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目前,网络机顶盒的市场越来越大,现有的产品功能比较繁杂,为实现功能的可定制化,增强用户与机顶盒间的交互能力,文章中的设计在基于Android系统和Cortex-A7架构主控的网络机顶盒基础上加入了USB-OTG模块。文章介绍了USB子系统的整体框架,并对设备端驱动和主从切换部分等关键技术做了详细描述,最后实验验证了此方案的可行性。
At present, the market for network set-top boxes is getting bigger and bigger, and the existing product functions are complicated. In order to realize the customization of functions and enhance the interaction between users and set-top boxes, the design of the article is based on Android system and Cortex-A7 architecture master Controlled network set-top box based on the added USB-OTG module. The article introduces the overall framework of the USB subsystem, and describes the key technologies such as the device driver and the master-slave switching part. Finally, the feasibility of this scheme is verified experimentally.