WDT.rar_LPC1114_LPC1114 WDT

/***************************************************************************** * wdt.c: Watchdog C file for NXP LPC11xx Family Microprocessors * * Copyright(C) 2008, NXP Semiconductor * All rights reserved. * * History * 2008.07.20 ver 1.00 Prelimnary version, first Release * *****************************************************************************/ #include "LPC11xx.h" /* LPC11xx Peripheral Registers */ #include "wdt.h" volatile uint32_t wdt_counter; /***************************************************************************** ** Function name: WDTHandler ** ** Descriptions: Watchdog timer interrupt handler ** ** parameters: None ** Returned value: None ** *****************************************************************************/ void WDT_IRQHandler(void) { LPC_WDT->MOD &= ~WDTOF; /* clear the time-out flag */ /* Please note, the sequence here is crucial. */ LPC_WDT->MOD &= ~WDINT; /* Then, clear the interrupt flag */ wdt_counter++; } /***************************************************************************** ** Function name: WDTInit ** ** Descriptions: Initialize watchdog timer, install the ** watchdog timer interrupt handler ** ** parameters: None ** Returned value: None ** *****************************************************************************/ void WDTInit( void ) { /* Enable clock to WDT */ LPC_SYSCON->SYSAHBCLKCTRL |= (1<<15); wdt_counter = 0; /* Enable the WDT Interrupt */ NVIC_EnableIRQ(WDT_IRQn); LPC_WDT->TC = WDT_FEED_VALUE; /* once WDEN is set, the WDT will start after feeding */ // LPC_WDT->MOD = WDEN | WDRESET; LPC_WDT->MOD = WDEN; LPC_WDT->FEED = 0xAA; /* Feeding sequence */ LPC_WDT->FEED = 0x55; return; } /***************************************************************************** ** Function name: WDTFeed ** ** Descriptions: Feed watchdog timer to prevent it from timeout ** ** parameters: None ** Returned value: None ** *****************************************************************************/ void WDTFeed( void ) { LPC_WDT->FEED = 0xAA; /* Feeding sequence */ LPC_WDT->FEED = 0x55; return; } /****************************************************************************** ** End Of File ******************************************************************************/