Revision 2:204df97fe23a, committed 2014-11-02

Comitter:

andcor02

Date:

Sun Nov 02 17:32:24 2014 +0000

Parent:

1:380e6ab41172

Child:

3:0e670b36b3d6

Commit message:

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.; ;

Changed in this revision

--- a/Hammer_MicrophoneSensor.cpp	Sun Nov 02 17:12:22 2014 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,104 +0,0 @@
-#include "mbed.h"
-#include "Hammer_MicrophoneSensor.h"
-
-MAX9814::MAX9814(PinName pin): _pin(pin), _led1(LED1), _led2(LED2), _led3(LED3), _led4(LED4) {
-    calibration();
-}
-
-
-void MAX9814::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 MAX9814::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 MAX9814::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 MAX9814::volume_indicator() {
-        led_array(_average);
-        sound_level();
-}

--- a/Hammer_MicrophoneSensor.h	Sun Nov 02 17:12:22 2014 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,29 +0,0 @@
-#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
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MAX9814.lib	Sun Nov 02 17:32:24 2014 +0000
@@ -0,0 +1,1 @@
+MAX9814#49d2ee7cb020

--- a/main.cpp	Sun Nov 02 17:12:22 2014 +0000
+++ b/main.cpp	Sun Nov 02 17:32:24 2014 +0000
@@ -1,5 +1,5 @@
 #include "mbed.h"
-#include "Hammer_MicrophoneSensor.h"
+#include "MAX9814.h"
 Serial pc (USBTX, USBRX);