Program 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.

Dependencies:   MAX9814_Electret_Microphone_LED_Volume_Indicator mbed

Revision:
1:380e6ab41172
Parent:
0:d096ca2ffef0
Child:
2:204df97fe23a
--- a/main.cpp	Sun Nov 02 17:00:16 2014 +0000
+++ b/main.cpp	Sun Nov 02 17:12:22 2014 +0000
@@ -1,136 +1,14 @@
 #include "mbed.h"
-//#include "Hammer_MicrophoneSensor.h"
+#include "Hammer_MicrophoneSensor.h"
 Serial pc (USBTX, USBRX);
 
 
-
-
-class MAX9814 {
-    
-public:
-
-    MAX9814(PinName pin): _pin(pin), _led1(LED1), _led2(LED2), _led3(LED3), _led4(LED4) {
-    }
-
-
-void led_array(float x ) {
-
-    if (_value<x+0.05) {
-            _led1=0;
-            _led2=0;
-            _led3=0;
-            _led4=0;
-    }
-    if (_value>x+0.05&&_value<0.5+x) {
-            _led1=1;
-            _led2=0;
-            _led3=0;
-            _led4=0;
-    }
-    if (_value>0.5+x&&_value<1+x) {
-            _led1=1;
-            _led2=1;
-            _led3=0;
-            _led4=0;
-    }
-    if (_value>1+x&&_value<1.2+x) {
-            _led1=1;
-            _led2=1;
-            _led3=1;
-            _led4=0;
-    }
-    if (_value>1.2+x&&_value<2.8+x) {
-            _led1=1;
-            _led2=1;
-            _led3=1;
-            _led4=1;
-    }
-}
-
-float calibration() {
-    
-    _t.start();
-    _t1.start();
-    float peakToPeak=0, signalMax=0, signalMin=1024;
-
-    while (_t1.read()<1) {
-        while (_t.read_ms()<50) {
-            _sample=_pin.read();
-
-            if (_sample<1024) {
-                if (_sample>signalMax)
-                    signalMax=_sample;
-
-                else if (_sample<signalMin)
-                    signalMin=_sample;
-            }
-        }
-     _t.reset();
-     peakToPeak=signalMax-signalMin;
-     _value= (peakToPeak*3.3);
-     _value = floor(_value * 100) / 100;
-     _sum+=_value;
-     _count++;
-    }
-    _average=_sum/_count;
-    _t1.reset();
-
-    return _average;
-}
-
-float sound_level() {
-
-    _t.start();
-    float peakToPeak=0, signalMax=0, signalMin=1024;
-
-    while (_t.read_ms()<50) {
-        _sample=_pin.read();
-
-        if (_sample<1024) {
-            if (_sample>signalMax)
-                signalMax=_sample;
-
-            else if (_sample<signalMin)
-                signalMin=_sample;
-        }
-    }
-    _t.reset();
-    peakToPeak=signalMax-signalMin;
-    _value= (peakToPeak*3.3);
-    _value = floor(_value * 100) / 100;
-    _sum+=_value;
-    _count++;
-
-    return _value;
-}
-
-
-void volume_indicator() {
-        led_array(_average);
-        sound_level();
-}
-
-protected:
-    AnalogIn _pin;
-    BusOut _led1, _led2, _led3, _led4;
-    float _value,_sum,_average;
-    int _count;
-    float _sample;
-    Timer _t,_t1;
-
-};
-
-
-
-
 MAX9814 mic(p20);
 
 int main()
 {
-    mic.calibration();
     while (1) {
         mic.volume_indicator();
-        mic.sound_level();
         pc.printf("\n\r Level is %f", mic.sound_level());
     }
 }
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