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Author Topic: Windows 10 x64/FT232RL  (Read 3552 times)


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Windows 10 x64/FT232RL
« on: December 10, 2019, 08:42:21 PM »

I bought a CMU USB RS485 TTL CONVERTER FTDI - https://www.communica.co.za/products/cmu-usb-rs485-ttl-converter-ftdi.

My computer is running Windows 10 Pro x64.  I connected the converter using the correct USB cable - https://www.communica.co.za/products/printer-cable-usb-1-8m-tt.  When connected, the device was first shown as ‘Unknown USB Device (Device Descriptor Request Failed)’ so I installed the drivers from here - https://www.ftdichip.com/Drivers/VCP.htm.  The device then showed as a ‘USB Serial Converter’, but the device shows the following error and doesn’t appear to work.

This device cannot start. (Code 10)
A request for the USB device descriptor failed.

The drivers loaded are as follows:

I’m inclined to think that the converter is damaged, unless you have some useful advice?  At this point it’s not connected to anything.  I'm out of ideas at the moment.

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Re: Windows 10 x64/FT232RL
« Reply #1 on: December 11, 2019, 11:38:53 AM »


One thing you could do is to check with USBview as shown below. This allows you to see if a device returns descriptors correctly. If the details such as idVendor and idProduct (VID and PID) are zeros then the device has not been able to communicate properly with the PC.


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