Emg filter function script for a uni project. Made by Teun van der Molen
Dependencies: HIDScope MODSERIAL mbed
Fork of frdm_EMG by
main.cpp
- Committer:
- teunman
- Date:
- 2015-09-21
- Revision:
- 5:56725d9362ee
- Parent:
- 4:1baefd1397d6
- Child:
- 6:4cbf5c66e2fb
File content as of revision 5:56725d9362ee:
#include "mbed.h" #include "HIDScope.h" #include "math.h" // Define the HIDScope and Ticker object HIDScope scope(3); Ticker scopeTimer; Ticker biquadTicker; double v1=0, v2=0, u=0, y=0, fy=0, fv1=0, fv2=0, fu=0; //const double b0 = 0.9999999999999999,b1 = 1.9999999999999998,b2 = 0.9999999999999999, a1 = 1.9999999999999998 ,a2 = 0.9999999999999998; //low-pass Fc = 50hz fs = 100hz //const double fb0 = 0.02008333102602092 ,fb1 = 0.04016666205204184 ,fb2 = 0.02008333102602092, fa1 = -1.5610153912536877 ,fa2 = 0.6413487153577715; //low-pass Fc = 5hz fs = 100hz //const double b0 = 0.8005910266528649,b1 = -1.6011820533057297,b2 = 0.8005910266528649,a1 = -1.5610153912536877,a2 = 0.6413487153577715; //high-pass Fc = 5hz fs = 100hz //const double b0 = 0.007820199259120319,b1 = 0.015640398518240638,b2 = 0.007820199259120319,a1 = -1.7347238224240125,a2 = 0.7660046194604936; //low-pass Fc = 3hz fs = 100hz //const double b0 = 0.0009446914586925257,b1 = 0.0018893829173850514,b2 = 0.0009446914586925257,a1 = -1.911196288237583,a2 = 0.914975054072353; //low-pass Fc = 1hz fs = 100hz //const double b0 = 0.956542835577484, b1 = -1.913085671154968, b2 = 0.956542835577484, a1 = -1.911196288237583, a2 = 0.914975054072353; //high-pass Fc = 1hz fs = 100hz //const double b0 = 0.00034604125149151127,b1 = 0.0006920825029830225, b2 = 0.00034604125149151127 ,a1 = -1.9466970561224466 ,a2 = 0.9480812211284125; //low-pass Fc = 6Hz fs = 1000hz //const double fb0 = 0.9149684297741606, fb1 = -1.8299368595483212, fb2 = 0.9149684297741606 ,fa1 = -1.8226935021735358, fa2 = 0.8371802169231065; // High-pass Fc = 20Hz fs = 1000hz //const double fb0 = 0.8948577513857248 ,fb1 = -1.7897155027714495, fb2 = 0.8948577513857248,fa1 = -1.7786300789392977,fa2 = 0.8008009266036016; // High-pass Fc = 25Hz fs = 1000Hz const double b0 = 0.005542711916075981,b1 = 0.011085423832151962,b2 = 0.005542711916075981,a1 = -1.7786300789392977,a2 = 0.8008009266036016; //Low-pass Fc = 25Hz fs=1000Hz const double fb0 = 0.9780302754084559,fb1 = -1.9560605508169118,fb2 = 0.9780302754084559,fa1 = -1.9555778328194147,fa2 = 0.9565432688144089; //high-pass Fc = 6hz fs = 1000hz // Read the analog input AnalogIn an_in(A0); AnalogOut an_out(DAC0_OUT); // The data read and send function void scopeSend() { scope.set(0,y); scope.set(1,fy); scope.set(2,an_in); scope.send(); } void computeBiquad(){ double v = an_in - a1*v1 - a2*v2; y= b0*v + b1*v1 +b2*v2; v2=v1; v1=v; double fv = y - fa1*fv1 - fa2*fv2; fy= fb0*fv + fb1*fv1 + fb2*fv2; fv2=fv1; fv1=fv; } int main() { // Attach the data read and send function at 1000 Hz scopeTimer.attach_us(&scopeSend, 1e5); biquadTicker.attach(&computeBiquad,0.0001f); //float i = 1; while(1) { } }