wii controller RVL-003 mapping

[shawn8888]

I am so excited I paired my Wii controller successfully!
Is there a place that I can easily see the key mapping to different controllers? Such as Wii with/without the nunchuck?
Thanks!

[ndeadly]

I haven't officially documented the mappings anywhere. Most controllers are mapped pretty intuitively with regards to the positional layout of the switch pro controller. (+/- take priority over HOME/CAPTURE, and HOME/CAPTURE can be simulated by button combos -+DPAD_UP/-+DPAD_DOWN).

To find the exact mappings, your best bet for now is to take a look at the source code. The wii controller mappings, for example, can be found here

MissionControl/mc_mitm/source/controllers/wii_controller.cpp

Lines 168 to 203 in 2ce5b3a

	void WiiController::MapButtonsHorizontalOrientation(const WiiButtonData *buttons) {
	m_buttons.dpad_down = buttons->dpad_left;
	m_buttons.dpad_up = buttons->dpad_right;
	m_buttons.dpad_right = buttons->dpad_down;
	m_buttons.dpad_left = buttons->dpad_up;
	m_buttons.A = buttons->two;
	m_buttons.B = buttons->one;
	m_buttons.R = buttons->A;
	m_buttons.L = buttons->B;
	m_buttons.minus = buttons->minus;
	m_buttons.plus = buttons->plus;
	m_buttons.home = buttons->home;
	}
	void WiiController::MapButtonsVerticalOrientation(const WiiButtonData *buttons) {
	m_buttons.dpad_down = buttons->dpad_down;
	m_buttons.dpad_up = buttons->dpad_up;
	m_buttons.dpad_right = buttons->dpad_right;
	m_buttons.dpad_left = buttons->dpad_left;
	m_buttons.A = buttons->A;
	m_buttons.B = buttons->B;
	// Not the best mapping but at least most buttons are mapped to something when nunchuck is connected.
	m_buttons.R = buttons->one;
	m_buttons.ZR = buttons->two;
	m_buttons.minus = buttons->minus;
	m_buttons.plus = buttons->plus;
	m_buttons.home = buttons->home;
	}

and here for the nunchuck

MissionControl/mc_mitm/source/controllers/wii_controller.cpp

Lines 225 to 235 in 2ce5b3a

	void WiiController::MapNunchuckExtension(const uint8_t ext[]) {
	auto extension = reinterpret_cast<const WiiNunchuckExtensionData *>(ext);
	m_left_stick.SetData(
	std::clamp<uint16_t>(static_cast<uint16_t>(nunchuck_stick_scale_factor * (extension->stick_x - 0x80) + STICK_ZERO), 0, 0xfff),
	std::clamp<uint16_t>(static_cast<uint16_t>(nunchuck_stick_scale_factor * (extension->stick_y - 0x80) + STICK_ZERO), 0, 0xfff)
	);
	m_buttons.L = !extension->C;
	m_buttons.ZL = !extension->Z;
	}

You can also use the button tester in the settings menu to check them.

I would accept a PR to the readme if someone wanted to take the time to document all the default button mappings though.

[shawn8888]

Thanks! The button tester works!
System Settings -> Controllers and Sensors -> Test Input Devices
I also find that Wii controller doesn't have X and Y button, even with a nunchuck.
However the re-mapping in system menu works.

One more question, for controllers don't have home button, such as XBOX one, I know MINUS + DPAD_UP is Home. But how can I press and hold Home to open the quick menu (sleep and change volume, etc)? Is it possible?

[ndeadly]

Does holding the combo not work? I don't have my switch handy to check, but I don't see why it wouldn't

[shawn8888]

Thank you! Holding combo (MINUS + DPAD_UP) works!