As a software layer between embedded operation system and hardware in embedded system, HAL (hardware Abstraction layer) is a key problem of embedded application.
在嵌入式系统中，硬件抽象层作为嵌入式操作系统和硬件之间的软件层次是嵌入式应用的一个关键问题。
The system has four layers, including application layer, data operation layer, data wrapping layer, and data source layer.
此原型分为四层，分别为应用层、数据操作层、数据包装层、数据源系统层。
Based on embedded operation system, the high layer protocol model and its implementation in MIMO wireless communication system is introduced.
文中基于嵌入式实时操作系统，实现了MIMO传输系统中的协议处理、业务汇聚和高速数据传输。
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