Alternative firmware for the minipad

This firmware unlike the official doesn't bind keys 1 to 1, it uses key sequences for typing.

• unlimited keys via sequences,
• rapid trigger,
• configuration via serial.

Download a release or build:

cargo build --release
cd target/thumbv6m-none-eabi/release
elf2uf2-rs owopad

And flash:

picotool load owopad.uf2
picotool reboot

By default there are no defined keybinds

There is a utility for configuration: OwOtility

All returned numbers are in little endian

Save current binds and key configuration to flash

Puts the keypad into BOOTSEL mode

Sends back whatever you tell it to

Sends last adc readings as [u16; 3]

Sends last calculated key depth as [u16; 3]

Sends firmware constants [NODE_COUNT, SWITCH_TRAVEL, AUTOCALIBRATION_DEADZONE] as [u16; 3]

Sends last main loop time as u64

Clears all keybinds

Resets key configuration

Sends key configuration as [KeyConfig; 3] where KeyConfig:

struct KeyConfig {
    rt_up: u16,
    rt_down: u16,
    min: u16,
    max: u16,
}

Sends the table of nodes which is the tree representing keybinds as [Node; 1024] where Node:

struct Node {
    children: [u16; 3],
    key: Option<Keyboard>, // usb hid scancode
}

Sets config property k of key of id i (zero-indexed) to v

Sets sequence seq (keys, e.g. LRM for a seqence of: left key, right key, middle key) to correspond to key k. Besides the obvious characters k can be:

• F<1..=12> for function keys,
• _RIGHT, _LEFT, _UP, _DOWN for arrows,
• self explanatory: _ENTER, _ESC, _TAB, _BACKSP, _CAPS, _PS, _INS, _HOME, _PGUP, _DEL, _END, _PGDOWN, _LCTRL, _LSHIFT, _LALT, _RCTRL, _RSHIFT, _RALT.