diff --git a/MDK-ARM/LWIP.uvguix.29643 b/MDK-ARM/LWIP.uvguix.29643
index 9dff482..db263b4 100644
--- a/MDK-ARM/LWIP.uvguix.29643
+++ b/MDK-ARM/LWIP.uvguix.29643
@@ -1838,7 +1838,7 @@
         <Name>Debug</Name>
         <Buttons>
           <Len>2373</Len>
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         </Buttons>
         <OriginalItems>
           <Len>898</Len>
@@ -1902,8 +1902,8 @@
       <Doc>
         <Name>..\usersrc\config.c</Name>
         <ColumnNumber>1</ColumnNumber>
-        <TopLine>36</TopLine>
-        <CurrentLine>59</CurrentLine>
+        <TopLine>31</TopLine>
+        <CurrentLine>48</CurrentLine>
         <Folding>1</Folding>
         <ContractedFolders></ContractedFolders>
         <PaneID>0</PaneID>
diff --git a/usersrc/config.c b/usersrc/config.c
index e9866b9..14d4d11 100644
--- a/usersrc/config.c
+++ b/usersrc/config.c
@@ -25,10 +25,15 @@ void config_init(void)
   s_config.mask = 1;                                   //
 
 #endif
-  // if (stmflash_write(FLASH_START_ADDRESS, (uint32_t *)&s_config, CONFIG_SIZE) < 0)
-  // {
-  //   printf("flash write config error\r\n");
-  // }
+
+  if (config_flash_write() < 0)
+  {
+    printf("flash write config error\r\n");
+  }
+  else
+  {
+    printf("flash write config success\r\n");
+  }
 
   // config_flash_read();
 
@@ -65,3 +70,58 @@ void config_flash_read(void)
 }
 
 config_t *config_get(void) { return &s_config; }
+
+int8_t config_flash_write(void)
+{
+  HAL_StatusTypeDef status;
+  uint32_t config_flash_write_start_address = FLASH_START_ADDRESS;
+  status = FlashErase();
+  if (status != HAL_OK)
+  {
+    printf("flash erase error, status:%d\r\n", status);
+    return -1;
+  }
+
+  status = FlashWrite(config_flash_write_start_address + 0, s_config.mask);
+  if (status != HAL_OK)
+  {
+    printf("flash write error, status:%d\r\n", status);
+    return -2;
+  }
+
+  status = FlashWrite(config_flash_write_start_address + 4, s_config.obtaining_ip_mode);
+  if (status != HAL_OK)
+  {
+    printf("flash write error, status:%d\r\n", status);
+    return -3;
+  }
+
+  status = FlashWrite(config_flash_write_start_address + 8, s_config.ip);
+  if (status != HAL_OK)
+  {
+    printf("flash write error, status:%d\r\n", status);
+    return -4;
+  }
+
+  status = FlashWrite(config_flash_write_start_address + 12, s_config.gw);
+  if (status != HAL_OK)
+  {
+    printf("flash write error, status:%d\r\n", status);
+    return -5;
+  }
+
+  status = FlashWrite(config_flash_write_start_address + 16, s_config.netmask);
+  if (status != HAL_OK)
+  {
+    printf("flash write error, status:%d\r\n", status);
+    return -6;
+  }
+
+  status = FlashWrite(config_flash_write_start_address + 20, s_config.localport);
+  if (status != HAL_OK)
+  {
+    printf("flash write error, status:%d\r\n", status);
+    return -7;
+  }
+  return 0;
+}
diff --git a/usersrc/config.h b/usersrc/config.h
index 415a428..e537571 100644
--- a/usersrc/config.h
+++ b/usersrc/config.h
@@ -25,3 +25,4 @@ void config_dump_config(void);
 config_t *config_get(void);
 bool config_is_first_init(void);
 void config_flash_read(void);
+int8_t config_flash_write(void);