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
main.cpp
- Committer:
- DominiqueC
- Date:
- 2014-10-20
- Revision:
- 30:2162f7a82fc7
- Parent:
- 29:40a157c53841
File content as of revision 30:2162f7a82fc7:
/***************************************/ /* */ /* BRONCODE GROEP 5, MODULE 9, 2014 */ /* *****-THE SLAP-****** */ /* */ /* -Dominique Clevers */ /* -Rianne van Dommelen */ /* -Daan de Muinck Keizer */ /* -David den Houting */ /* -Marjolein Thijssen */ /***************************************/ #include "mbed.h" #include "HIDScope.h" #include "arm_math.h" //Define objects AnalogIn emg0(PTB0); //Biceps AnalogIn emg1(PTB1); //Triceps HIDScope scope(5); arm_biquad_casd_df1_inst_f32 notch; //constants for 50Hz notch float notch_const[] = {0.9695312529087462, -0.0, 0.9695312529087462, 0.0, -0.9390625058174924}; //state values float notch_states[4]; arm_biquad_casd_df1_inst_f32 highpass; //constants for 20Hz highpass float highpass_const[] = {0.638945525159022, -1.277891050318045, 0.638945525159022, 1.142980502539901, -0.412801598096189}; //state values float highpass_states[4]; //constants for 80Hz lowpass arm_biquad_casd_df1_inst_f32 lowpass; float lowpass_const[] = {0.638945525159022, 1.277891050318045, 0.638945525159022, -1.142980502539901, -0.412801598096189}; //state values float lowpass_states[4]; void looper() { /*variable to store value in*/ uint16_t emg_value; float emg_value_f32; float filtered_emg_notch; float filtered_emg_notch_highpass; float filtered_emg_notch_highpass_lowpass; float filtered_emg_eindsignaal_abs; /*put raw emg value both in red and in emg_value*/ emg_value = emg0.read_u16(); // read direct ADC result, converted to 16 bit integer (0..2^16 = 0..65536 = 0..3.3V) emg_value_f32 = emg0.read(); //process emg arm_biquad_cascade_df1_f32(¬ch, &emg_value_f32, &filtered_emg_notch, 1 ); arm_biquad_cascade_df1_f32(&highpass, &filtered_emg_notch, &filtered_emg_notch_highpass, 1 ); arm_biquad_cascade_df1_f32(&lowpass, &filtered_emg_notch_highpass, &filtered_emg_notch_highpass_lowpass, 1 ); filtered_emg_eindsignaal_abs = 10*fabs(filtered_emg_notch_highpass_lowpass); //gelijkrichter //(Movag) Median berekenen int compare (const void * a, const void * b) { return ( *(int*)a - *(int*)b ); } int main() { float samples[5]={}; float med[5]={}; int count = 0; float sensval; while(1) { count += 1; sensval = input; med[4] = med[3]; med[3] = med[2]; med[2] = med[1]; med[1] = med[0]; med[0] = sensval; samples[4] = med[4]; samples[3] = med[3]; samples[2] = med[2]; samples[1] = med[1]; samples[0] = med[0]; qsort (samples, 5, sizeof(int), compare); // show the averages pc.printf("\n%i %f %f",count,sensval,samples[2]); } } //eind scope.set(0,emg_value_f32); scope.set(1,filtered_emg_notch); scope.set(2,filtered_emg_notch_highpass); scope.set(3,filtered_emg_notch_highpass_lowpass); scope.set(4,filtered_emg_eindsignaal_abs); scope.send(); } int main() { 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(&highpass,1 ,highpass_const,highpass_states); arm_biquad_cascade_df1_init_f32(&lowpass,1 ,lowpass_const,lowpass_states); log_timer.attach(looper, 0.005); while(1) //Loop { /*Empty!*/ /*Everything is handled by the interrupt routine now!*/ } }