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Code om 4 EMG te filteren, thresholds te zetten met kalibratie en met putty te kijken of die thresholds overschreden worden
Dependencies: MovingAverage mbed biquadFilter MODSERIAL
Diff: main.cpp
- Revision:
- 1:ecd6dc3c839b
- Parent:
- 0:c9891e1c62f0
- Child:
- 2:f6060b484caf
diff -r c9891e1c62f0 -r ecd6dc3c839b main.cpp --- a/main.cpp Tue Apr 16 11:03:47 2019 +0000 +++ b/main.cpp Tue Apr 16 11:32:24 2019 +0000 @@ -10,54 +10,62 @@ DigitalOut led3(LED_BLUE); MODSERIAL pc(USBTX, USBRX); -//MovingAverage -MovingAverage <float>Movag_1(NSAMPLE,0.0); //Make Moving Average, Define NSAMPLE above -MovingAverage <float>Movag_2(NSAMPLE,0.0); //Make Moving Average, Define NSAMPLE above -MovingAverage <float>Movag_3(NSAMPLE,0.0); //Make Moving Average, Define NSAMPLE above -MovingAverage <float>Movag_4(NSAMPLE,0.0); //Make Moving Average, Define NSAMPLE above - -//EMG tickers, these tickers are called in the mainscript with fsample 500Hz, also sends to HIDscope with same fsample -Ticker sample_ticker; //ticker for filtering pref. with 1000Hz, define in tick.attach -Ticker threshold_check_ticker; -Timer t; //timer try out for Astrid -Timer timer_calibration; //timer for EMG calibration +// Tickers +Ticker sample_ticker; //ticker voor filteren met 1000Hz +Ticker threshold_check_ticker; //ticker voor het checken van de threshold met 1000Hz +Timer timer_calibration; //timer voor EMG Kalibratie +double ts = 0.001; //tijdsstap !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! +double calibration_time = 37; //Kalibratie tijd //Input -AnalogIn emg1( A1 ); -AnalogIn emg2( A2 ); -AnalogIn emg3( A3 ); -AnalogIn emg4( A4 ); +AnalogIn emg1( A1 ); //Duim +AnalogIn emg2( A2 ); //Bicep +AnalogIn emg3( A3 ); //Dorsaal +AnalogIn emg4( A4 ); //Palmair // GLOBALS EMG -//Filtered EMG signals from the end of the chains +//Gefilterde EMG signalen volatile double emg1_filtered, emg2_filtered, emg3_filtered, emg4_filtered; -int i = 0; -//Define doubles for calibration and ticker -double ts = 0.001; //tijdsstap -double calibration_time = 55; //time EMG calibration should take +bool thresholdreach1 = false; +bool thresholdreach2 = false; +bool thresholdreach3 = false; +bool thresholdreach4 = false; -volatile double temp_highest_emg1 = 0; //highest detected value right biceps +volatile double temp_highest_emg1 = 0; //Hoogste waarde gevonden tijdens kalibratie volatile double temp_highest_emg2 = 0; volatile double temp_highest_emg3 = 0; volatile double temp_highest_emg4 = 0; -//Doubles for calculation threshold -double duim_p_t = 0.4; //set threshold at percentage of highest value -double bicep_p_t = 0.4; // -double tricep_p_t = 0.4; //set threshold at percentage of highest value -double onderarm_p_t = 0.4; +//Percentage van de hoogste waarde waar de bovenste treshold gezet moet worden +double Duim_p_t = 0.5; +double Bicep_p_t = 0.4; +double Dorsaal_p_t = 0.6; +double Palmair_p_t = 0.5; +//Percentage van de hoogste waarde waar de onderste treshold gezet moet worden +double Duim_p_tL = 0.5; +double Bicep_p_tL = 0.4; +double Dorsaal_p_tL = 0.5; +double Palmair_p_tL = 0.5; + +// Waarde bovenste treshold waar het signaal overheen moet om de arm te activeren volatile double threshold1; volatile double threshold2; volatile double threshold3; volatile double threshold4; +// Waarde onderste treshold waar het signaal onder moet om de arm te deactiveren +volatile double threshold1L; +volatile double threshold2L; +volatile double threshold3L; +volatile double threshold4L; + // thresholdreads bools int Duim; int Bicep; -int Tricep; -int Onderarm; +int Dorsaal; +int Palmair; // EMG OUTPUT int EMGxplus; @@ -67,137 +75,97 @@ //EMG1!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -//Highpass +//Highpass vierde orde cutoff 20Hz, Band filter om 49, 50, 51Hz eruit te filteren BiQuadChain highp1; -BiQuad highp1_1( 9.21171e-01, -1.84234e+00, 9.21171e-01, -1.88661e+00, 8.90340e-01 ); -BiQuad highp1_2( 1.00000e+00, -2.00000e+00, 1.00000e+00, -1.94922e+00, 9.53070e-01 ); +BiQuad highp1_1( 0.8485, -1.6969, 0.8485, 1.0000, -1.7783, 0.7924 ); +BiQuad highp1_2( 1.0000, -2.0000, 1.0000, 1.0000, -1.8934, 0.9085 ); +BiQuad notch1_1( 0.9907, -1.8843, 0.9907, 1.0000, -1.8843, 0.9813 ); -//Notch -BiQuadChain notch1; -BiQuad notch1_1( 9.56543e-01, -1.82035e+00, 9.56543e-01, -1.84459e+00, 9.53626e-01 ); -BiQuad notch1_2( 1.00000e+00, -1.90305e+00, 1.00000e+00, -1.87702e+00, 9.59471e-01 ); - -//Lowpass 4th order cutoff 3Hz -BiQuadChain lowp1; -BiQuad lowp1_1( 7.69910e-09, 1.53982e-08, 7.69910e-09, -1.96542e+00, 9.65769e-01 ); -BiQuad lowp1_2( 1.00000e+00, 2.00000e+00, 1.00000e+00, -1.98532e+00, 9.85677e-01 ); +//Lowpass first order cutoff 0.4Hz +BiQuad lowp1( 0.0013, 0.0013, 0, 1.0000, -0.9975, 0 ); //EMG2!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -//Highpass +//Highpass vierde orde cutoff 20Hz, Band filter om 49, 50, 51Hz eruit te filteren BiQuadChain highp2; -BiQuad highp2_1( 9.21171e-01, -1.84234e+00, 9.21171e-01, -1.88661e+00, 8.90340e-01 ); -BiQuad highp2_2( 1.00000e+00, -2.00000e+00, 1.00000e+00, -1.94922e+00, 9.53070e-01 ); +BiQuad highp2_1( 0.8485, -1.6969, 0.8485, 1.0000, -1.7783, 0.7924 ); +BiQuad highp2_2( 1.0000, -2.0000, 1.0000, 1.0000, -1.8934, 0.9085 ); +BiQuad notch2_1( 0.9907, -1.8843, 0.9907, 1.0000, -1.8843, 0.9813 ); -//Notch -BiQuadChain notch2; -BiQuad notch2_1( 9.56543e-01, -1.82035e+00, 9.56543e-01, -1.84459e+00, 9.53626e-01 ); -BiQuad notch2_2( 1.00000e+00, -1.90305e+00, 1.00000e+00, -1.87702e+00, 9.59471e-01 ); - -//Lowpass 4th order cutoff 3Hz -BiQuadChain lowp2; -BiQuad lowp2_1( 7.69910e-09, 1.53982e-08, 7.69910e-09, -1.96542e+00, 9.65769e-01 ); -BiQuad lowp2_2( 1.00000e+00, 2.00000e+00, 1.00000e+00, -1.98532e+00, 9.85677e-01 ); +//Lowpass first order cutoff 0.4Hz +BiQuad lowp2( 0.0013, 0.0013, 0, 1.0000, -0.9975, 0 ); //EMG3!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -//Highpass +//Highpass vierde orde cutoff 20Hz, Band filter om 49, 50, 51Hz eruit te filteren BiQuadChain highp3; -BiQuad highp3_1( 9.21171e-01, -1.84234e+00, 9.21171e-01, -1.88661e+00, 8.90340e-01 ); -BiQuad highp3_2( 1.00000e+00, -2.00000e+00, 1.00000e+00, -1.94922e+00, 9.53070e-01 ); +BiQuad highp3_1( 0.8485, -1.6969, 0.8485, 1.0000, -1.7783, 0.7924 ); +BiQuad highp3_2( 1.0000, -2.0000, 1.0000, 1.0000, -1.8934, 0.9085 ); +BiQuad notch3_1( 0.9907, -1.8843, 0.9907, 1.0000, -1.8843, 0.9813 ); -//Notch -BiQuadChain notch3; -BiQuad notch3_1( 9.56543e-01, -1.82035e+00, 9.56543e-01, -1.84459e+00, 9.53626e-01 ); -BiQuad notch3_2( 1.00000e+00, -1.90305e+00, 1.00000e+00, -1.87702e+00, 9.59471e-01 ); - -//Lowpass 4th order cutoff 3Hz -BiQuadChain lowp3; -BiQuad lowp3_1( 7.69910e-09, 1.53982e-08, 7.69910e-09, -1.96542e+00, 9.65769e-01 ); -BiQuad lowp3_2( 1.00000e+00, 2.00000e+00, 1.00000e+00, -1.98532e+00, 9.85677e-01 ); +//Lowpass first order cutoff 0.4Hz +BiQuad lowp3( 0.0013, 0.0013, 0, 1.0000, -0.9975, 0 ); //EMG4!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -//Highpass +//Highpass vierde orde cutoff 20Hz, Band filter om 49, 50, 51Hz eruit te filteren BiQuadChain highp4; -BiQuad highp4_1( 9.21171e-01, -1.84234e+00, 9.21171e-01, -1.88661e+00, 8.90340e-01 ); -BiQuad highp4_2( 1.00000e+00, -2.00000e+00, 1.00000e+00, -1.94922e+00, 9.53070e-01 ); +BiQuad highp4_1( 0.8485, -1.6969, 0.8485, 1.0000, -1.7783, 0.7924 ); +BiQuad highp4_2( 1.0000, -2.0000, 1.0000, 1.0000, -1.8934, 0.9085 ); +BiQuad notch4_1( 0.9907, -1.8843, 0.9907, 1.0000, -1.8843, 0.9813 ); -//Notch -BiQuadChain notch4; -BiQuad notch4_1( 9.56543e-01, -1.82035e+00, 9.56543e-01, -1.84459e+00, 9.53626e-01 ); -BiQuad notch4_2( 1.00000e+00, -1.90305e+00, 1.00000e+00, -1.87702e+00, 9.59471e-01 ); - -//Lowpass 4th order cutoff 3Hz -BiQuadChain lowp4; -BiQuad lowp4_1( 7.69910e-09, 1.53982e-08, 7.69910e-09, -1.96542e+00, 9.65769e-01 ); -BiQuad lowp4_2( 1.00000e+00, 2.00000e+00, 1.00000e+00, -1.98532e+00, 9.85677e-01 ); +//Lowpass first order cutoff 0.4Hz +BiQuad lowp4( 0.0013, 0.0013, 0, 1.0000, -0.9975, 0 ); // ~~~~~~~~~~~~~~~~~~~EMG FUNCTIONS~~~~~~~~~~~~~~~~~~ void emgsample() { - //All EMG signal through Highpass + // EMG signaal lezen double emgread1 = emg1.read(); double emgread2 = emg2.read(); double emgread3 = emg3.read(); double emgread4 = emg4.read(); - + + // Vierde orde highpass filter + notch filter double emg1_highpassed = highp1.step(emgread1); double emg2_highpassed = highp2.step(emgread2); double emg3_highpassed = highp3.step(emgread3); double emg4_highpassed = highp4.step(emgread4); - //All EMG highpassed through Notch - double emg1_notched = notch1.step(emg1_highpassed); - double emg2_notched = notch2.step(emg2_highpassed); - double emg3_notched = notch3.step(emg3_highpassed); - double emg4_notched = notch4.step(emg4_highpassed); - - //All EMG notched rectify - double emg1_abs = abs(emg1_notched); - double emg2_abs = abs(emg2_notched); - double emg3_abs = abs(emg3_notched); - double emg4_abs = abs(emg4_notched); + //Rectificatie + double emg1_abs = abs(emg1_highpassed); + double emg2_abs = abs(emg2_highpassed); + double emg3_abs = abs(emg3_highpassed); + double emg4_abs = abs(emg4_highpassed); //All EMG abs into lowpass - double emg1_lp = lowp1.step(emg1_abs); - double emg2_lp = lowp2.step(emg2_abs); - double emg3_lp = lowp3.step(emg3_abs); - double emg4_lp = lowp4.step(emg4_abs); - - Movag_1.Insert(emg1_lp); - Movag_2.Insert(emg2_lp); - Movag_3.Insert(emg3_lp); - Movag_4.Insert(emg4_lp); - - emg1_filtered = Movag_1.GetAverage(); - emg2_filtered = Movag_2.GetAverage(); - emg3_filtered = Movag_3.GetAverage(); - emg4_filtered = Movag_4.GetAverage(); - - + emg1_filtered = lowp1.step(emg1_abs); + emg2_filtered = lowp2.step(emg2_abs); + emg3_filtered = lowp3.step(emg3_abs); + emg4_filtered = lowp4.step(emg4_abs); } void CalibrationEMG() { - //static float samples = calibration_time/ts; - while(timer_calibration<37) { + + while(timer_calibration<39) { //Duim if(timer_calibration>0 && timer_calibration<7) { led1=!led1; if(emg1_filtered>temp_highest_emg1) { temp_highest_emg1= emg1_filtered; - pc.printf("Temp1 = %f \r\n",temp_highest_emg1); + pc.printf("Highest value Duim= %f \r\n", temp_highest_emg1); + } } - if(timer_calibration>7 && timer_calibration<10) { + if(timer_calibration>7 && timer_calibration<10) { led1=0; led2=0; led3=0; } - if(timer_calibration>10 && timer_calibration<17) { + if(timer_calibration>10 && timer_calibration<17) { //Bicep led2=!led2; if(emg2_filtered>temp_highest_emg2) { temp_highest_emg2= emg2_filtered; - pc.printf("Temp2 = %f \r\n",temp_highest_emg2); + pc.printf("Highest value Bicep= %f \r\n", temp_highest_emg2); } } if(timer_calibration>17 && timer_calibration<20) { @@ -205,11 +173,11 @@ led2=0; led3=0; } - if(timer_calibration>20 && timer_calibration<27) { + if(timer_calibration>20 && timer_calibration<27) { //Dorsaal led3=!led3; if(emg3_filtered>temp_highest_emg3) { temp_highest_emg3= emg3_filtered; - pc.printf("Temp3 = %f \r\n",temp_highest_emg3); + pc.printf("Highest value Dorsaal= %f \r\n", temp_highest_emg3); } } if(timer_calibration>27 && timer_calibration<30) { @@ -217,71 +185,127 @@ led2=0; led3=0; } - if(timer_calibration>30 && timer_calibration<37) { + if(timer_calibration>30 && timer_calibration<37) { //Palmair led2=!led2; led3=!led3; if(emg4_filtered>temp_highest_emg4) { temp_highest_emg4= emg4_filtered; - pc.printf("Temp4 = %f \r\n",temp_highest_emg4); + pc.printf("Highest value Palmair= %f \r\n", temp_highest_emg4); } } led1=1; led2=1; led3=1; - } - - pc.printf("Highest value Duim= %f \r\n", temp_highest_emg1); - pc.printf("Highest value Bicep= %f \r\n", temp_highest_emg2); - pc.printf("Highest value Tricep= %f \r\n", temp_highest_emg3); - pc.printf("Highest value Onderarm= %f \r\n", temp_highest_emg4); - - - threshold1 = temp_highest_emg1*duim_p_t; //Right Biceps - threshold2 = temp_highest_emg2*bicep_p_t; //Right Triceps - threshold3 = temp_highest_emg3*tricep_p_t; //Left Biceps - threshold4 = temp_highest_emg4*onderarm_p_t; //Left Triceps + pc.printf("threshold calculation\r\n"); + threshold1 = temp_highest_emg1*Duim_p_t; + threshold2 = temp_highest_emg2*Bicep_p_t; + threshold3 = temp_highest_emg3*Dorsaal_p_t; + threshold4 = temp_highest_emg4*Palmair_p_t; + + threshold1L = temp_highest_emg1*Duim_p_tL; + threshold2L = temp_highest_emg2*Bicep_p_tL; + threshold3L = temp_highest_emg3*Dorsaal_p_tL; + threshold4L = temp_highest_emg4*Palmair_p_tL; } -//Check if emg_filtered has reached their threshold +//Check of emg_filtered boven de threshold is void threshold_check() { - //EMG1 threshold check +// EMG1 Check +if (thresholdreach1 == false){ //Als emg_filtered nog niet boven de bovenste threshold is geweest + //bovenste threshold check if(emg1_filtered>threshold1) { Duim = 1; - led1 = !led1; + thresholdreach1 = true; + } else { Duim= 0; } - //EMG2 threshold check + } +else{ //Als emg_filtered boven de bovenste threshold is geweest + //onderste threshold check + if(emg1_filtered<threshold1L) { + Duim = 0; + thresholdreach1 = false; + + } else { + Duim= 1; + } + } + +// EMG2 Check +if (thresholdreach2 == false){ //Als emg_filtered nog niet boven de bovenste threshold is geweest + //bovenste threshold check if(emg2_filtered>threshold2) { Bicep = 1; - led2 = !led2; + thresholdreach2 = true; } else { Bicep= 0; } - //EMG3 threshold check - if(emg3_filtered>threshold3) { - Tricep = 1; - led3 = !led3; - } else { - Tricep= 0; } - //EMG4 threshold check - if(emg4_filtered>threshold4) { - Onderarm = 1; - led1 = !led1; - led2 = !led1; - led3 = !led1; +else{ //Als emg_filtered boven de bovenste threshold is geweest + //onderste threshold check + if(emg2_filtered<threshold2L) { + Bicep = 0; + thresholdreach2 = false; + } else { - Onderarm= 0; + Bicep= 1; + } } - +// EMG3 Check +if (thresholdreach3 == false){ //Als emg_filtered nog niet boven de bovenste threshold is geweest + //bovenste threshold check + if(emg3_filtered>threshold3) { + Dorsaal = 1; + thresholdreach3 = true; + } else { + Dorsaal= 0; + } + } +else{ //Als emg_filtered boven de bovenste threshold is geweest + //onderste threshold check + if(emg3_filtered<threshold3L) { + Dorsaal = 0; + thresholdreach3 = false; + + } else { + Dorsaal= 1; + } + } -} +// EMG4 Check +if (thresholdreach4 == false){ //Als emg_filtered nog niet boven de bovenste threshold is geweest + //bovenste threshold check + if(emg4_filtered>threshold4) { + Palmair = 1; + thresholdreach4 = true; + } else { + Palmair= 0; + } + } +else{ //Als emg_filtered boven de bovenste threshold is geweest + //onderste threshold check + if(emg4_filtered<threshold4L) { + Palmair = 0; + thresholdreach4 = false; + + } else { + Palmair= 1; + } + } + + } + + + + + + Ticker sample_timer; @@ -292,52 +316,73 @@ { pc.printf("Duim Right = %i\r\n", Duim); pc.printf("Bicep Right = %i\r\n",Bicep); -pc.printf("tricep Left = %i\r\n", Tricep); -pc.printf("onderarm Left = %i\r\n", Onderarm); -wait(0.01); +pc.printf("Dorsaal Left = %i\r\n", Dorsaal); +pc.printf("Palmair Left = %i\r\n", Palmair); + if (Duim == 1){ //groen + led1 = 0; + } + else { + led1 = 1; + } + if (Bicep == 1){ //rood + led2 = 0; + } + else { + led2 = 1; + } + if (Dorsaal == 1){ //blauw + led3 = 0; + } + else { + led3 = 1; + } + if (Palmair == 1){ + led1 = 0; + led2 = 0; + led3 = 0; + } + else { + led1 = 1; + led1 = 2; + led1 = 3; + } +} - -} int main() { + led1 = 1; + led2 = 1; + led3 = 1; sample_ticker.attach(&emgsample, ts); pc.baud(115200); - //BiQuad Chain add - highp1.add( &highp1_1 ).add( &highp1_2 ); - notch1.add( ¬ch1_1 ).add( ¬ch1_2 ); - lowp1.add( &lowp1_1 ).add(&lowp1_2); - - highp2.add( &highp2_1 ).add( &highp2_2 ); - notch2.add( ¬ch2_1 ).add( ¬ch2_2 ); - lowp2.add( &lowp2_1 ).add(&lowp2_2); - - highp3.add( &highp3_1 ).add( &highp3_2 ); - notch3.add( ¬ch3_1 ).add( ¬ch3_2 ); - lowp3.add( &lowp3_1 ).add(&lowp3_2); - - highp4.add( &highp4_1 ).add( &highp4_2 ); - notch4.add( ¬ch4_1 ).add( ¬ch4_2 ); - lowp4.add( &lowp4_1 ).add(&lowp4_2); - +//BiQuad Chain add + highp1.add( &highp1_1 ).add( &highp1_2 ).add( ¬ch1_1 ); + highp2.add( &highp2_1 ).add( &highp2_2 ).add( ¬ch2_1 ); + highp3.add( &highp3_1 ).add( &highp3_2 ).add( ¬ch3_1 ); + highp4.add( &highp4_1 ).add( &highp4_2 ).add( ¬ch4_1 ); + + // Ticker voor EMG uitlezen - temp_highest_emg1 = 0; //highest detected value right biceps + temp_highest_emg1 = 0; //highest detected value right Biceps temp_highest_emg2 = 0; temp_highest_emg3 = 0; temp_highest_emg4 = 0; timer_calibration.reset(); timer_calibration.start(); - + CalibrationEMG(); + pc.printf("threshold1 = %i, threshold1L = %f\r\n", threshold1, threshold1L); + threshold_check_ticker.attach(&threshold_check, 0.01); + led1 = 1; + led2 = 1; + led3 = 1; + sample_timer.attach(&sample, 0.1); + pc.printf("sample timer attached\r\n"); - CalibrationEMG(); - threshold_check_ticker.attach(threshold_check, 0.1); - sample_timer.attach(&sample, 0.1); - //sample_ticker.detach(); - timer_calibration.stop(); - + timer_calibration.stop();