Method for automatically detecting cascade number of series buses

Abstract

The invention relates to a communication bus, in particular to a method for automatically detecting the cascade number of serial buses, which comprises the following steps that: a system controller resets built-in counters, first communication ports and second communication ports of all communication nodes; the system controller closes the reset signal, the built-in counter starts counting, and a high-level signal at the communication node at the tail end of the bus is transmitted forwards along the cascaded communication nodes; a communication node built-in counter receiving the high-level signal stops working, and the transmission modes of the first communication port and the second communication port are switched; after the system controller receives the high-level signal, the built-in counters of all the communication nodes are reset; the system controller closes the reset signal, the built-in counter starts counting, and a high-level signal sent by the communication host is reversely transmitted along the cascaded communication nodes; according to the technical scheme provided by the invention, the defects that each communication node cannot accurately and timely judge the cascade quantity and the sorting information of the communication node in the prior art can be overcome.

Description

technical field [0001] The invention relates to a communication bus, in particular to a method for automatically detecting the cascading quantity of a serial bus. Background technique [0002] In the serial bus topology of signal communication, the number of serial endpoints will change with the application scenario. The communication host needs to know the number of communication endpoints on the bus in time, and configure the corresponding communication frame structure according to the number of communication endpoints. [0003] In the prior art solutions, the number of communication endpoints is generally judged manually, and then the number of endpoints is configured to the host. This judgment method requires manual intervention, which is very inconvenient and inefficient in some special environments where manual access is difficult and dangerous. Contents of the invention [0004] (1) Solved technical problems [0005] Aiming at the above-mentioned shortcomings exis...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned shortcomings existing in the prior art, the present invention provides an automatic detection method for the cascading quantity of the serial bus, which can effectively overcome the inability of each communication node in the prior art to accurately and timely judge the cascading quantity and self-sorting information gap

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