We have a Xilinx VC709 FPGA board (Virtex 7), with a JTAG-STM1 interface. The JTAG programmer no longer shows up in either Windows 10 Device Manager, nor does it show up in Vivado (2018.2) Hardware Manager.
A second VC709 works correctly so it doesn't appear to be driver/SW issue.
Probed the TCK, TMS, TDI pins - all are pulled high (3.3V) showing no activity.
We had this VC709 installed in to a PCIe slot on a PC, with the JTAG-USB cable connected between the VC709 and a laptop. Is there a clue in this setup, as to how the STM1 might have failed (e.g., ground loop - what would be most likely failure point on STM1)?
The VC709 otherwise appears to work fine - there is a PCIe design in the BPI Flash that loads on power-up and links to host PCIe, as well as flashing status LED's as expected. We just can no longer reprogram FPGA/FLASH.
Are there any probe points on the STM1 we can check (with DSO) to isolate problem?
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eskull
Hello,
We have a Xilinx VC709 FPGA board (Virtex 7), with a JTAG-STM1 interface. The JTAG programmer no longer shows up in either Windows 10 Device Manager, nor does it show up in Vivado (2018.2) Hardware Manager.
A second VC709 works correctly so it doesn't appear to be driver/SW issue.
Probed the TCK, TMS, TDI pins - all are pulled high (3.3V) showing no activity.
We had this VC709 installed in to a PCIe slot on a PC, with the JTAG-USB cable connected between the VC709 and a laptop. Is there a clue in this setup, as to how the STM1 might have failed (e.g., ground loop - what would be most likely failure point on STM1)?
The VC709 otherwise appears to work fine - there is a PCIe design in the BPI Flash that loads on power-up and links to host PCIe, as well as flashing status LED's as expected. We just can no longer reprogram FPGA/FLASH.
Are there any probe points on the STM1 we can check (with DSO) to isolate problem?
Thank you.
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