diff --git a/datalink814_ge/src/common.c b/datalink814_ge/src/common.c
index 67ce4eb..29929e9 100644
--- a/datalink814_ge/src/common.c
+++ b/datalink814_ge/src/common.c
@@ -31,11 +31,12 @@
 
 /*****************************************************************************/
 /**
- * @brief
+ * @brief	Throw an assert.
  *
- * @param
+ * @param	file indicate the filename of the assertion
+ * @param	line indicate which line the assertion occurs
  *
- * @return
+ * @return	NONE.
  *
  ******************************************************************************/
 void AppAssert(const char * file, int line){
diff --git a/datalink814_ge/src/common.h b/datalink814_ge/src/common.h
index ab7b523..fbf0ba5 100644
--- a/datalink814_ge/src/common.h
+++ b/datalink814_ge/src/common.h
@@ -2,11 +2,12 @@
 /**
  * Description: Common definitions
  *
- * Date: 2021-12-04 16:32
+ * Date: 2023-12-21 16:32
  * LastEditors: Fan Hao
  * LastEditTime: 2022-07-16 17:13
  * Revisions: Rev 0.1
  * History:
+ * [2023-12-21]: Ensure the code conform ISO C11 standard.
  * [2022-07-16]: New branch for Dijian.
  * [2021-11-16]: Initial version.
  *
@@ -36,7 +37,7 @@
 /* Stringify */
 #define STR(x)   #x
 
-//#define _814_DEBUG_LEVEL 3
+#define _814_DEBUG_LEVEL 3
 
 #if _814_DEBUG_LEVEL > 0
 #define DBG_PRINT(...)  printf(__VA_ARGS__)