Tbh, do we need more than something like this?

```rust
trait Timer {
    /// Starts or restarts the timer at 0
    fn start(&mut self);
    
    fn micros(&mut self) -> Result<u32, Error>; // Or u64?
    fn millis(&mut self) -> Result<u32, Error>; 
    fn secs(&mut self) -> Result<u32, Error>;
}

enum Error {
    TimerOverflowed,
    // ???
}
```

(Probably better generic error, but you get the point)