diff --git a/kernel/src/entry.rs b/kernel/src/entry.rs
index 573cb36..a3ad447 100644
--- a/kernel/src/entry.rs
+++ b/kernel/src/entry.rs
@@ -35,11 +35,15 @@ pub extern "C" fn rust_main(hart_id: usize, device_tree_addr: usize) -> ! {
     Hardware::enable_interrupt();
 
     loop {
-        if let Some(ch) = CONSOLE.lock().try_read() {
-            debug!("Key: {}", ch);
-            if ch == b'q' {
-                break;
-            }
+        let data = CONSOLE.lock().try_read();
+        match data {
+            Some(ch) => {
+                debug!("Key: {}", ch as char);
+                if ch == b'q' {
+                    break;
+                }
+            },
+            None => continue,
         }
     }