Multi-device bus communication method and electronic device

Abstract

The invention relates to the technical field of communication, in particular to a multi-device bus communication method and an electronic device, and the method comprises the steps: employing a data line and a clock line, employing a single device to operate the clock line, and generating a lasting rectangular wave; when the data line is used for sending dat, triggering the data line behind the upper edge of the clock line, and when the data is received, triggering the data line immediately behind the lower edge of the clock line; wherein frames for transmitting data comprise an address frame used for a standard message destination address, a data frame used for transmitting control information or data to equipment, and a verification frame used for verifying data transmission accuracy according to message organization. Only two data lines are used as communication lines, compared with SPI, the utilization rate of the data lines is high, each device only operates one data line, compared with I2C, the operation logic is simple, the number of the devices capable of being operated exceeds I2C, the number of the devices capable of being operated exceeds I2C, an extensible check frame is provided, and the error omission ratio can be reduced to a very random low level.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a multi-device bus communication method and electronic equipment. Background technique [0002] At present, there are three widely used communication protocols for host devices: I2C, SPI, and UART. [0003] UART is an asynchronous full-duplex serial communication protocol, which consists of two data lines Tx and Rx. Because there is no reference clock signal, the two sides of the communication must agree on the serial port baud rate, data bit width, parity bit, stop Configure parameters such as bits to communicate at the same rate. UART belongs to asynchronous transmission, but it has strict timing requirements. Under the same signal quality, the speed is slower. [0004] SPI is a synchronous serial interface technology introduced by Motorola, which is a high-speed, full-duplex, synchronous communication bus. The SPI data rate can reach several Mbps. In general applicat...

AI Technical Summary

Problems solved by technology

The SPI data rate can reach several Mbps. In general applications, there are 4 signal lines: MOSI, MISO, SCK, CS. Compared with UART, there is one more synchronous clock line, and the communication speed is fast, but multiple devices often need multiple CS lines. , or use additional structures such as decoders to switch, increasing hardware complexity

[0005] I2C uses 2 data lines, the speed is not high, and the network connection is simple, but the data processing is more complicated, and there are many intermediate states. At the same time, I2C requires each device to read and write 2 data lines at the same time, and the hardware logic is relatively complicated.