Multiplexing serial port protocol converter

Abstract

The invention provides a multiplexing serial port protocol converter. The multiplexing serial port protocol converter obtains inquiry instructions from an upper computer and verifies the inquiry instructions according to a dynamic link library function. The multiplexing serial port protocol converter judges whether the inquiry instructions successfully verified exist in an instruction buffer zone or not, if yes, judges whether an effective return result of the inquiry instructions exists in the instruction buffer zone or not and returns the return result to the upper computer, and if not, stores the inquiry instructions in the instruction buffer zone. The serial port protocol converter sequentially sends the inquiry instructions to a serial port device according to priority levels of the inquiry instructions, and sends the inquiry instructions successfully verified to the serial port device. The serial port device answers the inquiry instructions and returns a result. The multiplexing serial port protocol converter verifies effectiveness of the return result according to the dynamic link library function, stores the return result successfully verified in the instruction buffer zone, and defines and judges whether the return result can be sent to the upper computer or not according to status of the instruction buffer zone. The multiplexing serial port protocol converter is high in accuracy and high in speed.

Description

technical field [0001] The invention relates to a serial port device, in particular to a multiplexing serial port protocol converter. Background technique [0002] In the data acquisition application environment of the power environment monitoring system in the computer room or similar systems, the serial port data acquisition of monitored objects such as I / O data collectors, power supply equipment, intelligent air conditioners, and access control controllers usually uses "serial port protocol converters". "Convert the serial port data of the monitored object into IP data format, and then upload it to the host computer monitoring system through the Ethernet port of the serial port protocol converter. [0003] However, the existing serial port protocol converter can only receive and process an instruction sent by a host computer within a certain period of time, so if multiple host computers simultaneously access the same serial device (monitored object) through the serial por...

AI Technical Summary

Problems solved by technology

[0009] The present invention proposes a multiplexing serial port protocol converter, which solves the problem of data transmission accuracy when multiple host computers operate on a single serial port and improves the response speed of the serial port

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