--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/navienginebsp/naviengine_assp/watchdog.cpp	Tue Sep 28 18:00:05 2010 +0100
@@ -0,0 +1,136 @@
+/*
+* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  
+* naviengine_assp\naviengine.cpp
+*
+*/
+
+
+
+#include <naviengine_priv.h>
+#include "watchdog.h"
+
+const TInt KWatchdogTimeoutSecs = 5; // the period, in seconds, that the watchdog timer will expire
+
+//
+// Pat the watchdog to prevent the board from resetting
+//
+void TNaviEngineWatchdog::WatchdogTimer(TAny* aPtr)
+	{
+	__KTRACE_OPT(KHARDWARE, Kern::Printf("watchdogTimer expired"));
+	//Kern::Printf("watchdogTimer expired");
+
+	TNaviEngineWatchdog *pDog = (TNaviEngineWatchdog *) aPtr;
+
+	// Pat the Dog now to give us the full period to respond with the timer
+	AsspRegister::Write32(KHwWatchdog_WDTINT, 1);
+
+	// Now queue the timer again so that we can pat it next time around
+	pDog->iWatchdogTimer.Again(NKern::TimerTicks(pDog->iWatchdogTimerPeriodMs));
+	}
+
+
+
+//
+// Constructor
+//
+// We only really need the constructor to create the timer instance.
+//
+TNaviEngineWatchdog::TNaviEngineWatchdog() :
+	iWatchdogTimer(WatchdogTimer,this)
+	{
+	}
+
+
+
+
+// Destructor should never be called
+TNaviEngineWatchdog::~TNaviEngineWatchdog()
+	{
+	__crash();
+	}
+
+
+
+
+/**
+Perform hardware-dependent initialisation
+
+Called by platform independent layer
+*/
+TInt TNaviEngineWatchdog::Create()
+	{
+	__KTRACE_OPT(KEXTENSION,Kern::Printf("TNaviEngineWatchdog::Create"));
+	//Kern::Printf("TNaviEngineWatchdog::Create");
+	SetTimer(KWatchdogTimeoutSecs);
+	return KErrNone;
+	}
+
+
+//
+// Enable/disable the external watchdog timer (eWDT).
+//
+void TNaviEngineWatchdog::SetTimer(TUint aTimeoutInSeconds)
+	{
+	__KTRACE_OPT(KHARDWARE, Kern::Printf(">TNaviEngine::SetWatchdogTimer timeout=%d seconds", aTimeoutInSeconds));
+	//Kern::Printf(">TNaviEngine::SetWatchdogTimer timeout=%d seconds", aTimeoutInSeconds);
+
+	// Disable eWDT
+	AsspRegister::Write32(KHwWatchdog_WDTCNT, 0);
+
+	// If only disabling then we're done
+	if (aTimeoutInSeconds > 0)
+		{
+		// Set the WTD period to something very near the required number 
+		// of seconds (this assumes a 66.666MHz clock)
+		AsspRegister::Write32(KHwWatchdog_WDTSET, (aTimeoutInSeconds*63)<<20);
+		AsspRegister::Write32(KHwWatchdog_WDTTIM, 0);
+
+		// Enable eWDT - start counting
+		AsspRegister::Write32(KHwWatchdog_WDTCNT, 1);
+
+		// Pat the Dog now to give us the full period to respond with the timer
+		AsspRegister::Write32(KHwWatchdog_WDTINT, 1);
+
+		// We have to decide how often to pat the dog, in seconds.
+		// The board will flag a warning after aTimeoutInSeconds, and reset after a further aTimeoutInSeconds.
+		// So we have to fire the watchdog at least every aTimeoutInSeconds to prevent the warning
+		// I've decided that we'll fire 500ms before the alarm to be sure we've patted the dog in time
+		__KTRACE_OPT(KHARDWARE, Kern::Printf("TNaviEngine::SetWatchdogTimer kicking off a timer..."));
+		//Kern::Printf("TNaviEngine::SetWatchdogTimer kicking off a timer...");
+
+		iWatchdogTimerPeriodMs = ((aTimeoutInSeconds * 1000) - 500);
+		iWatchdogTimer.OneShot(NKern::TimerTicks(iWatchdogTimerPeriodMs));
+		}
+	}
+
+
+DECLARE_STANDARD_EXTENSION()
+	{
+	__KTRACE_OPT(KEXTENSION,Kern::Printf("Watchdog: Starting timer service"));
+	//Kern::Printf("Watchdog: Starting timer service");
+
+	// create the watchdog handler
+	TInt r=KErrNoMemory;
+	TNaviEngineWatchdog* pH=new TNaviEngineWatchdog;
+	if (pH)
+		{
+		r=pH->Create();
+		}
+
+	__KTRACE_OPT(KEXTENSION,Kern::Printf("Watchdog: Returns %d",r));
+	//Kern::Printf("Watchdog: Returns %d",r);
+	return r;
+	}
+