增量式光电编码器输出四分频脉冲计数，分别为A，B两路信号,Incremental optical encoder pulse count output frequency of a quarter, namely A, B two-way signal

增量式光电编码器计数器的FPGA实现程序,verilog3段式FSM,异步加载.-Incremental Optical Encoder counter program FPGA implementation, verilog3 struts FSM, asynchronous load.

可以对增量式编码器输出的AB相信号进行整数分频。有一个简单的通讯接口，可设定分频大小。 -Incremental encoder can output an integer number for AB believe frequency. There is a simple communication interface, can set the size frequency.