[Libre-soc-dev] c4m-JTAG dependency issues

Luke Kenneth Casson Leighton lkcl at lkcl.net
Fri Oct 9 23:08:19 BST 2020

On 10/9/20, Cole Poirier <colepoirier at gmail.com> wrote:

> Sorry, you said above to let you know when I had the c4m-jtag
> libre-soc branch running... I think so. `git branch` produces only
> `*master` because I cloned via ssh from git.libre-soc.org.


> I just ran `python3 debug/test/test_jtag_tap_srv.py`, it prints the
> following and stops, which to me, naively seems to 'work',

this is because i did print statements not asserts on the io pads.

> but noting
> your comment (https://bugs.libre-soc.org/show_bug.cgi?id=511#c6) of
> "still not quite right: ioconn3.core.i is inverted. hm" I'm assuming
> there's some ground truth we can compare against, what would that be?

and thaaat's the cocotb test file that staf did.

so now compare the sets and asserts and you'll see that the
ioconn3.core.i is always inverted.

realistically only looking at the gtkwave will tell what's going on,
but it's a bit of a pig to interpret.


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