CAN bus repeater with dual master control modules and its data transfer method
A technology of CAN bus and main control module, which is applied in the direction of bus network and data exchange through path configuration. Reasonable, improve the efficiency of data transmission, and avoid the effect of data transmission conflict
Active Publication Date: 2017-08-22
STATE GRID CORP OF CHINA +1
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Problems solved by technology
[0003] The present invention provides a CAN bus repeater with dual main control modules and its data transfer method, which overcomes the above-mentioned deficiencies in the prior art, and can effectively Solve the problems of poor reliability, low data forwarding capability, and inability to meet large amounts of data transmission in existing single-master CAN bus repeaters
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Embodiment 1
[0035] Embodiment one: as attached figure 1As shown, the CAN bus repeater with dual main control modules includes a data read-in interface 1 for reading data transmitted by the CAN bus; a dual-port RAM memory module 2 for storing data read-in interface 1 input Data; the first latch 3 is used to latch the first queue data output by the dual-port RAM memory module 2; the second latch 4 is used to latch the second queue data output by the dual-port RAM memory module 2 Latching; the first main control module 5 is used to forward the data stored in the first latch 3; the second main control module 6 is used to forward the data stored in the second latch 4; the first CAN interface 7, Used to transmit the data forwarded by the first main control module 5; the second CAN interface 8 is used to transmit the data forwarded by the second main control module 6; the parallel-to-serial conversion module 9 is used to transmit the data transmitted by the first CAN interface 7 The data transm...
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The invention relates to the technical field of CAN bus data relay transmission device, and is a CAN bus repeater with dual master control modules and a data transfer method thereof, which includes a data read-in interface, a dual-port RAM memory module, a first latch device, the second latch, the first main control module, the second main control module, the first CAN interface, the second CAN interface, the parallel-to-serial conversion module and the data output interface; wherein the first main control module is forwarding the first lock At the same time as the data stored in the second latch, the second main control module is forwarding the data stored in the second latch. The invention has a reasonable and compact structure and is easy to use. By changing the single master control structure of the existing CAN bus repeater into a double master control structure, the data queues are processed in parallel, and the two master control modules adopt an intercommunication mechanism and Bus interlock realizes fast forwarding of transit data, which not only avoids data transmission conflicts, but also improves data transmission efficiency, and has the characteristics of safety, reliability and high efficiency.
Description
technical field [0001] The invention relates to the technical field of CAN bus data relay transmission devices, and relates to a CAN bus repeater with dual master control modules and a data transfer method thereof. Background technique [0002] At present, CAN bus has been widely used in various automation control systems, such as automotive electronics, automatic control, and intelligent buildings, due to its low development cost, high bus utilization rate, long transmission distance (up to 10 kilometers), and high transmission rate. , power system, security monitoring and other fields. With the expansion of the CAN bus network area, the direct data transmission between two nodes will be difficult to meet the long-distance communication requirements. The CAN repeater is a relay station that extends the communication distance of the CAN bus, and its communication efficiency and reliability directly affect the communication capability of the CAN bus. The existing CAN repeat...
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IPC IPC(8): H04L12/40
Inventor 姚永波崔力民李明
Owner STATE GRID CORP OF CHINA