mod gpio {
    #[derive(Debug)]
    pub enum Port {
        Bcm1,
        Bcm2,
        Bcm3,
        Bcm4
    }

    #[derive(Debug)]
    pub struct Ports {
        pub bcm1: Port,
        pub bcm2: Port,
        pub bcm3: Port,
        pub bcm4: Port,
        _p: ()
    }

    impl Ports {
        pub fn get() -> Ports {
            Ports {bcm1: Port::Bcm1, bcm2: Port::Bcm2, bcm3: Port::Bcm3, bcm4: Port::Bcm4, _p: ()}
        }
    }
}

mod driver {
    use super::gpio::Port;

    #[derive(Debug)]
    pub struct Config<'a> {
        port1: &'a Port,
        port2: Port
    }

    impl<'a> Config<'a> {
        pub fn new(port1: &'a Port, port2: Port) -> Config {
            Config { port1, port2 }
        }
    }
}

fn main() {
    let ports = gpio::Ports::get();
    let motor1 = driver::Config::new(&ports.bcm1, ports.bcm2);
    let motor2 = driver::Config::new(&ports.bcm1, ports.bcm3);
    println!("motor1:{:?}", motor1);
    println!("motor2:{:?}", motor2);
}