public CrystalTimer(Quartz32768HzCrystal master, Scheduler scheduler, int timerNumber)
{
switch (timerNumber)
{
case 1:
InterruptId = Calculator.InterruptId.CrystalTimer1;
break;
case 2:
InterruptId = Calculator.InterruptId.CrystalTimer2;
break;
case 3:
InterruptId = Calculator.InterruptId.CrystalTimer3;
break;
default:
throw new ArgumentOutOfRangeException("timerNumber must be between 1 and 3");
}
TimerNumber = timerNumber;
MasterTimer = master;
//Oscillation = new EventHandler(DoTick);
Scheduler = scheduler;
NextWtIncrement = new Scheduler.WallTimeEvent();
NextWtIncrement.Tag = "Crystal timer " + timerNumber.ToString() + " wall-time tick";
NextWtIncrement.Handler = new EventHandler <Scheduler.WallTimeEvent>(DoTickWt);
NextScIncrement = new Scheduler.SystemClockEvent();
NextScIncrement.Tag = "Crystal timer " + timerNumber.ToString() + " clock-time tick";
NextScIncrement.Handler = new EventHandler <Scheduler.SystemClockEvent>(DoTickSc);
//Scheduler.EnqueueRelativeEvent(NextWtIncrement, 1.0 / 32768);
}
private void DoTickSc(object sender, Scheduler.SystemClockEvent e)
{
// TODO: This won't count correctly when the rate is faster than each CPU instruction
unchecked
{
if (--count == 0)
{
if (MissedLoop)
{
count = 255;
}
else
{
count = InitialCount;
}
if (Loop)
{
MissedLoop = true;
Scheduler.EnqueueRelativeEvent(e, ScPeriod);
}
else
{
IsActive = false;
}
if (GenerateInterrupt)
{
HasInterrupt = true;
}
HasExpired = true;
}
else
{
Scheduler.EnqueueRelativeEvent(e, ScPeriod);
}
}
}