网名“鱼树”的学员聂龙浩，
学习“韦东山 Linux 视频第 2 期”时所写的笔,笔记很详细,供大家参考。
也许有错漏,请自行分辨。
目录
1 概念介绍 ................................................................................................................................................................ 3
Sysfs: ......................................................................................................................................................................... 3
内核对象机制： ................................................................................................................................................... 3
Kobject: ........................................................................................................................................................... 3
设备模型结构（/include/linux/device.h）： .................................................................................................. 3
在内核中加入新驱动： ...................................................................................................................................... 4
驱动程序原理图： ............................................................................................................................................... 5
2.字符设备驱动 LED 驱动程序_编写编译： ..................................................................................................... 6
“应用进程” 和 “驱动程序”如何联系： ......................................................................................................... 6
Struct file 数据结构如下： ........................................................................................................................ 8
一，内核和驱动过程： ...................................................................................................................................... 9
二，注册驱动函数细节： ............................................................................................................................... 11
总结过程：驱动程序和应用程序的联系 .................................................................................................... 12
从应用层看： ............................................................................................................................................. 12
从驱动程序看：如操作 LED ................................................................................................................... 12
四，写一个简单的字符驱动程序： ............................................................................................................. 13
1，一个简单的框架： ............................................................................................................................. 14
驱动程序中设备号： ................................................................................................................................ 16
应用程序设备节点： ................................................................................................................................ 16
完善点亮 LED： ................................................................................................................................................. 17
一，分析：完善硬件操作 ............................................................................................................................... 17
先查原理图： ............................................................................................................................................. 18
二，写代码：硬件上的操作： ...................................................................................................................... 19
总结：写一个驱动程序。 ............................................................................................................................... 23
3 查询方式获取按键值： .................................................................................................................................... 26
一，驱动框架实现： ........................................................................................................................................ 26
二，硬件操作： ................................................................................................................................................. 27
LINUX 异常处理结构、中断处理结构： ...................................................................................................... 31
一，Linux 异常处理体系结构 框架： ........................................................................................................ 31
LINUX 中处理中断的过程： ................................................................................................................ 31
