File content as of revision 0:6c6907217e7a:

#include "mbed.h"
#include "BiQuad.h"
#include "HIDScope.h"

Ticker      sample_timer;
HIDScope    scope(2);

BiQuadChain bqc;
BiQuad BqNotch1( 9.98224e-01, -1.61516e+00, 9.98224e-01, -1.61555e+00, 9.98222e-01 );
BiQuad BqNotch2( 1.00000e+00, -1.61804e+00, 1.00000e+00, -1.61764e+00, 9.98227e-01 );

BiQuad BqHP( 9.86760e-01, -1.97352e+00, 9.86760e-01, -1.97334e+00, 9.73695e-01 );
//BiQuad BqLP( 3.46041e-04, 6.92083e-04, 3.46041e-04, -1.94670e+00, 9.48082e-01 );

Ticker emgSampleTicker;
AnalogIn emg0( A0 );
AnalogIn emg1 (A1) ;
//volatile double emgFiltered;
//volatile double emgSampleabs;

void emgSample() 
{
double emgFiltered = bqc.step( emg0.read() );
bqc.add( &BqNotch1 ).add( &BqNotch2 ).add( &BqHP );
//emgSampleabs = fabs(emgFiltered); 
}

void sample()
{
    scope.set(0, emg0.read() );
    scope.set(1, emg1.read() );
    scope.send();
}

int main() 
{
emgSampleTicker.attach( &emgSample, 0.01 );
sample_timer.attach(&sample, 0.002);
while( true ){}
}