n><span class="macro">!</span>(<span class="ident">serial</span>.<span class="ident">as_mut</span>().<span class="ident">unwrap</span>().<span class="ident">write</span>(<span class="ident">byte</span>));

        <span class="prelude-val">Ok</span>(<span class="ident">Async</span>::<span class="ident">Ready</span>(<span class="ident">serial</span>.<span class="ident">take</span>().<span class="ident">unwrap</span>()))
    })
}

<span class="kw">fn</span> <span class="ident">main</span>() {
    <span class=