| Along with our country’s emphasis on aviation industry investment, and the progress of the large aircraft project, many domestic enterprises and research institutes began to research areas, avionics and ARINC429 bus is a kind of very common air bus. New modern civil aircraft such as Boeing787, and our country is developing the production of the C919 aircraft intelligent electronic system needs a large amount of data channel and the amount of data.Currently on the market of ARINC429 bus interface card is expensive, function is simple, in the realization of time cycle of multiple label send function, is mostly implemented by software timing, timing accuracy is not high and easy for data congestion phenomenon,especially in need of multi-channel occasions. The modern airborne electronic system development until now, most are very complex, needs a lot of ARINC429 bus channel, routine to meet the requirements of the ARINC429 interface card, so design a hardware independent timing cycle sending function of multi-channel air bus board is particularly important.Based on the research of the aviation bus and FPGA, this paper designed a multi-channel hardware timing to send aviation bus communication interface card. System USES FPGA as the core device, USES the parallelism to achieve the multi-channel data receiving and sending,adopt the special level conversion chip HI8570 and HI8445 ARINC429 bus and constitute a has high reliability, and can realize hardware independent timing cycle send multichannel ARINC429 bus interface board. IP and design, to facilitate subsequent improvements.Because of the complexity of the design, the use of direct board level test method is time-consuming, laborious and use the VMM verification methodology, from the full verification to the design code level. Paper focused on the construction of the system hardware, FPGA programming, and based on the VMM validation, etc. Finally through the verification results show that under test design can satisfy the design index, achieve the desired effect. |
