diff --git a/rtos/code/driver/na51089/include/sf_mcu.h b/rtos/code/driver/na51089/include/sf_mcu.h
index 3af70a914..6d93014ef 100755
--- a/rtos/code/driver/na51089/include/sf_mcu.h
+++ b/rtos/code/driver/na51089/include/sf_mcu.h
@@ -494,7 +494,8 @@ UINT16 sf_mcu_get_irshtter(void);
 
 BOOL sf_is_card_full(void);
 UINT32 sf_check_card_full(void);
-
+BOOL sf_is_emmc_full(void);
+UINT32 sf_check_emmc_full(void);
 typedef BOOL (*SF_CALLBACK_SD_CMD)(void);
 
 void sf_sd_exist_reg_cb(SF_CALLBACK_SD_CMD fpCB);
diff --git a/rtos/code/driver/na51089/source/mcu/sf_sd_common.c b/rtos/code/driver/na51089/source/mcu/sf_sd_common.c
index 79d703e9b..d264d48a8 100755
--- a/rtos/code/driver/na51089/source/mcu/sf_sd_common.c
+++ b/rtos/code/driver/na51089/source/mcu/sf_sd_common.c
@@ -48,6 +48,7 @@
 static BOOL IsCardFull = FALSE;
 SF_CALLBACK_SD_CMD g_fpSd_Exist_CB = NULL;
 extern BOOL DrvCARD_DetStrgCard(void);
+static BOOL IsEmmcFull = FALSE;
 
 SF_RTOS_ST_MMC_DEV *sf_rtos_mmc_dev[MMC_DEV_MAX_NUM] = {NULL};
 
@@ -92,6 +93,40 @@ UINT32 sf_check_card_full(void)
     return ret;
 }
 
+BOOL sf_is_emmc_full(void)
+{
+	//printf("[%s]:%d IsCardFull:%d\n", __FUNCTION__, __LINE__, IsCardFull);
+	return IsEmmcFull;
+}
+
+UINT32 sf_check_emmc_full(void)
+{
+    UINT64 diskFree = 0;
+    UINT32 ret = 0;
+        
+    /*check disk free size*/
+    diskFree = FileSys_GetDiskInfoEx('B', FST_INFO_FREE_SPACE);
+    diskFree = diskFree/1024/1024;
+    
+    if(diskFree < 30) /* 30MB */
+    {
+            ret = TRUE;
+            //if(0 == puiPara->SdLoopSwitch)
+            {
+                    IsCardFull = TRUE;
+            }
+            //printf("%s:%d sd card is full diskFree=%lu",__FUNCTION__,__LINE__,diskFree);
+    }
+    else
+    {
+            ret = FALSE;
+            //printf("%s:%d sd card no full diskFree=%lu",__FUNCTION__,__LINE__,diskFree);
+    }
+
+    printf("[%s:%d]emmc diskFree=%lluM\n", __FUNCTION__, __LINE__, diskFree);
+
+    return ret;
+}
 
 void sf_sd_exist_reg_cb(SF_CALLBACK_SD_CMD fpCB)
 {