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

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=50

--- Comment #63 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to andrey from comment #62)

> Here's the code:
> for gpio_o_val in range(0, num_gpio_o_states):
>     yield top.gpio_o_test.eq(gpio_o_val)
>     yield Settle()
>     yield # Move to the next clk cycle
> 
>     print(type(top.gpio.gpio0.o), type(gpios_pad.gpio0.o))
>     print(top.gpio.gpio0.o, gpios_pad.gpio0.o)

drop this:

>     core_out = yield top.gpio.gpio0.o

keep this:

>     pad_out = yield gpios_pad.gpio0.o

replace this:

>     assert core_out == pad_out

print (gpio_o_val, pad_out)
assert (gpio_o_val & 0b0001) == pad_out

> TypeError: Received unsupported command (rec gpio_0__gpio0__o o) from
> process 'testing_stage1.py:532'

middle of chain. confirm with yosys "show top".
neither possible nor desirable.

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