[BUG] KC.MO on RP2040-Plus either crashes or doesn't work

[nealie]

Calling KC.MO(1) on an RP2040-Plus (Waveshare Pi Pico clone) crashes if the documented example is used.

When placed before keyboard.modules.append(Layers()) the code does not crash, but also does not perform the layer shift. When placed afterwards, circuitpython enters safe mode.

My code is as follows:

import board
from kmk.kmk_keyboard import KMKKeyboard
from kmk.keys import KC
from kmk.scanners import DiodeOrientation
from kmk.modules.layers import Layers

keyboard = KMKKeyboard()

keyboard.col_pins = (
    board.GP0,  board.GP1,  board.GP2,  board.GP3,  board.GP4,  board.GP5,
    board.GP22, board.GP21, board.GP20, board.GP19, board.GP18, board.GP17
)
keyboard.row_pins = (board.GP6, board.GP7, board.GP8, board.GP9, board.GP10)
keyboard.diode_orientation = DiodeOrientation.COL2ROW

SYMBOL = KC.MO(1)   # <--- Does not crash here, but also doesn't do anything.

keyboard.modules.append(Layers())

#SYMBOL = KC.MO(1)  # <--- Crashes here and enters safe mode.

keyboard.keymap = [
    [ # Layer 0
        KC.ESCAPE, KC.N1,   KC.N2,   KC.N3,   KC.N4,   KC.N5,    KC.N6,    KC.N7,    KC.N8,     KC.N9,   KC.N0,     KC.BSPACE,
        KC.TAB,    KC.Q,    KC.W,    KC.E,    KC.R,    KC.T,     KC.Y,     KC.U,     KC.I,      KC.O,    KC.P,      KC.DELETE,
        KC.LSHIFT, KC.A,    KC.S,    KC.D,    KC.F,    KC.G,     KC.H,     KC.J,     KC.K,      KC.L,    KC.SCOLON, KC.QUOTE,
        SYMBOL,    KC.Z,    KC.X,    KC.C,    KC.V,    KC.B,     KC.N,     KC.M,     KC.COMMA,  KC.DOT,  KC.UP,     KC.ENTER,
        KC.LCTRL,  KC.LGUI, KC.LALT, KC.NO,   KC.NO,   KC.SPACE, KC.SPACE, KC.SLASH, KC.BSLASH, KC.LEFT, KC.DOWN,   KC.RIGHT
    ],
    [ # Layer 1
        KC.TRNS,   KC.EXLM, KC.AT,   KC.HASH, KC.DLR,  KC.PERC,  KC.CIRC,  KC.AMPR,  KC.ASTR,   KC.LPRN, KC.RPRN,   KC.TRNS,
        KC.TRNS,   KC.GRV,  KC.TILD, KC.MINS, KC.UNDS, KC.EQUAL, KC.PLUS,  KC.LCBR,  KC.RCBR,   KC.LBRC, KC.RBRC,   KC.INSERT,
        KC.NO,     KC.F1,   KC.F2,   KC.F3,   KC.F4,   KC.F5,    KC.F6,    KC.NO,    KC.NO,     KC.NO,   KC.COLON,  KC.DQUO,
        KC.NO,     KC.F7,   KC.F8,   KC.F9,   KC.F10,  KC.F11,   KC.F12,   KC.NO,    KC.LABK,   KC.RABK, KC.PGUP,   KC.TRNS,
        KC.RCTRL,  KC.RGUI, KC.RALT, KC.NO,   KC.NO,   KC.TRNS,  KC.TRNS,  KC.QUES,  KC.PIPE,   KC.HOME, KC.PGDOWN, KC.END
    ]
]

if __name__ == '__main__':
    keyboard.go()

This issue seems to be the same as this issue on the zulipchat forum: Crash of rp2040 when I add "FN = KC.MO(1)" line to code.py

[xs5871]

That is most likely a bug in the Circuitpython build you're using. Certainly not KMK.

[claycooper]

Per update in Zulip: Unable to reproduce.

[EduardoOliveira]

I'm having the same behavior... @nealie did you manage to solve this?

[EduardoOliveira]

Just to have it documented somewhere, flashing CircuitPython 8.2.0 solves the issue.