[Libre-soc-bugs] [Bug 50] nmigen pinmux

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Tue Nov 30 20:46:46 GMT 2021


--- Comment #61 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to andrey from comment #60)

> -Another for loop to run through gpio_oe_test. Assert:
> + oe set at core matches oe seen at pad.

looks like a plan.

> As there is no I/O pad logic, the state of the output signal is NOT affected
> by the oe signal. 

err is that true? yes it must be.  if using an actual IOpad it would
not.  interesting.

when it comes to testing boundary scan this will not hold true. not because
of IOpads but because the i o and oe (each) get re-routed.  but, one thing
at a time.

> I've confirmed this by setting gpio3.o and toggling
> gpio3.oe and checking the waveforms.

nicely done.

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