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

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

Mp4播放器固件包查看解包工具，主要是针对瑞芯微RK27芯片的，固件包的浏览程序-Mp4 player firmware package to view unpack tool, mainly for Rockchip RK27 chip firmware package browsing program