diff --git a/components/finsh/shell.c b/components/finsh/shell.c
index 0d416251843f99c55a0ce36efac2a10a76dc1947..7d7bce68b0345409bc15019e377897aec208625e 100644
--- a/components/finsh/shell.c
+++ b/components/finsh/shell.c
@@ -883,8 +883,9 @@ int finsh_system_init(void)
                             &finsh_thread_stack[0], sizeof(finsh_thread_stack),
                             FINSH_THREAD_PRIORITY, 10);
 #endif /* RT_USING_HEAP */
-
+#ifdef RT_USING_DEVICE
     rt_sem_init(&(shell->rx_sem), "shrx", 0, 0);
+#endif
     finsh_set_prompt_mode(1);
 
     if (tid != NULL && result == RT_EOK)
diff --git a/components/finsh/shell.h b/components/finsh/shell.h
index e6b1921c603db9e2104d8f283982843395032ed1..4a2cc765898fde40b44e52e9182d974138cd4203 100644
--- a/components/finsh/shell.h
+++ b/components/finsh/shell.h
@@ -60,7 +60,9 @@ enum input_stat
 };
 struct finsh_shell
 {
+#ifdef RT_USING_DEVICE
     struct rt_semaphore rx_sem;
+#endif
 
     enum input_stat stat;
 
diff --git a/components/libc/compilers/armlibc/stubs.c b/components/libc/compilers/armlibc/stubs.c
index 5d9331ba17a9d436143aab6908cf22503bffde48..c6e7926a6bdd6e8345623644dee450a951d50ef2 100644
--- a/components/libc/compilers/armlibc/stubs.c
+++ b/components/libc/compilers/armlibc/stubs.c
@@ -11,6 +11,9 @@
  *                             in msh.
  * 2020-08-05     Meco Man     fixed _sys_flen() compiling-warning when
  *                             RT_USING_DFS is not defined
+ * 2023-06-06     LiuYan       修改 _sys_write() 解决当 RT_USING_DEVICE 未
+ *                             定义时 printf 无效的问题;使用 rt_kputs 替换 
+ *                             rt_kprintf，优化速度。
  */
 
 #include <string.h>
@@ -179,7 +182,10 @@ int _sys_write(FILEHANDLE fh, const unsigned char *buf, unsigned len, int mode)
 
     if ((fh == STDOUT) || (fh == STDERR))
     {
-#if !defined(RT_USING_CONSOLE) || !defined(RT_USING_DEVICE)
+#if !defined(RT_USING_CONSOLE)
+        return 0;
+#elif !defined(RT_USING_DEVICE)
+        rt_kputs((const char *)buf);
         return 0;
 #else
 #ifdef RT_USING_POSIX
@@ -246,10 +252,10 @@ char *_sys_command_string(char *cmd, int len)
 void _ttywrch(int ch)
 {
 #ifdef RT_USING_CONSOLE
-    char c;
+    char c[2] = {0};
 
-    c = (char)ch;
-    rt_kprintf(&c);
+    c[0] = (char)ch;
+    rt_kputs(c);
 #endif
 }
 
@@ -315,7 +321,7 @@ int fputc(int c, FILE *f)
     char ch[2] = {0};
 
     ch[0] = c;
-    rt_kprintf(&ch[0]);
+    rt_kputs(&ch[0]);
     return 1;
 }
 
diff --git a/components/libc/compilers/common/time.c b/components/libc/compilers/common/time.c
index 6c184fbf43ed9d933b4fc08fca0b5506c4e8f360..7ea612342c42cbef41f3908f361bcdbd9a0d1a99 100644
--- a/components/libc/compilers/common/time.c
+++ b/components/libc/compilers/common/time.c
@@ -226,8 +226,8 @@ int gettimeofday(struct timeval *tp, void *ignore)
         tp->tv_usec = 0;
     }
 #else
-    tv->tv_sec = 0;
-    tv->tv_usec = 0;
+    tp->tv_sec = 0;
+    tp->tv_usec = 0;
 #endif
 
     return time;
diff --git a/components/utilities/ulog/ulog.c b/components/utilities/ulog/ulog.c
index 757fa5276c073b0c02247632f3ca52cf7aa09d82..c5fb53f8991cf66bb7f735417e79bbbe86363d50 100644
--- a/components/utilities/ulog/ulog.c
+++ b/components/utilities/ulog/ulog.c
@@ -280,7 +280,7 @@ RT_WEAK rt_size_t ulog_formater(char *log_buf, rt_uint32_t level, const char *ta
         log_buf[log_len + 1 + tick_len + 1] = '\0';
 #endif /* ULOG_TIME_USING_TIMESTAMP */
 
-        log_len += rt_strlen(log_buf + log_len);
+        log_len += rt_strlen(log_buf) + log_len;
     }
 #endif /* ULOG_OUTPUT_TIME */
 
@@ -368,6 +368,8 @@ RT_WEAK rt_size_t ulog_formater(char *log_buf, rt_uint32_t level, const char *ta
     if (newline)
     {
         log_len += ulog_strcpy(log_len, log_buf + log_len, ULOG_NEWLINE_SIGN);
+        log_buf[log_len] = 0;
+        log_len++;
     }
 
 #ifdef ULOG_USING_COLOR