Jay Cady / WatchdogTimer

Simple implementation of the watchdog timer for NRF51xxx.

Dependents:   WatchdogTimerTest Seeed_Test_Wristband_final mbed-os-PF-UWBBEACON_v1_dev RB-2018-X_MPU_12

WatchdogTimer.cpp

Committer:
jcady92
Date:
2015-06-30
Revision:
0:172aa845e1d7
Child:
1:10fdcb411fbd

File content as of revision 0:172aa845e1d7:

#include "WatchdogTimer.h"

WatchdogTimer::WatchdogTimer(float seconds)
{
    //Configure watchdog timer
    //HALT_Pause: Pause watchdog when debugger stops chip
    //Sleep_Run: Continue running watchdog when chip sleeps
    NRF_WDT->CONFIG = (WDT_CONFIG_HALT_Pause << WDT_CONFIG_HALT_Pos) | ( WDT_CONFIG_SLEEP_Run << WDT_CONFIG_SLEEP_Pos);
    
    //Set watchdog timeout (seconds * clock cycle)
    NRF_WDT->CRV = seconds * (float)NRF_CLK_RATE;
    
    //Enable reload register 0
    NRF_WDT->RREN = WDT_RREN_RR0_Enabled << WDT_RREN_RR0_Pos;
    
    //Start the watchdog timer
    NRF_WDT->TASKS_START = 1;
}

void WatchdogTimer::kick()
{
    //Reload register 0
    NRF_WDT->RR[0] = WDT_RR_RR_Reload;
}