diff --git a/extensions/test/inc/test.h b/extensions/test/inc/test.h
new file mode 100644
index 0000000..1f97066
--- /dev/null
+++ b/extensions/test/inc/test.h
@@ -0,0 +1,30 @@
+/*
+ * @Author: your name
+ * @Date: 2021-09-22 22:33:24
+ * @LastEditTime: 2021-09-22 22:52:45
+ * @LastEditors: Please set LastEditors
+ * @Description: In User Settings Edit
+ * @FilePath: /xcmd/extensions/test/test.h
+ */
+
+#ifndef TEST_H
+#define TEST_H
+
+#include "xcmd.h"
+
+#ifdef __cplusplus
+extern   "C" {
+#endif
+
+
+void test_cmd_init(void);
+void test_keys_init(void);
+
+#ifdef __cplusplus
+        }
+#endif
+
+
+#endif /* TEST_H */
+
+
diff --git a/extensions/test/src/test.c b/extensions/test/src/test.c
new file mode 100644
index 0000000..86cad59
--- /dev/null
+++ b/extensions/test/src/test.c
@@ -0,0 +1,128 @@
+/*
+ * @Author: your name
+ * @Date: 2021-09-22 22:33:17
+ * @LastEditTime: 2021-09-22 23:17:02
+ * @LastEditors: Please set LastEditors
+ * @Description: In User Settings Edit
+ * @FilePath: /xcmd/extensions/test/test.c
+ */
+#include "test.h"
+#include <string.h>
+#include <stdlib.h>
+
+#define EXIT_MESSAGE() xcmd_print(g_cmder, "press \"q\" or \"Q\" to exit!\r\n")
+
+#define EXIT_CHECK()                 \
+    do                               \
+        (toupper(GET_CHAR()) == 'Q') \
+        {                            \
+            uint8_t c;               \
+            if (GET_CHAR(&c))        \
+            {                        \
+                switch (c)           \
+                case 'q':            \
+                case 'Q':            \
+                case 0x1B:           \
+                    return;          \
+            }                        \
+        }                            \
+    while (0);
+
+static uint8_t param_check(int need, int argc, char*argv[])
+{
+    uint8_t i,ret = 0;
+    if(need<(argc))
+    {
+        ret = 1;
+    }
+    else
+    {
+        xcmd_print("err need %d but input %d:\r\n", need, argc-1);
+    	xcmd_print("input= ");
+	    for(i=0; i<argc; i++)
+	    {
+	        if(argv[i] != NULL)
+	        {
+	            xcmd_print("%s ", argv[i]);
+	        }
+	    }
+	    xcmd_print("\r\n");
+        ret = 0;
+    }
+    return ret;
+}
+
+static void cmd_echo(int argc, char* argv[])
+{
+    if(param_check(1, argc, argv))
+	{
+    	xcmd_print("%s\r\n", argv[1]);
+	}
+}
+
+static void cmd_example(int argc, char* argv[])
+{
+    uint8_t i;
+    if(param_check(1, argc, argv))
+	{
+		if(strcmp(argv[1], "-s") == 0)
+		{
+			for(i=2; i<argc; i++)
+		    {
+		    	xcmd_print("%s\r\n", argv[i]);
+			}
+		}
+		if(strcmp(argv[1], "-i") == 0)
+		{
+			for(i=2; i<argc; i++)
+		    {
+		    	xcmd_print("%d\r\n", atoi(argv[i]));
+			}
+		}
+		if(strcmp(argv[1], "-f") == 0)
+		{
+			for(i=2; i<argc; i++)
+		    {
+		    	xcmd_print("%f\r\n", atof(argv[i]));
+			}
+		}
+	}
+}
+
+static void cmd_history(int argc, char* argv[])
+{
+    uint16_t len = xcmd_history_len();
+    xcmd_history_reset();
+    do
+    {
+        xcmd_print("%s\r\n", xcmd_history_next());
+    }while(len--);
+}
+
+static int cmd_ctr_a(void* pv)
+{
+    xcmd_print("this is ctr+a\n");
+    return 0;
+}
+
+static xcmd_t cmds[] = 
+{
+    {"echo", cmd_echo, "echo anything", NULL},
+    {"history", cmd_history, "show history list", NULL},
+    {"example", cmd_example, "example [-f|-i|-s] [val]", NULL},
+};
+
+static xcmd_key_t keys[] = 
+{
+    {CTR_A, cmd_ctr_a,  NULL},
+};
+
+void test_cmd_init(void)
+{
+    xcmd_cmd_register(cmds, sizeof(cmds)/sizeof(xcmd_t));
+}
+
+void test_keys_init(void)
+{
+    xcmd_key_register(keys, sizeof(keys)/sizeof(xcmd_key_t));
+}