ESP

common/.gitignore

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+target

common/Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "common"
+version = "0.1.0"
+dependencies = [
+ "embedded-hal",
+]
+
+[[package]]
+name = "embedded-hal"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "361a90feb7004eca4019fb28352a9465666b24f840f5c3cddf0ff13920590b89"

common/Cargo.toml

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+[package]
+name = "common"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+embedded-hal = "1.0.0"

common/rustfmt.toml

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+hard_tabs = true
+newline_style = "Unix"
+imports_granularity = "Crate"
+
+unstable_features = true
+format_code_in_doc_comments = true
+format_macro_bodies = true
+format_macro_matchers = true
+format_strings = true

common/src/cm.rs

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+/// CPU to Modem
+pub enum CMMessage {
+	Ping(u32),
+	Pong(u32),
+}

common/src/lib.rs

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+pub mod cm;
+pub mod mc;
+
+pub const VERSION: u32 = 1;
+
+enum State {
+	/// Not ready, not even pinged
+	Idle,
+	/// Ping failed
+	Fail,
+	/// Waiting for pong
+	Pinging,
+	/// Ready to work
+	Ready,
+}

common/src/mc.rs

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+use crate::{cm::CMMessage, State};
+
+/// Modem to CPU
+pub enum MCMessage {
+	Ping(u32),
+	Pong(u32),
+}
+
+/// Modem-side connection driver
+pub struct MCConnection<SPI> {
+	spi: SPI,
+	state: State,
+}
+
+impl<SPI> MCConnection<SPI> where SPI: embedded_hal::spi::SpiDevice {
+	pub fn new(spi: SPI) -> Self {
+		Self {
+			spi,
+			state: State::Idle,
+		}
+	}
+
+	fn handle_message(message: CMMessage) {
+		
+	}
+}