update docs

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

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

@@ -11,9 +11,9 @@ The GPIO APIs define a set of standard functions for performing operations on GP
 
 - Reading and writing the pin level, which can be low or high
 
-- Setting the interrupt service routine (ISR) function and interrupt trigger mode for a pin
+- Setting an interrupt service routine (ISR) function and interrupt trigger mode for a pin
 
-- Enabling or disabling interrupts for a pin
+- Enabling or disabling pin interrupts
 
 
 ## Available APIs
@@ -37,7 +37,7 @@ The GPIO APIs define a set of standard functions for performing operations on GP
 
 The figure below shows the general GPIO development process. In the APIs, a GPIO pin is specified by the pin number.
 
-**Figure  1** Using GPIO driver APIs
+**Figure 1** Using GPIO driver APIs
 
 ![](figures/using-GPIO-process.png "using-gpio-process.png")
 
@@ -70,9 +70,7 @@ The method for determining the GPIO pin number varies depending on the GPIO cont
 - Set the GPIO pin direction.
   Before performing read/write operations on a GPIO pin, call **GpioSetDir()** to set the pin direction.
 
-  ```c
   int32_t GpioSetDir(uint16_t gpio, uint16_t dir);
-  ```
 
     **Table 2** Description of GpioSetDir
   
@@ -88,9 +86,7 @@ The method for determining the GPIO pin number varies depending on the GPIO cont
 
   Call **GpioRead()** to read the level of a GPIO pin.
 
-  ```c
-  int32_t GpioRead(uint16_t gpio, uint16_t *val);
-  ```
+  int32_t GpioRead(uint16_t gpio, uint16_t \*val);
 
     **Table 3** Description of GpioRead
   
@@ -104,10 +100,8 @@ The method for determining the GPIO pin number varies depending on the GPIO cont
 
   Call **GpioWrite()** to write the level for a GPIO pin.
 
-  ```c
   int32_t GpioWrite(uint16_t gpio, uint16_t val);
-  ``` 
- 
+
     **Table 4** Description of GpioWrite
   
   | **Parameter**| **Description**| 
@@ -120,7 +114,7 @@ The method for determining the GPIO pin number varies depending on the GPIO cont
 
   Sample code:
 
-  
+    
   ```
   int32_t ret;
   uint16_t val;
@@ -150,10 +144,8 @@ The method for determining the GPIO pin number varies depending on the GPIO cont
 
   Call **GpioSetIrq()** to set the ISR function for a GPIO pin.
 
-  ```c
-  int32_t GpioSetIrq(uint16_t gpio, uint16_t mode, GpioIrqFunc func, void *arg);
-  ``` 
- 
+  int32_t GpioSetIrq(uint16_t gpio, uint16_t mode, GpioIrqFunc func, void \*arg);
+
     **Table 5** Description of GpioSetIrq
   
   | **Parameter**| **Description**| 
@@ -171,9 +163,7 @@ The method for determining the GPIO pin number varies depending on the GPIO cont
 
   If the ISR function is no longer required, call **GpioUnsetIrq()** to cancel it.
 
-  ```c
-  int32_t GpioUnsetIrq(uint16_t gpio, void *arg);
-  ``` 
+  int32_t GpioUnsetIrq(uint16_t gpio, void \*arg);
 
     **Table 6** Description of GpioUnsetIrq
   
@@ -187,9 +177,7 @@ The method for determining the GPIO pin number varies depending on the GPIO cont
 
   After the ISR function is set, call **GpioEnableIrq()** to enable interrupts for the GPIO pin.
 
-  ```c
   int32_t GpioEnableIrq(uint16_t gpio);
-  ``` 
 
     **Table 7** Description of GpioEnableIrq
   
@@ -205,9 +193,7 @@ The method for determining the GPIO pin number varies depending on the GPIO cont
 
   You can call **GpioDisableIrq** to disable interrupts for the pin.
 
-  ```c
   int32_t GpioDisableIrq(uint16_t gpio);
-  ``` 
 
     **Table 8** Description of GpioDisableIrq
   
@@ -220,7 +206,7 @@ The method for determining the GPIO pin number varies depending on the GPIO cont
 
   Sample code:
 
-  
+    
   ```
   /* Set the ISR function. */
   int32_t MyCallBackFunc(uint16_t gpio, void *data)