Multi-Touch HID code behaving intermittently

[ftariq68]

Hello All:

I am trying to get a Touch Panel that is connected to my windows 7 PC machine working as a Multi-Touch (MT) device.  I test my MT using the MS Paint.  I am able to connect and draw sometime, but once in a while, even after connecting, I am not able to draw on the MS Paint?  Does anyone have any idea where I may be going wrong?  Please help.

thanks

ftariq68

[Jan Axelson]

If you're an end user (not a developer), I would suggest searching the web for help about the specific touch panel.

If you're a developer, here is one link that might be helpful:

http://msdn.microsoft.com/en-us/library/windows/desktop/dd371581%28v=vs.85%29.aspx

Jan

[ftariq68]

Hi Jan:

Thanks for the link.  I will go through it.

I am a developer.  I am developing firmware for a Touch Panel + Touch Screen Controller + Microcontroller.  Essentially I want it to work like a mouse, i.e. just connect it to the USB port of the PC and watch it work.  No driver or GUI should be used.  Windows 7 driver should suffice.  I have put my descriptor in the firmware and it starts up fine most of the time but then it often misreads the gestures.

If you have any other ideas, please do share.

Thanks

Faisal.

[Jan Axelson]

If it's not communicating at all, look in the Control Panel to see if it enumerated successfully.

A hardware-based protocol analyzer will show any errors on the bus.

I often find it helpful to monitor the traffic of a working device.

Jan