设备驱动可以理解为操作系统的一部分，对于一个特定的硬件设备来说，其对应的设备驱动程序是不同的。比如网卡，声卡，键盘，鼠标，显卡等。对于操作系统来说，挂接的设备越多，所需要的设备驱动程序也越多。对于嵌入式系统设计过程中，没有通用的驱动程序可使用。

Linux驱动程序添加实例.doc

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