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Device utilizing RMAP protocol to realize plug-and-play function of CAN bus equipment

A CAN bus, plug-and-play technology, applied in the field of space technology applications, can solve problems such as no application of satellites, save integration time and cost, improve conversion efficiency and real-time data transmission, and simple structure.

Inactive Publication Date: 2015-12-23
BEIHANG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

The RMAP protocol is still in the initial stage of research in China and has not been applied to satellites at present.

Method used

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  • Device utilizing RMAP protocol to realize plug-and-play function of CAN bus equipment
  • Device utilizing RMAP protocol to realize plug-and-play function of CAN bus equipment
  • Device utilizing RMAP protocol to realize plug-and-play function of CAN bus equipment

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Embodiment Construction

[0054] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0055] The SpaceWire bus is a high-speed data bus with a working bandwidth of 200Mbps and full-duplex transceiver. The SpaceWire data receiving module has a clock recovery function, which can recover the received data and clock by using the received DS coded signal, so the data receiving clock and sending clock can work in different clock domains. CAN bus is a low-speed data transmission bus, widely used in industrial and aerospace data transmission. Both interface modules are realized in FPGA through IP soft core, and the two modules respectively communicate with their corresponding data networks, and send or receive data packets in corresponding formats.

[0056] The RMAP target node controller implements the SpaceWire upper application layer RMAP (Remote Memory Access) protocol. Therefore, the RMAP target node data controller can be used to configure reg...

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Abstract

The invention discloses a device utilizing an RMAP protocol to realize the plug-and-play function of CAN bus equipment. The device comprises an RMAP object node controller, a CAN bus controller, a SpaceWire data interface module and an asynchronous data transceiving dual-port RAM, wherein external CAN bus interface sensing equipment is connected with the CAN bus controller, the asynchronous data transceiving dual-port RAM, the RMAP object node controller and the SpaceWire data interface module, the RMAP object node controller comprises an object command packet decoding module, a verification control module and an object node controller module, a DMA module, an object response packet coding module and a CRC data verification module, and the SpaceWire data interface module is connected with a satellite-borne computer and the RMAP object node controller. The device is advantaged in that, the RMAP object node controller is realized through an IP soft core, data conversion efficiency and data transmission timeliness are improved, and design complexity is effectively reduced.

Description

technical field [0001] The invention belongs to the application field of space technology, and in particular relates to a device for realizing the plug-and-play of CAN bus equipment by applying the RMAP protocol. Background technique [0002] CAN bus (ControllerAreaNetwork, controller area network bus) technology is safe and reliable, and is widely used in aerospace and micro-satellite data transmission. SpaceWire bus is based on two commercial standards IEEE1355-1995 and IEEE1596.3 (LVDS); SpaceWire data bus is the backbone network for high-speed data transmission inside the satellite in the future. However, the sensing devices on many existing satellites are developed based on the CAN bus, although domestic related patents have cited the way of the microprocessor to complete the communication between the two data link layer protocols of the CAN bus and the SpaceWire data bus at the software level. However, there is a lack of CAN bus and SpaceWire protocol data conversion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L1/00H04L12/40
CPCH04L1/004H04L12/40123H04L41/0809
Inventor 伊小素陈启宏梁洁玫康阳张昊
Owner BEIHANG UNIV
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