add get input_dev events in user app, but still have some problems

user/src/bin/inputdev_event.rs

@@ -0,0 +1,21 @@
+#![no_std]
+#![no_main]
+
+use user_lib::{event_get};
+
+#[macro_use]
+extern crate user_lib;
+
+#[no_mangle]
+pub fn main() -> i32 {
+    println!("Input device event test");
+    let mut event=0;
+    for _ in 0..3 {
+        while event==0 {
+            event = event_get();
+        }    
+        println!("event: {:?}", event);
+    }
+
+    0
+}