Open type port automatic identification system, method and storage medium

Abstract

The invention discloses an open type port automatic identification system which comprises a main controller, an expansion board and an expansion slot. The expansion slot is connected with the main controller and the expansion board. The expansion board further comprises an expansion interface module and a voltage detecting module. The expansion interface module is connected with the voltage detecting module. The voltage detecting module is used for detecting the current voltage at the IO interface of the expansion interface module. The main controller is used for receiving the current voltage,compares the current voltage with preset voltage and determines the type of the expansion interface module. The open type port automatic identification system can automatically identify the port andcorrespondingly loads a driver and configures a port function. The open type port automatic identification system has advantages of preventing errors caused by artificial intervention, improving debugging and maintenance efficiency, greatly reducing circuit cost, improving reliability, realizing multiple functions and realizing open type management for configuration port.

Description

technical field [0001] The invention relates to the technical field of embedded systems, in particular to an open port automatic identification system, method and storage medium. Background technique [0002] At present, power equipment systems all use embedded intelligent terminals, which not only have conventional measurement and calculation functions, but also have remote communication and intelligent control functions. The communication and control functions also have a variety of interfaces, such as CAN bus, 485 bus, WIFI, RJ45 and other bus interfaces. The control interface not only has the input and output of the switch, but also may need to have the input and output of the analog quantity. According to the individual needs of different users in different occasions, these interfaces are designed as independent module circuits, which are directly inserted into the expansion slot of the device when in use. Usually for embedded terminals, there are only a few expansion...

AI Technical Summary

Problems solved by technology

First of all, the cost of using more single-chip microcomputers is undoubtedly high; secondly, the port configuration is not flexible, and it takes multiple data exchanges to obtain the information of the inserted device before loading the corresponding driver; thirdly, it is more complicated to implement an open configuration port for this solution

[0008] For the solution with frequency output on the expansion module, the circuit structure is relatively complicated; considering the cost, most designs use a 555 timer to generate a certain frequency signal. When the module is powered on, it outputs a frequency signal on an IO port. Different modules In the above, the set frequency is different, and the equipment needs to be able to detect the frequency signal of the expansion module; due to the device error, the two different frequencies must be limited within a certain range, and a certain range difference must be maintained, otherwise it is easy to cause misjudgment; for production Debugging is somewhat difficult

[0009] For many devices, only the plug-in modules are automatically detected and identified, and then their functions are fixed. For example, many electric energy meters and switch input and output functions cannot be configured by the user during use, and the corresponding function programs must be programmed by the original factory. To change its function, open port configuration cannot be realized

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