JTAG-SMT2-NC "USB Device not Recognized"

[ub3rmike]

I am attempting to communicate to a JTAG-SMT2-NC, but my PC does not recognize the device. The device manager lists it as "Unknown USB Device (Device Descriptor Request Failed)" Vivado's hardware manager was unable to detect my FPGA via the JTAG-SMT2-NC. Even though Vivado should natively support the JTAG-SMT2-NC, I confirmed that the Digilent drivers are installed. Digilent Adept is unable to detect the JTAG-SMT2-NC as well. I have the latest FTDI drivers installed as well. I've physically probed the pins on the JTAG-SMT2-NC to for the expected voltages, and used different USB cables. 

Is there any guidance for overcoming this issue? Thanks! 

Edit: I've also attempted to manually install the driver in device manager and got "This device cannot start. (Code 10)" error. I've attached a screenshot.

 

[JColvin]

Hi @ub3rmike,

I have reached out to another engineer about your question.

Thanks,
JColvin

[JColvin]

Hi @ub3rmike,

I have sent you a PM about this.

Thanks,
JColvin

[Devendra Pundir]

hi

we are also facing same kind of issue with our custom board . our PC is not recognize the driver . Kindly guide us .

 

thanks & regards

[JColvin]

Hi @Devendra Pundir,

The solution that we have is only compatible with Digilent devices. Does your custom board contain a Digilent chip like one of our JTAG boards? If so, what do you see when you connect to the Digilent Adept software?

Thanks,
JColvin

[Devendra Pundir]

On 10/31/2019 at 10:32 PM, JColvin said:

Hi @Devendra Pundir,

The solution that we have is only compatible with Digilent devices. Does your custom board contain a Digilent chip like one of our JTAG boards? If so, what do you see when you connect to the Digilent Adept software?

Thanks,
JColvin

 

yes , In our custom board we are using Diligent adept "JTAG-SMT2-NC " on board Jtag for debugging and downloading purpose .Instead of that we are able to use external diligent adept jtag  "Digilent 410-249 - JTAG-HS2 Programming Cable ".Our system is able to recognize this programming cable driver but when we are using driver issue is coming .

 

Thanks &regards

Devendra pundir

[JColvin]

Hi @Devendra Pundir,

I apologize for the delay.

I am a little confused about the situation you described. If I understand it correctly, the Vivado Hardware Manager is able to detect the JTAG HS2 and your custom FPGA board downstream from the JTAG HS2, but the Vivado Hardware Manager is not able to recognize the JTAG SMT2 NC and the downstream FPGA?

Thanks,
JColvin

[Devendra Pundir]

On 11/8/2019 at 11:05 PM, JColvin said:

Hi @Devendra Pundir,

I apologize for the delay.

I am a little confused about the situation you described. If I understand it correctly, the Vivado Hardware Manager is able to detect the JTAG HS2 and your custom FPGA board downstream from the JTAG HS2, but the Vivado Hardware Manager is not able to recognize the JTAG SMT2 NC and the downstream FPGA?

Thanks,
JColvin

Hi JColvin,

In our custom board two JTAG connections is there, one is from Jtag hs2 and another one from JTAG SMT2 NC . Check in the picture down below.

I am also attaching schematic of  JTAG connections has be done in our Board .In schematic you will found JP1 which can be connected to JTAG HS2 and another one is USB JTAG  which ON board Jtag connections.

so in this JTAG hs2 is working fine but when with ON board we are facing issue ,the system manager is showing "USB DEVICE is not Recognized "

JTAG connection.xps

[JColvin]

Hi @Devendra Pundir,

Looking at your attached schematic, it looks like the JTAG SMT2 is connected to port J2, whereas your picture shows a cable attached to J1 instead; is this correct?

And as an additional question, when you are testing the JTAG SMT2 connection, I presume the JTAG HS2 is not connected to your computer during that time? It is my understanding that Vivado is only able to make one connection at a time.

[Devendra Pundir]

Hi JColvin,

"And as an additional question, when you are testing the JTAG SMT2 connection, I presume the JTAG HS2 is not connected to your computer during that time? It is my understanding that Vivado is only able to make one connection at a time."

Yes, correct

currently we are working with JTAG hs2 connection only as JTAG SMT 2 is not working.

[malexander]

Hi @Devendra Pundir

Can you try removing U82 from your PCB and see if that solves the problem? 30pF is a lot of added capacitance for the USB data lines and is likely what's causing the issue.

Thanks,
Michael

[Devendra Pundir]

HI @malexander,

Thanks for the reply.

we did the same thing as you told above (remove U82 ) .It started working .

Thanks for the solutions.

Thanks & regards