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|
use clap::Parser;
use tokio::{
io::AsyncReadExt,
sync::Mutex,
};
use tokio_serial::SerialPortBuilderExt;
#[derive(Debug, Clone, PartialEq, PartialOrd, serde::Serialize, serde::Deserialize)]
pub enum Uplink {
Ping,
}
#[derive(Debug, Clone, PartialEq, PartialOrd, serde::Serialize, serde::Deserialize)]
pub enum Downlink {
Pong,
PDM(heapless::Vec<u8, 128>),
}
#[derive(clap::Parser, Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
pub struct Args {
#[clap(short, long)]
#[cfg_attr(target_os = "linux", clap(default_value = "/dev/ttyACM0"))]
pub serial_port: String,
}
#[tokio::main]
async fn main() -> eyre::Result<()> {
let args: Args = Args::parse();
let mut port = tokio_serial::new(args.serial_port, 115200).open_native_async()?;
let mut cobs_acc = postcard::accumulator::CobsAccumulator::<256>::new();
let spec = hound::WavSpec {
channels: 1,
sample_rate: 48000 * 8,
bits_per_sample: 16,
sample_format: hound::SampleFormat::Int,
};
let writer =
tokio::task::spawn_blocking(move || hound::WavWriter::create("data.wav", spec)).await??;
let writer = std::sync::Arc::new(Mutex::new(Some(writer)));
tokio::task::spawn({
let writer = writer.clone();
async move {
tokio::signal::ctrl_c().await.unwrap();
let mut writer = writer.lock().await;
let writer = writer.take().unwrap();
writer.finalize().unwrap();
}
});
loop {
let mut bytes = [0u8; 1024];
let n = port.read(&mut bytes).await?;
if n == 0 {
eyre::bail!("serial port closed");
}
for msg in
molybdos_lib::util::cobs::do_deserialize::<Downlink, 256>(&mut cobs_acc, &bytes[..n])
{
match msg {
Downlink::PDM(data) => {
let writer = writer.clone();
tokio::task::spawn_blocking(move || {
let mut writer = writer.try_lock().unwrap();
let writer = writer.as_mut().unwrap();
for b in data {
for bit in 0..8 {
let sample = (b >> bit) & 1;
writer
.write_sample(if sample == 1 {
i16::MAX
} else {
i16::MIN
})
.unwrap();
}
}
})
.await?;
},
_ => {
println!("{msg:?}");
},
}
}
}
}
|
