硬件抽象层利用底层微内核提供的API对底层硬件和外设进行访问和控制，提供一个抽象硬件平台和统一的硬件接口。
We provided an abstract hardware platform and a unified hardware interface by the use of the underlying microkernel APIs for the underlying hardware and peripherals to access and control.
在软硬件开发平台的基础上，本文还详细介绍了硬件接口层的软件设计和应用层的软件开发和设计过程。
On the basis of both the hardware and software development platform, this paper introduces the detailed software design process of hardware abstract layer and system application layer.
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