Description: Development board 4412 ARM9 development, through the use of miscdevice driver framework to build device nodes, development and testing gpio key drive test, the use of ioctl function call test implementation, which lard detailed comments
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04misc_ioctl\01led_key\Makefile
............\.........\test.c
............\.2misc_led\app.c
............\..........\Makefile
............\..........\test.c
............\.3ioctl\app.c
............\.......\led_req.h
............\.......\Makefile
............\.......\test.c
............\01led_key
............\02misc_led
............\03ioctl
04misc_ioctl
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