Linux按键驱动程序设计详解---从简单到不简单
http://blog.csdn.net/coding__madman/article/details/51399353 http://blog.csdn.net/coding__madman/article/category/6049271这里还有不少的驱动开发文章,不错! http://blog.csdn.net/xukai871105/article/details/38456079
Linux下用文件IO的方式操作GPIO(/sys/class/gpio) https://www.zhihu.com/question/19704852 http://www.tuicool.com/articles/mmaARfu
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