Reza Mashayekhi / WatchdogTimer

https://os.mbed.com/cookbook/WatchDog-Timer This link has demonstrated a way to implement Watchdog Timer on Mbed. This library is the library version of that code.

WatchdogTimer.cpp

Committer:
mreda
Date:
2018-02-09
Revision:
2:1b576cfa3f49
Parent:
1:7d0312e56c87

File content as of revision 2:1b576cfa3f49:

#include "mbed.h"
#include "WatchdogTimer.h"


// "kick" or "feed" the dog - reset the watchdog timer
// by writing this required bit pattern
void WatchdogTimer::kick() {
    LPC_WDT->WDFEED = 0xAA;
    LPC_WDT->WDFEED = 0x55;
}
// Load timeout value in watchdog timer and enable
void WatchdogTimer::kick(float timeInSecond) {
    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 = timeInSecond * (float)clk;
    LPC_WDT->WDMOD = 0x3;                   // Enabled and Reset
    kick();
}