这一层顾名思义就是主机(计算机)和控制器(蓝牙设备)之间的接口。

This layer is literally the interface between the host (your computer) and the controller (the Bluetooth device).

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usb主机控制器遵循两个标准之一：UHCI(通用主机控制器接口)或OHCI(开放式主机控制器接口)。

USB host controllers follow one of two standards: UHCI (Universal host controller Interface) or OHCI (Open host controller Interface).

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蓝牙规范包含了一个符合标准的接口定义(主机控制器接口)，它适用于蓝牙通讯模块的硬件部分。

The Bluetooth specification includes the definition of a standardised interface (the Host Controller interface) to the hardware of a Bluetooth communications module.

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