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Programming PIC Microcontrollers in BASIC - mikroElektronika

7.5 Sound Signalization

Some applications require sound signalization in addition to visual or instead of it. It is commonly used to alert or

announce the termination of some long, time-consuming process. The information presented by such means is fairly

simple, but relieves the user from having to constantly look into displays and dials.

BASIC’s Sound library facilitates generating sound signals and output on specified port. We will present a simple

demonstration using piezzo speaker connected to microcontroller’s port.

program Sound

' The following three tones are calculated for 4MHz crystal

sub procedure Tone1

Sound_Play(200, 200) ' Period = 2ms <=> 500Hz, Duration = 200 periods

end sub

sub procedure Tone2

Sound_Play(180, 200) ' Period = 1.8ms <=> 555Hz

end sub

sub procedure Tone3

Sound_Play(160, 200) ' Period = 1.6ms <=> 625Hz

end sub

sub procedure Melody ' Plays the melody "Yellow house"

Tone1

Tone2

Tone3

Tone1

Tone2

Tone3

Tone1

Tone2

Tone3

Tone1

Tone2

Tone3

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