Do some research on the MCU protocol

serial-test/Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "serial-test"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+anyhow = "1.0.102"
+serialport = "4.9.0"

serial-test/deploy.sh

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+cross build --release --target armv7-unknown-linux-musleabihf
+sshpass -p MTY4ODE2 scp ./target/armv7-unknown-linux-musleabihf/release/serial-test root@192.168.0.86:/root/

serial-test/src/main.rs

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+use std::fs::OpenOptions;
+use std::io::{Read, Write};
+use std::time::Duration;
+
+fn main() -> anyhow::Result<()> {
+    let mut dev = OpenOptions::new()
+        .read(true)
+        .write(true)
+        .open("/dev/rpmsg1")?;
+
+    let mut buf = [0u8; 4096];
+
+    loop {
+        let n = dev.read(&mut buf)?;
+        println!("rpmsg read {n} bytes: {:02x?}", &buf[..n]);
+    }
+}