diff --git a/demo/os/rt-thread/stm32f10x/components/easylogger/port/elog_port.c b/demo/os/rt-thread/stm32f10x/components/easylogger/port/elog_port.c
index 401f611..9377bb8 100644
--- a/demo/os/rt-thread/stm32f10x/components/easylogger/port/elog_port.c
+++ b/demo/os/rt-thread/stm32f10x/components/easylogger/port/elog_port.c
@@ -47,10 +47,13 @@ ElogErrCode elog_port_init(void) {
 
 /**
  * output log port interface
+ *
+ * @param log output of log
+ * @param size log size
  */
-void elog_port_output(const char *output, size_t size) {
+void elog_port_output(const char *log, size_t size) {
     /* output to terminal */
-    rt_kprintf("%.*s", size, output);
+    rt_kprintf("%.*s", size, log);
     //TODO output to flash
 }
 
diff --git a/easylogger/inc/elog.h b/easylogger/inc/elog.h
index 038e594..4e9a2a9 100644
--- a/easylogger/inc/elog.h
+++ b/easylogger/inc/elog.h
@@ -64,7 +64,7 @@ enum {
 /* output newline sign */
 #define ELOG_NEWLINE_SIGN                    "\r\n"
 /* EasyLogger software version number */
-#define ELOG_SW_VERSION                      "0.07.25"
+#define ELOG_SW_VERSION                      "0.07.28"
 
 /* EasyLogger assert for developer. */
 #define ELOG_ASSERT(EXPR)                                                     \
@@ -195,7 +195,7 @@ size_t elog_strcpy(size_t cur_len, char *dst, const char *src);
 
 /* elog_port.c */
 ElogErrCode elog_port_init(void);
-void elog_port_output(const char *output, size_t size);
+void elog_port_output(const char *log, size_t size);
 void elog_port_output_lock(void);
 void elog_port_output_unlock(void);
 const char *elog_port_get_time(void);
diff --git a/easylogger/src/elog_flash.c b/easylogger/plugins/flash/elog_flash.c
similarity index 99%
rename from easylogger/src/elog_flash.c
rename to easylogger/plugins/flash/elog_flash.c
index 9495668..fe0ca30 100644
--- a/easylogger/src/elog_flash.c
+++ b/easylogger/plugins/flash/elog_flash.c
@@ -58,7 +58,7 @@ static void log_buf_lock(void);
 static void log_buf_unlock(void);
 
 /**
- * EasyLogger flash save plugin initialize.
+ * EasyLogger flash log plugin initialize.
  *
  * @return result
  */
@@ -73,6 +73,8 @@ ElogErrCode elog_flash_init(void) {
     cur_buf_size = 0;
 #endif
 
+    /* port initialize */
+    elog_flash_port_init();
     /* initialize OK */
     init_ok = true;
 
diff --git a/easylogger/inc/elog_flash.h b/easylogger/plugins/flash/elog_flash.h
similarity index 85%
rename from easylogger/inc/elog_flash.h
rename to easylogger/plugins/flash/elog_flash.h
index c09af5f..1b27990 100644
--- a/easylogger/inc/elog_flash.h
+++ b/easylogger/plugins/flash/elog_flash.h
@@ -35,12 +35,12 @@
 extern "C" {
 #endif
 
-/* EasyLogger flash save plugin's using buffer mode */
+/* EasyLogger flash log plugin's using buffer mode */
 #define ELOG_FLASH_USING_BUF_MODE
-/* EasyLogger flash save plugin's RAM buffer size */
+/* EasyLogger flash log plugin's RAM buffer size */
 #define ELOG_FLASH_BUF_SIZE                  1024
-/* EasyLogger flash save plugin's software version number */
-#define ELOG_FLASH_SW_VERSION                "0.07.04"
+/* EasyLogger flash log plugin's software version number */
+#define ELOG_FLASH_SW_VERSION                "0.07.28"
 
 /* elog_flash.c */
 ElogErrCode elog_flash_init(void);
@@ -56,8 +56,9 @@ void elog_flash_lock_enabled(bool enabled);
 void elog_flash_flush(void);
 #endif
 
-/* elog_port.c */
-void elog_flash_port_output(const char *output, size_t size);
+/* elog_flash_port.c */
+ElogErrCode elog_flash_port_init(void);
+void elog_flash_port_output(const char *log, size_t size);
 void elog_flash_port_lock(void);
 void elog_flash_port_unlock(void);
 
diff --git a/easylogger/plugins/flash/elog_flash_port.c b/easylogger/plugins/flash/elog_flash_port.c
new file mode 100644
index 0000000..25d4f16
--- /dev/null
+++ b/easylogger/plugins/flash/elog_flash_port.c
@@ -0,0 +1,72 @@
+/*
+ * This file is part of the EasyLogger Library.
+ *
+ * Copyright (c) 2015, Armink, <armink.ztl@gmail.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * 'Software'), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Function: Portable interface for EasyLogger's flash log pulgin.
+ * Created on: 2015-07-28
+ */
+
+#include "elog_flash.h"
+
+/**
+ * EasyLogger flash log pulgin port initialize
+ *
+ * @return result
+ */
+ElogErrCode elog_flash_port_init(void) {
+    ElogErrCode result = ELOG_NO_ERR;
+    
+    /* add your code here */
+
+    return result;
+}
+
+/**
+ * output flash saved log port interface
+ *
+ * @param log flash saved log
+ * @param size log size
+ */
+void elog_flash_port_output(const char *log, size_t size) {
+    
+    /* add your code here */
+    
+}
+
+/**
+ * flash log lock
+ */
+void elog_flash_port_lock(void) {
+    
+    /* add your code here */
+    
+}
+
+/**
+ * flash log unlock
+ */
+void elog_flash_port_unlock(void) {
+    
+    /* add your code here */
+    
+}
diff --git a/easylogger/port/elog_port.c b/easylogger/port/elog_port.c
index b46fcac..b690218 100644
--- a/easylogger/port/elog_port.c
+++ b/easylogger/port/elog_port.c
@@ -45,22 +45,16 @@ ElogErrCode elog_port_init(void) {
 
 /**
  * output log port interface
+ *
+ * @param log output of log
+ * @param size log size
  */
-void elog_port_output(const char *output, size_t size) {
+void elog_port_output(const char *log, size_t size) {
     
     /* add your code here */
     
 }
 
-/**
- * output flash saved log port interface
- */
-void elog_flash_port_output(const char *output, size_t size) {
-    
-    /* If used flash log plugin, then you must implement this function. */
-    
-}
-
 /**
  * output lock
  */
@@ -79,25 +73,6 @@ void elog_port_output_unlock(void) {
     
 }
 
-/**
- * flash log lock
- */
-void elog_flash_port_lock(void) {
-    
-    /* If used flash log plugin, then you must implement this function. */
-    
-}
-
-/**
- * flash log unlock
- */
-void elog_flash_port_unlock(void) {
-    
-    /* If used flash log plugin, then you must implement this function. */
-    
-}
-
-
 /**
  * get current time interface
  *