Diff: EMGmeten.cpp

Revision:

2:5d64e4c95f5c

Parent:

1:b7a9fcf50776

Child:

3:c82170d8b6c8

--- a/EMGmeten.cpp	Tue Oct 28 14:37:59 2014 +0000
+++ b/EMGmeten.cpp	Tue Oct 28 16:37:27 2014 +0000
@@ -1,20 +1,24 @@
 #include "mbed.h"
 #include "HIDScope.h"
+#include "arm_math.h"
+#include "MODSERIAL.h"
 
-#include "arm_math.h"
-
+//MODSERIAL pc(USBTX,USBRX);
 AnalogIn    emg(PTB1); //Analog input
 HIDScope scope(2);
 
 arm_biquad_casd_df1_inst_f32 lowpass_1; //99Hz
 arm_biquad_casd_df1_inst_f32 lowpass_2; //3Hz
 arm_biquad_casd_df1_inst_f32 highpass; //20Hz
+arm_biquad_casd_df1_inst_f32 notch; //50Hz
 float lowpass_1_const[] = {0.978030479206560 , 1.956060958413119 , 0.978030479206560 , -1.955578240315036 , -0.956543676511203};
 float lowpass_1_states[4];
 float lowpass_2_const[] = {0.002080567135492 , 0.004161134270985 , 0.002080567135492 , 1.866892279711715 , 0.875214548253684};
 float lowpass_2_states[4];
 float highpass_const[] = {0.638945525159022 , -1.277891050318045 ,  0.638945525159022 , 1.142980502539901 , -0.412801598096189};
 float highpass_states[4];
+float notch_const[] = {0.978048948305681 , 0.000000000000000 , 0.978048948305681 , 0.000000000000000 , -0.956097896611362};
+float notch_states[4];
 
 void looper()
 {
@@ -26,8 +30,10 @@
     
     arm_biquad_cascade_df1_f32(&highpass, &emg_value_f32, &filtered_emg, 1 );
     arm_biquad_cascade_df1_f32(&lowpass_1, &filtered_emg, &filtered_emg, 1 );
+    arm_biquad_cascade_df1_f32(&notch, &filtered_emg, &filtered_emg, 1);
     filtered_emg = fabs(filtered_emg);
-    //arm_biquad_cascade_df1_f32(&lowpass_2, &filtered_emg, &filtered_emg, 1 );
+    //emg_value_f32 = fabs(emg_value_f32);
+    //arm_biquad_cascade_df1_f32(&lowpass_2, &emg_value_f32, &filtered_emg, 1 );
     
     scope.set(0,emg_value);     //uint value
     scope.set(1,filtered_emg);  //processed float
@@ -40,6 +46,7 @@
     
     arm_biquad_cascade_df1_init_f32(&lowpass_1,1 , lowpass_1_const, lowpass_1_states);
     arm_biquad_cascade_df1_init_f32(&highpass,1 , highpass_const, highpass_states);
+    arm_biquad_cascade_df1_init_f32(&notch,1 , notch_const, notch_states);
     //arm_biquad_cascade_df1_init_f32(&lowpass_2,1 , lowpass_2_const, lowpass_2_states);
     
     log_timer.attach(looper, 0.005);
@@ -48,6 +55,8 @@
     {
       /*Empty!*/
       /*Everything is handled by the interrupt routine now!*/
+      //pc.baud(9600);
+      //pc.printf("filtered_emg=%f\n\r",filtered_emg);
     }
 }
     
\ No newline at end of file