I trying to use Olimex JATG with VCU118 using pmod but getting following error.
Open On-Chip Debugger 0.10.0+dev (SiFive OpenOCD 0.10.0-2019.05.1)
Licensed under GNU GPL v2
For bug reports:
adapter speed: 1000 kHz
Info : auto-selecting first available session transport “jtag”. To override use 'transport select '.
Error: libusb_open() failed with LIBUSB_ERROR_NOT_SUPPORTED
Info : clock speed 1000 kHz
Error: Timed out handling USB events in mpsse_flush().
Error: ftdi device did not return all data: 0, expected 85
I compare the board schematic of Arty, Zybo and VCU118 and found VCU118 board use voltage translator 3.3v <-> 1.8 between pmod FPGA io. where as Arty and zybo board don’t have voltage translator. does this can cause this failure.