这是我学习驱动开发的第一个小程序. 控制LED灯的开和关. 共有两个文件 gpioctl.c 是驱动程序, main.c是LInux下的测试程序.-This is my learning-driven development of the first applet. Control LED lights OFF. Gpioctl.c a total of two documents is the driver, main.c is