diff --git a/components/libc/posix/delay/delay.c b/components/libc/posix/delay/delay.c
index 753ca485262ce21133f947320ef49d09e0884695..86d50f7e2b54840e849e5abd4c75c8a6c27bd82a 100644
--- a/components/libc/posix/delay/delay.c
+++ b/components/libc/posix/delay/delay.c
@@ -11,15 +11,6 @@
 #include <sys/types.h>
 #include <rtthread.h>
 #include <rthw.h>
-#define DBG_TAG    "POSIX.delay"
-#define DBG_LVL    DBG_INFO
-#include <rtdbg.h>
-
-RT_WEAK void rt_hw_us_delay(rt_uint32_t us)
-{
-    (void) us;
-    LOG_W("Please consider implementing rt_hw_us_delay() in another file.");
-}
 
 void msleep(unsigned int msecs)
 {
diff --git a/include/rtdebug.h b/include/rtdebug.h
index 9fdb4ab910f026ab156d175c57fd6f523d6ecd91..ac5ba6c1c512b20b75f90844dd0e83591c336cce 100644
--- a/include/rtdebug.h
+++ b/include/rtdebug.h
@@ -53,7 +53,7 @@
 #endif
 
 #ifndef RT_DEBUG_DEVICE
-#define RT_DEBUG_DEVICE                0
+#define RT_DEBUG_DEVICE                1
 #endif
 
 #ifndef RT_DEBUG_INIT
diff --git a/src/kservice.c b/src/kservice.c
index 3c4e652c3fdd2a798e2c87eb96e0bb4effcbb808..ff9d3c9cef401b2287f9290a9177411f3973bd8d 100644
--- a/src/kservice.c
+++ b/src/kservice.c
@@ -45,6 +45,13 @@ static volatile int __rt_errno;
 static rt_device_t _console_device = RT_NULL;
 #endif
 
+RT_WEAK void rt_hw_us_delay(rt_uint32_t us)
+{
+    (void) us;
+    RT_DEBUG_LOG(RT_DEBUG_DEVICE, ("rt_hw_us_delay() doesn't support for this board."
+        "Please consider implementing rt_hw_us_delay() in another file."));
+}
+
 /**
  * This function gets the global errno for the current thread.
  *