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

clk测试程序时钟输入连接ad9517跟adf4351，输出看的clk(Clk test program clock input connection ad9517 with adf4351, the output look clk)