/* Reset UART0 module */
SYS_ResetModule(UART0_RST);
/* Configure UART0 and set UART0 Baudrate */
UART_Open(UART0, 115200);
}
/*---------------------------------------------------------------------------------------------------------*/
/* MAIN function */
/*---------------------------------------------------------------------------------------------------------*/
int main(void)
{
/* 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("| GPIO PB.3 and PE.5 Interrupt Sample Code |\n");
printf("+------------------------------------------------+\n\n");
/*-----------------------------------------------------------------------------------------------------*/
/* GPIO Interrupt Function Test */
/*-----------------------------------------------------------------------------------------------------*/
printf("PB.3 and PE.5 are used to test interrupt ......\n");
/* Configure PB.3 as Input mode and enable interrupt by rising edge trigger */
GPIO_SetMode(PB, BIT3, GPIO_PMD_INPUT);
GPIO_EnableInt(PB, 3, GPIO_INT_RISING);
NVIC_EnableIRQ(GPAB_IRQn);
/* Configure PE.5 as Quasi-bidirection mode and enable interrupt by falling edge trigger */
GPIO_SetMode(PE, BIT5, GPIO_PMD_QUASI);
GPIO_EnableInt(PE, 5, GPIO_INT_FALLING);
NVIC_EnableIRQ(GPCDEF_IRQn);
/* Waiting for interrupts */
while(1);
}
/*** (C) COPYRIGHT 2013 Nuvoton Technology Corp. ***/
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