diff --git a/MDK-ARM/LWIP.uvguix.29643 b/MDK-ARM/LWIP.uvguix.29643
index 7788da2..dbf2416 100644
--- a/MDK-ARM/LWIP.uvguix.29643
+++ b/MDK-ARM/LWIP.uvguix.29643
@@ -93,8 +93,8 @@
       <flags>0</flags>
       <showCmd>1</showCmd>
       <MinPosition>
-        <xPos>-32000</xPos>
-        <yPos>-32000</yPos>
+        <xPos>-1</xPos>
+        <yPos>-1</yPos>
       </MinPosition>
       <MaxPosition>
         <xPos>-1</xPos>
@@ -111,7 +111,7 @@
       <RegID>0</RegID>
       <MDITabState>
         <Len>616</Len>
-        <Data>01000000040000000100000001000000010000000100000000000000020000000000000001000000010000000000000028000000280000000100000004000000020000000100000054433A5C55736572735C32393634335C4465736B746F705C705F6C7573746572696E635F63616D6572615F666F63616C6C656E6774685F656E636F6465725F72657365745C757365727372635C636F6E6669672E630000000008636F6E6669672E6300000000BCA8E100FFFFFFFF52433A5C55736572735C32393634335C4465736B746F705C705F6C7573746572696E635F63616D6572615F666F63616C6C656E6774685F656E636F6465725F72657365745C757365727372635C7A6B65792E6800000000067A6B65792E6800000000D9ADC200FFFFFFFF55433A5C55736572735C32393634335C4465736B746F705C705F6C7573746572696E635F63616D6572615F666F63616C6C656E6774685F656E636F6465725F72657365745C757365727372635C656E636F6465722E630000000009656E636F6465722E6300000000BECEA100FFFFFFFF57433A5C55736572735C32393634335C4465736B746F705C705F6C7573746572696E635F63616D6572615F666F63616C6C656E6774685F656E636F6465725F72657365745C757365727372635C756470636C69656E742E63000000000B756470636C69656E742E6300000000F0A0A100FFFFFFFF0100000010000000C5D4F200FFDC7800BECEA100F0A0A100BCA8E1009CC1B600F7B88600D9ADC200A5C2D700B3A6BE00EAD6A300F6FA7D00B5E99D005FC3CF00C1838300CACAD500010000000000000002000000E6090000E7000000820E0000A5020000</Data>
+        <Data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ata>
       </MDITabState>
     </MDIClientArea>
     <ViewEx>
@@ -1806,7 +1806,7 @@
         <Name>File</Name>
         <Buttons>
           <Len>2537</Len>
-          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00001B000000000000000000000000000000000100000001000000000000000446696C65C6030000</Data>
+          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00001B000000000000000000000000000000000100000001000000000000000446696C65C6030000</Data>
         </Buttons>
         <OriginalItems>
           <Len>1423</Len>
@@ -1822,7 +1822,7 @@
         <Name>Build</Name>
         <Buttons>
           <Len>968</Len>
-          <Data>00200000010000001000FFFF01001100434D4643546F6F6C426172427574746F6ECF7F0000000000001C0000000000000000000000000000000001000000010000000180D07F0000000002001D000000000000000000000000000000000100000001000000018030800000000000001E000000000000000000000000000000000100000001000000FFFF01001500434D4643546F6F6C4261724D656E75427574746F6EC7040000000000006A0000000C4261746368204275696C2664000000000000000000000000010000000100000000000000000000000100000004000580C7040000000000006A0000000C4261746368204275696C266400000000000000000000000001000000010000000000000000000000010000000000058046070000000000006B0000000D42617463682052656275696C640000000000000000000000000100000001000000000000000000000001000000000005804707000000000000FFFFFFFF0B426174636820436C65616E0100000000000000000000000100000001000000000000000000000001000000000005809E8A0000000000001F0000000F4261746326682053657475702E2E2E000000000000000000000000010000000100000000000000000000000100000000000180D17F0000000004002000000000000000000000000000000000010000000100000001800000000001000000FFFFFFFF00000000000000000000000000010000000100000001804C8A0000000000002100000000000000000000000000000000010000000100000001800000000001000000FFFFFFFF000000000000000000000000000100000001000000FFFF01001900434D4643546F6F6C426172436F6D626F426F78427574746F6EBA0000000000000000000000000000000000000000000000000100000001000000960000000300205000000000044C57495096000000000000000100044C574950000000000180EB880000000000002200000000000000000000000000000000010000000100000001800000000001000000FFFFFFFF0000000000000000000000000001000000010000000180C07F000000000000230000000000000000000000000000000001000000010000000180B08A000000000400240000000000000000000000000000000001000000010000000180A8010000000000004E00000000000000000000000000000000010000000100000001807202000000000000530000000000000000000000000000000001000000010000000180BE010000000000005000000000000000000000000000000000010000000100000000000000054275696C64DC010000</Data>
+          <Data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ata>
         </Buttons>
         <OriginalItems>
           <Len>583</Len>
@@ -1838,7 +1838,7 @@
         <Name>Debug</Name>
         <Buttons>
           <Len>2373</Len>
-          <Data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ata>
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         </Buttons>
         <OriginalItems>
           <Len>898</Len>
diff --git a/usersrc/atcmd.c b/usersrc/atcmd.c
index 5a870e3..2894b3f 100644
--- a/usersrc/atcmd.c
+++ b/usersrc/atcmd.c
@@ -25,7 +25,7 @@ extern ETH_HandleTypeDef heth;
             ip_address[len] = 0; /* 这个必须要加，否则转换会出错 */ \
             inet_aton(ip_address, &int_addr);                                     \
             _config_get = int_addr.addr;                                          \
-            config_dump_config();                                                 \
+            config_flash_write();                                                 \
             printf("AT+OK\r\n");                                                  \
         }                                                                         \
         return AT_SUCCESS;                                                        \
@@ -119,7 +119,7 @@ AT_STATUS at_cmd_obtaining_ip_mode(unsigned char *p, unsigned char len)
             return AT_ERR;
         }
         config_get()->obtaining_ip_mode = *p - 48; /* ascii码字符0十进制为48 */
-        config_dump_config();
+        config_flash_write();
         printf("AT+OK\r\n");
     }
     return AT_SUCCESS;
diff --git a/usersrc/config.c b/usersrc/config.c
index a29e63d..4830f47 100644
--- a/usersrc/config.c
+++ b/usersrc/config.c
@@ -22,30 +22,35 @@
   config_flash_write_start_address += 4;
 
 #define CONFIG_SIZE ((sizeof(config_t) / 4) + ((sizeof(config_t) % 4) > 0 ? 1 : 0))
+#define COINFIG_WRITED_FLAG 0X88888888
 
 static config_t s_config;
 static bool s_is_first_init = false;
 
 void config_init(void)
 {
-  IP4_ADDR((ip4_addr_t *)&s_config.ip, 192, 168, 8, 10);
-  IP4_ADDR((ip4_addr_t *)&s_config.gw, 192, 168, 8, 1);
-  IP4_ADDR((ip4_addr_t *)&s_config.netmask, 255, 255, 255, 0);
-  s_config.localport = SERVICE_PORT;
-  s_config.obtaining_ip_mode = OBTAINING_IP_MODE_DHCP; // dhcp
-  s_config.mask = 1;                                   //
-
-  if (config_flash_write() < 0)
-  {
-    printf("flash write config error\r\n");
-  }
-  else
+  config_flash_read();
+
+  if (s_config.config_writed_flag != COINFIG_WRITED_FLAG)
   {
-    printf("flash write config success\r\n");
+    IP4_ADDR((ip4_addr_t *)&s_config.ip, 192, 168, 8, 10);
+    IP4_ADDR((ip4_addr_t *)&s_config.gw, 192, 168, 8, 1);
+    IP4_ADDR((ip4_addr_t *)&s_config.netmask, 255, 255, 255, 0);
+    s_config.localport = SERVICE_PORT;
+    s_config.obtaining_ip_mode = OBTAINING_IP_MODE_DHCP; // dhcp
+    s_config.mask = 1;                                   //
+    s_config.config_writed_flag = COINFIG_WRITED_FLAG;
+
+    if (config_flash_write() < 0)
+    {
+      printf("flash write config error\r\n");
+    }
+    else
+    {
+      printf("flash write config success\r\n");
+    }
   }
 
-  config_flash_read();
-
   /*dumpconfig*/
   config_dump_config();
 }
@@ -72,6 +77,7 @@ void config_flash_read(void)
   FLASH_READ(s_config.gw);
   FLASH_READ(s_config.netmask);
   FLASH_READ(s_config.localport);
+  FLASH_READ(s_config.config_writed_flag);
 }
 
 config_t *config_get(void) { return &s_config; }
@@ -93,6 +99,7 @@ int8_t config_flash_write(void)
   FLASH_WRITE(s_config.gw);
   FLASH_WRITE(s_config.netmask);
   FLASH_WRITE(s_config.localport);
+  FLASH_WRITE(s_config.config_writed_flag);
 
   return 0;
 }
diff --git a/usersrc/config.h b/usersrc/config.h
index 2bc8957..e3d7389 100644
--- a/usersrc/config.h
+++ b/usersrc/config.h
@@ -16,6 +16,8 @@ typedef struct
   uint32_t netmask;
   uint32_t localport;
 
+  uint32_t config_writed_flag;
+
   // uint32_t
 } config_t;