Andrea Corrado / MAX9814_Electret_Microphone_LED_Volume_Indicator

Library to control Electret Microphone Amplifier - MAX9814 from adafruit. Allows: To sample analogue voltage to transform into rough sound level. Transfer sound level to visual indicator, volume bar such as 4 LEDs on LPC11U24.

Dependents:   MAX9814_LED_Sound_Indicator

MAX9814.h

Committer:
andcor02
Date:
2014-11-02
Revision:
3:1a773fb0d7e7
Parent:
2:af2a48ef297c

File content as of revision 3:1a773fb0d7e7:

/*
    MAX9814.h - MAX9814 sensor library
    Developed by Andrea Corrado   
*/

/*
    Example 'main.cpp'

#include "mbed.h"
#include "MAX9814.h"
Serial pc (USBTX, USBRX);


MAX9814 mic(p20);

int main()
{
    while (1) {
        mic.volume_indicator();
        pc.printf("\n\r Level is %f", mic.sound_level());
    }
}

*/

#ifndef MBED_MIC_H
#define MBED_MIC_H

#include "mbed.h"

class MAX9814 {
    
public:

    MAX9814(PinName pin);
    
    void led_array(float x);
    
    void volume_indicator();
    
    float calibration();
    
    float sound_level();

protected:
    AnalogIn _pin;
    BusOut _led1, _led2, _led3, _led4;
    float _value,_sum,_average;
    int _count;
    float _sample;
    Timer _t,_t1;
};

#endif