Single-bus full-duplex data communication method and system

Abstract

The invention discloses a single-bus full-duplex data communication method and system. The single-bus full-duplex data communication method comprises the steps that S100, a first transmitting-receiving terminal uses first voltage as high level, uses second voltage as low level and sends first data information of first frequency to a data bus; S200, a second transmitting-receiving terminal uses the current voltage of the first data information as high level, uses third level as low level and sends second data information of second frequency to the data bus; S300, the data bus simultaneously receives the first data information sent by the first transmitting-receiving terminal and the second data information sent by the second transmitting-receiving terminal; S400, the second transmitting-receiving terminal reads the first data information from the data bus according to the first frequency and the second frequency; S500, the first transmitting-receiving terminal reads the second data information from the data bus according to the first voltage, the second voltage and the third voltage. The single-bus full-duplex data communication method achieve single-bus full-duplex data communication, saves input-output interfaces of a microcontroller and makes the working efficiency further improved.

Description

technical field [0001] The invention relates to the field of data communication, in particular to a single-bus full-duplex data communication method and system. Background technique [0002] At present, the commonly used buses between semiconductor chips include I2C bus, SPI bus, UART bus and so on. These buses all have their own application occasions and have significant advantages in some respects. The I2C bus is composed of two lines, SDA and SCL. Its advantage is that the circuit is simple, and a master control terminal can connect up to 127 devices, which is very suitable for the situation where multiple devices share a set of buses. SPI is composed of CS / CLK / DIN / DOUT four lines, which has the advantage of high speed and can realize two-way data transmission. The UART bus is composed of TX / RX two lines, which can realize full-duplex communication. Whether duplex or half-duplex transmission, these buses generally require multiple data lines. [0003] In an electronic...

AI Technical Summary

Problems solved by technology

[0003] In an electronic system containing an MCU (microcontroller), the MCU often controls multiple peripherals; due to the constraints of packaging and cost factors, the number of IO ports of the MCU is limited, so the MCU often uses serial communication to exchange data with the peripherals. Professionals bring unnecessary troubles and affect work efficiency

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