Andrea Corrado / Mbed 2 deprecated MAX9814_LED_Sound_Indicator

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

Files at this revision

API Documentation at this revision

Revision 0:d096ca2ffef0, committed 2014-11-02

Comitter:
andcor02
Date:
Sun Nov 02 17:00:16 2014 +0000
Child:
1:380e6ab41172
Commit message:
Made into class system, not into seperate h or c though.

Changed in this revision

Hammer_MicrophoneSensor.c Show annotated file Show diff for this revision Revisions of this file
Hammer_MicrophoneSensor.h Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed.bld Show annotated file Show diff for this revision Revisions of this file 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Hammer_MicrophoneSensor.c	Sun Nov 02 17:00:16 2014 +0000
@@ -0,0 +1,103 @@
+//#include "mbed.h"
+//#include "Hammer_MicrophoneSensor.h"
+//
+//MAX9814::MAX9814(PinName pin): _pin(pin), _led1(LED1), _led2(LED2), _led3(LED3), _led4(LED4) {
+//}
+//
+//
+//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();
+//}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Hammer_MicrophoneSensor.h	Sun Nov 02 17:00:16 2014 +0000
@@ -0,0 +1,27 @@
+//#ifndef MBED_MIC_H
+//#define MBED_MIC_H
+//
+//#include "mbed.h"
+//
+//class MAX9814 {
+//    
+//public:
+//
+//    MAX9814(PinName pin);
+//    
+//    void led_array(float x);
+//    
+//    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/main.cpp	Sun Nov 02 17:00:16 2014 +0000
@@ -0,0 +1,136 @@
+#include "mbed.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());
+    }
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Sun Nov 02 17:00:16 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/031413cf7a89
\ No newline at end of file