Graphical Demo - RealTimeClock issue

Hi Guys,

I am trying to get the graphical demo running on my cobra, and am getting an exception here:

if (RealTimeClock.IsTimeValid)
Utility.SetLocalTime(RealTimeClock.GetTime());

It is going on the SetLocalTime:

The thread ‘’ (0x2) has exited with code 0 (0x0).
#### Exception System.ArgumentOutOfRangeException - CLR_E_OUT_OF_RANGE (1) ####
#### Message:
#### System.DateTime::.ctor [IP: 0000] ####
#### GHIElectronics.NETMF.Hardware.RealTimeClock::GetTime [IP: 001e] ####
#### GHIGraphicalDemo.Presentation.Taskbar::.ctor [IP: 0099] ####
#### GHIGraphicalDemo.Presentation.Desktop::.ctor [IP: 011b] ####
#### GHIGraphicalDemo.Program::Main [IP: 0043] ####
A first chance exception of type ‘System.ArgumentOutOfRangeException’ occurred in mscorlib.dll
An unhandled exception of type ‘System.ArgumentOutOfRangeException’ occurred in mscorlib.dll

As A test I did this:

        if (RealTimeClock.IsTimeValid)
        {
          DateTime dtNow = RealTimeClock.GetTime();
        }

This also caused the exception.

So I did this:

        if (RealTimeClock.IsTimeValid)
        {
          RealTimeClock.SetTime(DateTime.Today);
          DateTime dtNow = RealTimeClock.GetTime();
          Utility.SetLocalTime(RealTimeClock.GetTime());
        }

Now everything worked.

So it looks like IsTimeValid can return true even when the DateTime is not valid!

Maybe a bug?

Cheers

Andy

IsTimeValid is to check that the RTC is functional or not but I guess it is possible that the RTC is urning but it is running with the wrong time!

The original code now works having set the rt clock once.

Must have had a bit of garbage in there!

Andy

We have added this to the list, should be able to make it better.

Nice one.

Thanks.

Andy

Problem is back after a power cycle.

Is there a battery somewhere than may be flat?

Cheers

Andy

This is strange. Wrap up the code with try-catch for now and we will look into it

Ok Thanks.

Andy

Andy,

[quote]Problem is back after a power cycle.
Is there a battery somewhere than may be flat?[/quote]

You probably have to added some kind of 3V, i.e 6mm coin battery,

  • to the connector that labeled RTC_VBAT (connector #5 from the top)
    and - to ground,
    in order to keep the time right after you set the time on your Cobra.

Ah, nice thanks for the info.

Andy