一个基于串口的树莓派ps/2 Linux驱动.PS/2的DATA线接串口的RX线，PS/2的CLK空置。用前要测试键盘的频率。-Using two resistors, a blue LED, a few other bits, and a kernel module you can use a PS/2 keyboard by connecting it to the Pi serial port. This works because I have found that you can