[doxygen] Fix some warnings in doxygen (#6899)

2 files changed, 10 insertions, 15 deletions

diff --git a/include/rtdef.h b/include/rtdef.h
index ffafa5db1d..31341759bf 100644
--- a/include/rtdef.h
+++ b/include/rtdef.h
@@ -570,6 +570,8 @@ typedef struct rt_timer *rt_timer_t;
 /**
  * @addtogroup Signal
  */
+/**@{*/
+
 #ifdef RT_USING_SIGNALS
 #include <sys/signal.h>
 typedef unsigned long rt_sigset_t;
diff --git a/include/rtthread.h b/include/rtthread.h
index b5203015ee..7538a3c032 100644
--- a/include/rtthread.h
+++ b/include/rtthread.h
@@ -37,10 +37,9 @@ extern "C" {
 
 /**
  * @addtogroup KernelObject
+ * @{
  */
 
-/**@{*/
-
 /*
  * kernel object interface
  */
@@ -80,10 +79,9 @@ void rt_object_put_sethook(void (*hook)(struct rt_object *object));
 
 /**
  * @addtogroup Clock
+ * @{
  */
 
-/**@{*/
-
 /*
  * clock & timer interface
  */
@@ -130,10 +128,9 @@ void rt_timer_exit_sethook(void (*hook)(struct rt_timer *timer));
 
 /**
  * @addtogroup Thread
+ * @{
  */
 
-/**@{*/
-
 /*
  * thread interface
  */
@@ -232,14 +229,13 @@ int rt_signal_wait(const rt_sigset_t *set, rt_siginfo_t *si, rt_int32_t timeout)
 
 int rt_system_signal_init(void);
 #endif
-/*@}*/
+/**@}*/
 
 /**
  * @addtogroup MM
+ * @{
  */
 
-/**@{*/
-
 /*
  * memory management interface
  */
@@ -347,10 +343,9 @@ void rt_slab_free(rt_slab_t m, void *ptr);
 
 /**
  * @addtogroup IPC
+ * @{
  */
 
-/**@{*/
-
 #ifdef RT_USING_SEMAPHORE
 /*
  * semaphore interface
@@ -537,10 +532,9 @@ void rt_spin_unlock_irqrestore(struct rt_spinlock *lock, rt_base_t level);
 #ifdef RT_USING_DEVICE
 /**
  * @addtogroup Device
+ * @{
  */
 
-/**@{*/
-
 /*
  * device (I/O) system interface
  */
@@ -627,10 +621,9 @@ void rt_components_board_init(void);
 
 /**
  * @addtogroup KernelService
+ * @{
  */
 
-/**@{*/
-
 /*
  * general kernel service
  */