Single-level single-line full duplex bus communication method and system

Abstract

The invention discloses a single-level single-line full duplex bus communication method and system. The method comprises the steps that a signal receiving and transmitting end A1 transmits data according to an internal transmission clock F1, monitors the level change of a bus, and analyzes and receives the data; a signal receiving and transmitting end B1 sends data according to an internal transmission clock F2, monitors the level change on the bus, and analyzes the received data; the signal receiving and transmitting end A1 and the signal receiving and transmitting end B1 realize communication through a single line; and the transmission clock F1 > F2* (the length of a data unit + 2). According to the system, single-level single-line full duplex communication is realized by adopting different coding formats and different internal transmitting clocks, so that the number of signal lines is reduced, single-level communication completion can be realized by adopting 0, 1 universal digital level, and the hardware realization difficulty is reduced.

Description

technical field [0001] The invention relates to the field of server boards, in particular to a single-level single-wire full-duplex bus communication method and system. Background technique [0002] In the field of servers, in order to increase the interactivity and adaptability between boards, additional signals are often added between boards, so as to ensure effective communication and mutual recognition between boards. The interconnection between boards is mostly connected by cables. The more signals interacted between boards, the more cables are used, and the printed circuit board (PCB) area occupied by the connector is also smaller. A corresponding increase will result in an increase in hardware cost; meanwhile, the increase in the number of connection points of the connector will also reduce the reliability of signal transmission. [0003] In order to reduce the number of signals between boards, serial-to-parallel conversion is generally adopted to convert multiple pa...

AI Technical Summary

Problems solved by technology

Taking the existing single-wire UART as an example, its working level is 0 and 1, which is a single power supply, but it works in half-duplex mode, which cannot guarantee the real-time interaction between boards and cards.

However, the existing single-wire full-duplex bus adopts the multi-level mode (-1, 0, 1). Judging the received data, the disadvantage is that the hardware scheme is complicated, and it is difficult to realize for digital circuits

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