Arbitration Type Extendable Multiplexed Communication Design And Optimize Arbitration Algorithm Research

In the modern military, civil aircraft, a lot of information needs to be transmitted in the system. The ANINC-429digital information transmission standard has already become the industry standard of the avionics digital information transmission. At present, A lot of bus interface technology design research based on the data transmission ARINC-429and so dose the multiplexed ANINC-429digital signal design research. Many of them are realized through the interrupted form. Due to interrupt pin limited cause resource constraints so as to make the device extension has the certain difficulty. How to be able to effectively expand multi-channel equipment is worth studying.After studying of existing multi-channel ANINC-429equipment design.This paper proposed a new design of it by using arbitration. this paper adopts extensible arbitration module way to design multi-channel ANINC-429bus data interface, improve the interrupt mode due to interrupt pin to expand limited. This paper also did some research in the arbitration algorithm, And proposed the circulation weighted tree arbitration algorithm which improved the same group of various equipment be vying for the bus probability is too centralized phenomenon,based on the packet circulation arbitration algorithm. At last,Based on the ISA bus standard, this paper selected the HS-3282chip and other logical device to turn the ANINC-429bus information to the ISA bus information. Which solve the problem of communication between ISA bus and429bus.