CN110958166A - Secondary equipment and information interaction method thereof - Google Patents
Secondary equipment and information interaction method thereof Download PDFInfo
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- CN110958166A CN110958166A CN201911137457.6A CN201911137457A CN110958166A CN 110958166 A CN110958166 A CN 110958166A CN 201911137457 A CN201911137457 A CN 201911137457A CN 110958166 A CN110958166 A CN 110958166A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40228—Modbus
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Abstract
The invention relates to secondary equipment and an information interaction method thereof, and belongs to the technical field of secondary equipment. The method comprises the following steps: the interface service process in the display terminal sends the received read/write command to the communication process, and the communication process generates the read/write command into a corresponding message and sends the message to the host through serial port communication; if the host receives the read command, reading a corresponding fixed value and sending the fixed value to a communication process; if the host receives the write command, judging whether the modified fixed value is within the threshold range of the fixed value, and sending a reply message of a judgment result to the communication process; and after receiving the reply message of the host, the communication process analyzes the reply message and displays the reply message through the interface service process. The invention realizes the information interaction in the display terminal through the interface service process and the communication process in the display terminal, and realizes the information interaction between the display terminal and the host through the serial port communication, so that the display terminal does not depend on a single host any more, and can be suitable for different host devices.
Description
Technical Field
The invention relates to secondary equipment and an information interaction method thereof, and belongs to the technical field of secondary equipment.
Background
In the field of industrial and power system protection control, field operators need to check the state of the secondary equipment, read or set the fixed value of the secondary equipment through a secondary equipment display terminal interface, and perform remote control, remote regulation and other operations.
Conventional secondary devices, for example: the devices in the field of industrial control and power system control are embedded devices, which generally include four parts, namely, an embedded microprocessor (CPU), peripheral hardware devices, an embedded operating system, and application programs of users, and are used to implement functions such as control, monitoring, or management of other devices. The liquid crystal display terminal and the device body share the CPU, and the data displayed by the liquid crystal display terminal is acquired by directly reading the global array of the device program, so that the display terminal often depends on the device body program, the performance and the resources are limited, and the adaptability is poor.
Disclosure of Invention
The application aims to provide an information interaction method of secondary equipment, which is used for solving the problem of poor adaptability of the existing method; still provide a secondary equipment simultaneously for solve the poor problem of current secondary equipment adaptability.
In order to achieve the above object, the present invention provides an information interaction method for a secondary device, comprising the following steps:
the interface service process in the display terminal receives the read/write command and sends the read/write command to the communication process, and the communication process generates the read/write command into a corresponding message and sends the corresponding message to the host through serial port communication;
if the host receives the reading command, reading a corresponding fixed value, and sending a reply message containing the fixed value to a communication process of the display terminal;
if the host receives the write command, judging whether the modified fixed value is within the threshold range of the fixed value, and sending a reply message containing a judgment result to a communication process of the display terminal;
after the communication process of the display terminal receives the reply message of the host through serial port communication, the reply message is analyzed, and the analyzed message is displayed through the interface service process.
The beneficial effects are that: the invention realizes the information interaction in the display terminal through the interface service process and the communication process in the display terminal, and realizes the information interaction between the display terminal and the host through the serial port communication, so that the display terminal does not depend on a single host any more, and can be suitable for different host devices.
Further, in order to realize the judgment of the writing command of the display terminal, the judgment result comprises the success of modification and the failure of modification; if the modified fixed value is within the threshold range of the fixed value, the modification is successful, the modified fixed value is stored in the host, and the successfully modified reply message is sent to the communication process of the display terminal; if the modified fixed value is not in the threshold range of the fixed value, the modification fails, and a reply message of the failed modification is sent to the communication process of the display terminal.
Further, in order to ensure the reliability of communication between the display terminal and the host, a modbus protocol is adopted for serial port communication.
Further, in order to realize information interaction between the interface service process and the communication process, information interaction is performed between the interface service process and the communication process in the display terminal in a message service mode.
Further, the menu information is not stored in the display terminal, so that the result displayed by the interface service process in the display terminal is released after the interface service process exits.
Furthermore, in order to avoid the conflict between the interface service process and the communication process, the priority of the communication process is higher than that of the interface service process.
In addition, the invention also provides a secondary device, which comprises a display terminal and a host which are separated, wherein the display terminal is connected with the host through a serial port device, the display terminal and the host both comprise controllers, each controller comprises a memory and a processor, and the processor is used for executing instructions stored in the memory to realize the following method:
the interface service process in the display terminal receives the read/write command and sends the read/write command to the communication process, and the communication process generates the read/write command into a corresponding message and sends the corresponding message to the host through serial port communication;
if the host receives the reading command, reading a corresponding fixed value, and sending a reply message containing the fixed value to a communication process of the display terminal;
if the host receives the write command, judging whether the modified fixed value is within the threshold range of the fixed value, and sending a reply message containing a judgment result to a communication process of the display terminal;
after the communication process of the display terminal receives the reply message of the host through serial port communication, the reply message is analyzed, and the analyzed message is displayed through the interface service process.
Has the advantages that: the secondary equipment of the invention separates the display terminal from the host, realizes the communication between the display terminal and the host through serial port communication, and realizes the information interaction in the display terminal through the interface service process and the communication process in the display terminal, so that the display terminal does not depend on a single host any more, and can be suitable for different host devices.
Further, in order to realize the judgment of the writing command of the display terminal, the judgment result comprises the success of modification and the failure of modification; if the modified fixed value is within the threshold range of the fixed value, the modification is successful, the modified fixed value is stored in the host, and the successfully modified reply message is sent to the communication process of the display terminal; if the modified fixed value is not in the threshold range of the fixed value, the modification fails, and a reply message of the failed modification is sent to the communication process of the display terminal.
Drawings
FIG. 1 is a schematic diagram of the interface service process and communication process information interaction with the device body of the present invention;
FIG. 2 is a functional block diagram of an interface service process of the present invention;
fig. 3 is a functional structure diagram of a communication process for communicating with the device body according to the present invention.
Detailed Description
Secondary equipment embodiment:
the secondary device provided by the embodiment includes a display terminal and a host (i.e., a device body) which are separated from each other, the display terminal is connected with the host through a serial port device, the display terminal and the host both include controllers, each controller includes a processor and a memory, and the processor is used for executing instructions stored in the memory to implement an information interaction method of the secondary device. The serial port device realizes information interaction with the device body through serial port communication, and finishes browsing or setting of all menus.
The memory of the display terminal stores interface service process and communication process of communicating with the device body. The interface service process is mainly responsible for lighting the LED lamp, processing messages, responding to key operation and displaying pictures; the communication process is mainly responsible for the tasks of message processing and communication with the device body (namely serial port message processing), organizes and issues a message to the device body when receiving a read or write message command of the interface service process, and analyzes the message and sends the message to the interface service process when receiving the message of the device body.
The menu of the secondary equipment display terminal is divided into a browsing menu and a setting menu according to the processing level of the interface service, and the browsing menu only needs to read the quantity value such as remote measurement, remote signaling, a report menu and the like (namely, a reading command); the tuning class menu needs to support modification operations such as setpoints, platens, parameters, time setting menus, etc. (i.e., write commands) in addition to reading the magnitude.
Specifically, the browsing class menu: the interface service process informs the communication process in a message service mode and needs to read corresponding menu information from the host; setting a class menu: the interface service process informs the communication process in a message service mode, the menu value information needs to be read and displayed, if the menu data is modified, after the data is modified and the password is input and the confirmation key is pressed for operation, the interface service process informs the device body through the communication process, the device body judges whether the modification is legal or not, and the judgment result is displayed on the display terminal through the interface service process.
The specific implementation process of the information interaction method of the secondary device is shown in fig. 1, fig. 2, and fig. 3, and includes the following steps:
displaying the corresponding menu operation of an interface service process in the terminal, receiving a read/write command, sending the read/write command to a communication process, generating a corresponding message from the read/write command by the communication process, and sending the corresponding message to a host through serial port communication;
if the host receives the reading command, reading a corresponding fixed value, and sending a reply message containing the fixed value to a communication process of the display terminal;
if the host receives the write command, judging whether the modified fixed value is within the threshold range of the fixed value, and sending a reply message containing a judgment result to a communication process of the display terminal;
after the communication process of the display terminal receives the reply message of the host through serial port communication, the reply message is analyzed, and the analyzed message is displayed through the interface service process.
In this embodiment, the judgment result of the host during the command writing includes success and failure of modification; if the modified fixed value is within the threshold range of the fixed value, the modification is successful, the modified fixed value is stored in the host, and the successfully modified reply message is sent to the communication process of the display terminal; if the modified fixed value is not in the threshold range of the fixed value, the modification fails, and a reply message of the failed modification is sent to the communication process of the display terminal. As another embodiment, only the success or failure of modification may be displayed when displaying, and since these two determination results are mutually contradictory, the display terminal may display only one of the determination results within a set time.
In this embodiment, the information interaction between the interface service process and the communication process is performed in a message service manner, which specifically includes: when information is exchanged between two processes, only the pointer of the data buffer needs to be sent or read. As another embodiment, a message queue, a global variable, or the like may be used.
In this embodiment, to avoid the conflict, the priority of the communication process task is higher than that of the interface service process task, and when there is a communication task, the communication task is processed first. In other embodiments, the interface service process may be processed first.
In this embodiment, the secondary device display terminal does not store the menu information, reads the menu information from the device body through serial port communication after entering a certain menu in response to the key operation, and immediately releases the menu information when exiting the menu in response to the key operation. As another embodiment, the menu information may also be stored, which is not limited by the present invention.
The menu data information interaction mode between the secondary equipment display terminal and the device body is serial port communication, menu contents in the secondary equipment display terminal are read from the device body, and the menu contents are modified by the secondary equipment display terminal, transmitted to the device body and stored in the device body. In the embodiment, the serial port communication adopts a modbus protocol, and by utilizing the expandable characteristic of the modbus protocol, the menu types can be classified according to classes (browsing class menus and setting class menus), the message function codes of the same class of menus are the same, and the message formats of the same function codes are the same, so that the message issuing and the message analysis are simple and convenient. As another embodiment, another specification such as the 103 specification or the CDT specification may be adopted.
The specific operation is as follows:
1. when the response key operation of the secondary equipment display terminal enters a certain browsing type menu screen, the interface service process receives a message reading command of the menu and sends a message of the reading command (reading menu content information) to the communication process;
2. after receiving the read command message sent by the interface service process, the communication process organizes and sends a serial port message for reading menu content information and sends the serial port message to the device body;
3. after receiving the serial port message, the device body organizes corresponding menu information and sends the serial port message to a communication process of a secondary equipment display terminal;
4. after receiving and analyzing the reply message of the device body, the communication process of the secondary equipment display terminal sends a message command capable of reading information to the picture processing task;
5. the processing picture task receives the analyzed message and refreshes and displays the corresponding magnitude information of the menu;
6. when the response key operation of the secondary equipment display terminal enters a setting menu screen, the interface of the secondary equipment display terminal modifies the fixed value and inputs a correct password, and then the interface service process sends a writing command message to the communication process, and the menu content is modified.
7. After the communication process receives the writing command message of the interface service process, the communication process organizes the content information serial port message of the writing menu and sends the serial port message to the device body, wherein the serial port message comprises the modified constant value quantity.
8. After the device body receives the serial port message, whether the modified constant value quantity is within the range of the upper limit and the lower limit of the constant value is judged: if the communication progress is within the range, recording the modified constant value quantity, and sending a modification confirmation message to the communication progress of the secondary equipment display terminal; and if the communication process is not within the range, sending an abnormal response message to the communication process of the secondary equipment display terminal.
9. And after receiving the reply message of the device body, the communication process analyzes the reply message and sends a message to the picture processing task, wherein the message content is information about successful modification or failed modification.
10. After receiving the message, the processing picture task displays a modification result picture to prompt the success or failure of modification.
The secondary equipment of the invention separates the display terminal from the host, realizes the communication between the display terminal and the host through serial port communication, and realizes the information interaction in the display terminal through the interface service process and the communication process in the display terminal, so that the display terminal does not depend on a single host any more, and can be suitable for different host devices.
The embodiment of the information interaction method of the secondary equipment comprises the following steps:
the information interaction method for the secondary device is characterized by comprising the following steps:
the interface service process in the display terminal receives the read/write command and sends the read/write command to the communication process, and the communication process generates the read/write command into a corresponding message and sends the corresponding message to the host through serial port communication;
if the host receives the reading command, reading a corresponding fixed value, and sending a reply message of the fixed value to a communication process of the display terminal;
if the host receives the write command, judging whether the modified fixed value is within the threshold range of the fixed value, and sending a reply message of a judgment result to a communication process of the display terminal;
after the communication process of the display terminal receives the reply message of the host through serial port communication, the reply message is analyzed, and the analyzed message is displayed through the interface service process.
The specific implementation process of the information interaction method of the secondary device is already described in the above-mentioned embodiment of the secondary device, and is not described herein again.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (8)
1. An information interaction method of secondary equipment is characterized by comprising the following steps:
the interface service process in the display terminal receives the read/write command and sends the read/write command to the communication process, and the communication process generates the read/write command into a corresponding message and sends the corresponding message to the host through serial port communication;
if the host receives the reading command, reading a corresponding fixed value, and sending a reply message containing the fixed value to a communication process of the display terminal;
if the host receives the write command, judging whether the modified fixed value is within the threshold range of the fixed value, and sending a reply message containing a judgment result to a communication process of the display terminal;
after the communication process of the display terminal receives the reply message of the host through serial port communication, the reply message is analyzed, and the analyzed message is displayed through the interface service process.
2. The information interaction method of the secondary device according to claim 1, wherein the determination result includes a modification success and a modification failure; if the modified fixed value is within the threshold range of the fixed value, the modification is successful, the modified fixed value is stored in the host, and the successfully modified reply message is sent to the communication process of the display terminal; if the modified fixed value is not in the threshold range of the fixed value, the modification fails, and a reply message of the failed modification is sent to the communication process of the display terminal.
3. The information interaction method of the secondary equipment according to claim 1 or 2, wherein the serial port communication adopts a modbus protocol.
4. The information interaction method of the secondary device according to claim 1 or 2, wherein information interaction is performed between an interface service process and a communication process in the display terminal in a message service manner.
5. The information interaction method of the secondary device according to claim 1 or 2, wherein a result displayed by the interface service process in the display terminal is released after the interface service process exits.
6. The information interaction method of the secondary device according to claim 1 or 2, wherein the communication process has a higher priority than the interface service process.
7. A secondary device is characterized by comprising a display terminal and a host which are separated from each other, wherein the display terminal is connected with the host through a serial port device, the display terminal and the host respectively comprise controllers, each controller comprises a memory and a processor, and the processor is used for executing instructions stored in the memory to realize the following method:
the interface service process in the display terminal receives the read/write command and sends the read/write command to the communication process, and the communication process generates the read/write command into a corresponding message and sends the corresponding message to the host through serial port communication;
if the host receives the reading command, reading a corresponding fixed value, and sending the reply message containing the fixed value to a communication process of the display terminal;
if the host receives the write command, judging whether the modified fixed value is within the threshold range of the fixed value, and sending a reply message containing a judgment result to a communication process of the display terminal;
after the communication process of the display terminal receives the reply message of the host through serial port communication, the reply message is analyzed, and the analyzed message is displayed through the interface service process.
8. The secondary device according to claim 7, wherein the determination result includes a modification success and a modification failure; if the modified fixed value is within the threshold range of the fixed value, the modification is successful, the modified fixed value is stored in the host, and the successfully modified reply message is sent to the communication process of the display terminal; if the modified fixed value is not in the threshold range of the fixed value, the modification fails, and a reply message of the failed modification is sent to the communication process of the display terminal.
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| CN201911137457.6A CN110958166A (en) | 2019-11-19 | 2019-11-19 | Secondary equipment and information interaction method thereof |
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| CN201911137457.6A CN110958166A (en) | 2019-11-19 | 2019-11-19 | Secondary equipment and information interaction method thereof |
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Cited By (1)
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| CN114036080A (en) * | 2021-11-09 | 2022-02-11 | 许昌许继软件技术有限公司 | Method and device for upgrading program by using communication serial port of display terminal |
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