A serial bus failure detection method for single bus master-slave protection device
A technology of serial bus and protection equipment, which is applied in the field of fault handling of electronic equipment, can solve the problems of complex implementation, inflexibility, inconvenience, etc., and achieve the effect of improving rapid response ability, rapid detection, and avoiding misoperation
Inactive Publication Date: 2010-09-29
韦德宗
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Problems solved by technology
However, for some devices that require a higher rate of bus transmission, or are inconvenient to deal with the more complex protocols of these standard serial buses, a better method is needed to meet the requirements for communication between internal modules of the device
For the failure of the main module or the bus, the system needs to have a fast response capability to avoid misoperation of the device due to incorrect data on the bus. At present, most of the methods for judging bus failures are complicated and not flexible enough
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[0024] The invention uses software or programmable logic devices to customize the frame structure of the data transmitted on the serial bus, and adds appropriate overhead bytes, thereby flexibly meeting the requirements for communication between internal modules of the device.
[0025] The frame structure of serial bus data is as follows: figure 2 As shown, in the frame structure, add a byte whose position and value are fixed, of course, the existing frame header byte or other bytes whose position and value are fixed can also be used to define it as a bus fault indication Byte, by checking whether the value of the byte is correct to determine whether the bus is working normally. Fault indication bytes are not limited to figure 2 The position shown can be set at any time slot of the frame structure.
[0026] The total number of bytes in the frame structure is limited by the total length of time the device is forced to switch. This is because, if the total time for active-s...
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The invention discloses a method for detecting faults of the serial bus in single-bus main-backup protection equipment, which realizes the fault detection simply, flexibly and efficiently. The data frame of the bus transmission includes a fault indication byte, and the method includes the steps: (a) the system receives a data frame delivered by a main module or a backup module and judges whether the fault indication byte in the data frame is identical with the preset value or not, if yes, execute the step (b), or execute the step (c); (b) normally process the received data; (c) discard the data frame, submit the bus fault warn, start the main-backup module switch, and return to the step (a).
Description
technical field [0001] The invention relates to the fault processing technology of electronic equipment, in particular to the bus fault detection and processing technology of the equipment which provides the hot backup protection function of the main and standby modules and which shares a group of serial buses with the main and standby modules. Background technique [0002] In the backbone network, medical equipment, industrial control and other fields, the reliability requirements for electronic equipment are very high. It is generally required that the equipment can maintain stable operation for a long time as a whole, and when a failure occurs, it can automatically isolate the fault or automatically start the main and backup protection. Once the equipment in these fields fails suddenly, it will cause great economic losses and even endanger personal safety. For fields with high reliability requirements, a commonly used solution is to use redundant design technology to carr...
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IPC IPC(8): H04L12/24H04J3/08
Inventor 闫树军石鸿斌
Owner 韦德宗