Diff: EMG.cpp

Revision:

11:dd1976534a03

Parent:

7:c17f5473f4e1

Child:

15:a24b30061c5f

--- a/EMG.cpp	Fri Oct 27 11:55:22 2017 +0000
+++ b/EMG.cpp	Mon Oct 30 15:32:27 2017 +0000
@@ -1,9 +1,9 @@
 #include "EMG.h"
-
+// This is a class to set different emg sensors it gets the raw emg as input and returns the filterd envelope of the signal
 
-EMG::EMG(PinName data) : _data(data) , MainsReject(0.940809296, -1.525271192, 0.940809296, 1.000000000, -1.525271192, 0.881618592) , 
-                                        Low_pass( 0.145323884, 0.290647768, 0.145323884, 1.000000000, -0.671029091, 0.252324626)  ,
-                                        HiPass(0.914969144, -1.829938288, 0.914969144, 1.000000000, -1.822694925, 0.837181651) , 
+EMG::EMG(PinName data) : _data(data) , MainsReject(0.940809296, -1.525271192, 0.940809296, 1.000000000, -1.525271192, 0.881618592) ,  // set the coeficients of all filters used in the code 
+                                        Low_pass( 0.145323884, 0.290647768, 0.145323884, 1.000000000, -0.671029091, 0.252324626)  ,   // all of the filters are objects of the class BiQuad.h 
+                                        HiPass(0.914969144, -1.829938288, 0.914969144, 1.000000000, -1.822694925, 0.837181651) ,      
                                         LoPass( 0.003621682, 0.007243363, 0.003621682, 1.000000000, -1.822694925, 0.837181651)
 {
     cntr = 0;
@@ -11,7 +11,7 @@
 
 
 }
-double EMG::get_notch(double data){
+double EMG::get_notch(double data){ // remove 50Hz peak dew to all electrical network apliances
     
     
     
@@ -20,7 +20,7 @@
 }
     
     
-double EMG::get_noise(){
+double EMG::get_noise(){            // remove noise from the system (noise is conciderd 80Hz+)
    
    
     
@@ -28,7 +28,7 @@
 }
     
     
-double EMG::get_DC(double data){
+double EMG::get_DC(double data){   // remove DC offset from the signal (High pass filter above 10Hz)
     
     
     
@@ -37,7 +37,7 @@
 }
     
     
-double EMG::get_absolute(double data){
+double EMG::get_absolute(double data){  //get the absolute value of the signal
     
     return abs(data);
     
@@ -45,14 +45,14 @@
 }
     
     
-double EMG::get_envelope(double data){
+double EMG::get_envelope(double data){  // return the envelope of the signal (low pass filter at 5Hz)
     
    
     
     return LoPass.step(data);
 }
     
-double EMG::filter(){
+double EMG::filter(){                   // Aply all filters and absolute in series in order to get envelope of the EMG signal
     
     if(cntr<=500)
     {