playdate_device/interface/
async.rs1use std::future::Future;
2
3use crate::device::command::Command;
4use crate::error::Error;
5
6
7pub trait Out: In {
8 fn send(&self, data: &[u8]) -> impl Future<Output = Result<usize, Error>>;
9
10 fn send_cmd(&self, cmd: Command) -> impl Future<Output = Result<usize, Error>> {
11 async move {
12 let mut pre = 0;
13 if !matches!(cmd, Command::Echo { .. }) {
14 use crate::device::command::Switch;
15
16 trace!("send cmd: echo off");
17 let echo = Command::Echo { value: Switch::Off };
18 pre = self.send(echo.with_break().as_bytes()).await?;
19 }
20
21 trace!("send cmd: {cmd}");
22 let sent = self.send(cmd.with_break().as_bytes()).await?;
23 Ok(pre + sent)
24 }
25 }
26}
27
28pub trait In {}
29
30pub trait Interface: Out {}
31impl<T: In + Out> Interface for T {}