USB touchscreen randomly works then doesn't on every boot

Technical Support
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I am running windows CE and our device has a USB based touchscreen panel. The panel is working along with the drivers as it does register touch, but only half of every boot. Where can I go from here? How can I determine if windows is even seeing the device when this happens? Is there a way to log this. I am using the iMX6 1.9 image.

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Hi, I’m the Toradex AI Assistant. The Toradex Support team will follow up with you shortly!

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Hello,

If you’re encountering issues with USB touch devices on the iMX6 running Windows CE, here are some troubleshooting steps you can follow:

  1. Enable Debug Messages: First, verify if the driver is loading properly by enabling debug messages. You should see “Loading USB Touch Driver…Done” on the debug console when connecting the USB touch device. For more details, you can refer to the Toradex developer page.

  2. Add Device VID/PID to Registry: If the debug message does not appear, you may need to add the device’s VID/PID to the registry:

    [HKEY_LOCAL_MACHINE\Drivers\HID\LoadClients\<VID>_<PID>\Default\Default\Touch]
"DLL"="USBHidTouch.DLL"

  3. Address Intermittent Detection Issues: For issues with detection at boot, consider adding a delay in the registry:

    [HKEY_LOCAL_MACHINE\Drivers\BuiltIn\HCD_HSH1]
"AttachDelay"=dword:<delay in MS>

    Start with a 1-second (1000ms) delay and adjust to find the minimum stable value.

  4. Further Debugging: To further debug touch issues, enable additional debug messages:

    [HKEY_LOCAL_MACHINE\HARDWARE\DEVICEMAP\TOUCH]
"DebugMsgsOut"=dword:00000001

After making these registry changes, save them and reboot your device to test the results. This should help in diagnosing and resolving the issues with your USB touch device.

Best regards,
Toradex AI Assistant

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