双口RAM驱动程序，对于基于ARM 板子的嵌入式linux开发者，使用到双口RAM，可以在此驱动源码上修改成自己需要的。-Dual-port RAM driver board for ARM-based embedded linux developer, using the dual-port RAM, you can modify the source code in this drive into their needs.

友善之臂TINY2440 GPIO口PWM驱动程序-Friendly arm TINY2440 GPIO port PWM driver