Need Help 1-Wire on XPE

Hi,

I have problem to reading from 1-Wire DS1991 that connected to COM2:

My problem is:

I have my shell application that after 1 second window timer delay, launch
my UtilApp.

In my Utillapp I use

1. Call to TMExtendedStartSession - and it is OK

2. Call TMSetup and here I got an error. (The port not ready.

When I run the UtilApp again (double click on UtilApp.exe), the application
read the DS1991 correctly.



I thing that the problem is that my UtilApp run before the system make the
COM2: ready.

I would like to know how I can control that the COM2 is ready before the
UtilApp is started to run.



Thanks,

David.

DavidW wrote:

> I thing that the problem is that my UtilApp run before the system
> make the COM2: ready.
>
> I would like to know how I can control that the COM2 is ready before
> the UtilApp is started to run.

This surprises me as I find that real COM ports are ready very early.

Or is this a USB COM port? that would definitely make a difference.

Anyway, I suggest that from your shell app you attempt to open COM2 in
a loop until it succeeds and then run the main app.

Delphi code, but you should get the idea. :-)

for Loop := 1 to 20
begin
if SuccessOpenPort(Com2) then Break;
Sleep(500);
if Loop = 20 then ShowMessage('Unable to open COM2');
end;



--
- Mike

Thanks Mike,
This is a real COM, The boud is PCM-9375 from Advantch.
David

"Mike Warren" <miwa-not-this-bit@or-this-csas.net.au> wrote in message
news:xn0frmn7qaasay001@news.microsoft.com...
> DavidW wrote:
>
>> I thing that the problem is that my UtilApp run before the system
>> make the COM2: ready.
>>
>> I would like to know how I can control that the COM2 is ready before
>> the UtilApp is started to run.
>
> This surprises me as I find that real COM ports are ready very early.
>
> Or is this a USB COM port? that would definitely make a difference.
>
> Anyway, I suggest that from your shell app you attempt to open COM2 in
> a loop until it succeeds and then run the main app.
>
> Delphi code, but you should get the idea. :-)
>
> for Loop := 1 to 20
> begin
> if SuccessOpenPort(Com2) then Break;
> Sleep(500);
> if Loop = 20 then ShowMessage('Unable to open COM2');
> end;
>
>
>
> --
> - Mike

DavidW wrote:

> This is a real COM, The boud is PCM-9375 from Advantch.

Is it possible to do what I suggested and poll the port from your shell
program until it's available?

At least you could do that as a test that it really is the cause of
your problem.

--
- Mike