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#![no_std]
#![no_main]
#![allow(async_fn_in_trait)]
extern crate alloc;
use arrayvec::{ArrayString, ArrayVec};
use defmt::{info, Debug2Format};
use core::{convert::Infallible, fmt::Write, str::FromStr};
use embassy_sync::{
blocking_mutex::raw::CriticalSectionRawMutex, mutex::Mutex, pubsub::PubSubChannel,
};
use embassy_time::Timer;
use embedded_graphics::{
draw_target::DrawTarget,
geometry::OriginDimensions,
mono_font::{ascii::FONT_4X6, MonoTextStyle},
pixelcolor::Gray4,
prelude::*,
primitives::{Circle, PrimitiveStyle, Rectangle},
text::{Alignment, Text},
};
use embedded_hal::digital::StatefulOutputPin;
use lora_phy::{mod_traits::RadioKind, DelayNs, LoRa};
use meshcore::{
crypto::{PrivateKey, PublicKey, SharedSecret},
packet::Packet,
packet_content::PacketContent,
text::ClearText,
};
pub static MESSAGE_CH: PubSubChannel<CriticalSectionRawMutex, ClearText, 3, 2, 1> =
PubSubChannel::new();
pub async fn led_task(
led_pin: &Mutex<CriticalSectionRawMutex, impl StatefulOutputPin<Error = Infallible>>,
) {
let mut subscriber = MESSAGE_CH.subscriber().unwrap();
loop {
let _ = subscriber.next_message().await;
info!("led: got message");
let mut led = led_pin.lock().await;
for _ in 0..3 {
led.set_low().unwrap();
Timer::after_millis(50).await;
led.set_high().unwrap();
Timer::after_millis(50).await;
}
}
}
fn cstr(bytes: &[u8]) -> &str {
let end = bytes.iter().position(|&b| b == 0).unwrap_or(bytes.len());
core::str::from_utf8(&bytes[..end]).unwrap_or("")
}
pub async fn display_task<D>(display: &mut D, mut finish: impl AsyncFnMut(&mut D))
where
D: DrawTarget<Color = Gray4> + OriginDimensions,
<D as DrawTarget>::Error: core::fmt::Debug,
{
let radius: u16 = 10;
let mut pos = Point::new(30, 30);
let mut vel = Point::new(-2, 1);
let pp = Point::new(radius.into(), radius.into());
let bounds = Rectangle::with_corners(Point::new(0, 0), -(pp - display.size()));
let mut lines = ArrayVec::<ArrayString<128>, 8>::new();
let mut subscriber = MESSAGE_CH.subscriber().unwrap();
loop {
// update ball
pos += vel;
let bottom_right = bounds.bottom_right().unwrap();
if pos.x < bounds.top_left.x || pos.x > bottom_right.x {
vel.x = -vel.x;
}
if pos.y < bounds.top_left.y || pos.y > bottom_right.y {
vel.y = -vel.y;
}
pos.x = pos.x.clamp(bounds.top_left.x, bottom_right.x);
pos.y = pos.y.clamp(bounds.top_left.y, bottom_right.y);
// update chat
if let Some(msg) = subscriber.try_next_message_pure() {
info!("display: got message");
if lines.is_full() {
lines.remove(0);
}
let mut str: ArrayString<128> = ArrayString::new();
write!(&mut str, "{}: {}", cstr(&msg.sender), cstr(&msg.message)).unwrap();
lines.push(str);
}
display.clear(Gray4::BLACK).unwrap();
Circle::new(pos, radius.into())
.into_styled(PrimitiveStyle::with_stroke(Gray4::new(4), 3))
.draw(display)
.unwrap();
for (i, line) in lines.iter().enumerate() {
Text::with_alignment(
line,
Point::new(4, 4 + 8 * (i as i32)),
MonoTextStyle::new(&FONT_4X6, Gray4::WHITE),
Alignment::Left,
)
.draw(display)
.unwrap();
}
finish(display).await;
Timer::after_millis(10).await;
}
}
fn hex16(hexstr: &'static str) -> [u8; 16] {
let mut buf = [0u8; 16];
hex::decode_to_slice(hexstr, &mut buf).expect("invalid hex secret");
buf
}
pub async fn radio_task(lora: &mut LoRa<impl RadioKind, impl DelayNs>) {
use lora_phy::mod_params::*;
let keystore = meshcore::no_std_identity::StaticKeystoreInput {
identities:
[PrivateKey::from_str( "5884BEECFA94A15B596C8FE51832B857EB018B37F3E85671971977F5A6139374B9C3ECD2415258A9C233D4CA9332C7BF06EB269B786EA71813DE17DFFF480177", ) .unwrap()]
.into_iter()
.collect(),
contacts: [].into_iter().collect(),
groups: [
SharedSecret::new_from_group_secret(&hex16("8b3387e9c5cdea6ac9e5edbaa115cd72")),
SharedSecret::new_from_group_secret(&hex16("4c97bfe431abe20672259d9b6969dcec")),
]
.into_iter()
.collect(),
}
.compile();
let pk: PublicKey = (&keystore.identities[0].private_key).into();
info!("public key: {:?}", Debug2Format(&pk));
let publisher = MESSAGE_CH.publisher().unwrap();
let mut buffer: [u8; 256] = [0; 256];
let mdltn_params = lora
.create_modulation_params(
SpreadingFactor::_8,
Bandwidth::_62KHz,
CodingRate::_4_8,
869_618_000,
)
.unwrap();
let rx_params = lora
.create_rx_packet_params(16, false, buffer.len() as u8, true, false, &mdltn_params)
.unwrap();
lora.prepare_for_rx(RxMode::Continuous, &mdltn_params, &rx_params)
.await
.unwrap();
loop {
info!("waiting for message");
let res = lora.rx(&rx_params, &mut buffer).await.unwrap();
let message = &buffer[0..res.0.into()];
let packet = Packet::try_from(message).unwrap();
info!("packet {:?}", Debug2Format(&packet));
match packet.content {
PacketContent::Advert(msg) => {
info!("got advert from {}", &msg.name);
}
PacketContent::GroupText(mut msg) => {
msg.decrypt(&keystore).unwrap();
if let Some(text) = msg.cleartext {
unsafe {
info!(
"decrypted group message from {}: {}",
alloc::str::from_utf8_unchecked(&text.sender),
alloc::str::from_utf8_unchecked(&text.message),
);
}
publisher.publish(text).await;
} else {
info!("failed to decrypt group message");
}
}
PacketContent::Text(mut msg) => {
msg.decrypt(&keystore).unwrap();
if let Some(text) = msg.cleartext {
unsafe {
info!(
"decrypted p2p message from {}: {}",
alloc::str::from_utf8_unchecked(&text.sender),
alloc::str::from_utf8_unchecked(&text.message),
);
}
publisher.publish(text).await;
} else {
info!("failed to decrypt p2p message");
}
}
content => {
info!("content: {:?}", Debug2Format(&content));
}
}
}
}
|
