Buzzer Class Reference

C++ API for Buzzer component. More...

Detailed Description

• ID: buzzer
• Name: Grove Buzzer
• Category: sound
• Manufacturer: seeed
• Connection: pwm
• Kit: gsk

This file defines the Buzzer C++ interface for libbuzzer. This sensor can make different tones when connected to a pin capable of analog pulse-width modulation. It emits sound using a piezoelectric material that vibrates at different frequencies based on the input voltage.

    int chord[] = { DO, RE, MI, FA, SOL, LA, SI, DO, SI };

    // create Buzzer instance
    upm::Buzzer* sound = new upm::Buzzer(5);
    // print sensor name
    std::cout << sound->name() << std::endl;

    // play sound (DO, RE, MI, etc...), pausing for 0.1 seconds between notes
    for (int chord_ind = 0; chord_ind < 7; chord_ind++) {
        // play each note for one second
        std::cout << sound->playSound(chord[chord_ind], 1000000) << std::endl;
        usleep(100000);
    }

Public Member Functions
	Buzzer (int pinNumber)
	~Buzzer ()
int	playSound (int note, int delay)
void	stopSound ()
void	setVolume (float vol)
float	getVolume ()
std::string	name ()

Protected Attributes
std::string	m_name

Constructor & Destructor Documentation

Buzzer

(

int

pinNumber

)

Instantiates a Buzzer object.

Parameters

pinNumber

Buzzer pin number

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~Buzzer

(

)

Buzzer object destructor.

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Member Function Documentation

int playSound	(	int	note,
		int	delay
	)

Play a tone for a certain amount of time or indefinitely. When delay is not used, the sound can be stopped by calling stopSound().

Parameters

note	the note to be played (DO, RE, MI, etc...) or frequency
delay	time in microseconds for playing the sound, a value of 0 plays the sound indefinitely

Returns

the note played

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void stopSound

(

)

Stops the sound currently playing. Has to be called when playSound() does not set a delay value.

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void setVolume

(

float

vol

)

Sets the volume for the buzzer, but may affect the sound timbre. Works best with halved values, e.g. 1.0, 0.5, 0.25, ...

Parameters

vol	the value to set the volume to from 0.0 to 1.0

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float getVolume

(

)

Gets the buzzer volume.

Returns

the value the volume was set to

std::string name ( )

inline

Return name of the component.

Returns

name of the sensor

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The documentation for this class was generated from the following files:

• /var/lib/jenkins/workspace/upm-doc-stable/src/buzzer/buzzer.h
• /var/lib/jenkins/workspace/upm-doc-stable/src/buzzer/buzzer.cxx