diff --git a/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/TencentOS_tiny.uvoptx b/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/TencentOS_tiny.uvoptx
index bdfb1782..7ce8cd66 100644
--- a/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/TencentOS_tiny.uvoptx
+++ b/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/TencentOS_tiny.uvoptx
@@ -699,7 +699,7 @@
 
   <Group>
     <GroupName>Drivers/CMSIS</GroupName>
-    <tvExp>0</tvExp>
+    <tvExp>1</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
diff --git a/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/TencentOS_tiny.uvprojx b/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/TencentOS_tiny.uvprojx
index 294fdafd..4a23b42a 100644
--- a/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/TencentOS_tiny.uvprojx
+++ b/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/TencentOS_tiny.uvprojx
@@ -10,14 +10,14 @@
       <TargetName>TencentOS_tiny</TargetName>
       <ToolsetNumber>0x4</ToolsetNumber>
       <ToolsetName>ARM-ADS</ToolsetName>
-      <pCCUsed>5060750::V5.06 update 6 (build 750)::ARMCC</pCCUsed>
+      <pCCUsed>5060750::V5.06 update 6 (build 750)::.\ARMCC</pCCUsed>
       <uAC6>0</uAC6>
       <TargetOption>
         <TargetCommonOption>
           <Device>STM32L431RCTx</Device>
           <Vendor>STMicroelectronics</Vendor>
-          <PackID>Keil.STM32L4xx_DFP.2.0.0</PackID>
-          <PackURL>http://www.keil.com/pack</PackURL>
+          <PackID>Keil.STM32L4xx_DFP.2.4.0</PackID>
+          <PackURL>https://www.keil.com/pack/</PackURL>
           <Cpu>IRAM(0x20000000-0x2000FFFF) IROM(0x8000000-0x803FFFF) CLOCK(8000000) FPU2 CPUTYPE("Cortex-M4")</Cpu>
           <FlashUtilSpec></FlashUtilSpec>
           <StartupFile></StartupFile>
@@ -185,6 +185,7 @@
             <uocXRam>0</uocXRam>
             <RvdsVP>2</RvdsVP>
             <RvdsMve>0</RvdsMve>
+            <RvdsCdeCp>0</RvdsCdeCp>
             <hadIRAM2>0</hadIRAM2>
             <hadIROM2>0</hadIROM2>
             <StupSel>8</StupSel>
@@ -338,7 +339,7 @@
               <MiscControls></MiscControls>
               <Define>USE_HAL_DRIVER,STM32L431xx,</Define>
               <Undefine></Undefine>
-              <IncludePath>..\..\..\BSP\Inc;..\..\..\..\..\platform\vendor_bsp\st\STM32L4xx_HAL_Driver\Inc;..\..\..\..\..\platform\vendor_bsp\st\STM32L4xx_HAL_Driver\Legacy;..\..\..\..\..\platform\vendor_bsp\st\CMSIS\Device\ST\STM32L4xx\Include;..\..\..\..\..\platform\vendor_bsp\st\CMSIS\Include;..\..\..\..\..\kernel\core\include;..\..\..\TOS-CONFIG;..\..\..\..\..\platform\arch\arm\cortex-m4\keil;..\..\..\..\..\kernel\pm\include;..\..\..\..\..\osal\cmsis_os;..\..\..\..\..\arch\arm\arm-v7m\common\include;..\..\..\..\..\arch\arm\arm-v7m\cortex-m4\armcc;..\..\..\BSP\Hardware\DHT11;..\..\..\BSP\Hardware\OLED;..\..\..\BSP\Hardware\BH1750;..\..\..\..\..\devices\esp8266;..\..\..\..\..\net\at\include;..\..\..\..\..\kernel\hal\include;..\..\..\..\..\net\sal_module_wrapper;..\..\..\..\..\components\ota\download\include;..\..\..\..\..\components\ota\common\crc;..\..\..\..\..\components\ota\common\image;..\..\..\..\..\components\ota\common\flash;..\..\..\..\..\components\ota\common\partition;..\..\..\..\..\components\ota\common\env;..\..\..\..\..\components\fs\kv\include;..\..\..\..\..\components\ota\common\info</IncludePath>
+              <IncludePath>..\..\..\BSP\Inc;..\..\..\..\..\platform\vendor_bsp\st\STM32L4xx_HAL_Driver\Inc;..\..\..\..\..\platform\vendor_bsp\st\STM32L4xx_HAL_Driver\Legacy;..\..\..\..\..\platform\vendor_bsp\st\CMSIS\Device\ST\STM32L4xx\Include;..\..\..\..\..\platform\vendor_bsp\st\CMSIS\Include;..\..\..\..\..\kernel\core\include;..\..\..\TOS-CONFIG;..\..\..\..\..\platform\arch\arm\cortex-m4\keil;..\..\..\..\..\kernel\pm\include;..\..\..\..\..\osal\cmsis_os;..\..\..\..\..\arch\arm\arm-v7m\common\include;..\..\..\..\..\arch\arm\arm-v7m\cortex-m4\armcc;..\..\..\BSP\Hardware\DHT11;..\..\..\BSP\Hardware\OLED;..\..\..\BSP\Hardware\BH1750;..\..\..\..\..\devices\esp8266;..\..\..\..\..\net\at\include;..\..\..\..\..\kernel\hal\include;..\..\..\..\..\net\sal_module_wrapper;..\..\..\..\..\components\ota\download\include;..\..\..\..\..\components\ota\common\crc;..\..\..\..\..\components\ota\common\image;..\..\..\..\..\components\ota\common\flash;..\..\..\..\..\components\ota\common\partition;..\..\..\..\..\components\ota\common\env;..\..\..\..\..\components\fs\kv\include;..\..\..\..\..\components\ota\common\info;..\..\..\..\..\components\ota\recovery\include</IncludePath>
             </VariousControls>
           </Cads>
           <Aads>
@@ -351,7 +352,7 @@
             <NoWarn>0</NoWarn>
             <uSurpInc>0</uSurpInc>
             <useXO>0</useXO>
-            <uClangAs>0</uClangAs>
+            <ClangAsOpt>4</ClangAsOpt>
             <VariousControls>
               <MiscControls></MiscControls>
               <Define></Define>
@@ -919,4 +920,19 @@
     <files/>
   </RTE>
 
+  <LayerInfo>
+    <Layers>
+      <Layer>
+        <LayName>&lt;Project Info&gt;</LayName>
+        <LayDesc></LayDesc>
+        <LayUrl></LayUrl>
+        <LayKeys></LayKeys>
+        <LayCat></LayCat>
+        <LayLic></LayLic>
+        <LayTarg>0</LayTarg>
+        <LayPrjMark>1</LayPrjMark>
+      </Layer>
+    </Layers>
+  </LayerInfo>
+
 </Project>
diff --git a/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/system_stm32l4xx.c b/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/system_stm32l4xx.c
index 70e973e9..d748f570 100644
--- a/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/system_stm32l4xx.c
+++ b/board/TencentOS_tiny_EVB_MX_Plus/KEIL/ota/ota_application_download_through_http/system_stm32l4xx.c
@@ -123,7 +123,7 @@
 /*!< Uncomment the following line if you need to relocate your vector Table in
      Internal SRAM. */
 /* #define VECT_TAB_SRAM */
-#define VECT_TAB_OFFSET  0x8000 /*!< Vector Table base offset field.
+#define VECT_TAB_OFFSET  0x7800 /*!< Vector Table base offset field.
                                    This value must be a multiple of 0x200. */
 /******************************************************************************/
 /**
diff --git a/examples/ota_download_through_http/ota_download_through_http_sample.c b/examples/ota_download_through_http/ota_download_through_http_sample.c
index 094b24b3..4bbe2cb2 100644
--- a/examples/ota_download_through_http/ota_download_through_http_sample.c
+++ b/examples/ota_download_through_http/ota_download_through_http_sample.c
@@ -3,7 +3,7 @@
 #include "sal_module_wrapper.h"
 #include "cmsis_os.h"
 
-#include "tos_ota_download.h"
+#include "ota_download.h"
 
 extern ota_flash_drv_t stm32l4_norflash_onchip_drv_ota;
 extern ota_flash_prop_t stm32l4_norflash_onchip_prop_ota;
@@ -43,12 +43,12 @@ void ota_download_task(void *arg)
 
     uint32_t partition_addr = 0x08024800;
 
-    if (tos_ota_env_init(OTA_UPDATE_IN_POSITION, partition_addr, &stm32l4_norflash_onchip_drv_ota, &stm32l4_norflash_onchip_prop_ota) < 0) {
+    if (ota_env_init(OTA_UPDATE_IN_POSITION, partition_addr, &stm32l4_norflash_onchip_drv_ota, &stm32l4_norflash_onchip_prop_ota) < 0) {
         printf("env init failed!\n");
         return;
     }
 
-    if (!tos_ota_download_http("http://39.108.190.129:8000/patch.bin")) {
+    if (!ota_download_http("http://39.108.190.129:8000/patch.bin")) {
         printf("download successfully!\n");
     } else {
         printf("download failed!\n");