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USB to UART adapter does not show up in the device tree - Zed Board

Anonymous
Not applicable

I am connecting a ZED board to HP laptop , Windows 7 enterprise OS. I installed the CypressDriveInstaller_1. When I connect both the USB ports on the ZED board to the  PC (J17 - PROG & UART) , "USB to UART Adapter" does not show up in the device list. If connect just the UART only (and not the programming cable), I still do not see anything in the device tree. When I connect the programming cable, it shows up as "USB serial Converter" in the device tree and as "COM3" in the COM & LPT ports list. Only COM3 shows up in that list. No other com port. If I open the serial port terminal (Teraterm) , it won't let me program (Vivado cannot open the hardware). After I kill the serial port I can program and when I open the Teraterm and connect to COM3, I get a message "Cannot open COM3". If I right click on COM3 in the device tree and look  at the driver details, it shows the driver as "FTDI driver". This is happening on 2 HP computers ( a desktop  and a  laptop). The board works fine with the serial port on a Dell laptop with windows 7 professional. I would appreciate any help to resolve the problem.

   

Thanks,

   

Mohan 

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3 Replies
Hemanth
Moderator
Moderator
Moderator
First like given First question asked 750 replies posted

Hi,

   

Can you confirm where the cypress USB-Serial chip is present? Is it in a USB-UART cable or on the ZED board? If the Cypress USB-UART chip has our VID and PID then it automatically binds to our driver. Please confirm on the scenario clearly.

   

Regards,

   

Hemanth

Hemanth
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Anonymous
Not applicable

It is on the ZED board. I am using microUSB cables. 

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Anonymous
Not applicable

The problem seems to be with the corporate policies set for the USB devices in the windows 7 OS. After wiping the drive clean and installing the Microsoft supplied Windows 7 Pro (Service Pack 1), the problem disappeared. Zed board is working as expected.

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