Half-duplex communication method and related device

Abstract

The invention discloses a half-duplex communication method. Before communication, a sending end and a receiving end agree on a clock period in advance, and transmit data according to the agreed clock period. When clock of the sending end needs to be synchronized with that of the receiving end, the sending end sends a synchronization signal to the receiving end, the synchronization signal enables that communication equipment at the receiving end adjusts a clock signal, and thus, clocks of the sending end and the receiving end are kept synchronous. Clock of the sending end is synchronized with that of the communication equipment at the receiving end according to preset conditions, namely it is not required to transmit clock signals always during data transmission instead, the synchronization signal needs to be sent when the preset condition is met. In addition, the synchronization signal is transmitted together with data flow instead of occupying a special clock line, so that the clock line can be also used for data transmission, existing lines of the communication equipment can be used for data transmission to the largest degree, and the data transmission rate of the communication equipment is improved.

Description

technical field [0001] The present disclosure relates to the technical field of communication, and in particular to a half-duplex communication method and a related device. Background technique [0002] The half-duplex communication method can realize two-way communication, but it cannot be carried out in both directions of sending and receiving at the same time, and must be carried out alternately. In other words, each end of the communication channel can be the sending end or the receiving end, but at the same time, there can only be one transmission direction. For example, terminal A and terminal B communicate through half-duplex communication, terminal A acts as the sending end, terminal B acts as the receiving end, terminal A sends data, and terminal B receives data; after terminal A sends the data, terminal A Switch to the receiving end, terminal B switches to the sending end, and terminal B sends response data to terminal A. [0003] A half-duplex communication syst...

AI Technical Summary

Problems solved by technology

In this way, only the data line can be used to transmit data. When there is a large amount of data transmission, the transmission efficiency of this communication method is low.

[0004] In addition, for some half-duplex communication protocols, for example, the SDIO (Secure Digital Input and Output Card) bus includes 1 clock line, 1 command line, and 4 data lines. When transmitting data, the command The line is basically idle, but the command line cannot be used to transmit data, resulting in a limited bus transmission rate

Another example, I 2 The C bus has 1 clock line and 1 data line. The clock line cannot be used to transmit data, and the existing bus resources cannot be used to transmit data to the greatest extent.

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