Yoichi Nagashima / Mbed 2 deprecated CQ_nagasm_10_Lissajous

NucleoF401RE EMG seneor with Lissajous Analysis

Dependencies:   mbed

notch.hpp@1:42b57bfcc750, 2014-12-20 (annotated)

Committer:
nagasm
Date:
Sat Dec 20 02:09:52 2014 +0000
Revision:
1:42b57bfcc750
Parent:
0:418c739a67df 
revised

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nagasm 0:418c739a67df 1 /*
nagasm 0:418c739a67df 2 #include <stdio.h>
nagasm 0:418c739a67df 3 #include <stdlib.h>
nagasm 0:418c739a67df 4 #include <math.h>
nagasm 0:418c739a67df 5 int main(){
nagasm 0:418c739a67df 6 int fs = 10000;
nagasm 0:418c739a67df 7 double B0, a1, a2, b1, c0, F0, T;
nagasm 0:418c739a67df 8 F0 = 60; // or 50
nagasm 0:418c739a67df 9 B0 = 100.;
nagasm 0:418c739a67df 10 T = 1./fs;
nagasm 0:418c739a67df 11 a1 = 2. * exp(-M_PI * B0 * T) * cos(2. * M_PI * F0 * T);
nagasm 0:418c739a67df 12 a2 = -exp(-2. * M_PI * B0 * T);
nagasm 0:418c739a67df 13 b1 = -2. * cos(2. * M_PI * F0 * T);
nagasm 0:418c739a67df 14 c0 = (1-a1-a2)/(2+b1);
nagasm 0:418c739a67df 15 printf("a1 = %f\n", a1);
nagasm 0:418c739a67df 16 printf("a2 = %f\n", a2);
nagasm 0:418c739a67df 17 printf("b1 = %f\n", b1);
nagasm 0:418c739a67df 18 printf("c0 = %f\n", c0);
nagasm 0:418c739a67df 19 return 0;
nagasm 0:418c739a67df 20 }
nagasm 0:418c739a67df 21 60Hz
nagasm 0:418c739a67df 22 a1 = 1.936768
nagasm 0:418c739a67df 23 a2 = -0.939101
nagasm 0:418c739a67df 24 b1 = -1.998579
nagasm 0:418c739a67df 25 c0 = 1.642174
nagasm 0:418c739a67df 26 50Hz
nagasm 0:418c739a67df 27 a1 = 1.937188
nagasm 0:418c739a67df 28 a2 = -0.939101
nagasm 0:418c739a67df 29 b1 = -1.999013
nagasm 0:418c739a67df 30 c0 = 1.938304
nagasm 0:418c739a67df 31 */
nagasm 0:418c739a67df 32
nagasm 0:418c739a67df 33 float notch_filter1(float data){
nagasm 0:418c739a67df 34 y1[0] = data + a1*y1[1] + a2*y1[2];
nagasm 0:418c739a67df 35 float reault = y1[0] + b1*y1[1] + y1[2];
nagasm 0:418c739a67df 36 y1[2] = y1[1];
nagasm 0:418c739a67df 37 y1[1] = y1[0];
nagasm 0:418c739a67df 38 return(reault);
nagasm 0:418c739a67df 39 }
nagasm 0:418c739a67df 40
nagasm 0:418c739a67df 41 float notch_filter2(float data){
nagasm 0:418c739a67df 42 y2[0] = data + a1*y2[1] + a2*y2[2];
nagasm 0:418c739a67df 43 float reault = y2[0] + b1*y2[1] + y2[2];
nagasm 0:418c739a67df 44 y2[2] = y2[1];
nagasm 0:418c739a67df 45 y2[1] = y2[0];
nagasm 0:418c739a67df 46 return(reault);
nagasm 0:418c739a67df 47 }