User:Goofster1020/Code Tutorials/Tutorial 1 - Basic Wiimote Usage

Introduction

Over the last couple of years, many new programs have been designed for Wii homebrew. But, haven't you ever wondered how these programs were created? The following tutorial shows how the programmers behind the Wii scene develop the simplest and the hardest programs.

Useful Codes

• Wiimote Channels
• Wiimote Buttons
  • Wiimote Codes
  • Nunchuk Codes
  • Classic Controller Codes
  • Guitar Codes
• Wiimote Expansions
• Wiimote Errors

Basic Usage

• Initiallizing the Wiimote
• Disconnecting the Wiimote

Wiimote Features

• Using the Buttons
• Using the Joysticks
• Using the Accelerometer
• Using the IR
• Using Rumble

Expansions

• Nunchuk
• Classic Controller
• Guitar
• Balance Board

Detection

• Wiimote Detection
• Expansion Detection

Other

• Wiimote Settings
• Wiimote Callbacks

Useful Codes

Wiimote Channels

When programming, the Wiimote channels start from 0 and go to 3. So:

• Wiimote 1 = Channel 0
• Wiimote 2 = Channel 1
• Wiimote 3 = Channel 2
• Wiimote 4 = Channel 3

Furthermore, there are preprocessor (macro) codes to make life a little simpler:

WPAD_CHAN_0
// For the first Wiimote. (equals 0)
WPAD_CHAN_1
// For the second Wiimote. (equals 1)
WPAD_CHAN_2
// For the third Wiimote. (equals 2)
WPAD_CHAN_3
// For the fourth Wiimote. (equals 3)

Additionally, there is a code for all Wiimotes that can be used as well:

WPAD_CHAN_ALL
// For every Wiimote. (equals -1)

Wiimote Buttons

In order to detect a button press, you need to define the button. Thankfully, Wiiuse defines these, otherwise you would have to type codes such as:

(0x0001<<16)
// Z button on the Nunchuk. (Defined as WPAD_NUNCHUK_BUTTON_Z)

Instead, you only have to type the name of the button.

Wiimote Codes

The definitions for the buttons on the Wiimote follow:

WPAD_BUTTON_2
// 2 Button.
WPAD_BUTTON_1
// 1 Button.
WPAD_BUTTON_B
// B Button.
WPAD_BUTTON_A
// A Button.
WPAD_BUTTON_MINUS
// Minus Button.
WPAD_BUTTON_HOME
// Home Button.
WPAD_BUTTON_PLUS
// Plus Button.
WPAD_BUTTON_LEFT
// Left Button.
WPAD_BUTTON_RIGHT
// Right Button.
WPAD_BUTTON_DOWN
// Down Button.
WPAD_BUTTON_UP
// Up Button.

Nunchuk Codes

The definitions for the buttons on the Nunchuk follow:

WPAD_NUNCHUK_BUTTON_Z
// Nunchuk Z Button.
WPAD_NUNCHUK_BUTTON_C
// Nunchuk C Button.

Classic Controller Codes

The definitions for the buttons on the Classic Controller follow:

WPAD_CLASSIC_BUTTON_UP
// Classic Controller Up Button.
WPAD_CLASSIC_BUTTON_LEFT
// Classic Controller Left Button.
WPAD_CLASSIC_BUTTON_ZR
// Classic Controller ZR Button.
WPAD_CLASSIC_BUTTON_X
// Classic Controller X Button.
WPAD_CLASSIC_BUTTON_A
// Classic Controller A Button.
WPAD_CLASSIC_BUTTON_Y
// Classic Controller Y Button.
WPAD_CLASSIC_BUTTON_B
// Classic Controller B Button.
WPAD_CLASSIC_BUTTON_ZL
// Classic Controller ZL Button.
WPAD_CLASSIC_BUTTON_FULL_R
// Classic Controller R Button. (when fully pressed)
WPAD_CLASSIC_BUTTON_PLUS
// Classic Controller Plus Button.
WPAD_CLASSIC_BUTTON_HOME
// Classic Controller Home Button.
WPAD_CLASSIC_BUTTON_MINUS
// Classic Controller Minus Button.
WPAD_CLASSIC_BUTTON_FULL_L
// Classic Controller L Button. (when fully pressed)
WPAD_CLASSIC_BUTTON_DOWN
// Classic Controller Down Button.
WPAD_CLASSIC_BUTTON_RIGHT
// Classic Controller Right Button.

Guitar Codes

The definitions for the buttons on the Guitar follow: NOTE: This only works for the Guitar Hero 3 Controller.

WPAD_GUITAR_HERO_3_BUTTON_STRUM_UP
// Guitar Strum Up.
WPAD_GUITAR_HERO_3_BUTTON_YELLOW
// Guitar Fret Yellow.
WPAD_GUITAR_HERO_3_BUTTON_GREEN
// Guitar Fret Green.
WPAD_GUITAR_HERO_3_BUTTON_BLUE
// Guitar Fret Blue.
WPAD_GUITAR_HERO_3_BUTTON_RED
// Guitar Fret Red.
WPAD_GUITAR_HERO_3_BUTTON_ORANGE
// Guitar Fret Orange.
WPAD_GUITAR_HERO_3_BUTTON_PLUS
// Guitar Plus Button.
WPAD_GUITAR_HERO_3_BUTTON_MINUS
// Guitar Minus Button.
WPAD_GUITAR_HERO_3_BUTTON_STRUM_DOWN
// Guitar Strum Up.

Wiimote Expansions

When you use expansions within your code, it is easier just to type out the name of the expansion. The definitions for the expansions available in Wiiuse follow:

WPAD_EXP_NONE
// No expansion is connected. (equals 0)
WPAD_EXP_NUNCHUK
// The Nunchuk is connected. (equals 1)
WPAD_EXP_CLASSIC
// The Classic Controller is connected. (equals 2)
WPAD_EXP_GUITARHERO3
// The Guitar is connected. (equals 3)
WPAD_EXP_WIIBOARD
// The Wii Balance Board is connected on that channel. (equals 4)

If a expansion is unknown, it is defined as:

WPAD_EXP_UNKNOWN
// An unknown expansion is connected. (equals 255)
// This could be because it is a new expansion or
// Wiiuse has no compatibility for it yet.

Wiimote Errors

When using a function, such as the WPAD_Probe(s32,u32) function, it will return a error code. These include:

WPAD_ERR_NONE
// There are no errors with the Wiimote.
WPAD_ERR_NO_CONTROLLER
// There is no Wiimote connected.
WPAD_ERR_NOT_READY
// The Wiimote is not ready.
WPAD_ERR_TRANSFER
// There was a problem with data transfer.
WPAD_ERR_NONEREGISTERED
// The Wiimote is not registered on the Wii. (synchronization)
WPAD_ERR_UNKNOWN
// An unknown error has occurred.
WPAD_ERR_BAD_CHANNEL
// The channel that the Wiimote is connected to is bad. (radio interference?)
WPAD_ERR_QUEUE_EMPTY
// The queue is empty.
WPAD_ERR_BADVALUE
// The Wiimote value is bad.
WPAD_ERR_BADCONF
// The configuration for the Wiimote is bad.

Basic Usage

The following section includes the very basic usage of the Wiimote.

If you are using the Wiimote, no matter what, you always need to have this line in your file:

#include <wiiuse/wpad.h>
//This simple line allows your program access to everything available (in LibWiiuse)  for the Wiimote.

Initializing the Wiimote

In order to turn on and use the Wiimote, you need to add this line (at least once) in your program:

WPAD_Init();
// This will turn on and allow you to use the Wiimote.

Disconnecting the Wiimote

If you want to, you can disconnect the Wiimote when you are done using it. This can be done by:

WPAD_Flush(WPAD_CHAN_ALL);
// This will write all pending data to the wiimote. (not required)
WPAD_Disconnect(WPAD_CHAN_ALL);
// This will turn off all connected Wiimotes.