- /**************************************************************************//**
- * [url=home.php?mod=space&uid=288409]@file[/url] main.c
- * [url=home.php?mod=space&uid=895143]@version[/url] V2.10
- * $Date: 15/10/12 8:06p $
- * [url=home.php?mod=space&uid=247401]@brief[/url] Shows the usage of GPIO interrupt function.
- *
- * @note
- * Copyright (C) 2012 Nuvoton Technology Corp. All rights reserved.
- *
- ******************************************************************************/
- #include <stdio.h>
- #include "mini51series.h"
- #include "GPIO.h"
- /**
- * @brief Port0/Port1 IRQ
- *
- * @param None
- *
- * [url=home.php?mod=space&uid=266161]@return[/url] None
- *
- * [url=home.php?mod=space&uid=1543424]@Details[/url] The Port0/Port1 default IRQ, declared in startup_Mini51.s.
- */
- void GPIO01_IRQHandler(void)
- {
- /* To check if P1.5 interrupt occurred */
- if (P1->ISRC & BIT5) {
- P1->ISRC = BIT5;
- printf("P1.5 INT occurred. \n");
- } else {
- /* Un-expected interrupt. Just clear all PORT0, PORT1 interrupts */
- P0->ISRC = P0->ISRC;
- P1->ISRC = P1->ISRC;
- printf("Un-expected interrupts. \n");
- }
- }
- /**
- * @brief Port2/Port3/Port4 IRQ
- *
- * @param None
- *
- * @return None
- *
- * @details The Port2/Port3/Port4 default IRQ, declared in startup_Mini51.s.
- */
- void GPIO234_IRQHandler(void)
- {
- /* To check if P2.2 interrupt occurred */
- if (P2->ISRC & BIT2) {
- P2->ISRC = BIT2;
- printf("P2.2 INT occurred. \n");
- } else {
- /* Un-expected interrupt. Just clear all PORT2, PORT3 and PORT4 interrupts */
- P2->ISRC = P2->ISRC;
- P3->ISRC = P3->ISRC;
- P4->ISRC = P4->ISRC;
- printf("Un-expected interrupts. \n");
- }
- }
- void SYS_Init(void)
- {
- /* Unlock protected registers */
- SYS_UnlockReg();
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init System Clock */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Set P5.0 and P5.1 -> XTAL */
- SYS->P5_MFP &= ~(SYS_MFP_P50_Msk | SYS_MFP_P51_Msk);
- SYS->P5_MFP |= (SYS_MFP_P50_XTAL1 | SYS_MFP_P51_XTAL2);
- /* Enable external 12MHz XTAL, internal 22.1184MHz */
- CLK->PWRCON |= CLK_PWRCON_XTL12M | CLK_PWRCON_IRC22M_EN_Msk;
- /* Waiting for clock ready */
- CLK_WaitClockReady(CLK_CLKSTATUS_XTL_STB_Msk | CLK_CLKSTATUS_IRC22M_STB_Msk);
- /* Switch HCLK clock source to XTL */
- CLK_SetHCLK(CLK_CLKSEL0_HCLK_S_XTAL,CLK_CLKDIV_HCLK(1));
- /* STCLK to XTL STCLK to XTL */
- CLK_SetSysTickClockSrc(CLK_CLKSEL0_STCLK_S_XTAL);
- /* Enable IP clock */
- CLK_EnableModuleClock(UART_MODULE);
- /* Select IP clock source */
- CLK_SetModuleClock(UART_MODULE,CLK_CLKSEL1_UART_S_XTAL,CLK_CLKDIV_UART(1));
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init I/O Multi-function */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Set P0 multi-function pins for UART RXD and TXD */
- SYS->P0_MFP &= ~(SYS_MFP_P01_Msk | SYS_MFP_P00_Msk);
- SYS->P0_MFP |= (SYS_MFP_P01_RXD | SYS_MFP_P00_TXD);
- /* Set P3 multi-function pins for Clock Output */
- SYS->P3_MFP = SYS_MFP_P36_CKO;
- /* To update the variable SystemCoreClock */
- SystemCoreClockUpdate();
- /* Lock protected registers */
- SYS_LockReg();
- }
- void UART_Init(void)
- {
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init UART */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Reset IP */
- SYS_ResetModule(SYS_IPRSTC2_UART_RST_Msk);
- /* Configure UART and set UART Baudrate */
- UART_Open(UART, 115200);
- }
- /*---------------------------------------------------------------------------------------------------------*/
- /* MAIN function */
- /*---------------------------------------------------------------------------------------------------------*/
- int main (void)
- {
- /* Init System, IP clock and multi-function I/O */
- SYS_Init(); //In the end of SYS_Init() will issue SYS_LockReg() to lock protected register. If user want to write protected register, please issue SYS_UnlockReg() to unlock protected register.
- /* Init UART for printf */
- UART_Init();
- printf("\n\nCPU [url=home.php?mod=space&uid=72445]@[/url] %dHz\n", SystemCoreClock);
- printf("+----------------------------------------+ \n");
- printf("| MINI51 GPIO Interrupt Sample Code | \n");
- printf("+----------------------------------------+ \n");
- /*-----------------------------------------------------------------------------------------------------*/
- /* GPIO Interrupt Function Test */
- /*-----------------------------------------------------------------------------------------------------*/
- printf("\n P15, P22 are used to test interrupt\n");
- /* Configure P1.5 as Input mode and enable interrupt by rising edge trigger */
- GPIO_SetMode(P1, BIT5, GPIO_PMD_INPUT);
- GPIO_EnableInt(P1, 5, GPIO_INT_RISING);
- NVIC_EnableIRQ(GPIO01_IRQn);
- /* Configure P2.2 as Quasi-bidirection mode and enable interrupt by falling edge trigger */
- GPIO_SetMode(P2, BIT2, GPIO_PMD_QUASI);
- GPIO_EnableInt(P2, 2, GPIO_INT_FALLING);
- NVIC_EnableIRQ(GPIO234_IRQn);
- /* Waiting for interrupts */
- while (1);
- }
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