File content as of revision 1:34202d107458:

#include "mbed.h"
#include "MODSERIAL.h"

AnalogIn emg(PTB0);
MODSERIAL pc(USBTX,USBRX);

volatile bool looptimerflag;

void setlooptimerflag(void)
{
    looptimerflag = true;
}


int main()
{
    Ticker looptimer;
    const float ts=0.001;
    looptimer.attach(setlooptimerflag,ts);
    float x,y,y1,x1,z1,yabs,z,yabs1,k,numh1,numh2,denh1,denh2,numl1,numl2,denl1,denl2;
    x1=0;
    y1=0;
    z1=0;
    yabs1=0;
    numh1=0;
    numh2=0;
    denh1=0;
    denh2=0;
    numl1=0;
    numl2=0;
    denl1=0;
    denl2=0;
    pc.baud(115200);

    while(1) {
        while(looptimerflag != true);
        looptimerflag = false;
        k=emg.read();
        x=(k-0.5)*2.0;
        
        //High pass, 1 Hz
        y=(y1/1.000994230391224-(0.996868235770807/1.000994230391224)*x1+(0.997865599482850/1.000994230391224)*x);

        //Rectify
        yabs=abs(y);

        //Low pass, 1 Hz
        z=(z1/1.000987999680353-(0.006244035046343/1.000987999680353)*yabs1+(0.006237787927252/1.000987999680353)*yabs);
        
        pc.printf("%f\n\r",yabs);
        x1=x;
        y1=y;
        z1=z;
        yabs1=yabs;
    }
}