本来以为模拟PS2协议相当的麻烦，今天下了一本PS2协议手册看了半天，原来读键盘值相当简单嘛，比模拟SPI、I2C简单多了呵呵。-Considerable agreement that the simulation would have trouble PS2, PS2 today an agreement under the manual looked a long time, the original value of reading the keyboard is quite simple

decoder in vhdl A decoder is a circuit that changes a code into a set of signals. It is called a decoder because it does the reverse of encoding, but we will begin our study of encoders and decoders with decoders because they are simpler to design.

演示demo 更清晰更明了 快速便捷 简洁。(The demo demo is clearer and clearer and faster and simpler.)