File content as of revision 1:9913e3886643:

#include "mbed.h"
#include "HIDScope.h"
#include "biquadFilter.h"        // Require the HIDScope library

//Define objects
AnalogIn    emg(A0); //Analog of EMG input
Ticker      sample_timer;
HIDScope    scope(2);        // Instantize a 2-channel HIDScope object
/*The biquad filters required to transform the EMG signal into an usable signal*/
biquadFilter filterhigh1(-1.1430, 0.4128, 0.6389, -1.2779, 0.6389);
biquadFilter filterlow1(1.9556, 0.9565, 0.9780, 1.9561, 0.9780);
biquadFilter notch(-1.1978e-16, 0.9561, 0.9780, -1.1978e-16, 0.9780);
biquadFilter filterlow2(-1.9645, 0.9651, 1.5515e-4, 3.1030e-4, 1.5515e-4);
double emg_value;
double signalpart1;
double signalpart2;
double signalpart3;
double signalpart4;
double signalfinal;
        
/* 
 */
void filter()
{
        emg_value = emg.read();//read the emg value from the elektrodes
        signalpart1 = filterhigh1.step(emg_value);//Highpass filter for removing offset and artifacts
        signalpart2 = abs(signalpart1);//rectify the filtered signal
        signalpart3 = filterlow1.step(signalpart2);//low pass filter to envelope the emg
        signalpart4 = notch.step(signalpart3);//notch filter to remove 50Hz signal
        signalfinal = filterlow2.step(signalpart4);//2nd low pass filter to envelope the emg
        scope.set(0,emg_value);//set emg signal to scope in channel 1
        scope.set(1,signalfinal);//set filtered signal to scope in channel 2
    scope.send();//send the signals to the scope
}

int main()
{
    int caldone=0;
    double maxValue = 0;//define the max value to start with
    while(1){
    while(PTC6){//as long as the button is pressed record the emg signal
        double signalmeasure=emg.read();//read the emg values to check for max
        if(signalmeasure > maxValue){
            maxValue = signalmeasure;
            }
            caldone=1;
        }
    double maxcal=maxValue;
    if(caldone==1){
        sample_timer.attach(&filter, 0.002);//continously execute the EMG reader and filter
        double onoffsignal=signalfinal/maxcal;//divide the emg signal by the max EMG to calibrate the signal per person
}
}
}