ABL electronic PIC12 Benutzerhandbuch

mikroC provides a Sound Library which allows you to use sound signalization in
your applications. You need a simple piezo speaker (or other hardware) on desig-
nated port.

Sound_Init

Sound_Play

mikroC - C Compiler for Microchip PIC microcontrollers

mikroC

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Sound_Init(char *port, char pin);

Prepares hardware for output at specified port and pin. Parameter pin needs to be within
range 0–7.

Sound_Init(PORTB, 2);  

// Initialize sound on RB2

Sound_Play(char period_div_10, unsigned num_of_periods);

Plays the sound at the specified port and pin (see Sound_Init). Parameter period_div_10
is a sound period given in MCU cycles divided by ten, and generated sound lasts for a
specified number of periods (num_of_periods).

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.

To play sound of 1KHz: T = 1/f = 1ms = 1000 cycles @ 4MHz. This gives us our first
parameter: 1000/10 = 100. Play 150 periods like this:

Sound_Play(100, 150);