通过WIFI传输至少200MB的媒体文件（视频或图片），其中视频文件无音频数据。
当前考虑走SDIO（2.0）接入外部高速WIFI模块，是否可行？考虑从外部wifi模组传输，由于当前系统中RAM不支持缓存整个媒体文件，所以考虑分段传输，分段写入FLASH，该操作是否会影响传输速率？能否评估该传输该文件的速率？且本地的WIFI协议栈可以通过何种方式实现？
Transfer at least 200MB of media files (video or pictures) over WIFI, where video files have no audio data.
Is it feasible to use SDIO (2.0) to access the external high-speed WIFI module? Consider transferring from an external wifi module. Since RAM in the current system does not support caching of the entire media file, consider segmented transmission and segmented writing to FLASH. Will this operation affect the transmission rate? Can you estimate the rate at which the file is transferred? And how can the local WIFI protocol stack be implemented?
