filtering biceps en triceps
Dependencies: HIDScope mbed-dsp mbed
main.cpp
- Committer:
- DominiqueC
- Date:
- 2014-10-17
- Revision:
- 1:d4f3f7b24852
- Parent:
- 0:055b4123367c
- Child:
- 2:566f1af9d37d
File content as of revision 1:d4f3f7b24852:
/***************************************/ /* */ /* 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 for biceps*/ uint16_t emg0_value; float emg0_value_f32; float filtered_emg0_eindsignaal_abs; /*variable to store value in for triceps*/ uint16_t emg1_value; float emg1_value_f32; float filtered_emg1_eindsignaal_abs; /*put raw emg value both in red and in emg_value*/ emg0_value = emg0.read_u16(); // read direct ADC result, converted to 16 bit integer (0..2^16 = 0..65536 = 0..3.3V) emg0_value_f32 = emg0.read(); //?????moet hiet eindsignaal ook bij staan??????? emg1_value = emg1.read_u16(); // read direct ADC result, converted to 16 bit integer (0..2^16 = 0..65536 = 0..3.3V) emg1_value_f32 = emg1.read(); //process emg biceps arm_biquad_cascade_df1_f32(¬ch, &emg0_value_f32, &filtered_emg0_notch, 1 ); arm_biquad_cascade_df1_f32(&highpass, &filtered_emg0_notch, &filtered_emg0_notch_highpass, 1 ); arm_biquad_cascade_df1_f32(&lowpass, &filtered_emg0_notch_highpass, &filtered_emg0_notch_highpass_lowpass, 1 ); filtered_emg0_eindsignaal_abs = 10*fabs(filtered_emg0_notch_highpass_lowpass); //process emg triceps arm_biquad_cascade_df1_f32(¬ch, &emg1_value_f32, &filtered_emg1_notch, 1 ); arm_biquad_cascade_df1_f32(&highpass, &filtered_emg1_notch, &filtered_emg1_notch_highpass, 1 ); arm_biquad_cascade_df1_f32(&lowpass, &filtered_emg1_notch_highpass, &filtered_emg1_notch_highpass_lowpass, 1 ); filtered_emg1_eindsignaal_abs = 10*fabs(filtered_emg1_notch_highpass_lowpass); //send to PC scope.set(0,emg0_value_f32); scope.set(1,filtered_emg0_eindsignaal_abs); scope.set(3,emg1_value_f32); scope.set(4,filtered_emg1_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!*/ } }