Interface conversion module of spaceborne electronic system

An electronic system and interface conversion technology, applied in the direction of electrical digital data processing, instruments, etc., can solve the problems of SpaceWire signal 485 signal and 422 signal can not be converted to each other, poor compatibility, etc., to promote modular design, reduce design costs, promote The effect of resource sharing

Active Publication Date: 2013-04-03
赛德雷特(珠海)航天科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that SpaceWire signal and CAN signal, 485 signal and 422 signal cannot be mutually converted and the compatibility is poor in the prior art, the present invention proposes an interface conversion module for an on-board electronic system

Method used

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  • Interface conversion module of spaceborne electronic system

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specific Embodiment approach 1

[0028] Specific implementation mode 1. Combination figure 1 Specifically illustrate the present embodiment, the on-board electronic system interface conversion module described in the present embodiment, it comprises the FPGA module 1 based on SRAM, the second generation double data rate synchronous DRAM 2, single-chip microcomputer 3, static Random access memory 4 and FLASH memory 5, described FPGA module 1 based on static random access memory comprises SpaceWire codec IP core 1-1, signal conversion circuit 1-2, routing circuit 1-3, CAN codec module 1-4, 485 codec module 1-5, 422 codec module 1-6, state control circuit 1-7, monitoring circuit 1-8 and FPGA configuration port 1-9,

[0029] The signal conversion circuit 1-2 has a total of: three data signal input and output terminals, one heartbeat signal output terminal and one buffer signal terminal,

[0030] Routing circuits 1-3 have a total of: five data signal input and output terminals and one heartbeat signal output term...

specific Embodiment approach 2

[0050] Specific embodiment two, combine figure 1 Specifically illustrate this embodiment, the difference between this embodiment and the on-board electronic system interface conversion module described in the first embodiment is that it also includes a CAN controller 6, and the data signal input and output terminals of the CAN controller 6 are connected to the The data signal input and output ends of the CAN codec modules 1-4 are connected.

[0051]The CAN data stream in this embodiment is set by the SJA1000 on parameters such as the code rate and clock frequency division, and then input to the on-chip CAN codec module 1-4, decoded to obtain the CAN data frame, and transmit it to the routing circuit 1-3, and the routing circuit 1-3 assigns ports and transmits them to the signal conversion circuit 1-2. The signal conversion circuit 1-2 converts the CAN data frame into a data frame conforming to the SpaceWire protocol, and finally encodes and outputs the IP core 1-1 through Spac...

specific Embodiment approach 3

[0053] Specific embodiment three, combine figure 1 Describe this embodiment in detail. The difference between this embodiment and the on-board electronic system interface conversion module described in the first embodiment is that it also includes a first digital integrated circuit 7, and the data signal of the first digital integrated circuit 7 The input and output ends are connected with the data signal input and output ends of the 485 encoding and decoding modules 1-5.

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Abstract

The invention relates to an interface conversion module of a spaceborne electronic system, which belongs to the technical field of spaceflight data processing, and solves the problems in the prior art that a SpaceWire signal cannot be mutually converted with a CAN signal, a 485 signal and a 422 signal, and the compatibility is poor. After the interface conversion module is electrified, a single chip microcomputer reads a configuration file prestored in a FLASH internal memory, and an FPGA module based on a static random memory is configured through an FPGA configuration port. In the data conversion and transmission process, a signal conversion circuit and a routing circuit continuously output heartbeat signals with a certain period and pulse width and a monitoring circuit constantly monitors whether an abnormal phenomenon exists not. When the output pulse signal is often high and often low or irregular on the period, the monitoring circuit reports the abnormal phenomenon to a state control circuit, the state control circuit sends a control signal to an off-chip single chip microcomputer to command the single chip microcomputer to read the configuration code stream in the FLASH internal memory, and the FPGA module is reconfigured through the FPGA configuration port.

Description

technical field [0001] The invention relates to an interface conversion module, in particular to an interface conversion module of an on-board electronic system. Background technique [0002] With the continuous development of electronic technology and computer technology, the complexity of space missions has increased, and the data interface forms of future spaceborne equipment will be diversified. Therefore, it is necessary to design an efficient interface conversion module to simplify the internal circuit structure of the satellite and reduce design costs. , so that the satellite integrated electronic system can achieve high integration and comprehensiveness, and fully realize resource sharing and information fusion. [0003] With the rapid development of the SpaceWire high-speed bus in the aerospace field, it has gradually become the standard bus for onboard electronic systems. The existing technology has the problem of incompatibility between SpaceWire signals and CAN s...

Claims

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Application Information

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IPC IPC(8): G06F13/40
Inventor 张迎春束磊刘源李兵黄瀚罗红吉潘小彤
Owner 赛德雷特(珠海)航天科技有限公司
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