CN111371869A - Multi-channel communication monitoring method based on intelligent multi-channel gateway - Google Patents

Abstract

The invention discloses a multipath communication monitoring method based on an intelligent multipath gateway, which initializes each path of communication of the intelligent multipath gateway and saves a descriptor of each path of communication; creating a descriptor set; newly building a thread and initializing the thread; initializing a descriptor set; adding the descriptor of each road channel to a descriptor set; a congestion monitoring descriptor; testing whether each path of communication is readable; and reading and processing the data. The multi-channel communication monitoring method based on the intelligent multi-channel gateway simplifies the flow of receiving external interface data and reduces the expenditure of system resources; the interaction efficiency of the system and the external interface is improved, and the problem that the intelligent gateway cannot timely receive and process the external interface data is effectively solved.

Description

Multi-channel communication monitoring method based on intelligent multi-channel gateway

Technical Field

The invention relates to the technical field of Internet of things, in particular to a multi-channel communication monitoring method based on an intelligent multi-channel gateway.

Background

The intelligent gateway is a new network device generated after the rise of the internet of things in recent years. Different from the router gateway in the internet era, besides the internet of things, the router gateway is also required to be compatible with various internet of things protocols and establish a network with interconnected devices. However, unlike the conventional router-like gateway, it also faces more protocol conversions and cannot completely rely on the internet (cloud) to implement various scene functions, because the internet of things needs to drive many local devices, and the delay requirement on the network is more strict. The intelligent gateway is provided with external interfaces such as a plurality of RS232 serial ports, an RS485 serial port, an RS422 serial port, a CAN port, a DI/DO port, a network port, an AI port and an IO port. When reading external interface data, the conventional method is to open a thread for each external interface and perform blocking data reading, the process is shown in fig. 1, the system switches between each thread in a polling manner, time overhead of a CPU is increased, and an intelligent gateway cannot timely receive and process the external interface data, which is an important problem to be solved by the intelligent gateway.

Disclosure of Invention

In order to solve the defects and shortcomings of the prior art, the multi-channel communication monitoring method based on the intelligent multi-channel gateway is provided, so that the interaction efficiency of a system and an external interface is improved, and the problem that the intelligent gateway cannot timely receive and process external interface data is effectively solved.

The invention provides a multi-channel communication monitoring method based on an intelligent multi-channel gateway, which comprises the following steps:

step 1, initializing each path of communication of the intelligent multi-path gateway, if the initialization is successful, storing a descriptor of each path of communication of the intelligent multi-path gateway, and entering step 2, otherwise, entering step 10;

step 2, establishing a descriptor set and initializing the descriptor set; if the descriptor set is created and initialized successfully, entering step 3, otherwise, entering step 10;

step 3, a thread is newly built and initialized; if the thread is created and initialized successfully, entering step 4, otherwise, entering step 10;

step 4, initializing the descriptor set in the step 2, and entering the step 5;

step 5, adding the descriptor of each channel of the initialized intelligent multi-channel gateway into a descriptor set in sequence, and entering step 6;

step 6, monitoring descriptors of each path of channels in a blocking mode, entering step 7 if normal data return exists, and otherwise, repeatedly executing step 10;

step 7, sequentially testing whether each channel is readable, if the data of the channel is readable, entering step 8, otherwise, entering step 9;

step 8, reading the data of the channel which can be read by the data in the step 7, calling a data processing function for processing, and entering the step 9 after the processing is finished;

step 9, judging whether all the current channels finish the reading and processing of the data, if so, entering step 4, otherwise, entering step 7;

and step 10, ending the software process and reporting the abnormal operation of the software.

The invention has the beneficial effects that:

compared with the prior art, the multi-channel communication monitoring method based on the intelligent multi-channel gateway simplifies the flow of receiving external interface data and reduces the expenditure of system resources; the interaction efficiency of the system and the external interface is improved, and the problem that the intelligent gateway cannot timely receive and process the external interface data is effectively solved.

Drawings

The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:

FIG. 1 is a flow chart of a conventional multi-channel communication monitoring software;

FIG. 2 is a software flow diagram of the present invention.

Detailed Description

As shown in fig. 1 and fig. 2, the present invention provides a multipath communication monitoring method based on an intelligent multipath gateway, which comprises the following specific steps:

step 1, calling a system interface open () to open each path of RS232 and RS422 serial ports of the intelligent multi-path gateway, and calling a tcsetattr () function to set parameters such as baud rate, data bits, check bits and stop bits of each path of serial ports; calling a system interface open () function to open each path of CAN port, and setting the working mode, frame data type, baud rate, shielding code and check code of each path of CAN port; calling a system interface to initialize each network port; setting a port number of each path of network communication; initializing each path of DI/DO port, AI port and IO port; if all external interfaces are initialized successfully, storing the descriptor of each external interface, and entering the step 2, otherwise, entering the step 10;

step 2, calling a system interface function FD _ set () to create a descriptor set, and calling a function FD _ ZERO () to initialize the descriptor set; if the descriptor set is created and initialized successfully, entering step 3, otherwise, entering step 10;

step 3, calling a function pthread _ create () to create a thread and initializing; if the thread is newly built and initialized successfully, entering step 4, otherwise, entering step 10;

step 4, calling a function FD _ ZERO () to initialize a descriptor set, and entering step 5;

step 5, calling a function FD _ SET () to sequentially add the descriptor of each path of initialized channel into a descriptor SET, and entering step 6;

step 6, calling a blocking function select () to monitor the communication of each channel in the descriptor set, if any channel has data, entering step 7, otherwise, repeatedly executing step 10;

step 7, calling a function FD _ ISSET () to sequentially test whether each path of channel has readable data, if so, entering a step 8, otherwise, entering a step 9;

step 8, calling a function read () to read the data of the channel, calling a data processing function for processing, and entering step 9 after the processing is finished;

step 9, judging whether all the current channels finish the reading and processing of the data, if so, entering step 4, otherwise, entering step 7;

and step 10, ending the software process and reporting the abnormal operation of the software.

The above embodiments are not limited to the technical solutions of the embodiments themselves, and the embodiments may be combined with each other into a new embodiment. The above embodiments are only for illustrating the technical solutions of the present invention and are not limited thereto, and any modification or equivalent replacement without departing from the spirit and scope of the present invention should be covered within the technical solutions of the present invention.

Claims (1)

1. A multipath communication monitoring method based on an intelligent multipath gateway is characterized in that: the method comprises the following steps:

step 1, initializing each path of communication of the intelligent multi-path gateway, if the initialization is successful, storing a descriptor of each path of communication of the intelligent multi-path gateway, and entering step 2, otherwise, entering step 10;

step 2, establishing a descriptor set and initializing the descriptor set; if the descriptor set is created and initialized successfully, entering step 3, otherwise, entering step 10;

step 3, a thread is newly built and initialized; if the thread is created and initialized successfully, entering step 4, otherwise, entering step 10;

step 4, initializing the descriptor set in the step 2, and entering the step 5;

step 5, adding the descriptor of each channel of the initialized intelligent multi-channel gateway into a descriptor set in sequence, and entering step 6;

step 6, monitoring descriptors of each path of channels in a blocking mode, entering step 7 if normal data return exists, and otherwise, repeatedly executing step 10;

step 7, sequentially testing whether each channel is readable, if the data of the channel is readable, entering step 8, otherwise, entering step 9;

step 8, reading the data of the channel which can be read by the data in the step 7, calling a data processing function for processing, and entering the step 9 after the processing is finished;

step 9, judging whether all the current channels finish the reading and processing of the data, if so, entering step 4, otherwise, entering step 7;

and step 10, ending the software process and reporting the abnormal operation of the software.

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