- /**************************************************************************//**
- * [url=home.php?mod=space&uid=288409]@file[/url] main.c
- * [url=home.php?mod=space&uid=895143]@version[/url] V2.00
- * $Revision: 2 $
- * $Date: 14/12/25 10:24a $
- * @brief
- * Show how to generate time-out reset system event while WDT time-out reset delay period expired.
- *
- * @note
- * Copyright (C) 2013 Nuvoton Technology Corp. All rights reserved.
- ******************************************************************************/
- #include <stdio.h>
- #include "M0518.h"
- #define PLL_CLOCK 50000000
- /*---------------------------------------------------------------------------------------------------------*/
- /* Global Interface Variables Declarations */
- /*---------------------------------------------------------------------------------------------------------*/
- volatile uint8_t g_u8IsWDTTimeoutINT = 0;
- /**
- * [url=home.php?mod=space&uid=247401]@brief[/url] IRQ Handler for WDT and WWDT Interrupt
- *
- * @param None
- *
- * [url=home.php?mod=space&uid=266161]@return[/url] None
- *
- * [url=home.php?mod=space&uid=1543424]@Details[/url] The WDT_IRQHandler is default IRQ of WDT and WWDT, declared in startup_M0518.s.
- */
- void WDT_IRQHandler(void)
- {
- if(WDT_GET_TIMEOUT_INT_FLAG() == 1)
- {
- /* Clear WDT time-out interrupt flag */
- WDT_CLEAR_TIMEOUT_INT_FLAG();
- g_u8IsWDTTimeoutINT = 1;
- }
- }
- void SYS_Init(void)
- {
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init System Clock */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Enable HIRC clock */
- CLK_EnableXtalRC(CLK_PWRCON_IRC22M_EN_Msk);
- /* Waiting for HIRC clock ready */
- CLK_WaitClockReady(CLK_CLKSTATUS_IRC22M_STB_Msk);
- /* Switch HCLK clock source to HIRC */
- CLK_SetHCLK(CLK_CLKSEL0_HCLK_S_HIRC, CLK_CLKDIV_HCLK(1));
- /* Enable HXT and LIRC */
- CLK_EnableXtalRC(CLK_PWRCON_XTL12M_EN_Msk | CLK_PWRCON_IRC10K_EN_Msk);
- /* Waiting for clock ready */
- CLK_WaitClockReady(CLK_CLKSTATUS_XTL12M_STB_Msk | CLK_CLKSTATUS_IRC10K_STB_Msk);
- /* Set core clock as PLL_CLOCK from PLL and SysTick source to HCLK/2*/
- CLK_SetCoreClock(PLL_CLOCK);
- CLK_SetSysTickClockSrc(CLK_CLKSEL0_STCLK_S_HCLK_DIV2);
- /* Enable peripheral clock */
- CLK_EnableModuleClock(UART0_MODULE);
- CLK_EnableModuleClock(WDT_MODULE);
- /* Peripheral clock source */
- CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART_S_PLL, CLK_CLKDIV_UART(1));
- CLK_SetModuleClock(WDT_MODULE, CLK_CLKSEL1_WDT_S_LIRC, 0);
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init I/O Multi-function */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Set PB multi-function pins for UART0 RXD, TXD */
- SYS->GPB_MFP = SYS_GPB_MFP_PB0_UART0_RXD | SYS_GPB_MFP_PB1_UART0_TXD;
- }
- void UART0_Init(void)
- {
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init UART */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Reset IP */
- 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();
- if(WDT_GET_RESET_FLAG() == 1)
- {
- /* Use PA.0 to check time-out period time */
- GPIO_SetMode(PA, 0, GPIO_PMD_OUTPUT);
- PA0 = 1;
- WDT_CLEAR_RESET_FLAG();
- printf("*** System has been reset by WDT time-out event ***\n\n");
- while(1);
- }
- printf("CPU [url=home.php?mod=space&uid=72445]@[/url] %d Hz\n", SystemCoreClock);
- printf("+---------------------------------------------+\n");
- printf("| WDT Time-out Reset System Sample Code |\n");
- printf("+---------------------------------------------+\n\n");
- printf("# WDT Settings:\n");
- printf(" - Clock source is 10 kHz \n");
- printf(" - Time-out interval is 2^14 * WDT clock \n");
- printf(" (around 1.6384 second) \n");
- printf(" - Interrupt enable \n");
- printf(" - Reset function enable \n");
- printf(" - Reset delay period is 18 * WDT clock \n");
- printf("# System will generate a WDT time-out interrupt event after around 1.6384 second.\n");
- printf(" (Use PA.0 low period time to check WDT time-out interval)\n");
- printf("# Do not reset WDT counter in WDT_IRQHandler and system will be reset immediately by WDT time-out reset signal.\n\n");
- /* Use PA.0 to check time-out period time */
- GPIO_SetMode(PA, 0, GPIO_PMD_OUTPUT);
- PA0 = 1;
- PA0 = 0;
- /* Because of all bits can be written in WDT Control Register are write-protected;
- To program it needs to disable register protection first. */
- SYS_UnlockReg();
- /* Enable WDT time-out reset function and select time-out interval to 2^14 * WDT clock then start WDT counting */
- g_u8IsWDTTimeoutINT = 0;
- WDT_Open(WDT_TIMEOUT_2POW14, WDT_RESET_DELAY_18CLK, TRUE, FALSE);
- /* Enable WDT interrupt function */
- WDT_EnableInt();
- /* Enable WDT NVIC */
- NVIC_EnableIRQ(WDT_IRQn);
- while(1);
- }
- /*** (C) COPYRIGHT 2013 Nuvoton Technology Corp. ***/
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