瑞芯微rk27xx芯片的开发指南，包括操作系统、软件开发等介绍-Rockchip rk27xx chip development guidelines, including operating systems, software development, introduced

rk27xx SDK 固件升级笔记及编译链接参数学习笔记-rk27xx firmware update nots and the link scr ipt note.

Mp4播放器界面修改工具，主要是针对瑞芯微RK27芯片的，可以自己调整开关机，画面，还有部分按键-Mp4 player interface modification tool, mainly for Rockchip RK27 chip, you can adjust your own switch, screen, there are some key