- /**************************************************************************//**
- * [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: 15/09/02 10:04a $
- * [url=home.php?mod=space&uid=247401]@brief[/url] Show the usage of GPIO interrupt function.
- * @note
- * Copyright (C) 2013~2015 Nuvoton Technology Corp. All rights reserved.
- ******************************************************************************/
- #include <stdio.h>
- #include "M451Series.h"
- #define PLLCTL_SETTING CLK_PLLCTL_72MHz_HXT
- #define PLL_CLOCK 72000000
- /**
- * @brief GPIO PB IRQ
- *
- * @param None
- *
- * [url=home.php?mod=space&uid=266161]@return[/url] None
- *
- * [url=home.php?mod=space&uid=1543424]@Details[/url] The PB default IRQ, declared in startup_M451Series.s.
- */
- void GPB_IRQHandler(void)
- {
- /* To check if PB.2 interrupt occurred */
- if(GPIO_GET_INT_FLAG(PB, BIT2))
- {
- GPIO_CLR_INT_FLAG(PB, BIT2);
- printf("PB.2 INT occurred.\n");
- }
- else
- {
- /* Un-expected interrupt. Just clear all PB interrupts */
- PB->INTSRC = PB->INTSRC;
- printf("Un-expected interrupts.\n");
- }
- }
- /**
- * @brief GPIO PC IRQ
- *
- * @param None
- *
- * @return None
- *
- * @details The PC default IRQ, declared in startup_M451Series.s.
- */
- void GPC_IRQHandler(void)
- {
- /* To check if PC.5 interrupt occurred */
- if(GPIO_GET_INT_FLAG(PC, BIT5))
- {
- GPIO_CLR_INT_FLAG(PC, BIT5);
- printf("PC.5 INT occurred.\n");
- }
- else
- {
- /* Un-expected interrupt. Just clear all PC interrupts */
- PC->INTSRC = PC->INTSRC;
- printf("Un-expected interrupts.\n");
- }
- }
- 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 and HCLK source 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 PD multi-function pins for UART0 RXD(PD.0) and TXD(PD.1) */
- SYS->GPD_MFPL &= ~(SYS_GPD_MFPL_PD0MFP_Msk | SYS_GPD_MFPL_PD1MFP_Msk);
- SYS->GPD_MFPL |= (SYS_GPD_MFPL_PD0MFP_UART0_RXD | SYS_GPD_MFPL_PD1MFP_UART0_TXD);
- }
- void UART0_Init()
- {
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init UART */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Reset UART module */
- SYS_ResetModule(UART0_RST);
- /* Configure UART0 and set UART0 baud rate */
- 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.2 and PC.5 Interrupt Sample Code |\n");
- printf("+------------------------------------------------+\n\n");
- /*-----------------------------------------------------------------------------------------------------*/
- /* GPIO Interrupt Function Test */
- /*-----------------------------------------------------------------------------------------------------*/
- printf("PB.2 and PC.5 are used to test interrupt ......\n");
- /* Configure PB.2 as Input mode and enable interrupt by rising edge trigger */
- GPIO_SetMode(PB, BIT2, GPIO_MODE_INPUT);
- GPIO_EnableInt(PB, 2, GPIO_INT_RISING);
- NVIC_EnableIRQ(GPB_IRQn);
- /* Configure PC.5 as Quasi-bidirection mode and enable interrupt by falling edge trigger */
- GPIO_SetMode(PC, BIT5, GPIO_MODE_QUASI);
- GPIO_EnableInt(PC, 5, GPIO_INT_FALLING);
- NVIC_EnableIRQ(GPC_IRQn);
- /* Enable interrupt de-bounce function and select de-bounce sampling cycle time is 1024 clocks of LIRC clock */
- GPIO_SET_DEBOUNCE_TIME(GPIO_DBCTL_DBCLKSRC_LIRC, GPIO_DBCTL_DBCLKSEL_1024);
- GPIO_ENABLE_DEBOUNCE(PB, BIT2);
- GPIO_ENABLE_DEBOUNCE(PC, BIT5);
- /* Waiting for interrupts */
- while(1);
- }
- /*** (C) COPYRIGHT 2013~2015 Nuvoton Technology Corp. ***/
| 
楼主
