* I need to assign a delay data to each mode, so Mode should have a value + delay

```rust
#[repr(u16)]
#[derive(Clone, Copy)]
pub enum Mode {
    PowerDown = 0x00,
    Single = 0x01,
    Cont10Hz = 0x02,
    Cont20Hz = 0x04,
    Cont50Hz = 0x06,
    Cont100Hz = 0x08,
    Cont200Hz = 0x0A,
    Cont1Hz = 0x0C,
    SelfTest = 0x10,
}

pub struct mode_values  {
    value:u8,
    ready_check:std::time::Duration
}

//actually I'm doing something like:

impl From<Mode> for std::time::Duration {
    fn from(mode: Mode) -> Self {
        match mode {
            Mode::Cont10Hz => std::time::Duration::from_millis(50),
            Mode::Cont20Hz => std::time::Duration::from_millis(25),
            Mode::Cont50Hz => std::time::Duration::from_millis(10),
            Mode::Cont100Hz => std::time::Duration::from_millis(5),
            Mode::Cont200Hz => std::time::Duration::from_micros(2500),
            Mode::Cont1Hz => std::time::Duration::from_millis(500),
            _ => std::time::Duration::from_micros(0),
        }
    }
}
```