Grating signal acquisition system with I~2C interface

Subdivision and differentiation direction circuit is wide used in industrial control. So,a subdivision,differentiation direction and counter system for grating signal based on FPGA were designed. The devices include some powerful features,such as low-cost,high density and programming on line. Now,I2C -bus become a standard scheme in embedded applied,so,the system communicates with I2C interface. The I2C interface was designed by FSM (Finite State Machine).Simulation shows that the system works well.