brain#

Initializing the brain Class#

The Brain is created by using the following constructor:

The brain constructor creates a brain object.

// Create a new object "Brain" with the brain class.
brain Brain;

This Brain object will be used in all subsequent examples throughout this API documentation when referring to brain class methods and attributes.

The brain class comes with six pre-defined attributes:

Battery - Provides information about the EXP Brain’s battery, including capacity, voltage, and current.
Button - Allows you to detect button presses and assign functions to button events on the EXP Brain.
Timer - Provides functionality to measure elapsed time and assign functions to time-based events on the EXP Brain.
Screen - Enables you to display text and draw images on the EXP Brain’s screen.
SDcard - Provides access to files stored on the EXP Brain’s SD card.
ThreeWirePort - Provides access to 3-Wire Sensors connected to the EXP Brain’s 3-Wire Ports. Each port is identified by a letter (A through H) and can be accessed using the format Brian.ThreeWirePort.X, where X is the port letter. For example, Brian.ThreeWirePort.A refers to the Sensor connected to port A.

Attributes

In addition to its attributes, the Brain class provides several methods that can be used directly.

The playSound(sound) method plays a sound on the Brain.

Parameters	Description
sound	A valid SoundType.

Returns: None.

// Play a sound of type tada.
Brain.playSound(tada);

The playTone(tone, volume, duration) method plays a sound on the Brain.

Parameters	Description
tone	The tone to play.
volume	The volume to play the tone at in the range 0 - 100.
duration	The time to play the tone for in milliseconds.

Returns: None.

// Play a tone on the Brain.
Brain.playTone(2, 50, 1000);

This method can be called in the following ways:

The playNote(octave, note) method plays a note in the given octave on the Brain.

Parameters	Description
octave	The octave to use.
note	The note to play.

// Play a note on the Brain.
Brain.playNote(1, 4);

The playNote(octave, note, duration) method plays a note in the given octave on the Brain and waits for the given time before returning.

Parameters	Description
octave	The octave to use.
note	The note to play.
duration	The duration in milliseconds to play the note for.

// Play a note on the Brain.
Brain.playNote(1, 4, 200);

The playFile(filename, volume) method plays a sound file in .wav format on the Brain.

Parameters	Description
filename	The sound file to play.
volume	The sound volume in the range 0 - 100.

Returns: None.

// Play the sound file titled "myfile.wav" on the Brain.
Brain.playFile('myfile.wav', 50);

The soundOff() method stops any sound that is playing.

Returns: None.