add the comment of irq.c

Author: supperthomas

src/irq.c

@@ -9,6 +9,7 @@
  * 2006-05-03     Bernard      add IRQ_DEBUG
  * 2016-08-09     ArdaFu       add interrupt enter and leave hook.
  * 2018-11-22     Jesven       rt_interrupt_get_nest function add disable irq
+ * 2021-08-15     Supperthomas fix the comment
  */
 
 #include <rthw.h>
@@ -21,19 +22,26 @@ static void (*rt_interrupt_leave_hook)(void);
 
 /**
  * @ingroup Hook
- * This function set a hook function when the system enter a interrupt
- *
+ * 
+ * @brief This function set a hook function when the system enter a interrupt
+ * 
  * @note the hook function must be simple and never be blocked or suspend.
+ * 
+ * @param hook The function point to be called
  */
 void rt_interrupt_enter_sethook(void (*hook)(void))
 {
     rt_interrupt_enter_hook = hook;
 }
+
 /**
  * @ingroup Hook
- * This function set a hook function when the system exit a interrupt.
- *
+ * 
+ * @brief This function set a hook function when the system exit a interrupt.
+ * 
  * @note the hook function must be simple and never be blocked or suspend.
+ * 
+ * @param hook The function point to be called
  */
 void rt_interrupt_leave_sethook(void (*hook)(void))
 {
@@ -53,11 +61,12 @@ void rt_interrupt_leave_sethook(void (*hook)(void))
 volatile rt_uint8_t rt_interrupt_nest = 0;
 #endif /* RT_USING_SMP */
 
+
 /**
- * This function will be invoked by BSP, when enter interrupt service routine
- *
+ * @brief This function will be invoked by BSP, when enter interrupt service routine
+ * 
  * @note please don't invoke this routine in application
- *
+ * 
  * @see rt_interrupt_leave
  */
 void rt_interrupt_enter(void)
@@ -74,11 +83,12 @@ void rt_interrupt_enter(void)
 }
 RTM_EXPORT(rt_interrupt_enter);
 
+
 /**
- * This function will be invoked by BSP, when leave interrupt service routine
- *
+ * @brief This function will be invoked by BSP, when leave interrupt service routine
+ * 
  * @note please don't invoke this routine in application
- *
+ * 
  * @see rt_interrupt_enter
  */
 void rt_interrupt_leave(void)
@@ -95,13 +105,14 @@ void rt_interrupt_leave(void)
 }
 RTM_EXPORT(rt_interrupt_leave);
 
+
 /**
- * This function will return the nest of interrupt.
- *
+ * @brief This function will return the nest of interrupt.
+ * 
  * User application can invoke this function to get whether current
  * context is interrupt context.
- *
- * @return the number of nested interrupts.
+ * 
+ * @return rt_uint8_t  the number of nested interrupts.
  */
 RT_WEAK rt_uint8_t rt_interrupt_get_nest(void)
 {