Sound Library

The mikroC PRO for FT90x 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).

Sound_Init

Prototype	void Sound_Init(unsigned char snd_port, unsigned char* snd_pin);
Description	Configures the appropriate MCU pin for sound generation.
Parameters	`snd_port:` sound output port address `snd_pin:` sound output pin
Returns	Nothing.
Requires	Nothing.
Example	Sound_Init(GPIO_PORT_08_15, 0);
Notes	None.

Sound_Play

Prototype	void Sound_Play(unsigned int freq_in_hz, unsigned< int/b> duration_ms);
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)
Returns	Nothing.
Requires	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.
Example	// Play sound of 1KHz in duration of 100ms Sound_Play(1000, 100);
Notes	None.

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