diff --git a/APP_Framework/Applications/Make.defs b/APP_Framework/Applications/Make.defs
index 581c8c124..03adcc80f 100644
--- a/APP_Framework/Applications/Make.defs
+++ b/APP_Framework/Applications/Make.defs
@@ -2,6 +2,7 @@
 # APP_Framework/Applications/Make.defs
 ############################################################################
 CONFIGURED_APPS += $(APPDIR)/../../../APP_Framework/Applications
+CONFIGURED_APPS += $(APPDIR)/../../../APP_Framework/Applications/app_test
 CONFIGURED_APPS += $(APPDIR)/../../../APP_Framework/Applications/general_functions/list
 
 include $(wildcard $(APPDIR)/../../../APP_Framework/Applications/*/Make.defs)
diff --git a/APP_Framework/Applications/app_test/Kconfig b/APP_Framework/Applications/app_test/Kconfig
index 5c038893f..b2e94cf6e 100644
--- a/APP_Framework/Applications/app_test/Kconfig
+++ b/APP_Framework/Applications/app_test/Kconfig
@@ -29,5 +29,9 @@ menu "test app"
                             default "/dev/dac_dev"
                     endif
                 endif
+
+            config USER_TEST_SEMC
+                bool "Config test semc sdram"
+                default n
         endif
 endmenu
diff --git a/APP_Framework/Applications/app_test/Make.defs b/APP_Framework/Applications/app_test/Make.defs
new file mode 100755
index 000000000..792848910
--- /dev/null
+++ b/APP_Framework/Applications/app_test/Make.defs
@@ -0,0 +1,7 @@
+############################################################################
+# APP_Framework/Applications/app_test/Make.defs
+############################################################################
+CONFIGURED_APPS += $(APPDIR)/../../../APP_Framework/Applications/app_test
+
+include $(wildcard $(APPDIR)/../../../APP_Framework/Applications/app_test/*/Make.defs)
+
diff --git a/APP_Framework/Applications/app_test/Makefile b/APP_Framework/Applications/app_test/Makefile
index 8a74e5531..c6f0f3a9d 100644
--- a/APP_Framework/Applications/app_test/Makefile
+++ b/APP_Framework/Applications/app_test/Makefile
@@ -1,4 +1,4 @@
-SRC_FILES := 
+SRC_FILES :=
 
 ifeq ($(CONFIG_USER_TEST_SPI_FLASH),y)
 	SRC_FILES += test_spi_flash.c
@@ -12,4 +12,18 @@ ifeq ($(CONFIG_USER_TEST_DAC),y)
 	SRC_FILES += test_dac.c
 endif
 
+ifeq ($(CONFIG_USER_TEST_SEMC),y)
+	SRC_FILES += test_extsram.c
+endif
+
+ifeq ($(CONFIG_ADD_XIZI_FETURES),y)
 include $(KERNEL_ROOT)/compiler.mk
+endif
+
+include $(KERNEL_ROOT)/.config
+ifeq ($(CONFIG_ADD_NUTTX_FETURES),y)
+    include $(APPDIR)/Make.defs
+    CSRCS += test_extsram.c
+    include $(APPDIR)/Application.mk
+endif
+
diff --git a/APP_Framework/Applications/app_test/test_extsram.c b/APP_Framework/Applications/app_test/test_extsram.c
new file mode 100755
index 000000000..7ab4a173e
--- /dev/null
+++ b/APP_Framework/Applications/app_test/test_extsram.c
@@ -0,0 +1,97 @@
+
+#ifdef ADD_XIZI_FETURES
+#include <xizi.h>
+#endif
+
+#include <stdio.h>
+#include <stdint.h>
+#include "transform.h"
+
+/* parameters for sram peripheral */
+// /* stm32f4 Bank3:0X68000000 */
+// #define SRAM_BANK_ADDR       ((uint32_t)0X68000000)
+
+/* OK-1052 semc:0X80000000 */
+#define SRAM_BANK_ADDR       ((uint32_t)0X80000000)
+
+/* data width: 8, 16, 32 */
+#define SRAM_DATA_WIDTH      16
+
+/* sram size */
+#define SRAM_SIZE            ((uint32_t)0x2000000)
+
+#define TICK_PER_SECOND 100
+
+int extsram_test(void)
+{
+    int i = 0;
+    uint32_t start_time = 0, time_cast = 0;
+#if SRAM_DATA_WIDTH == 8
+    char data_width = 1;
+    uint8_t data = 0;
+#elif SRAM_DATA_WIDTH == 16
+    char data_width = 2;
+    uint16_t data = 0;
+#else
+    char data_width = 4;
+    uint32_t data = 0;
+#endif
+
+    /* write data */
+    printf("Writing the %ld bytes data, waiting....", SRAM_SIZE);
+    start_time = PrivGetTickTime();
+    for (i = 0; i < SRAM_SIZE / data_width; i++)
+    {
+#if SRAM_DATA_WIDTH == 8
+        *(volatile uint8_t *)(SRAM_BANK_ADDR + i * data_width) = (uint8_t)0x55;
+#elif SRAM_DATA_WIDTH == 16
+        *(volatile uint16_t *)(SRAM_BANK_ADDR + i * data_width) = (uint16_t)0x5555;
+#else
+        *(volatile uint32_t *)(SRAM_BANK_ADDR + i * data_width) = (uint32_t)0x55555555;
+#endif
+    }
+    time_cast = PrivGetTickTime() - start_time;
+    printf("Write data success, total time: %ld.%03ldS.\n", time_cast / TICK_PER_SECOND,
+          time_cast % TICK_PER_SECOND / ((TICK_PER_SECOND * 1 + 999) / 1000));
+
+    /* read data */
+    printf("start Reading and verifying data, waiting....\n");
+    for (i = 0; i < SRAM_SIZE / data_width; i++)
+    {
+#if SRAM_DATA_WIDTH == 8
+        data = *(volatile uint8_t *)(SRAM_BANK_ADDR + i * data_width);
+        if (data != 0x55)
+        {
+            printf("SRAM test failed!");
+            break;
+        }
+#elif SRAM_DATA_WIDTH == 16
+        data = *(volatile uint16_t *)(SRAM_BANK_ADDR + i * data_width);
+        if (data != 0x5555)
+        {
+            printf("SRAM test failed! data = 0x%x\n",data);
+            break;
+        }
+#else
+        data = *(volatile uint32_t *)(SRAM_BANK_ADDR + i * data_width);
+        if (data != 0x55555555)
+        {
+            printf("SRAM test failed!");
+            break;
+        }
+#endif
+    }
+
+    if (i >= SRAM_SIZE / data_width)
+    {
+        printf("SRAM test success!\n");
+    }
+
+    return 0;
+}
+
+#ifdef ADD_XIZI_FETURES
+SHELL_EXPORT_CMD(SHELL_CMD_PERMISSION(0)|SHELL_CMD_TYPE(SHELL_TYPE_CMD_FUNC)|SHELL_CMD_PARAM_NUM(0),
+    sram_test, sram_test, sram_test);
+#endif
+
diff --git a/Ubiquitous/Nuttx_Fusion_XiUOS/aiit_board/xidatong-arm32/configs/mmnsh/defconfig b/Ubiquitous/Nuttx_Fusion_XiUOS/aiit_board/xidatong-arm32/configs/mmnsh/defconfig
index 2c6697e66..e38a4d7e5 100755
--- a/Ubiquitous/Nuttx_Fusion_XiUOS/aiit_board/xidatong-arm32/configs/mmnsh/defconfig
+++ b/Ubiquitous/Nuttx_Fusion_XiUOS/aiit_board/xidatong-arm32/configs/mmnsh/defconfig
@@ -66,3 +66,5 @@ CONFIG_TESTING_MM=y
 CONFIG_TESTING_MM_PROGNAME="mm"
 CONFIG_TESTING_MM_PRIORITY=100
 CONFIG_TESTING_MM_STACKSIZE=2048
+CONFIG_USER_TEST=y
+CONFIG_USER_TEST_SEMC=y
diff --git a/Ubiquitous/Nuttx_Fusion_XiUOS/app_match_nuttx/apps/nshlib/nsh.h b/Ubiquitous/Nuttx_Fusion_XiUOS/app_match_nuttx/apps/nshlib/nsh.h
index df3e0f488..c899bfd6b 100644
--- a/Ubiquitous/Nuttx_Fusion_XiUOS/app_match_nuttx/apps/nshlib/nsh.h
+++ b/Ubiquitous/Nuttx_Fusion_XiUOS/app_match_nuttx/apps/nshlib/nsh.h
@@ -1458,6 +1458,10 @@ int nsh_foreach_var(FAR struct nsh_vtbl_s *vtbl, nsh_foreach_var_t cb,
   int cmd_Lcd(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
 #endif
 
+#if defined(CONFIG_USER_TEST_SEMC) && !defined(CONFIG_NSH_DISABLE_USER_TEST_SEMC)
+  int cmd_Extsram(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
+#endif
+
 #if defined(CONFIG_APPLICATION_SENSOR_HCHO_TB600B_WQ_HCHO1OS) && !defined(CONFIG_NSH_DISABLE_HCHO_TB600B_WQ_HCHO1OS)
   int cmd_Hcho1os(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv);
 #endif
diff --git a/Ubiquitous/Nuttx_Fusion_XiUOS/app_match_nuttx/apps/nshlib/nsh_Applicationscmd.c b/Ubiquitous/Nuttx_Fusion_XiUOS/app_match_nuttx/apps/nshlib/nsh_Applicationscmd.c
index ef6d6b2be..de46c9f9e 100644
--- a/Ubiquitous/Nuttx_Fusion_XiUOS/app_match_nuttx/apps/nshlib/nsh_Applicationscmd.c
+++ b/Ubiquitous/Nuttx_Fusion_XiUOS/app_match_nuttx/apps/nshlib/nsh_Applicationscmd.c
@@ -64,6 +64,19 @@ int cmd_Lcd(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
 }
 #endif
 
+/****************************************************************************
+ * Name: cmd_Extsram
+ ****************************************************************************/
+#if defined(CONFIG_USER_TEST_SEMC) && !defined(CONFIG_NSH_DISABLE_USER_TEST_SEMC)
+extern int extsram_test(void);
+int cmd_Extsram(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
+{
+    nsh_output(vtbl, "Hello, extra sdram!\n");
+    extsram_test();
+    return OK;
+}
+#endif
+
 /****************************************************************************
  * Name: cmd_Hcho1os
  ****************************************************************************/
diff --git a/Ubiquitous/Nuttx_Fusion_XiUOS/app_match_nuttx/apps/nshlib/nsh_command.c b/Ubiquitous/Nuttx_Fusion_XiUOS/app_match_nuttx/apps/nshlib/nsh_command.c
index 7f542859b..f513ecf23 100644
--- a/Ubiquitous/Nuttx_Fusion_XiUOS/app_match_nuttx/apps/nshlib/nsh_command.c
+++ b/Ubiquitous/Nuttx_Fusion_XiUOS/app_match_nuttx/apps/nshlib/nsh_command.c
@@ -604,6 +604,10 @@ static const struct cmdmap_s g_cmdmap[] =
   { "lcd",      cmd_Lcd,     1, 1, "[LCD demo cmd.]" },
 #endif
 
+#if defined(CONFIG_USER_TEST_SEMC) && !defined(CONFIG_NSH_DISABLE_USER_TEST_SEMC)
+  { "sram",      cmd_Extsram,     1, 1, "[Extra sdram demo cmd.]" },
+#endif
+
 #if defined(CONFIG_APPLICATION_SENSOR_HCHO_TB600B_WQ_HCHO1OS) && !defined(CONFIG_NSH_DISABLE_HCHO_TB600B_WQ_HCHO1OS)
   { "hcho1os",       cmd_Hcho1os,       1, 1, "[get the concentration of formaldehyde with sensor tb600b_wq_hcho1os.]" },
 #endif