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mstock's avatar
mstock
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6 years ago

jtagd JTAG chain broken on Ubuntu 19.04 only on logical cable 1

On Ubuntu releases post-16.04, I've always had a difficult or impossible time getting devices to program (MAX10-lite, DE2i-150, DE10-standard, etc). I've gone through all of the standard things (USB ...
YuanLi_S_Intel's avatar
YuanLi_S_Intel
Icon for Regular Contributor rankRegular Contributor
6 years ago

Hi Matthew,

Just would like to know, how you tried to specifies the port to which you attached new programming by using command below?

jtagconfig --add <type> <port> [<name>]

Also, have you tried to program without checking with "jtagconfig" command? Is it working fine?

Regards,

YL

mstock's avatar
mstock
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6 years ago

YL,

Thanks for the questions. I didn't use jtagconfig --add at all, since these are auto-recognized USB ports. If that is something I should try, let me know what invocation you suggest.

With regards to programming, yes. The only reason I used jtagconfig is to demonstrate the enumeration behaviors. When I try to program, the connection times out with the JTAG chain broken error.

I've been doing additional tests with additional boards, and I *don't* seem to have this issue with the DE10-Standard board from Terasic. I don't have any other boards to test against, but so far DE2i-150 and MAX10-lite have this odd behavior, DE10-Standard does not. I have a standalone Blaster but currently nothing to connect it to for testing. It's possible that it's some subtle interaction between the USB drivers on Linux and the specific way some of the boards are configured/Blaster firmware, but I really don't know.