Do some research on the MCU protocol

serial-test/src/main.rs

@@ -0,0 +1,17 @@
+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]);
+    }
+}