The link layer refers to the device drivers providing access to the physical layer, which could be numerous mediums, such as serial links or Ethernet devices.
链路层是指提供对物理层访问的设备驱动程序，这可以是各种介质，例如串口链路或以太网设备。
IrDa chips incompatible with the serial driver have their own device drivers.
与串行驱动器不兼容的IrDa芯片有自己的设备驱动程序。
The Linux source tree provides a drivers subdirectory that is further divided by the various devices that are supported, such as Bluetooth, I2C, serial, and so on.
Linux源码树提供了一个驱动程序子目录，这个目录又进一步划分为各种支持设备，例如Bluetooth、I2C、serial等。
For example, more device drivers, such as network interface card (NIC) drivers and parallel and serial port drivers, are available for Linux than for commercial operating systems.
例如，用于Linux的设备驱动程序要比用于商业操作系统的设备驱动程序多，如网络接口卡(NIC)驱动程序以及并口和串口驱动程序。
Most IrDa chips in the SIR mode are UART 16650-compatible (16650 is a common PC UART), so the legacy Linux serial port drivers can serve as link-level drivers.
大多数处于SIR模式的IrDa芯片是UART 16650兼容的（16650是一种公共PC UART），因此传统Linux串口驱动程序可以充当链路级别的驱动程序。
By using the serial data output, drivers can be cascaded for interface applications requiring additional drive lines.
通过使用串行数据输出，驱动器可级联需要附加驱动线路的接口应用。
These drivers include Serial port, LCD, Touchscreen, and I2C bus driver which is used to control keyboard.
其内容包括串口驱动、LCD驱动、触摸屏驱动及控制键盘的I2C总线驱动。
These drivers include Serial port, LCD, Touchscreen, and I2C bus driver which is used to control keyboard.
其内容包括串口驱动、LCD驱动、触摸屏驱动及控制键盘的I2C总线驱动。
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