Simon's Watchdog code from http://mbed.org/forum/mbed/topic/508/
watchdog.cpp
- Committer:
- tylerjw
- Date:
- 2012-07-24
- Revision:
- 0:daae6c64fbdf
File content as of revision 0:daae6c64fbdf:
/* Copyright (c) 2012 Tyler Weaver, MIT License * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software * and associated documentation files (the "Software"), to deal in the Software without restriction, * including without limitation the rights to use, copy, modify, merge, publish, distribute, * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include "mbed.h" #include "watchdog.h" // Simon's Watchdog code from // http://mbed.org/forum/mbed/topic/508/ // Load timeout value in watchdog timer and enable void Watchdog::kick(float s) { LPC_WDT->WDCLKSEL = 0x1; // Set CLK src to PCLK uint32_t clk = SystemCoreClock / 16; // WD has a fixed /4 prescaler, PCLK default is /4 LPC_WDT->WDTC = s * (float)clk; LPC_WDT->WDMOD = 0x3; // Enabled and Reset kick(); } // "kick" or "feed" the dog - reset the watchdog timer // by writing this required bit pattern void Watchdog::kick() { LPC_WDT->WDFEED = 0xAA; LPC_WDT->WDFEED = 0x55; }