diff --git a/bsp/stm32/libraries/HAL_Drivers/drv_flash/drv_flash_f1.c b/bsp/stm32/libraries/HAL_Drivers/drv_flash/drv_flash_f1.c
index 5511c84a0e82ef1e5d5360843b6395bad5273fe5..3a385907b4fbf6d6ce8f3809da11dfbaa7267c43 100644
--- a/bsp/stm32/libraries/HAL_Drivers/drv_flash/drv_flash_f1.c
+++ b/bsp/stm32/libraries/HAL_Drivers/drv_flash/drv_flash_f1.c
@@ -186,72 +186,72 @@ __exit:
  */
 int stm32_flash_erase(rt_uint32_t addr, size_t size)
 {
-	 rt_err_t result = RT_EOK;
+    rt_err_t result = RT_EOK;
 	
 #if defined(FLASH_BANK2_END)		
-	uint32_t addr_bank1 = 0;
-	uint32_t size_bank1 = 0;
-	uint32_t addr_bank2 = 0;
-	uint32_t size_bank2 = 0;
-	uint8_t  bank1_flag = 0;
-	uint8_t  bank2_flag = 0;
+    uint32_t addr_bank1 = 0;
+    uint32_t size_bank1 = 0;
+    uint32_t addr_bank2 = 0;
+    uint32_t size_bank2 = 0;
+    uint8_t  bank1_flag = 0;
+    uint8_t  bank2_flag = 0;
 #endif
     
 #if defined(FLASH_BANK2_END)	
 	
-	if(addr <= FLASH_BANK1_END)
-	{
-		addr_bank1 = addr;
-		bank1_flag = 1;
-		
-		if((addr + size) > FLASH_BANK1_END)
-		{
-			addr_bank2 = FLASH_BANK1_END + 1;
-			size_bank2 = addr + size - (FLASH_BANK1_END + 1);
-			
-			if(size_bank2)
-			{
-				bank2_flag = 1;
-			}
-			
-			size_bank1 = FLASH_BANK1_END + 1 - addr_bank1;
-		}
-		else
-		{
-			size_bank1 = size;
-		}
-	}
-	else
-	{
-		addr_bank2 = addr;
-		size_bank2 = size;
-		bank1_flag = 0;
-		bank2_flag = 1;
-	}
-	
-	if(bank1_flag)
-	{
-		log_d("bank1: addr (0x%p), size %d", (void *)addr_bank1, size_bank1);
-		
-		if(size_bank1 != stm32_flash_erase_bank(FLASH_BANK_1, addr_bank1, size_bank1))
-		{
-			result = -RT_ERROR;
-		}
-	}
-	
-	if(bank2_flag)
-	{
-		log_d("bank2: addr (0x%p), size %d", (void *)addr_bank2, size_bank2);
-		
-		if(size_bank2 != stm32_flash_erase_bank(FLASH_BANK_2, addr_bank2, size_bank2))
-		{
-			result = -RT_ERROR;
-		}
-	}
-
-	return result;
+    if(addr <= FLASH_BANK1_END)
+    {
+        addr_bank1 = addr;
+        bank1_flag = 1;
+          
+        if((addr + size) > FLASH_BANK1_END)
+        {
+            addr_bank2 = FLASH_BANK1_END + 1;
+            size_bank2 = addr + size - (FLASH_BANK1_END + 1);
+          
+            if(size_bank2)
+            {
+                bank2_flag = 1;
+            }
+          
+                size_bank1 = FLASH_BANK1_END + 1 - addr_bank1;
+        }
+        else
+        {
+            size_bank1 = size;
+        }
+    }
+    else
+    {
+    	addr_bank2 = addr;
+    	size_bank2 = size;
+    	bank1_flag = 0;
+    	bank2_flag = 1;
+    }
+    
+    if(bank1_flag)
+    {
+    	log_d("bank1: addr (0x%p), size %d", (void *)addr_bank1, size_bank1);
+    
+    	if(size_bank1 != stm32_flash_erase_bank(FLASH_BANK_1, addr_bank1, size_bank1))
+    	{
+            result = -RT_ERROR;
+    	}
+    }
+    
+    if(bank2_flag)
+    {
+    	log_d("bank2: addr (0x%p), size %d", (void *)addr_bank2, size_bank2);
+    
+    	if(size_bank2 != stm32_flash_erase_bank(FLASH_BANK_2, addr_bank2, size_bank2))
+    	{
+            result = -RT_ERROR;
+    	}
+    }
+    
+return result;
 #else
-	return stm32_flash_erase_bank(FLASH_BANK_1, addr, size);
+    return stm32_flash_erase_bank(FLASH_BANK_1, addr, size);
 #endif
 }