[BUG] circuitpython 9.0.0 on Raspberry Pi Pico RP2040

[gsteen]

I installed circuitpython 9.0.0 on pi pico. Followed the Getting_Started.md and got a working 'A'. Added Layer module -> Hard crash. I cannot debug it. Installed circuitpython 8.2.10 and it works like expected.

[kolya329]

Wait... So I was having this crash for like 4 days (nuked pi pico W, because I'm stupid) and that's why?! Why haven't I tried it yet?.. But yes, seems like RP2040 is the problem here. Or maybe we will see this problem later.

For debug purposes, that's what Thonny gives me when layers = Layers() is before KC.LT etc.:

PROBLEM IN THONNY'S BACK-END: Exception while handling 'Run' (ConnectionError: EOF). See Thonny's backend.log for more info. You may need to press "Stop/Restart" or hard-reset your CircuitPython device and try again.

Unable to connect to COM5: port not found Process ended with exit code 1.

[xs5871]

I cannot reproduce crashes with CP 9.0.0. Have you tried a more recent build?

[gsteen]

I used this Version: https://adafruit-circuit-python.s3.amazonaws.com/bin/raspberry_pi_pico/de_DE/adafruit-circuitpython-raspberry_pi_pico-de_DE-9.0.0.uf2

Some hours ago CP 9.0.1 was released. I will try it.

edit

Same Problem. Flashed 9.0.1, did storage.erase_filesystem() and copied kmk files. Got Hard fault: memory access or instruction error.

[lukeallister]

Me too on the YD_RP2040

I downgraded to 8.2.10 and it works.

[iovxw]

Adafruit CircuitPython 9.0.3 on 2024-04-04; VCC-GND Studio YD RP2040 with rp2040

kmk version: 46ab5cbc26ee8a63be5217005abc6221d899ad5b

reproduced in REPL:

from kmk.modules.layers import Layers
from kmk.keys import KC
Layers()
KC.TG(0)

>>> from kmk.keys import KC
>>> from kmk.modules.layers import Layers
>>> Layers()
113470 kmk.keys: Invalid key: HT
113474 kmk.keys: NO: Key(code=1000, has_modifiers=None)
<Layers object at 0x2000df60>
>>> KC.TG(0)

[19:52:14.480] Disconnected
[19:52:15.482] Connected
Auto-reload is off.
Running in safe mode! Not running saved code.

You are in safe mode because:
CircuitPython core code crashed hard. Whoops!
Hard fault: memory access or instruction error.
Please file an issue with your program at github.com/adafruit/circuitpython/issues.
Press reset to exit safe mode.

Press any key to enter the REPL. Use CTRL-D to reload.

Looks like a bug in CircuitPython, and I found a fix that works on my board:

diff --git a/kmk/keys.py b/kmk/keys.py
index 364eccf..aed0244 100644
--- a/kmk/keys.py
+++ b/kmk/keys.py
@@ -807,6 +807,8 @@ def make_argumented_key(
         if meta:
             key = Key(
                 NEXT_AVAILABLE_KEY, meta=meta, *constructor_args, **constructor_kwargs
+            ) if constructor_args else Key(
+                NEXT_AVAILABLE_KEY, meta=meta, **constructor_kwargs
             )

             NEXT_AVAILABLE_KEY += 1

[xs5871]

Looks like a bug in CircuitPython, and I found a fix that works on my board:

Not a bug in CP, that syntax is incorrect. Fixed by #958. I already found that in my local (heavily modified) copy of KMK and didn't check if that issue existed upstream. The hard memory faults are not explained by this though.

[gsteen]

With kmk 5525233 and CP to 9.0.4 it is working :-)