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David_hale

Xilinx VCU-118 And Digilent USB-2-JTAG IC failure

Question

Hi everyone, 

I've experienced some issues using the Xilinx VCU-118 FPGA, along with Digilent USB-2-JTAG IC . (the USB 2 JTAG is embedded onto the FPGA board.)

Basically, this issue occurs on two of the 5 boards we use, and it seems like the board isn't being recognized by vivado Lab (ver. 2018.1) upon USB connection to my PC.

To be more specific, the problem is that upon connecting my VCU118 FPGA board to my PC (WIN7, using USB cable to the board JTAG port) and launching vivado's hw server, it doesn't recognize the board. I get the following error message:

[Labtoolstcl 44-27] No hardware targets exist on the server [localhost:3121] Check to make sure the cable targets connected to this machine are properly connected and powered up, then use the refresh_hw_server command to re-register the hardware targets.

 

Iv'e opened a thread over at Xilinx support forums at first, https://forums.xilinx.com/t5/Evaluation-Boards/VCU118-FPGA-is-not-recognized-by-vivado-hw-server/m-p/949578#M21119

thinking the board might be acting up,  However, by programming the FPGA board using Xilinx platform cable (Connected directly to JTAG, bypassing the Digilent USB 2 JTAG IC) we were able to show that it's probably a failure of the USB to JTAG IC. 

Upon further investigation, we figured that something might be wrong with the FTDI chip on the USB-2-JTAG IC. So we read the FTDI chip's content using FTprog utility. This is a comparison between the boards that does work, to the faulty one:

[good - show Manufacturer , details, etc. ]

bad_ftdi.png.fd9ba038e9ce07a8858a24dc4f86ce43.png

[ Bad one - seems blank ] 

Bad.png.a4c38bbfda351fa34292d741d47dfe1d.png

 

Is this really whats wrong? Is there a way to "program" the FTDI chip with valid data? 

I tried to install the latest drivers provided with vivado. Perhaps a newer version exists?

Thanks for the help,

David.

Spoiler

 

 

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