/**************************************************************************//**
* @file main.c
* @version V1.00
* $Date: 14/05/29 1:14p $
* @brief NUC505 General Purpose I/O Driver Sample Code
* Connect PB.10 and PB.11 to test IO In/Out
* Test PB.10 and PB.11 interrupts
*
* @note
* Copyright (C) 2013 Nuvoton Technology Corp. All rights reserved.
*
******************************************************************************/
#include <stdio.h>
#include "NUC505Series.h"
#include "gpio.h"
void EINT0_IRQHandler(void)
{
int32_t u32Flag;
u32Flag = GPIO_GET_INT_FLAG(PB, BIT11);
GPIO->INTSTSA_B = (u32Flag << 16);
/* To avoid the synchronization issue between system and APB clock domain */
u32Flag = GPIO->INTSTSA_B;
printf(" EINT0 interrupt occurred. \n");
}
void SYS_Init(void)
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init System Clock */
/*---------------------------------------------------------------------------------------------------------*/
/* Enable XTAL */
CLK->PWRCTL |= CLK_PWRCTL_HXTEN_Msk;
CLK_SetCoreClock(96000000);
/* Set PCLK divider */
CLK_SetModuleClock(PCLK_MODULE, NULL, 1);
/* Update System Core Clock */
SystemCoreClockUpdate();
/* Enable IP clock */
CLK_EnableModuleClock(UART0_MODULE);
/* Select IP clock source */
CLK_SetModuleClock(UART0_MODULE, CLK_UART0_SRC_EXT, 0);
/*---------------------------------------------------------------------------------------------------------*/
/* Init I/O Multi-function */
/*---------------------------------------------------------------------------------------------------------*/
/* Configure multi-function pins for UART0 RXD and TXD */
SYS->GPB_MFPL = (SYS->GPB_MFPL & (~SYS_GPB_MFPL_PB0MFP_Msk) ) | SYS_GPB_MFPL_PB0MFP_UART0_TXD;
SYS->GPB_MFPL = (SYS->GPB_MFPL & (~SYS_GPB_MFPL_PB1MFP_Msk) ) | SYS_GPB_MFPL_PB1MFP_UART0_RXD;
}
/*---------------------------------------------------------------------------------------------------------*/
/* MAIN function */
/*---------------------------------------------------------------------------------------------------------*/
int main (void)
{
int32_t i32Err;
/* Init System, IP clock and multi-function I/O */
SYS_Init();
/* Init UART to 115200-8n1 for print message */
UART_Open(UART0, 115200);
printf("\n\nCPU @ %dHz\n", SystemCoreClock);
printf("+-------------------------------------+ \n");
printf("| GPIO Driver Sample Code | \n");
printf("+-------------------------------------+ \n");
/*-----------------------------------------------------------------------------------------------------*/
/* GPIO Basic Mode Test --- Use Pin Data Input/Output to control GPIO pin */
/*-----------------------------------------------------------------------------------------------------*/
printf(" >> Please connect PB.10 and PB.11 first << \n");
printf(" Press any key to start test by using [Pin Data Input/Output Control] \n\n");
getchar();
/* Configure PB.10 as Output mode and PB.11 as Input mode pull up enable then close it */
GPIO_SetMode(PB, BIT10, GPIO_MODE_OUTPUT);
GPIO_SetMode(PB, BIT11, GPIO_MODE_INPUT);
GPIO_SetPullMode(PB, BIT11, GPIO_PULL_UP_EN);
i32Err = 0;
printf(" GPIO Output/Input test ...... \n");
/* Use Pin Data Input/Output Control to pull specified I/O or get I/O pin status */
PB10_DOUT = 0;
if (PB11_PIN != 0) {
i32Err = 1;
}
PB10_DOUT = 1;
if (PB11_PIN != 1) {
i32Err = 1;
}
if ( i32Err ) {
printf(" [FAIL] --- Please make sure PB.10 and PB.11 are connected. \n");
} else {
printf(" [OK] \n");
}
/* Configure PB.10 and PB.11 to default input mode */
GPIO_SetMode(PB, BIT10, GPIO_MODE_INPUT);
GPIO_SetMode(PB, BIT11, GPIO_MODE_INPUT);
/*-----------------------------------------------------------------------------------------------------*/
/* GPIO Interrupt Function Test */
/*-----------------------------------------------------------------------------------------------------*/
printf("\n PB10 and PB11 are used to test interrupt\n");
/* Configure PB.10 as Output mode */
PB10_DOUT = 0;
GPIO_SetMode(PB, BIT10, GPIO_MODE_OUTPUT);
/* Configure PB11 as Input mode and enable interrupt by rising edge trigger */
GPIO_SetMode(PB, BIT11, GPIO_MODE_INPUT);
GPIO_EnableInt(PB, 11, GPIO_INT_RISING);
/* Enable interrupt de-bounce function and select de-bounce sampling cycle time */
GPIO_SET_DEBOUNCE_TIME(NULL, GPIO_DBCTL_DBCLKSEL_128);
GPIO_ENABLE_DEBOUNCE(PB, GPIO_DBCTL_EINT0_DBEN_MASK);
/* Configure PB11 as EINT0 */
GPIO_SetIntGroup(PB, 11, GPIO_INTSRCGP_EINT0);
NVIC_EnableIRQ(EINT0_IRQn);
PB10_DOUT = 1;
/* Waiting for interrupts */
while (1);
}
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