查询方式实现简单按键驱动程序



根据本人《Linux简单字符设备驱动编写方法》一文的步骤，用查询方式简单实现Mini2440开发板的按键驱动程序。



代码共分二个文件，驱动程序<btn_drv.c>和测试程序<btn_test.c>。-Simple ways to search for key drivers



According to my "Linux character device driver writing simple method" steps in the article, the query is simple to achieve with the development board Mini2440 key driver.



Code is divided into two files, drivers, <btn_drv.c> and testing procedures <btn_test.c>.