Sound Library
The mikroC PRO for ARM 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
| Prototype |
void Sound_Init(unsigned long *snd_port, unsigned long snd_pin); |
|---|---|
| Description |
Configures the appropriate MCU pin for sound generation. |
| Parameters |
|
| Returns |
Nothing. |
| Requires |
Nothing. |
| Example |
Stellaris// Initialize the pin GPIO_PORTA.6 for playing sound Sound_Init(&GPIO_PORTA_DATA, 6); MSP432// Initialize the pin DIO_P6OUT.6 for playing sound Sound_Init(&DIO_P6OUT, 6); STM32// Initialize the pin GPIOE_ODR.14 for playing sound Sound_Init(&GPIOE_ODR, 14); CEC1x02// Initialize the pin for playing sound Sound_Init(&GPIO_OUTPUT_010_017, 1); |
| Notes |
None. |
Sound_Play
| Prototype |
void Sound_Play(unsigned int freq_in_hz, unsigned int duration_ms); |
|---|---|
| Description |
Generates the square wave signal on the appropriate pin. |
| Parameters |
|
| 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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