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use heapless::{
consts::*,
spsc::{Consumer, Producer},
};
use embedded_hal::timer::CountDown;
use crate::error::Error;
use crate::traits::ATInterface;
type CmdProducer<C> = Producer<'static, C, U10, u8>;
type RespConsumer<R> = Consumer<'static, Result<R, Error>, U10, u8>;
pub struct ATClient<T, C, R> {
cmd_p: CmdProducer<C>,
resp_c: RespConsumer<R>,
default_timeout: u32,
timer: T,
}
impl<T, C, R> ATClient<T, C, R>
where
T: CountDown,
{
pub fn new(queues: (CmdProducer<C>, RespConsumer<R>), default_timeout: u32, timer: T) -> Self {
let (cmd_p, resp_c) = queues;
Self {
cmd_p,
resp_c,
default_timeout,
timer,
}
}
pub fn release(self) -> (CmdProducer<C>, RespConsumer<R>) {
(self.cmd_p, self.resp_c)
}
}
impl<T, C, R> ATInterface<C, R> for ATClient<T, C, R>
where
T: CountDown,
R: core::fmt::Debug,
{
fn send(&mut self, cmd: C) -> Result<R, Error> {
self.send_timeout(cmd, self.default_timeout)
}
fn send_timeout(&mut self, cmd: C, timeout: u32) -> Result<R, Error> {
match self.cmd_p.enqueue(cmd) {
Ok(_) => self.wait_responses(timeout),
Err(_e) => Err(Error::Overflow),
}
}
fn wait_responses(&mut self, timeout: u32) -> Result<R, Error> {
loop {
if let Some(result) = self.resp_c.dequeue() {
return result.map_err(|_e| Error::InvalidResponse);
}
if self.timer.wait().is_ok() {
return Err(Error::Timeout);
}
}
}
}