File content as of revision 21:4183ea24a735:

#include "mbed.h"
#include "HIDScope.h"
#include <math.h>

//Define objects
AnalogIn    emg0( A0 );
AnalogIn    emg1( A1 );

Ticker      sample_timer;
HIDScope    scope( 2 );
DigitalOut  led(LED1);

/** Sample function
 * this function samples the emg and sends it to HIDScope
 **/
void sample()
{
    static int count=0;
    static float RMS_value=0;
    static float HighPass_value=0;
    count+=1;
    static float RMS[150];
    static float HighPass[30];
    float I1;
    float If;
    I1=emg0.read(); //read signal
    HighPass_value+=(I1-HighPass[count%30])/30.0;
    HighPass[count%30]=I1;
    If=pow(I1-HighPass_value,2.0f); // Highpass-filtered value squared
    RMS_value+=(If-RMS[count%150])/150.0;
    RMS[count%150]=If;
    /* Set the sampled emg values in channel 0 (the first channel) and 1 (the second channel) in the 'HIDScope' instance named 'scope' */
    scope.set(0, sqrt(RMS_value) ); // send root mean squared
    scope.set(1, emg0.read() );
    /* Repeat the step above if required for more channels of required (channel 0 up to 5 = 6 channels) 
    *  Ensure that enough channels are available (HIDScope scope( 2 ))
    *  Finally, send all channels to the PC at once */
    scope.send();
    /* To indicate that the function is working, the LED is toggled */
    led = !led;
}

int main()
{   
    /**Attach the 'sample' function to the timer 'sample_timer'.
    * this ensures that 'sample' is executed every... 0.002 seconds = 500 Hz
    */
    sample_timer.attach(&sample, 0.002);

    /*empty loop, sample() is executed periodically*/
    while(1) {}
}