Decoding of BISS-C Protocol Based on FPGA

In order to evaluate the attitude accuracy of high-precision inertial navigation system, a decoding method of BISSC protocol based on FPGA is proposed to provide attitude reference using turntable. Aiming at the decoding requirement of absolute encoder, the data receiving software of absolute encoder is designed using FPGA, the state machine, and the decoding function of BISS-C protocol is realized. On this basis, the host computer display software based on LabVIEW is designed, which collect and display the angle value of absolute encoder with RS232. Experiments show that the system receives and displays data correctly.