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transceiver

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This commit is contained in:
Albin Chaboissier
2025-10-05 19:35:08 +02:00
parent 96689cc3a6
commit 391c5e5c7c
10 changed files with 273 additions and 647 deletions
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12
Cargo.lock generated
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@ -3330,6 +3330,18 @@ dependencies = [
"mio",
"pin-project-lite",
"slab",
"tokio-macros",
]
[[package]]
name = "tokio-macros"
version = "2.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6e06d43f1345a3bcd39f6a56dbb7dcab2ba47e68e8ac134855e7e2bdbaf8cab8"
dependencies = [
"proc-macro2",
"quote",
"syn",
]
[[package]]

2
Cargo.toml
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@ -10,4 +10,4 @@ egui_plot = "0.33.0"
hound = "3.5.1"
plotters = "0.3.7"
rand = "0.9.2"
tokio = "1.47.1"
tokio = { version = "1.47.1", features = ["macros", "sync", "time"] }

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525
main.rs
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@ -1,525 +0,0 @@
#![allow(dead_code)]
use std::{
collections::VecDeque,
f32::consts::PI,
fs::File,
i16,
io::{self, Read, Write, stdout},
ops::{Add, Div, Mul, Sub},
os::unix::thread,
sync::{
Arc,
atomic::{AtomicU32, Ordering},
mpsc::{self, Receiver, Sender, TryRecvError, channel, sync_channel},
},
time::Duration,
};
mod bfsk;
mod complex;
pub mod fft;
mod filtering;
mod iq;
mod nco;
mod units;
mod windows;
mod ted;
use bfsk::BFSKMod;
use complex::Complex;
use complex::Complex32;
use cpal::{
SampleRate,
traits::{DeviceTrait, HostTrait, StreamTrait},
};
use fft::DFTAlgorithm;
use nco::Nco;
use eframe::{
egui::{self, Color32, Context, Vec2b, debug_text::print, decode_animated_image_uri},
glow::TOP_LEVEL_ARRAY_STRIDE,
};
use egui_plot::{
self, AxisHints, Bar, BarChart, HLine, Legend, Line, LineStyle, Plot, PlotPoints, VLine,
};
use plotters::style::Color;
use rand::{Rng, seq::index::sample};
use crate::{
bfsk::BFSKDem, fft::{dft::NaiveDFT, FFT}, filtering::{
dc_block::DCBlocker,
fir::FIRFilter,
impulse_response::design::{self, frequency_response, ir_from_transfer_function},
}, iq::IQSampler, ted::elg::ELGate, units::frequency::{self, hz_to_rad_per_sample}
};
// Utilities
fn map<T>(input: T, in_min: T, in_max: T, out_min: T, out_max: T) -> T
where
T: Clone + Add<Output = T> + Mul<Output = T> + Sub<Output = T> + Div<Output = T>,
{
((input - in_min.clone()) / (in_max - in_min)) * (out_max - out_min.clone()) + out_min
}
const BAUD_RATE: u32 = 1000;
fn main() {
//modulate();
//demodulate();
//return;
// Set up CPAL
let host = cpal::default_host();
let device = host
.default_input_device()
.expect("No input device available");
let mut config = device
.supported_input_configs()
.unwrap()
.next()
.unwrap()
.with_sample_rate(SampleRate(48000));
// Channel to move samples from callback to main thread
let (tx, rx) = sync_channel::<f32>(4096);
// Build input stream
/*
let stream = device
.build_input_stream(
&config.into(),
move |data: &[f32], _| {
for x in data.iter() {
let _ = tx.send(*x * 30.); // non-blocking send
}
},
move |err| eprintln!("Stream error: {}", err),
None,
)
.unwrap();
stream.play().unwrap();
*/
let (eye_tx, eye_rx) = mpsc::channel::<Vec<f32>>();
let (ctx_tx, ctx_rx) = mpsc::channel::<Arc<egui::Context>>();
std::thread::spawn(move || demodulator(rx, eye_tx, ctx_rx));
std::thread::spawn(move || {
let spec = hound::WavSpec {
channels: 1,
sample_rate: 48000,
bits_per_sample: 16,
sample_format: hound::SampleFormat::Int,
};
let mut writer = hound::WavWriter::create("audio/noised.wav", spec).unwrap();
let mut reader = hound::WavReader::open("audio/rec.wav").unwrap();
let mut rand = rand::rng();
let samples = reader.samples::<i16>();
for x in samples {
let noise = rand.random::<f32>() * 2. - 1.;
let sample = x.unwrap() as f32 / i16::MAX as f32 + noise * 0.9;
let _ = tx.send(sample);
writer
.write_sample((sample * i16::MAX as f32) as i16)
.unwrap();
std::thread::sleep(Duration::from_micros(21));
}
writer.finalize().unwrap();
});
let native_options = eframe::NativeOptions::default();
let _ = eframe::run_native(
"Egui",
native_options,
Box::new(|cc| Ok(Box::new(EguiApp::new(cc, eye_rx, ctx_tx)))),
);
}
fn demodulator(
rx: Receiver<f32>,
eye_sender: Sender<Vec<f32>>,
ctx_rx: Receiver<Arc<egui::Context>>,
) {
// Wait for egui context to request redraw
let ctx = ctx_rx.recv().unwrap();
// Modulation parameters
let frequency = 1700.;
let deviation = 500.;
// Data parameters
let sample_rate = 48000;
let baud_rate = BAUD_RATE;
let sample_per_symbol = sample_rate / baud_rate;
let mut iq_sampler = IQSampler::new(hz_to_rad_per_sample(frequency, sample_rate as f32));
// Corellators
let mut nco_pos = Nco::new(hz_to_rad_per_sample(deviation, sample_rate as f32));
let mut nco_neg = Nco::new(hz_to_rad_per_sample(-deviation, sample_rate as f32));
let corellator_length = (sample_per_symbol as f32 * 1.5) as usize;
let corellator_pos = (0..corellator_length)
.map(|i| {
nco_pos.step();
nco_pos.cexp() * windows::blackmann(i as f32 / (corellator_length as f32))
//nco_pos.cexp()
})
.collect::<Vec<_>>();
let corellator_neg = (0..corellator_length)
.map(|i| {
nco_neg.step();
nco_neg.cexp() * windows::blackmann(i as f32 / (corellator_length as f32))
//nco_neg.cexp()
})
.collect::<Vec<_>>();
let mut matched_filter_pos = FIRFilter::new(&corellator_pos);
let mut matched_filter_neg = FIRFilter::new(&corellator_neg);
matched_filter_pos.normalize_freq(hz_to_rad_per_sample(deviation,sample_rate as f32));
matched_filter_neg.normalize_freq(hz_to_rad_per_sample(deviation,sample_rate as f32));
let loop_p = 0.003;
let loop_i = 0.001;
let mut matched_filter = FIRFilter::new(&[Complex32::new(1., 0.); 20]);
matched_filter.normalize_dc();
let mut loop_filter_ir = vec![Complex32::new(loop_i, 0.); 30];
let len = loop_filter_ir.len();
//loop_filter_ir[0] = Complex32::new(loop_p + loop_i, 0.);
loop_filter_ir[len - 1] = Complex32::new(loop_p + loop_i, 0.);
let mut loop_filter = FIRFilter::new(&loop_filter_ir);
//loop_filter.normalize_dc();
//loop_filter.normalize_sum();
let mut elg = ELGate::new(sample_per_symbol as f32, loop_filter);
let mut dc_blocker = DCBlocker::new(0.999);
// Timing recovery
let mut preamble_count = 0;
let mut bit_index = 0;
let mut last = 0u8;
while let Ok(real_sample) = rx.recv() {
let iq = iq_sampler.sample(real_sample);
// Perform corellation
let neg_energy = matched_filter_neg.next(iq);
let pos_energy = matched_filter_pos.next(iq);
let matched =
matched_filter.next_real(dc_blocker.next_real(pos_energy.mag() - neg_energy.mag()));
if let Some((elg_sample, eye)) = elg.next_eye(matched) {
let _ = eye_sender.send(eye);
ctx.request_repaint();
//last >>= 1;
//last |= (!bit as u8) << 7;
let bit = elg_sample > 0.;
if elg_sample * elg_sample > 0.005 {
last >>= 1;
last |= (bit as u8) << 7;
//last <<= 1;
//last |= ((bit) as u8);
if preamble_count >= 2 {
bit_index += 1;
if bit_index >= 8 {
if last == 4 {
print!(" -- EOT");
println!();
preamble_count = 0;
bit_index = 0;
last = 0;
} else {
print!("{}", last as char);
bit_index = 0;
let _ = stdout().flush();
}
}
} else if last == 0xD8 {
preamble_count += 1;
if preamble_count == 2 {
println!("Incoming: ");
}
}
}
}
}
}
//#[derive(Default)]
struct EguiApp {
eye_rx: Receiver<Vec<f32>>,
eyes: VecDeque<Vec<f32>>,
}
impl EguiApp {
fn new(
cc: &eframe::CreationContext<'_>,
eye_rx: Receiver<Vec<f32>>,
ctx_tx: Sender<Arc<egui::Context>>,
) -> Self {
ctx_tx.send(Arc::new(cc.egui_ctx.clone())).unwrap();
Self {
eye_rx,
eyes: VecDeque::new(),
}
}
}
impl eframe::App for EguiApp {
fn update(&mut self, ctx: &egui::Context, frame: &mut eframe::Frame) {
egui::CentralPanel::default().show(ctx, |ui| {
let max_eyes = 100;
while let Ok(eye) = self.eye_rx.try_recv() {
self.eyes.push_back(eye);
}
while self.eyes.len() > max_eyes {
self.eyes.pop_front();
}
let axis_hints = AxisHints::new_x().min_thickness(2.);
Plot::new("Eye")
.legend(Legend::default())
.show_axes(Vec2b::TRUE)
.custom_x_axes(vec![axis_hints])
.show(ui, |plot_ui| {
//plot_ui.set_auto_bounds(Vec2b { x: false, y: false });
plot_ui.hline(HLine::new("", 0.).color(Color32::DARK_RED).width(2.));
for eye in self.eyes.iter() {
let line = Line::new(
"Eye",
eye.iter()
.enumerate()
.map(|(i, x)| [i as f64, *x as f64])
.collect::<Vec<_>>(),
)
.color(Color32::LIGHT_GREEN);
plot_ui.line(line);
}
})
});
}
}
fn demodulate() {
let mut reader = hound::WavReader::open("audio/modulated.wav").unwrap();
let samples = reader.samples::<i16>();
// Modulation parameters
let frequency = 1700.;
let deviation = 500.;
// Data parameters
let sample_rate = 48000;
let baud_rate = BAUD_RATE;
let sample_per_symbol = sample_rate / baud_rate;
let mut iq_sampler = IQSampler::new(hz_to_rad_per_sample(frequency, sample_rate as f32));
let iq = samples
.map(|x| iq_sampler.sample(x.unwrap() as f32 / i16::MAX as f32))
.collect::<Vec<_>>();
let mut nco_pos = Nco::new(hz_to_rad_per_sample(deviation, sample_rate as f32));
let mut nco_neg = Nco::new(hz_to_rad_per_sample(-deviation, sample_rate as f32));
let corellator_pos = (0..(sample_per_symbol * 1))
.map(|_| {
nco_pos.step();
nco_pos.cexp()
})
.collect::<Vec<_>>();
let corellator_neg = (0..(sample_per_symbol * 1))
.map(|_| {
nco_neg.step();
nco_neg.cexp()
})
.collect::<Vec<_>>();
let mut matched_filter_pos = FIRFilter::new(&corellator_pos);
let mut matched_filter_neg = FIRFilter::new(&corellator_neg);
let mut dem = vec![];
for x in &iq {
let pos = matched_filter_pos.next(x.clone());
let neg = matched_filter_neg.next(*x);
dem.push(pos.mag() - neg.mag());
}
// Symbol recovery
let mut bits = vec![];
let delta = 0.5;
let alpha = 0.01;
let mut current_sps = sample_per_symbol as f32;
let mut current_position = current_sps / 2.;
while current_position < dem.len() as f32 {
// Sample before after
let early_id = (current_position - (delta * current_sps)).max(0.).floor() as u32;
let late_id = (current_position + (delta * current_sps)).max(0.).floor() as u32;
if late_id as usize >= dem.len() {
break;
}
let early = dem[early_id as usize];
let late = dem[late_id as usize];
let error = early * early - late * late;
current_sps -= alpha * error;
bits.push(dem[current_position.floor() as usize] > 0.);
current_position += current_sps;
}
//assert!(bits.len() % 8 == 0);
let mut out_file = File::create("out.txt").unwrap();
let mut strip = 0;
let bit_slice = bits.as_slice();
for i in 0..100 {
let byte = bits_to_byte(&bit_slice[(i as usize)..(i as usize + 8)]);
if byte == 0b01010111u8 {
strip = i + 8;
}
}
for i in 0..strip {
bits.remove(i as usize);
}
for x in bits.chunks(8) {
if x.len() != 8 {
break;
}
out_file.write_all(&[bits_to_byte(x)]).unwrap();
}
}
fn modulate() {
// Modulation parameters
let frequency = 1700.;
let deviation = 500.;
// Data parameter
let sample_rate = 48000;
let baud_rate = BAUD_RATE;
let host = cpal::default_host();
let device = host.default_output_device().unwrap();
let mut supported_configs_range = device.supported_output_configs().unwrap();
let supported_config = supported_configs_range
.find(|config| {
config.sample_format() == cpal::SampleFormat::F32
&& config.min_sample_rate().0 <= 48000
&& config.max_sample_rate().0 >= 48000
})
.expect("Device does not support 48kHz f32 output");
let config = supported_config
.with_sample_rate(cpal::SampleRate(48_000))
.config();
loop {
let mut buffer = String::new();
let stdin = io::stdin(); // We get `Stdin` here.
stdin.read_line(&mut buffer).unwrap();
for c in buffer.bytes() {
print!("{}", c as char);
}
println!();
// Construct payload
let mut bitstream = std::iter::repeat_n(0b01010101u8, 64)
.chain(std::iter::repeat_n(0xD8, 2))
.chain(buffer.bytes())
.chain(std::iter::repeat_n(4u8, 32))
.flat_map(byte_to_bits);
let mut modulator = BFSKMod::new(
sample_rate / baud_rate,
units::frequency::hz_to_rad_per_sample(deviation, sample_rate as f32),
&mut bitstream,
);
let mut lo = Nco::new(units::frequency::hz_to_rad_per_sample(
frequency,
sample_rate as f32,
));
// To send
let stream = modulator
.zip(lo)
.map(|(s, up)| (s * up).re)
.collect::<Vec<_>>();
let sample_clock = Arc::new(AtomicU32::new(0));
let (tx, rx) = channel::<()>();
let stream = device
.build_output_stream(
&config,
move |data: &mut [f32], _: &cpal::OutputCallbackInfo| {
for d in data.iter_mut() {
if sample_clock.load(Ordering::Relaxed) as usize == stream.len() {
tx.send(()).unwrap();
break;
}
*d = stream[sample_clock.fetch_add(1, Ordering::Relaxed) as usize]
}
},
move |err| {
eprintln!("Stream error: {}", err);
},
None,
)
.unwrap();
stream.play().unwrap();
let _ = rx.recv();
stream.pause().unwrap();
}
}
fn byte_to_bits(byte: u8) -> Vec<bool> {
vec![
byte & 1 == 1,
(byte >> 1) & 1 == 1,
(byte >> 2) & 1 == 1,
(byte >> 3) & 1 == 1,
(byte >> 4) & 1 == 1,
(byte >> 5) & 1 == 1,
(byte >> 6) & 1 == 1,
(byte >> 7) & 1 == 1,
]
}
/*
fn bits_to_byte(bits: &[bool]) -> u8 {
bits[7] as u8 |
bits[6] as u8 >> 1 |
bits[5] as u8 >> 2 |
bits[4] as u8 >> 3 |
bits[3] as u8 >> 4 |
bits[2] as u8 >> 5 |
bits[1] as u8 >> 6 |
bits[0] as u8 >> 7
}
*/
fn bits_to_byte(bits: &[bool]) -> u8 {
bits[0] as u8
| (bits[1] as u8) << 1
| (bits[2] as u8) << 2
| (bits[3] as u8) << 3
| (bits[4] as u8) << 4
| (bits[5] as u8) << 5
| (bits[6] as u8) << 6
| (bits[7] as u8) << 7
}

110
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<EFBFBD><EFBFBD>ibidi Toilet[1],[2] est une web-série[3] machinima, créée par Alexey Gerasimov et diffusée sur sa chaîne YouTube DaFuq!?Boom! Produite à l'aide de Source Filmmaker, la série suit une guerre fictive entre des toilettes à tête humaine et des personnages humanoïdes dotés d'appareils électroniques à la place de la tête.
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src/main.rs
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@ -11,16 +11,198 @@ mod windows;
mod ted;
mod math;
use cpal::Data;
use eframe::egui;
use std::{collections::VecDeque, time::Duration};
use tokio::{join, select, time::timeout};
use eframe::{egui, glow::SAMPLE_MASK_VALUE};
use tokio::sync::mpsc::{Receiver, Sender, channel};
use crate::{bfsk::BFSKMod, complex::Complex32, filtering::{dc_block::DCBlocker, fir::FIRFilter}, iq::IQSampler, nco::Nco, ted::elg::ELGate, units::frequency::hz_to_rad_per_sample};
const BAUD_RATE: u32 = 1000;
const SAMPLE_RATE: u32 = 48000;
enum TransceiverState
// Modulation parameters
const CENTER_FREQ: f32 = 1700.;
const DEVIATION: f32 = 500.;
pub trait SampleSender
{
Idle,
Receiving,
Transmitting,
fn open_link(&mut self);
fn send_samples(&mut self, samples: &[f32]);
fn close_link(&mut self);
}
struct Transceiver
{
data_receiver: Receiver<Vec<u8>>,
data_sender: Sender<Vec<u8>>,
samples_sender: Sender<f32>,
}
impl Transceiver
{
pub async fn start<T: SampleSender>(sample_sender: T) -> Self
{
let (transmitter_tx, transmitter_rx) = channel::<Vec<u8>>(4096);
let (acknowledged_tx, acknowledged_rx) = channel::<()>(32);
let (ack_tx, ack_rx) = channel::<()>(32);
let (samples_tx, samples_rx) = channel::<f32>(4096);
let (receiver_tx, receiver_rx) = channel::<Vec<u8>>(4096);
join!(
Self::transmitter(acknowledged_rx, transmitter_rx, ack_rx, sample_sender),
Self::receiver(acknowledged_tx, samples_rx, receiver_tx, ack_tx)
);
Self
{
data_receiver: receiver_rx,
data_sender: transmitter_tx,
samples_sender: samples_tx
}
}
async fn transmitter<T: SampleSender>(mut acknowledged: Receiver<()>, mut data_receiver: Receiver<Vec<u8>>, mut ack_receiver: Receiver<()>, mut samples_sender: T)
{
let mut send_queue: VecDeque<Frame> = VecDeque::new();
loop
{
if !send_queue.is_empty()
{
let to_send = send_queue.pop_front().unwrap();
// Create modulation
let bytes = to_send.bytes();
let mut bit_stream = bytes.iter().flat_map(|x| byte_to_bits(*x));
let mut modulator = BFSKMod::new((SAMPLE_RATE as f32 / BAUD_RATE as f32).round() as u32,
hz_to_rad_per_sample(DEVIATION, SAMPLE_RATE as f32),
&mut bit_stream);
let mut up_lo = Nco::new(hz_to_rad_per_sample(CENTER_FREQ, SAMPLE_RATE as f32));
let mut sample_buffer = vec![];
for (m, up) in modulator.zip(up_lo)
{
let sample = m * up;
sample_buffer.push(sample.re); // Project IQ
}
samples_sender.open_link();
samples_sender.send_samples(&sample_buffer);
samples_sender.close_link();
if let Frame::Data(_) = to_send
{
// Wait for ack
while !acknowledged.is_empty()
{
let _ = acknowledged.blocking_recv();
}
let ack_timout = timeout(Duration::from_secs(2), acknowledged.recv()).await;
if let Ok(Some(())) = ack_timout
{
// ACK Received : Ok
}
else
{
// Try again
send_queue.push_front(to_send);
}
}
}
else
{
let new = select!
{
Some(x) = data_receiver.recv() => Frame::Data(x),
Some(()) = ack_receiver.recv() => Frame::Ack,
};
match new
{
Frame::Ack => send_queue.push_front(Frame::Ack), // Highest importance
Frame::Data(x) => send_queue.push_back(Frame::Data(x))
}
}
}
}
async fn receiver(acknowledged: Sender<()>, mut samples: Receiver<f32>, data_sender: Sender<Vec<u8>>, ack_sender: Sender<()>)
{
let mut iq_sampler = IQSampler::new(hz_to_rad_per_sample(CENTER_FREQ, SAMPLE_RATE as f32));
let samples_per_symbol = (SAMPLE_RATE as f32) / (BAUD_RATE as f32);
let correllator_length = samples_per_symbol as usize;
let mut pos_nco = Nco::new(hz_to_rad_per_sample(DEVIATION, SAMPLE_RATE as f32));
let mut neg_nco = Nco::new(hz_to_rad_per_sample(-DEVIATION, SAMPLE_RATE as f32));
let pos_ir = (0..correllator_length).map(|_| {pos_nco.step(); pos_nco.cexp()});
let neg_ir = (0..correllator_length).map(|_| {neg_nco.step(); neg_nco.cexp()});
let mut pos_correllator = FIRFilter::new(&pos_ir.collect::<Vec<_>>());
let mut neg_correllator = FIRFilter::new(&neg_ir.collect::<Vec<_>>());
let mut matched_lowpass = FIRFilter::new(&vec![Complex32::new(1., 0.); samples_per_symbol as usize]);
let mut dc_block = DCBlocker::new(0.995);
let loop_i = 0.1;
let loop_p = 0.1;
let mut loop_ir = vec![Complex32::new(loop_i, 0.); samples_per_symbol as usize];
loop_ir.push(Complex32::new(loop_p, 0.));
let mut elg = ELGate::new(samples_per_symbol, FIRFilter::new(&loop_ir));
// Frame reconstruction
let mut last_byte = 0x00u8;
let mut frame_constructor = FrameConstructor::new();
let mut bit_count: Option<u32> = None;
while let Some(sample) = samples.recv().await
{
let iq = iq_sampler.sample(sample);
let matched = dc_block.next_real(matched_lowpass.next_real(pos_correllator.next(iq).mag() - neg_correllator.next(iq).mag()));
if let Some(bit_sample) = elg.next(matched)
{
last_byte <<= 1;
last_byte |= (bit_sample > 0.) as u8;
bit_count = bit_count.map(|x| x + 1);
if last_byte == 0xD8 // Potential frame starts
{
last_byte = 0;
frame_constructor = FrameConstructor::new();
bit_count = Some(0);
}
if let Some(8) = bit_count
{
let frame_opt = frame_constructor.add_byte(last_byte);
if let Ok(None) = frame_opt
{
bit_count = Some(0);
}
if let Ok(Some(Frame::Ack)) = frame_opt
{
bit_count = None;
acknowledged.send(()).await.unwrap(); // Send acknowledgement to transmitter
}
if let Ok(Some(Frame::Data(ref frame_data))) = frame_opt
{
bit_count = None;
data_sender.send(frame_data.to_vec()).await.unwrap();
ack_sender.send(()).await.unwrap();
}
if let Err(()) = frame_opt
{
bit_count = None; // Erroneous frame, ignore
}
}
}
}
}
}
enum Frame
@ -29,6 +211,76 @@ enum Frame
Ack
}
type FrameConstructionError = ();
pub struct FrameConstructor
{
frame: Vec<u8>,
frame_countdown: Option<u16>,
checksum: u8,
}
impl FrameConstructor
{
pub fn new() -> Self
{
Self
{
frame: Vec::new(),
frame_countdown: None,
checksum: 0u8,
}
}
pub fn add_byte(&mut self, byte: u8) -> Result<Option<Frame>, FrameConstructionError>
{
if self.frame.is_empty() && byte != 0xC4 && byte != 0x4C
{
return Err(());
}
if self.frame.is_empty() && byte == 0xC4
{
return Ok(Some(Frame::Ack));
}
if self.frame.is_empty() && byte == 0x4C
{
return Ok(None);
}
self.frame.push(byte);
// Retrieve length
if self.frame.len() == 1
{
self.frame_countdown = Some(self.frame[0] as u16);
return Ok(None);
}
if self.frame.len() == 2
{
*self.frame_countdown.as_mut().unwrap() |= (self.frame[1] as u16) << 8;
return Ok(None);
}
if self.frame_countdown.unwrap() == 0
{
// All data has been received
if self.checksum == byte
{
return Ok(Some(Frame::Data(self.frame.iter().skip(2).copied().collect())));
}
return Err(());
}
self.frame.push(byte);
self.checksum ^= byte;
*self.frame_countdown.as_mut().unwrap() -= 1;
Ok(None)
}
}
impl Frame
{
pub fn bytes(&self) -> Vec<u8>
@ -51,6 +303,7 @@ impl Frame
assert!(x.len() < 65536, "Data size over MTU");
let len_u16 = x.len() as u16;
output_bytes.push(0x4C); // DATA FRAME
output_bytes.push((len_u16 & 0xFF).try_into().unwrap());
output_bytes.push(((len_u16 >> 8) & 0xFF).try_into().unwrap());
@ -60,7 +313,7 @@ impl Frame
}
Frame::Ack =>
{
output_bytes.push(0xC4);
output_bytes.push(0xC4); // ACK FRAME
}
}