On Tue, 10 Jun 2014, Colin O'Flynn wrote:

> Also - did you set the channel? E.g. try:
>
> cable ft2232 interface=1

Thanks for the reminder.  I've now tried both channels, interface=0 and 
interface=1, with no luck. I've also now blacklisted and removed the 
ftdi_sio driver, which previously was grabbing both channels and creating 
/dev/ttyUSB0 and USB1 devices.

I'm not convinced that the MPSEE pins on the FT2232(H) on the Nexys4 board 
is actually wired to the FPGA, even though the manual says one channel is 
wired as a jtag host and the other is a UART/serial port.   Shortly I'll 
be probing the jtag header to see if there's any response to urjtag 
operations.

> The 2232 has two channels you can use! FYI this will probably be very
> slow... you may be better off just using Impact with the Digilent drivers...

Is there a theoretical reason why urjtag should be slower than the xilinx 
tool when both use the same interface?  Or do we just have some work do do
on urjtag's efficiency?


thanks,
Steve

>  -Colin
>
> -----Original Message-----
> From: Ketil Froyn [mailto:ke...@froyn.name]
> Sent: June-10-14 11:09 AM
> To: steve tell
> Cc: Urjtag list
> Subject: Re: [UrJTAG-dev] Digilent Nexys-4 xilinx board FT2232
>
> Are you using a Bus Blaster? Try this instead:
>
> jtag> cable jtagkey vid=0x0403 pid=0x6010
> Connected to libftdi driver.
> jtag> detect
> etc....
>
> Cheers, Ketil
>
> On 9 June 2014 22:53, steve tell <t...@telltronics.org> wrote:
>>
>> Has anyone successfully used urjtag to program the xilinx
>> Artix-7 XC7A100T-1 FPGA on the Nexys-4 board from Digilent, Inc?
>> http://digilentinc.com/Products/Detail.cfm?NavPath=2,400,1184&Prod=NEX
>> YS4
>>
>> The board contains an FTDI FT2232 chip,  which identifies to lsusb as:
>>
>> Bus 001 Device 035: ID 0403:6010 Future Technology Devices
>> International, Ltd FT2232C Dual USB-UART/FIFO IC
>>
>> Using "jtag", I can connect with "cable" as follows, but jtag doesn't
>> detect the FPGA (nor anything else) on the jtag chain:
>>
>> jtag> cable FT2232 vid=0x0403 pid=0x6010
>> Connected to libftdi driver.
>> jtag> detect
>> error: no chain: TDO seems to be stuck at 1
>>
>>
>> I was hoping to use the svf command to play an svf file from the
>> xilinx ISE tools into the fpga.
>> Any hints?
>>
>> thanks,
>> Steve
>>
>>
>>
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>
>
> --
> -Ketil
>
> ----------------------------------------------------------------------------
> --
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http://p.sf.net/sfu/hpccsystems
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