diff --git a/demo/os/cube-freertos/nucleo-g070rb/Components/EasyLogger_Port/elog_port.c b/demo/os/cube-freertos/nucleo-g070rb/Components/EasyLogger_Port/elog_port.c
index f85d99e..1512a72 100644
--- a/demo/os/cube-freertos/nucleo-g070rb/Components/EasyLogger_Port/elog_port.c
+++ b/demo/os/cube-freertos/nucleo-g070rb/Components/EasyLogger_Port/elog_port.c
@@ -43,8 +43,6 @@ extern osSemaphoreId_t elog_dma_lockHandle;
 ElogErrCode elog_port_init(void) {
     ElogErrCode result = ELOG_NO_ERR;
 
-    osSemaphoreRelease(elog_dma_lockHandle);
-    osSemaphoreRelease(elog_lockHandle);
     /* add your code here */
 
     return result;
@@ -65,6 +63,7 @@ void elog_port_deinit(void) {
  */
 void elog_port_output(const char *log, size_t size) {
     HAL_UART_Transmit_DMA(&huart2, (uint8_t *) log, size);
+    osSemaphoreAcquire(elog_dma_lockHandle, osWaitForever);
 }
 
 /**
@@ -116,30 +115,28 @@ void elog_async_output_notice(void) {
 
 void elog_entry(void *para) {
     size_t get_log_size = 0;
+#ifdef ELOG_ASYNC_LINE_OUTPUT
     static char poll_get_buf[ELOG_LINE_BUF_SIZE - 4];
+#else
+    static char poll_get_buf[ELOG_ASYNC_OUTPUT_BUF_SIZE - 4];
+#endif
 
-    if (elog_port_init() != ELOG_NO_ERR) {
-        goto fail;
-    }
-
-    while (1) {
-        if (osOK ==
-            osSemaphoreAcquire(elog_asyncHandle, osWaitForever)) {
-            while (1) {
-                if (osOK ==
-                    osSemaphoreAcquire(elog_dma_lockHandle, osWaitForever)) {
-                    get_log_size = elog_async_get_line_log(poll_get_buf, sizeof(poll_get_buf));
-                    if (get_log_size) {
-                        elog_port_output(poll_get_buf, get_log_size);
-                    } else {
-                        osSemaphoreRelease(elog_dma_lockHandle);
-                        break;
-                    }
-                }
+    for(;;)
+    {
+        /* waiting log */
+        osSemaphoreAcquire(elog_asyncHandle, osWaitForever);
+        /* polling gets and outputs the log */
+        while (1) {
+#ifdef ELOG_ASYNC_LINE_OUTPUT
+            get_log_size = elog_async_get_line_log(poll_get_buf, sizeof(poll_get_buf));
+#else
+            get_log_size = elog_async_get_log(poll_get_buf, sizeof(poll_get_buf));
+#endif
+            if (get_log_size) {
+                elog_port_output(poll_get_buf, get_log_size);
+            } else {
+                break;
             }
         }
     }
-
-    fail:
-    osThreadExit();
 }
diff --git a/docs/zh/port/flash.md b/docs/zh/port/flash.md
index 7823917..9242f91 100644
--- a/docs/zh/port/flash.md
+++ b/docs/zh/port/flash.md
@@ -36,7 +36,7 @@ ElogErrCode elog_flash_port_init(void)
 
 ### 3.2 Flash中的日志被读取后的输出接口
 
-将日志从Flash中读取后，调用`elog_flash_outout()`、`elog_flash_outout_all()`及`elog_flash_outout_recent()`进行输出展示时，将会调用此移植接口。可以在里面增加输出到终端、网络等功能。
+将日志从Flash中读取后，调用`elog_flash_output()`、`elog_flash_output_all()`及`elog_flash_output_recent()`进行输出展示时，将会调用此移植接口。可以在里面增加输出到终端、网络等功能。
 
 ```C
 void elog_flash_port_output(const char *log, size_t size)
@@ -75,7 +75,7 @@ void elog_flash_port_unlock(void)
 配置时需要修改项目中的`elog_flash_cfg.h`文件，开启、关闭、修改对应的宏即可。
 
 ### 4.1 缓冲模式
-    
+
 开启后，需要写入Flash的日志会先存储至RAM缓冲区，当缓冲区满时，缓冲区中的所有日志将自动写入Flash。如果关闭，所有日志在输出时会立刻写入Flash。
 
 - 默认状态：开启
diff --git a/easylogger/inc/elog.h b/easylogger/inc/elog.h
index 719f4fb..978dbc4 100755
--- a/easylogger/inc/elog.h
+++ b/easylogger/inc/elog.h
@@ -73,6 +73,7 @@ extern "C" {
 #endif
 
 #ifndef ELOG_OUTPUT_ENABLE
+    #define elog_raw(...)
     #define elog_assert(tag, ...)
     #define elog_error(tag, ...)
     #define elog_warn(tag, ...)
@@ -80,6 +81,7 @@ extern "C" {
     #define elog_debug(tag, ...)
     #define elog_verbose(tag, ...)
 #else /* ELOG_OUTPUT_ENABLE */
+    #define elog_raw(...)  elog_raw_output(__VA_ARGS__)
     #if ELOG_OUTPUT_LVL >= ELOG_LVL_ASSERT
         #define elog_assert(tag, ...) \
                 elog_output(ELOG_LVL_ASSERT, tag, __FILE__, __FUNCTION__, __LINE__, __VA_ARGS__)
@@ -191,7 +193,7 @@ void elog_set_filter_tag(const char *tag);
 void elog_set_filter_kw(const char *keyword);
 void elog_set_filter_tag_lvl(const char *tag, uint8_t level);
 uint8_t elog_get_filter_tag_lvl(const char *tag);
-void elog_raw(const char *format, ...);
+void elog_raw_output(const char *format, ...);
 void elog_output(uint8_t level, const char *tag, const char *file, const char *func,
         const long line, const char *format, ...);
 void elog_output_lock_enabled(bool enabled);
diff --git a/easylogger/src/elog.c b/easylogger/src/elog.c
index 1bc3b88..421a110 100755
--- a/easylogger/src/elog.c
+++ b/easylogger/src/elog.c
@@ -503,7 +503,7 @@ uint8_t elog_get_filter_tag_lvl(const char *tag)
  * @param format output format
  * @param ... args
  */
-void elog_raw(const char *format, ...) {
+void elog_raw_output(const char *format, ...) {
     va_list args;
     size_t log_len = 0;
     int fmt_result;
@@ -915,7 +915,7 @@ void elog_hexdump(const char *name, uint8_t width, const void *buf, uint16_t siz
         elog_async_output(ELOG_LVL_DEBUG, log_buf, log_len);
 #elif defined(ELOG_BUF_OUTPUT_ENABLE)
         extern void elog_buf_output(const char *log, size_t size);
-    elog_buf_output(log_buf, log_len);
+        elog_buf_output(log_buf, log_len);
 #else
         elog_port_output(log_buf, log_len);
 #endif
diff --git a/easylogger/src/elog_async.c b/easylogger/src/elog_async.c
index a8b7e2f..95db74b 100755
--- a/easylogger/src/elog_async.c
+++ b/easylogger/src/elog_async.c
@@ -80,8 +80,10 @@ static pthread_t async_output_thread;
 
 /* Initialize OK flag */
 static bool init_ok = false;
+#ifdef ELOG_ASYNC_OUTPUT_USING_PTHREAD
 /* thread running flag */
 static bool thread_running = false;
+#endif
 /* asynchronous output mode enabled flag */
 static bool is_enabled = false;
 /* asynchronous output mode's ring buffer */