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Non-blocking clear() and reboot() method #8

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Non-blocking clear() and reboot() method #8

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929e285
Update WDTZero.h
SokoFromNZ Oct 15, 2020
b1c3ad7
Update WDTZero.cpp
SokoFromNZ Oct 15, 2020
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24 changes: 18 additions & 6 deletions WDTZero/src/WDTZero.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -86,17 +86,29 @@ WDTZeroCounter = _ewtcounter; // SET Software EWT counter - used in I
}

void WDTZero::clear() {
WDT->CLEAR.reg = WDT_CLEAR_CLEAR_KEY; // Clear WTD bit
while(WDT->STATUS.bit.SYNCBUSY);
WDTZeroCounter = _ewtcounter; // Reset the early warning downcounter value
if (WDT->STATUS.bit.SYNCBUSY == false)
{ // synchronization is not busy, meaning it is synchronized
WDT->CLEAR.reg = WDT_CLEAR_CLEAR_KEY; // Clear WDT bit (reset watchdog timer)
WDTZeroCounter = _ewtcounter; // Reset the early warning downcounter value
}
}

void WDTZero::reboot()
{
WDT_ForceShutdown();
}

void WDT_ForceShutdown()
{
WDT->CLEAR.reg = 0xFF; // value different than WDT_CLEAR_CLEAR_KEY causes reset
while (true);
}

void WDT_Handler(void) { // ISR for watchdog early warning, DO NOT RENAME!, need to clear
WDTZeroCounter--; // EWT down counter, makes multi cycle WDT possible
if (WDTZeroCounter<=0) { // Software EWT counter run out of time : Reset
if (WDT_Shutdown != NULL) WDT_Shutdown(); // run extra Shutdown functions if defined
WDT->CLEAR.reg = 0xFF; // value different than WDT_CLEAR_CLEAR_KEY causes reset
while(true);
WDT_ForceShutdown();
}
else {
WDT->INTFLAG.bit.EW = 1; // Clear INT EW Flag
Expand All @@ -113,4 +125,4 @@ void WDTZero::attachShutdown(voidFuncPtr callback)
void WDTZero::detachShutdown()
{
WDT_Shutdown = NULL;
}
}
2 changes: 2 additions & 0 deletions WDTZero/src/WDTZero.h
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Expand Up @@ -48,6 +48,7 @@
# define WDT_SOFTCYCLE16M 0xF4BA // EW on, @8192cycles/1024 x 2^7 = 1024S " 111 1 -> 17 minutes to be precise ...


void WDT_ForceShutdown(void); // Global Method for immediate shutdown
void WDT_Handler(void); // ISR HANDLER FOR WDT EW INTERRUPT
extern int WDTZeroCounter; // SOFT COUNTER FOR EXTENDING WDT TIME VIA EW INTERRUPT

Expand All @@ -56,6 +57,7 @@ class WDTZero
public:
WDTZero();
void clear();
void reboot();
void setup(unsigned int wdtzerosetup);
void attachShutdown(voidFuncPtr callback);
void detachShutdown();
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