天嵌2440主板，LED灯测试程序，包括内核驱动源码，测试程序。-2440 days of embedded motherboards, LED lamp test procedures, including the kernel driver source code, test programs.

天嵌2440主板，键位测试程序，里面包括键位内核加载，和测试程序。-2440 days of embedded motherboards, the key bit test program, which includes key bit kernel load, and testing procedures.

瑞芯微rk3288pcb和原理图。对设计开发主板很有用的。。(Ruixin micro rk3288pcb and schematic diagram.It is very useful for designing and developing motherboards.)