update docs

Signed-off-by: Nannie_wangli <annie.wangli@huawei.com>

en/device-dev/driver/driver-peripherals.md

-# Peripherals<a name="EN-US_TOPIC_0000001157319411"></a>
+# Peripheral Driver Development<a name="EN-US_TOPIC_0000001157319411"></a>
 
 -   **[LCD](driver-peripherals-lcd-des.md)**  
 

en/device-dev/driver/driver-platform-watchdog-des.md

@@ -104,7 +104,7 @@ A watchdog, also called a watchdog timer, is a hardware timing device. If an err
 
 Use  **WatchdogOpen**  to open a watchdog. A system may have multiple watchdogs. You can open the specified watchdog by using the ID.
 
-int32\_t WatchdogOpen\(int16\_t wdtId\); 
+DevHandle WatchdogOpen\(int16\_t wdtId\);
 
 **Table  2**  Description of WatchdogOpen
 
@@ -201,7 +201,7 @@ if (ret != 0) {
 
 ### Setting the Timeout Duration<a name="section182386137111"></a>
 
-int32\_t WatchdogSetTimeout\(PalHandle \*handle, uint32\_t seconds\); 
+int32\_t WatchdogSetTimeout\(DevHandle \*handle, uint32\_t seconds\); 
 
 **Table  4**  Description of WatchdogSetTimeout
 
@@ -253,7 +253,7 @@ if (ret != 0) {
 
 ### Obtaining the Timeout Duration<a name="section1883310371114"></a>
 
-int32\_t WatchdogGetTimeout\(PalHandle \*handle, uint32\_t \*seconds\); 
+int32\_t WatchdogGetTimeout\(DevHandle \*handle, uint32\_t \*seconds\);
 
 **Table  5**  Description of WatchdogGetTimeout
 

en/device-dev/kernel/kernel-mini-appx-lib-posix.md

@@ -250,7 +250,8 @@ The OpenHarmony kernel uses the  **musl libc**  library and self-developed APIs
 <td class="cellrowborder" valign="top" headers="mcps1.2.5.1.3 "><p id="p5747174219504"><a name="p5747174219504"></a><a name="p5747174219504"></a>Deletes a file.</p>
 </td>
 </tr>
-<tr id="row117941848155011"><td class="cellrowborder" valign="top" headers="mcps1.2.5.1.1 "><p id="p157951148105019"><a name="p157951148105019"></a><a name="p157951148105019"></a>#include &lt;fcntl.h</p>
+<tr id="row117941848155011"><td class="cellrowborder" valign="top" headers="mcps1.2.5.1.1 "><p id="p157951148105019"><a
+name="p157951148105019"></a><a name="p157951148105019"></a>#include &lt;fcntl.h&gt;</p>
 </td>
 <td class="cellrowborder" valign="top" headers="mcps1.2.5.1.2 "><p id="p1086884114190"><a name="p1086884114190"></a><a name="p1086884114190"></a>int open(const char *path, int oflags, ...);</p>
 </td>