Mikroelektronika MIKROE-724 データシート

464

mikoBasic PRO for dsPIC30/33 and PIC24

MikroElektronika

mikroBasic PRO for dsPIC30/33 and PIC24 provides a Sound Library to supply users with routines necessary for sound 

signalization in their applications. Sound generation needs additional hardware, such as piezo-speaker (example of 

piezo-speaker interface is given on the schematic at the bottom of this page).

Library Routines

 

- Sound_Init 

 

- Sound_Play 

Sound_Init

Sound_Play

sub procedure Sound_Init(dim byref snd_port, snd_pin as word)

Description Configures the appropriate MCU pin for sound generation.
Parameters - 

snd_port

: sound output port address 

- 

snd_pin

: sound output pin 

Nothing.

Nothing. 

Sound_Init(PORTD, 3)

None.

sub procedure Sound_Play(dim freq_in_hz, duration_ms as word)

Description Generates the square wave signal on the appropriate pin.
Parameters - 

freq_in_hz

: signal frequency in Hertz (Hz) 

- 

duration_ms

: signal duration in miliseconds (ms) 

Nothing.

In order to hear the sound, you need a piezo speaker (or other hardware) on designated port. Also, you 

must call Sound_Init to prepare hardware for output before using this function.

Sound_Play(1000, 100)

None.