//
// Methods
//
internal ApicTimer(Apic apic)
{
this.apic = apic;
SetDivisor(1);
SetOneShot();
SetInterruptEnabled(false);
interrupt = apic.IrqToInterrupt(Apic.TimerIrq);
}
private byte Initialize()
{
if ((ReadRtc(DS1287_D) & DS1287_D_VRT) == 0)
{
DebugStub.Print("RTClock weak or defective power source.\n");
}
rtcBootTime = PullRtcTime();
DebugStub.Print("RTClock::Start()\n");
// Enable and clear interrupts
// NB it may take 500ms for first interrupt to be generated.
WriteRtc(DS1287_B, DS1287_B_UTI);
WriteRtc(DS1287_A, DS1287_A_2HZ);
WriteRtc(DS1287_A, DS1287_A_DIVON | DS1287_A_2HZ);
WriteRtc(DS1287_B, DS1287_B_HF_24H | DS1287_B_DF_BCD | DS1287_B_PIE | DS1287_B_SQWE);
// apic.SetIrqPriority(irq, IrqPriority.High);
apic.EnableIrq(irq);
// Here we wait for the first interrupt to be
// raised, which might be upto 0.5 seconds. This
// wait is based on experience, ie not waiting with
// some boxes (the infamous Ryan's TPM machine for
// instance) leads to the clock interrupt never being
// raised.
while ((ReadRtc(DS1287_C) & DS1287_C_PF) != DS1287_C_PF)
{
// TODO: Break out after 1 second and
// report an error.
}
firstStatus = DS1287_C_PF;
byte ivValue = apic.IrqToInterrupt(irq);
return(ivValue);
}