werkend filter: 50 hz notch 20 hz hoogdoorlaat 80 hz laagdoorlaat geabsoluteerd vermenigvuldigd met 10
Dependencies: HIDScope mbed-dsp mbed
Fork of Project5-filtering2 by
Diff: main.cpp
- Revision:
- 20:3ae43944846a
- Parent:
- 19:0443e0654e8f
- Child:
- 21:c9da9adc6706
--- a/main.cpp Thu Oct 16 14:15:16 2014 +0000 +++ b/main.cpp Thu Oct 16 14:22:56 2014 +0000 @@ -18,21 +18,21 @@ AnalogIn emg1(PTB1); //Triceps HIDScope scope(5); -//arm_biquad_casd_df1_inst_f32 notch; +arm_biquad_casd_df1_inst_f32 notch; //constants for 50Hz notch -//float notch_const[] = {0.9695312529087462, -0.0, 0.9695312529087462, 0.0, -0.9390625058174924}; +float notch_const[] = {0.9695312529087462, -0.0, 0.9695312529087462, 0.0, -0.9390625058174924}; //state values -//float notch_states[4]; +float notch_states[4]; arm_biquad_casd_df1_inst_f32 highpass; //constants for 5Hz highpass float highpass_const[] = {0.8948577513857248, -1.7897155027714495, 0.8948577513857248, 1.7786300789392977, -0.8008009266036016}; //state values float highpass_states[4]; //constants for 80Hz lowpass -//arm_biquad_casd_df1_inst_f32 lowpass; -//float lowpass_const[] = {0.6389437261127493, 1.2778874522254986, 0.6389437261127493, 1.1429772843080919, 0.41279762014290533}; +arm_biquad_casd_df1_inst_f32 lowpass; +float lowpass_const[] = {0.6389437261127493, 1.2778874522254986, 0.6389437261127493, 1.1429772843080919, 0.41279762014290533}; //state values -//float lowpass_states[4]; +float lowpass_states[4]; void looper() @@ -50,10 +50,9 @@ //process emg arm_biquad_cascade_df1_f32(&highpass, &emg_value_f32, &filtered_emg, 1 ); - //arm_biquad_cascade_df1_f32(¬ch, &filtered_emg, &filtered_emg_notch, 1 ); - //arm_biquad_cascade_df1_f32(¬ch, &filtered_emg_notch, &filtered_emg_lowpass, 1 ); - //filtered_emg_abs = fabs(filtered_emg_lowpass); - + filtered_emg_abs = fabs(filtered_emg); + arm_biquad_cascade_df1_f32(¬ch, &filtered_emg, &filtered_emg_notch, 1 ); + arm_biquad_cascade_df1_f32(¬ch, &filtered_emg_notch, &filtered_emg_lowpass, 1 ); scope.set(0,emg_value); //uint value scope.set(1,filtered_emg); //processed float @@ -67,9 +66,9 @@ { Ticker log_timer; //set up filters. Use external array for constants - //arm_biquad_cascade_df1_init_f32(¬ch,1 , notch_const, notch_states); + arm_biquad_cascade_df1_init_f32(¬ch,1 , notch_const, notch_states); arm_biquad_cascade_df1_init_f32(&highpass,1 ,highpass_const,highpass_states); - //arm_biquad_cascade_df1_init_f32(&lowpass,1 ,lowpass_const,lowpass_states); + arm_biquad_cascade_df1_init_f32(&lowpass,1 ,lowpass_const,lowpass_states); log_timer.attach(looper, 0.005); while(1) //Loop