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Original question:

Controlling DLP 4500 using python

DLP4500: Unable to read DLP in GUI

Nikhil Shankar65
Intellectual 260 points
Part Number: DLP4500
Other Parts Discussed in Thread: DLPC350

Hello,

In order to control the DLPC350 using a python code, I installed a libusb-win32 driver. But I think because of this, I am unable to control the DLP device using the Lightcrafter GUI. What should I do to revert back to the original settings , so I can access the DLP4500 again.

Regards,
Nikhil Shankar

  • 0
    TI__Mastermind 20045 points
    Hello Nikhil,

    I would recommend uninstalling any drivers that are related to the DLPC350 so they will again be reinstalled by Windows. You can also reinstall the GUI (www.ti.com/.../dlplcr4500evm). Lastly, if you changed the firmware at all please reflash the device (www.ti.com/.../dlpr350).

    Thanks,
    Kyle
  • 0 in reply to Kyle Rakos
    Intellectual 260 points
    Hi Kyle,
    Thanks so much, already tried it, but unfortunately the same driver properties reinstall and the problem persists .

    Regards,
    Nikhil Shankar
  • 0 in reply to Nikhil Shankar65
    TI__Genius 10925 points
    Hi Nikhil,

    Kindly try these steps to uninstall:

    Removing the Filter Driver
    To remove device filter driver, run the GUI filter driver wizard to remove it.
    To remove the class filter driver open the Control Panel, open 'Software', choose the 'LibUsb-Win32-x.x.x.x' entry, and remove it. Take note class filter driver is not recommended to be used.
    A reboot isn't necessary.
    If the above failed, you can manually run "install-filer -u" as admin. After that you can remove the other relevant files. Again, take note class filter driver is not recommended to be used.

    Removing the Device Driver

    The device driver can not be easily removed from the system. You can however try to use usbdeview www.nirsoft.net/.../usb_devices_view.html to remove the entries. Under Vista and Windows 7, you can use pnputil (msdn.microsoft.com/.../ff550419(v=vs.85).aspx) to remove the driver package.


    Let us know if this works.

    Thanks & Regards,
    Hirak.
  • 0 in reply to Hirak Biswas
    Intellectual 260 points
    Hello Mr. Biswas,

    I was able to remove the device driver , but I did not understand the steps to remove the filter driver properly,could you help a bit further with it?

    Also, is there an alternate solution where I can access the Lightcrafter4500 as an external device using Python script, without such issues of the libusb32?

    Regards,
    Nikhil
  • 0 in reply to Nikhil Shankar65
    TI__Genius 10925 points
    Hi Nikhil,

    The LCR4500 uses USB HID drivers to communicate to PC. You need to install a USB HID driver and use that to communicate with LCR4500. An alternative is to use a USB to I2C device (like devasys) which can also be used to communicate to LCR4500. Be advised there is an inherent problem with USBHID drivers running on Windows 10 which potentially can cause problems in communicating. You are also requested to try on a Windows 7 PC.

    Thanks & Regards,
    Hirak.