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        Serial Port Solution >> Virtual Serial Port Kit >> Problem with the virtual serial port driver
        
(Message started by: Burkhard on Jan 10th, 2005, 6:59am)
Title: Problem with the virtual serial port driver
Post by Burkhard on Jan 10th, 2005, 6:59am
Hello,
I have connected 4 Application with your Virtual Comport Driver. The base application have to handled 4 Comports, the others emulates external Devices which are connected with the base application.

Sometimes if i send data via the virtual comport, the data is not received by the other application. If i try this via two real comports between two PC's, there's no problem.

What's the reason?
Thank you for your help.

Greets Burkhi from Germany
Title: Re: Problem with the virtual serial port driver
Post by Andrew on Jan 11th, 2005, 7:33am
We have not such problem. Would be more easy to debug this problem if we could replicate your exact situation. Is it possible to receive your base application together with emulators so we could test all in our lab?
Title: Re: Problem with the virtual serial port driver
Post by Burkhard on Jan 17th, 2005, 6:12am
Dear Andrew,

I have analysed the problem:
I use a simply protocol between the applications. First, the Master sends a character to inform the slave: I will send Data to you.
The slave replys with an other character to inform the master: Now you can send me the Data.

If the slaves doesn't reply, the Master sends the characters again after 400 msec.

I have analysed the logs: Sometimes the slaves receives more than 1 Startcharacter (two or three at the same time).

The reason could be that your drivers application hasn't enough available machine time to sends the data synchronosly to the slave-Application.  

Is it possible to change the priority of your driver Application? This could solve the problem.

Thank you very much
Greetings Burkhard from Germany
Title: Re: Problem with the virtual serial port driver
Post by Andrew on Jan 17th, 2005, 10:55am
We propose you to wait till next version of our Virtual Serial Port Kit where we have revised program driver appreciably. New version will be ready at nearest time (somewhere in week). We will inform you personally.