diff --git a/.cargo/config.toml b/.cargo/config.toml
index 055846d07c67d56433cbe56dd3079a2d2a4d808a..a50fdf1a7952230fbf22384cc06ba60456172079 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -58,3 +58,6 @@ rustflags = [
   "--cfg",
   'LOS_PATH="../../stm32/LiteOS"',
 ]
+
+[build]
+target="thumbv7m-none-eabi"
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000000000000000000000000000000000000..513cbeb9d40d194855d83ea90af0123f31f55eba
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,3 @@
+{
+    "rust-analyzer.checkOnSave.allTargets": false
+}
\ No newline at end of file
diff --git a/Cargo.toml b/Cargo.toml
index 01449a66285194f098432b389111bb48f3723081..d8692d0ddce07498bd2858edffc327fa4856120e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -36,6 +36,9 @@ windows-sys = { version = "0.36.1", features = [
   "Win32_System_SystemServices",
 ] }
 
+[[example]]
+name="led"
+crate-type=["staticlib"]
 
 [profile.dev]
 panic = "abort"
diff --git a/examples/led.rs b/examples/led.rs
new file mode 100644
index 0000000000000000000000000000000000000000..c6ed68c5a7ed7038004b9fc57062547e8f9eaf58
--- /dev/null
+++ b/examples/led.rs
@@ -0,0 +1,19 @@
+#![no_std]
+
+use stdlib::thread::{self};
+
+extern "C" {
+    fn led_toggle();
+}
+#[no_mangle]
+extern "C" fn app_init() {
+    loop {
+        unsafe { led_toggle() };
+        thread::sleep(1000);
+    }
+}
+#[cfg(not(test))]
+#[panic_handler]
+pub fn painc_handler(_info: &core::panic::PanicInfo<'_>) -> ! {
+    loop {}
+}
diff --git a/examples/test_condvar.rs b/examples/test_condvar.rs
index ca45012460e0596bf343956838be7895663dd817..33a9a33ec20bfd411fc78b742ea2d81f041bb159 100644
--- a/examples/test_condvar.rs
+++ b/examples/test_condvar.rs
@@ -1,9 +1,18 @@
+#![cfg_attr(liteos, no_std)]
+
+extern crate alloc;
+use alloc::string::ToString;
+
+#[no_mangle]
+extern "C" fn app_init() {
+    main();
+}
 fn main() {
     use stdlib::thread::{self, *};
 
     sleep(100);
     let a = Builder::new()
-        .name("asdf".to_owned())
+        .name("asdf".to_string())
         .stack_size(1024)
         .spawn(|| {
             thread::yield_now();
diff --git a/examples/test_mutex.rs b/examples/test_mutex.rs
index 42dea28d80fc334599de92b662721589cdf0ae0c..608ac2803099a3368d67be90b7c5c400ff210b9e 100644
--- a/examples/test_mutex.rs
+++ b/examples/test_mutex.rs
@@ -1,3 +1,13 @@
+#![cfg_attr(liteos, no_std)]
+
+extern crate alloc;
+
+#[no_mangle]
+extern "C" fn app_init() {
+    main();
+}
+
+#[cfg(not(liteos))]
 fn main() {
     use stdlib::sync::Mutex;
     let mut mt = Mutex::new(0);
@@ -16,3 +26,6 @@ fn main() {
     let v = mt.into_inner();
     assert_eq!(v, 45);
 }
+
+#[cfg(liteos)]
+fn main() {}
diff --git a/src/no_std/error.rs b/src/no_std/error.rs
index 66727739e5452a7a51bd499d24b8aa6de7274176..13ea387883428774ac8e3281203b3224cf7e5ed2 100644
--- a/src/no_std/error.rs
+++ b/src/no_std/error.rs
@@ -1,4 +1,4 @@
-#[cfg(test)]
+#[cfg(all(test,not(target_os="none")))]
 mod tests;
 
 use alloc::borrow::Cow;
diff --git a/src/no_std/io/error.rs b/src/no_std/io/error.rs
index 6006dd90b1f67540917b73dccef8b0695440c395..297671b59849824baeea64cd80d10f7e8ccd9025 100644
--- a/src/no_std/io/error.rs
+++ b/src/no_std/io/error.rs
@@ -1,4 +1,4 @@
-#[cfg(test)]
+#[cfg(all(test,not(target_os="none")))]
 mod tests;
 use core::{
     fmt::{Debug, Display},
diff --git a/src/no_std/thread.rs b/src/no_std/thread.rs
index 201880e768485680d1248e1fd13b27e85df32750..a06fcd9e995a24da91f9c32982a5ab27e6203b71 100644
--- a/src/no_std/thread.rs
+++ b/src/no_std/thread.rs
@@ -1,4 +1,4 @@
-#[cfg(test)]
+#[cfg(all(test,not(target_os="none")))]
 mod tests;
 use crate::io::Result;
 use alloc::{boxed::Box, string::String, sync::Arc};