配置 doxygen

定义自己的宏 HAL_CONFIG_USB

代码中判断宏

@if HAL_CONFIG_USB
your contents
@endif

需要注意的是 Doxygen不支持直接的 @elif 指令。Doxygen只提供了 @if 和 @endif 指令来实现条件性文档生成。如果您需要多个条件进行判断，可以使用多个 @if 指令来实现，例如：

/**
 * @file example.h
 * @brief This is an example header file.
 */
#ifndef EXAMPLE_H
#define EXAMPLE_H
 /**
 * @brief This is a function that gets documented based on multiple conditions.
 *
 * @param[in] condition The condition to be checked.
 *
 * @if (HAL_CONFIG_USB)
 * This block is documented if condition is HAL_CONFIG_USB.
 * @endif
 *
 * @if (HAL_CONFIG_USBH)
 * This block is documented if condition is HAL_CONFIG_USBH.
 * @endif
 *
 * @if (HAL_CONFIG_USBD)
 * This block is documented if condition is HAL_CONFIG_USBD.
 * @endif
 */
void conditionalFunction(int condition);
 #endif // EXAMPLE_H

请确保每个 @if 都有对应的 @endif 来正确关闭条件块