File content as of revision 0:e89048c4d596:

#include "mbed.h"
#include "FastPWM.h"
//setting pwm outputs
    FastPWM buck(D11,1);
    FastPWM boost(D10,1);
//seting analog input  
    AnalogIn analog_value(A0);
//setup serial coms
Serial pc(USBTX, USBRX);
//setup ticker 
    Ticker toggle_sample_ticker;
//setup gobal variables
    int count=0;
    int SampleSum=0;
    float sample[8];
//setup interrupt sample function
    void sampling() {
            if(count<8) {
                 count=count+1;
                 sample[count]=(analog_value.read());
                 SampleSum=(sample[0]+sample[1]+sample[2]+sample[3]+sample[4]+sample[5]+sample[6]+sample[7]);
                            }
                else
                    count=0;
                    }
                    
//setup pwm function               
    void buckpwm(int pwm){
             if (pwm <=100) {
                    buck.pulsewidth_ticks( pwm );
                                } 
                            }

int main() {
//setup pwm
    uint32_t period_ticks=720;
    buck.prescaler(1);
    boost.prescaler(1);
// define period of pwm...
    buck.period_ticks (period_ticks);
    boost.period_ticks (period_ticks); 
//define duty cycle
    buckpwm(1);   
    boost.pulsewidth_us(3);
//boostpwm(10);   
    while(1) {
                toggle_sample_ticker.attach(&sampling, 0.0000011); // will cal mycode every 1/8000 second
                pc.printf("\t%i\n",SampleSum);
    }
}