EMG signals all around zero, not showing differences anymore in hidscope

Dependencies:   HIDScope MODSERIAL biquadFilter mbed

Fork of a_check_emg_filtered_without_cal by Daniqe Kottelenberg

Revision:
12:a76f9b33fbcb
Parent:
10:7255b59224cc
Child:
13:6c2daab3547b
--- a/main.cpp	Mon Oct 24 08:44:48 2016 +0000
+++ b/main.cpp	Mon Oct 24 09:41:19 2016 +0000
@@ -14,20 +14,23 @@
 //define variables
 double emg_0_value;
 double emg_gefilterd;
+double emg_gefilterd_2;
 double emg_abs;
 int    onoffsignal=0;
 double cut_off_value=0.05; //gespecifeerd door floortje
 
 biquadFilter filterhigh1(0.9565, -1.9131, 0.9565, -1.9112, 0.9150);
+biquadFilter filterlow(-1.9645, 0.9651, 1.5515e-4, 3.1030e-4, 1.5515e-4);
 
 
 void filter(){
         emg_0_value=emg0.read();                            //read the emg value from the electrodes
         emg_gefilterd= filterhigh1.step(emg_0_value);
         emg_abs=abs(emg_gefilterd);
+        emg_gefilterd_2=filterlow.step(emg_abs);
         led=!led;
         
-        if (emg_abs>cut_off_value)
+        if (emg_gefilterd_2>cut_off_value)
         {onoffsignal=1;}
           
         else 
@@ -35,7 +38,7 @@
                       
         //send signals  to scope
         scope.set(0, emg_0_value );           //set emg signal to scope in channel 1
-        scope.set(1, emg_gefilterd );    
+        scope.set(1, emg_gefilterd_2 );    
         scope.set(2, onoffsignal);
         scope.send();                       //send all the signals to the scope
                 }