Research And Design Of ARINC429 Technology Based On DSP

ARINC 429 digital information transmission specification is one of the data information transmission standards among the airborne equipments, which at present is used extensively in aviation industrial departments of our country. For the sake of communicating with airborne equipments by the 429 bus at the working site, the ARINC 429 bus data communication system platform is needed.This thesis gives the design of an airborne datum communication board based on ARINC429 Bus, which is adopted DSP as controller, utilized bus interface chip HS-3282 and use self-designed 429 electronic conversion circuit, then form a simple structure datum communication board with high dependability. The self-designed 429 electronic conversion circuit can replace special-purpose converter Chip HS-3182, and reduced the cost. And the logic control circuit makes use of CPLD programming to realize; so, the whole circuit is simple and compact. The part of the software realized with the different function to different module.Concretely, on the basis of describing the communication specification of ARINC 429 with enhanced parallel port(EPP),the standard and the module application of DSP and CPLD,the thesis has proposed the design of the ARINC 429 technology based on DSP system. At first, the function and the application of each module of the system and the operation principle of high-performance CMOS bus interface circuit HS-3282 chip which forms the main body of the data diversion of the interface module are introduced. Secondly, the hardware structure of the interface module is described in detail, mainly including data latch and buffer circuit, choice circuit of transmission rate, etc. And then the design philosophy and flow charts of the software are fully discussed, such as the basic requirement of software, the design and realization of the function. Lately results of hardware and software are reported, focusing on port decipher unit, I/O passway, electric level conversion circuit. The last part of this paper is the brief summary, which gives the advantages and lacks.