[HUST CSE][document] Fix some comments, invalid grouping commands and warnings in Doxygen.

将Doxygen输入文件（由Doxyfile中的INPUT定义）中的失效Doxygen分组指令（如/*@*/和/*@}*/）更改为有效的分组指令（如/**@*/和/**@}*/）；（此处只对INPUT中的文件做了修改，bsp目录下和libcpu目录下存在近万个失效的Doxygen分组指令，但由于不作为文档的输入文件且这些文件过于庞大老旧，没有对这些文件中的无效指令做修改）
将图片文件统一放入了images目录下；
修改了Doxyfile和部分Doxygen注释，使得Doxyfile能够定位到新的代码路径且不受重复实现的影响；
解决了一些注释中的参数名不匹配、参数多余/缺失等问题。

1 files changed, 4 insertions, 0 deletions

diff --git a/src/cpu.c b/src/cpu.c
index a89a0cca6a..8108d28da4 100644
--- a/src/cpu.c
+++ b/src/cpu.c
@@ -178,6 +178,8 @@ struct rt_cpu *rt_cpu_self(void)
 /**
  * @brief   This fucntion will return the cpu object corresponding to index.
  *
+ * @param   index is the index of target cpu object.
+ *
  * @return  Return a pointer to the cpu object corresponding to index.
  */
 struct rt_cpu *rt_cpu_index(int index)
@@ -242,6 +244,8 @@ RTM_EXPORT(rt_cpus_unlock);
  * This function is invoked by scheduler.
  * It will restore the lock state to whatever the thread's counter expects.
  * If target thread not locked the cpus then unlock the cpus lock.
+ *
+ * @param   thread is a pointer to the target thread.
  */
 void rt_cpus_lock_status_restore(struct rt_thread *thread)
 {