Design and realization of 1553B bus system based on DSP

In view of characteristics of 1553B bus protocol,the design plan of 1553B bus interface based on DSP was pro-posed.The implementation of hardware circuit and accomplishment of software drivers were described specifically.In the interface circuit,the DSP TMS320F2812 was used as the core processing unit.BU-64843 accomplished 1553B protocol function.The circuit of address decoder and logical control were implemented by FPGA.To ensure real-time of 1553B mes-sages processing,DSP was responsible for controlling and initiating 1553B protocol chip,reading,processing and writing messages.The system can work in mode of BC/RT/MT by configuring the registers of BU-64843.Protocol processing module transmits and receives periodic messages according to communication protocol severely,the accuracy of time error is less than 1μs.