Serial communication equipment, serial communication system and serial communication method

Abstract

The invention discloses serial communication equipment, a serial communication system and a serial communication method; the serial communication equipment comprises an input unit, an output unit, a storage unit, a gating unit and a control unit; the serial communication equipment has a first mode used for receiving data, a second mode used for transmitting data, and a third mode used for sending data; the control unit is used for switching between the first, second and third modes; in the first mode, the gating unit connects the input unit with the storage unit; in the second mode, the gating unit connects the input unit with the output unit so as to directly output received data; in the third mode, the data in the storage unit can be outputted by the output unit. In the serial communication system comprising the cascade serial communication equipment, the method and system can reduce the time for transferring signals to the next level serial communication equipment, thus improving communication efficiency and performance.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a serial communication device, a serial communication system and a serial communication method. Background technique [0002] Serial communication is to divide the data into binary bits (bits) one by one, and then the host end and the slave device use a line or a communication channel to realize the communication (data exchange) between the host end and the slave device. As a flexible, convenient and reliable communication technology, serial communication has many advantages such as occupying less hardware resources, greatly reducing the cost of communication lines, simplifying communication equipment, flexible application, and easy maintenance. Communications, smart instruments and other fields have been widely used. [0003] Serial communication requires both communication parties to abide by the same protocol, so that both parties can complete the sending and receiving ...

AI Technical Summary

Problems solved by technology

Assuming that the data required by the first-level slave device 201 is the first data sent by the host, when the first-level slave device 201 receives data with a length of m, its control unit detects that it is the data required by the device, Then store it in the storage unit. At this time, it takes time T. The first-level slave device continues to receive data with a length of m. The device starts to receive data, that is, the second-level slave device needs to wait for 2*T before starting to receive and process the data; that is, because the slave device must receive and then judge whether to forward, resulting in a waste of T delay

Since each level of slave equipment needs to make a reception judgment, this delay waste will be gradually transmitted and accumulated in all levels of slave equipment

[0005] It can be seen from the above that in this serial communication system, since each level of slave equipment needs to receive data and judge before deciding whether to forward it, and at this time the next level of slave equipment will be waiting, wasting T time

With the complexity of application requirements, when the communication efficiency and performance requirements of serial communication are getting higher and higher, such as when the number of slave devices is large and the data is long, it will bring greater impact to the efficiency of the serial communication system. influences

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