FPGA-based baud rate online detection method

Abstract

The invention discloses a FPGA(field programmable gate array)-based baud rate online detection method and belongs to the technical field of communication. The method is characterized in that serial data are simultaneously accessed into each baud rate detection sub-module in parallel to detect formats and widths of code elements, hitting signals are outputted if the target is hit; if the level time width of the serial data is less than the width of the code element corresponding to the baud rate detection sub-module, deviation signals are outputted; after processing modules are counted, and hitting signals and deviation signals are independently counted and multiply by different expanded factors, the detection baud rate corresponding to the baud rate detection sub-module including the maximum value is correct. The baud rate of the hardware can be detected online by the FPGA, so that the limit of in advance establishing protocols between a sending terminal and a receiving terminal is eliminated, real-time detection is realized, the communication efficiency is improved and the dependence on other manners is lowered; the baud rate is hit according to the formats and the widths of the code elements and combined with the deviation signals, thereby increasing the hitting reliability.

Description

technical field [0001] The invention relates to an online baud rate detection method, specifically an FPGA-based baud rate online detection method, which belongs to the technical field of communication. Background technique [0002] At present, the mainstream baud rate adaptation is generally realized through the joint cooperation of the receiver and the sender of the adaptive protocol. For example, in the baud rate adaptation stage, the sender sends the specified data, and the receiver uses the enumerated baud rate to receive and send When the received data is the data sent by the protocol, it is considered that the communication baud rate is the currently enumerated baud rate. In the process of low-speed and low-cost inter-board communication, the UART transmission communication method is usually used. During the communication process, the receiving end often does not know the baud rate of the sending end, and cannot perform adaptive communication. In the prior art, the...

AI Technical Summary

Problems solved by technology

In the process of low-speed and low-cost inter-board communication, the UART transmission communication method is usually used. During the communication process, the receiving end often does not know the baud rate of the sending end, and cannot perform adaptive communication.

In the prior art, the method of detecting the baud rate by software mutual agreement is usually used, but its real-time and accuracy are poor, which affects the communication efficiency

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