File content as of revision 2:735ca8577f31:

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

PwmOut pwmpin(D6);
PwmOut led(D10);
AnalogIn potmeter(A5);
DigitalIn button(D2);
DigitalOut directionpin(D5);

HIDScope scope(2);
Ticker ticker;
enum states{forward, stop, backwards};
states CurrentState;

volatile float x;
volatile float y;
volatile float p = potmeter;

void sendData() {
    scope.set(0,potmeter); //set the potmeter data to the first scope
    scope.set(1,x);
    scope.send(); //send the datapoints of the 2 motors
}

int main() {
      
//    float u = -0.3f; //determineusefulvalue, -0.3f is justanexample
//    directionpin = u > 0; //if bigger than 0, gives true, otherwise gives false   
    x = 1; //placeholder value for potmeter of second motor
    
    float scaled_potmeter = (p*2)-1; //scale potmeter from 0-1 to (-1 to 1)
    float c; //value to be used in negative scaled potmeter value
    bool forward = scaled_potmeter > 0;
    bool stop = scaled_potmeter == 0;
    bool backwards = scaled_potmeter < 0;
    
    pwmpin.period_us(60); //60 microseconds PWM period, 16.7 kHz
    led.period_us(60); //60 microseconds
    ticker.attach(&sendData, 0.005f); //send data to hidscope at 200Hz

    while (true) {        
        switch (CurrentState){       
            case forward:
                directionpin = true;
                pwmpin.write(scaled_potmeter); //pwm of motor is potmeter value
                led.write(scaled_potmeter); //led is potmeter value  
                break;
            case stop:
                // do nothing
                break;
            case backwards:
                directionpin = false;
                c = scaled_potmeter*-1;
                pwmpin.write(c); //pwm of motor is potmeter value
                led.write(c); //led is potmeter value 
                break; 
        }            
        wait(1.0f);
    }
}