Emg filter function script for a uni project. Made by Teun van der Molen
Dependencies: HIDScope MODSERIAL mbed
Fork of frdm_EMG by
Diff: main.cpp
- Revision:
- 2:ce5ead27b7cc
- Parent:
- 1:75f61e111ed0
- Child:
- 3:499c71ca30a0
--- a/main.cpp Fri Sep 18 13:31:04 2015 +0000 +++ b/main.cpp Mon Sep 21 08:23:37 2015 +0000 @@ -8,9 +8,9 @@ double v1=0, v2=0, u=0, y=0; const double -b0 = 0.9999999999999999,b1 = 1.9999999999999998,b2 = 0.9999999999999999, a1 = 1.9999999999999998 ,a2 = 0.9999999999999998; -//b0 = 0.02008333102602092 ,b1 = 0.04016666205204184 ,b2 = 0.02008333102602092, a1 = -1.5610153912536877 ,a2 = 0.6413487153577715; - +b0 = 0.9999999999999999,b1 = 1.9999999999999998,b2 = 0.9999999999999999, a1 = 1.9999999999999998 ,a2 = 0.9999999999999998; //low-pass Fc = 50hz +//b0 = 0.02008333102602092 ,b1 = 0.04016666205204184 ,b2 = 0.02008333102602092, a1 = -1.5610153912536877 ,a2 = 0.6413487153577715; //low-pass Fc = 5hz +//b0 = 0.8005910266528649,b1 = -1.6011820533057297,b2 = 0.8005910266528649,a1 = -1.5610153912536877,a2 = 0.6413487153577715; //high-pass Fc = 5hz void computeBiquad(){ double v = u - a1*v1 - a2*v2; @@ -36,7 +36,7 @@ float i = 1; while(1) { // sinewave output - float u = 0.5 + 0.5*sin(i); + float u = (0.25 + 0.1*sin(i) + (0.25 + 0.1*sin(100*i))); double v = u - a1*v1 - a2*v2; y= b0*v + b1*v1 +b2*v2; v2=v1;