一步 教你如何去编译uclinux内核，包括文件系统ext2的挂载，网络驱动，基本的cash命令，lcd frambuffer功能，串口功能等内容。-teach you step by step how to compile Basis kernel, including ext2 file system mount, network drives, the basic cash orders, LCD frambuffer functions, such as serial port func

利用mmap在frambuffer中画点，划线，图形，ioctl功能实现-Using mmap in frambuffer in drawing point dash, graphics, ioctl function realization

将jpeg图片转换成RGB数据，在frambuffer显示，RGB888转RGB565-Convert jpeg image the RGB data displayed frambuffer, RGB888 turn RGB565