DEMO
....\EBOOT.bin
....\EBOOT.nb0
....\NK.bin
....\STEPLDR.bin
....\STEPLDR.nb0
....\USB烧写专用文件
....\...............\OK6410_SDboot.nb0
....\...............\SD_Writer.exe
....\一键烧写专用文件
....\................\IROM_SD_EBOOT_SDFUSER.nb0
....\................\SD_Writer.exe