WO2022267578A1

WO2022267578A1 - Reconfigurable multi-thread-parallelism upper computer system based on can communication

Info

Publication number: WO2022267578A1
Application number: PCT/CN2022/082174
Authority: WO
Inventors: 陈健斌; 杨程喻; 邹建俊
Original assignee: 广东泰坦智能动力有限公司
Priority date: 2021-06-24
Filing date: 2022-03-22
Publication date: 2022-12-29
Also published as: CN113407214A; CN113407214B

Abstract

The present invention relates to a reconfigurable multi-thread-parallelism upper computer system based on CAN communication. The system comprises a primary thread, and secondary threads, which are connected to the primary thread. The primary thread comprises starting a CAN device, initializing the CAN device, transmitting and receiving a CAN message, restarting the CAN device, and changing the settings of the CAN device. The running state of the primary thread is determined by means of a running state enumeration in an enumeration-type variable. The data type of the running state enumeration is a nameable set of integer constants to express different running states of the primary thread. The running state enumeration has four values: Init, Run, Wait and Exit. In different running state enumerations, the primary thread enters different states to run, and the running state enumeration may be updated according to the situation, such that the primary thread enters a designated running state in the next primary thread loop. The present invention has the advantages of effectively improving the running efficiency of an upper computer program, and reducing the fault probability.

Description

A Reconfigurable Multithread Parallel Host Computer System Based on CAN Communication

technical field

The invention relates to the technical field of circuit systems, in particular to a reconfigurable multi-thread parallel upper computer system based on can communication.

Background technique

The role of the upper computer is mainly to monitor various characterization parameters, operating status and working mode of the digital power supply online in real time, and it can also control the digital power supply system. In the past, when there was no such host computer software based on virtual instrument technology, people used traditional instruments to complete the monitoring and control of the circuit system.

The upper computer software can transmit data, realize the parameter setting of the digital power supply, online calibration and logic test. In the past, when people were debugging this type of power supply system, they often needed to use many test instruments to carry out hardware debugging work, so as to know the operating status of the circuit and other information in real time. There are a large number of such instruments, which are inconvenient to read and store, and direct coupling from the outside into the power system will introduce unknown interference. These problems will greatly hinder the research and development work.

In addition, when debugging the software, some relevant parameters of the control model need to be modified and verified. For example, the traditional PID control needs to adjust the control parameters such as proportional coefficient/integral coefficient/differential coefficient and observe its working status, and use this as a criterion for software debugging. Since the control strategy and parameters cannot be modified online and in real time, for the digital power module, the program needs to be reprogrammed every time the control parameters are modified. For traditional power modules, changing the parameters of the control loop means that the parameters of the components of the hardware circuit may need to be modified.

During use, it is also necessary to monitor the real-time operating status of the circuit, adjust and modify the output parameters. In the past, people had to monitor the real-time operation status of the circuit and needed a variety of instruments embedded in the circuit system. When there are many parameters to be monitored, this type of instrument often appears that the human-computer interaction experience is not smooth enough, its appearance is not beautiful enough, and the system operation is not simple/light/free.

Contents of the invention

The technical problem to be solved by the present invention is to solve the above problems and provide a reconfigurable multi-threaded parallel host computer system based on CAN communication that effectively improves the operating efficiency of host computer programs and reduces failure probability.

In order to solve the above technical problems, the technical solution provided by the present invention is: a reconfigurable multi-threaded parallel upper computer system based on can communication, characterized in that: it includes a main thread and a secondary thread connected with the main thread, the main thread The thread includes opening the CAN device, initializing the CAN device, transmitting and receiving CAN messages, restarting the CAN device, and changing the settings of the CAN device. The main thread is a state machine mode of a parallel program that performs CAN communication in an orderly and elegant manner. , the running state is determined by the running state enumeration in an enumeration variable, and the data type of the running state enumeration is a collection of integer constants that can be named to express different running states of the main thread. The state enumeration has four values: Init, Run, Wait, and Exit. The enumeration enters different states to run in different running states. At the same time, the running state enumeration will be updated according to the situation, and then enter the specified running state in the next main thread cycle. , the main thread includes the following steps:

S1, judging the value of the running status enumeration, judging whether the running status enumeration is Exit, judging that the running status enumeration is Exit, then ending the program, judging the running status enumeration complementing Exit, then entering the judgment running status enumeration value;

S2, the value of running status enumeration in step S1 includes Init, Run, Wait and Exit,

S3, described Init comprises the following steps:

a1. Bundle the CAN configuration information into the CAN communication standard cluster by name,

a2. Create user event CANOpen,

a3. Reinsert the new CAN communication standard cluster into the main thread data stream,

a4. Insert the event into the event data stream of the main thread, enumerate the running status and assign the Wait value;

The Wait includes the update of the event structure generated from the user event, and the update of the event structure generated from the user event includes a parallel Open value change event and other value change events, and the parallel Open value change event opens the CAN step. Three subVI programs are respectively the Open subVI program, the Init subVI program, the Start subVI program, and the change events of other values include binding specific information values in the CAN communication standard cluster to other values changed by name, The parallel Open value change event includes judging the event data flow, enumerating the running state and assigning Run and Wait values;

Described Run comprises the following steps:

b1, the event structure, the event structure includes the UpdateUIEvent generated from the front panel button control and the user event data flow,

b2. When the CAN sending subroutine is called for the corresponding control event to convert the packaged CAN communication standard cluster into a CAN message,

b3. Send CAN message,

b4. When it is user data and user event data flow UpdateUIEvent, it corresponds to the Disablie assignment of the Event attribute node, then judges the event data flow, and finally enumerates the running status and assigns the Run value.

b5, step b3 and step b4, when the final running state enumerations are all assigned Run and Wait values, the main thread enters the next cycle;

Said Exit comprises the following steps:

c1. Cancel the registration event, cancel the user event and unbind the corresponding data from the CAN communication standard cluster by name,

c2, turn off the CAN device, the running state enumeration is given Exit value, then end the program;

The secondary thread includes a receiving thread, a loop sending query message thread, an output parameter modification thread, and a calibration high and low parameter modification thread,

The running process of the receiving thread comprises the following steps:

F1. First judge whether the state of the main thread is open. If the state of the main thread is open, call the subVI.

F2. Convert the format of the received CAN message into a CAN communication standard cluster by calling the CAN secondary library. Otherwise, it is judged that CAN is open, and the delay is 50ms.

F3, after obtaining the CAN communication standard cluster, judge whether it is empty information, if not empty information, then continue to operate, the message is analyzed and translated;

The function of the loop sending query message thread is to obtain and update various operating parameters and mode status data of the digital power module in time, and the operation process includes the following steps:

T1. After entering the loop to send the query message thread, judge the state of the main thread, and then through a parallel program block diagram that automatically generates polling parameters according to the protocol, obtain the data frame and combine it into a character string of the data frame for the query.

T2. Next, judge the state of the main thread, enter a sending program block diagram independent of the main thread,

T3. Finally, judge the state of the main thread and update the data of the multi-column list box.

T4. To update the data of the multi-column list box, it is necessary to judge that the queued number of data frames does not exceed 500, then judge whether to clear the multi-column list box, and finally update the received data to the multi-column list box control,

The output parameter modification thread is to modify various operating parameters and mode status data of the digital power module, and the operation process includes the following steps:

W1. After entering the output parameter modification thread, first judge the parameter setting enumeration, then add the corresponding program branch to synthesize the string used in the output message, and transmit this data to the main thread, and trigger the key event of the main thread ,

W2. At the same time, there is a parallel program of a dialog box that is executed in this secondary thread.

W3. In addition to message synthesis, it will also judge the enumerated variables generated by the drop-down selection control, and generate corresponding prompt information to prompt the user to input the corresponding parameter range;

The function of the calibration high and low parameter modification thread is to calibrate the digital power module, and the operation process includes the following steps:

X1. To judge the enumeration of the numerical input control of "calibration high and low setting" and the numerical input control of "calibration setting", respectively, and then count them into the corresponding program branch respectively,

X2. Then read the data of the data control in the corresponding program branch and synthesize the data frame, and output the string of calibration parameters.

X3. Press the send button on the current panel, and the main thread enters the corresponding event branch to receive the string and send the CAN message.

After adopting the above structure, the present invention has the following advantages: the present invention system is a kind of CAN host computer software for digital power supply module, is written by a kind of graphical high-level programming language labview, and the characteristics of the present invention are:

1. Multi-threading is composed in a serial-parallel hybrid manner, while avoiding data competition risks.

2. Reconfigurable design can be carried out according to the required functions, and the number and composition of threads can be increased or decreased according to actual needs.

3. Adaptable and reconfigurable design can be carried out according to the protocol content and actual hardware, and adapt to different digital power systems by replacing the protocol interpretation method and secondary library.

4. One master and multiple slave software architecture to improve the stability of the upper computer system,

5. The main thread is a state machine mode of a parallel program that can perform CAN communication in an orderly and elegant manner.

The main thread of the present invention is the only program thread that will run all the time during the entire use process of the entire program. Other program threads will decide whether to run according to information such as running state enumeration and intermediate quantity status. This "one main thread runs all the time, The multi-thread mode of "intermittent operation of multiple sub-threads" can effectively improve the operating efficiency of the host computer program and reduce the probability of failure.

As an improvement, the main thread is in the Init state. The main function of the main thread is to open the CAN device and initialize it. The specific operations include decomposing and rebinding the CAN communication standard cluster, and generating UI by calling attribute nodes and dynamic registration events. Update the event UpdateUIEvent, so as to update the CAN communication standard cluster and adjust the state of the UI data in time. At the same time, assign Wait to the running state enumeration, so that the main thread enters the Wait mode.

As an improvement, the main thread is in the Wait state. The main function of the main thread is to wait for the CAN device to be ready, and judge the operation status of the CAN device to determine which main thread state to enter next and update the information in the CAN communication standard cluster. Wait The main thread in the state is a program with an event structure, and the event types of the event structure mainly include changes in specific information values in the CAN communication standard cluster and front panel closing events.

As an improvement, when the main thread is in the Run state, the main function of the main thread is to judge and receive data from each sub-thread, and pack these data into a CAN communication standard cluster, and call the CAN sending subroutine to convert the packaged CAN communication standard Clusters are converted into CAN messages and sent out.

As an improvement, the main thread is in the Wait state. The main function of the main thread is to wait for the CAN device to be ready, and judge the operation status of the CAN device to determine which main thread state to enter next and update the information in the CAN communication standard cluster.

As an improvement, the secondary thread also includes threads for calibration reset, identification, module serial number setting parameter modification, module state information separation and display, logic variable output, and power module on/off.

Description of drawings

Fig. 1 is a schematic diagram of the program function of the main thread of a reconfigurable multi-threaded parallel upper computer system based on can communication in the present invention.

Fig. 2 is a program block diagram of the main thread of a reconfigurable multi-threaded parallel upper computer system based on can communication in the present invention.

Fig. 3 is a program block diagram of a receiving thread of a reconfigurable multi-threaded parallel upper computer system based on can communication in the present invention.

Fig. 4 is a program block diagram of a reconfigurable multi-threaded parallel upper computer system based on can communication in the present invention, which is a thread program for cyclically sending inquiry messages.

Fig. 5 is a program block diagram of an output parameter modification thread of a reconfigurable multi-threaded parallel upper computer system based on can communication in the present invention.

Fig. 6 is a program block diagram of a reconfigurable multi-threaded parallel upper computer system based on can communication in the present invention to modify the high and low parameters of the calibration thread.

detailed description

The present invention will be described in further detail below in conjunction with the accompanying drawings.

Combining all the drawings, a reconfigurable multi-threaded parallel upper computer system based on can communication, including a main thread and multiple secondary threads connected to the main thread, the main thread includes opening the CAN device, initializing the CAN device, CAN message transmission and reception, CAN device restart, CAN device setting change, the running state of the main thread is determined by the running state enumeration in an enumeration variable, and the data type of the running state enumeration is a kind of A collection of named integer constants to express the different running states of the main thread. The running state enumeration has four values: Init, Run, Wait, and Exit. In different running states, the enumeration enters different states and runs at the same time. Update the running state enumeration according to the situation, and then enter the specified running state in the main thread cycle next time, and the main thread includes the following steps:

S3, described Init comprises the following steps:

a2. Create user event CANOpen,

Described Run comprises the following steps:

b1, the event structure, the event structure includes the UpdateUIEvent generated from the front panel button control and the user event data stream,

b3. Send CAN message,

Said Exit comprises the following steps:

The running process of the receiving thread comprises the following steps:

The main thread is in the Init state. The main function of the main thread is to open the CAN device and initialize it. The specific operations include decomposing and rebinding the CAN communication standard cluster, and generating UI update events UpdateUIEvent by calling attribute nodes and dynamic registration events , so as to update the CAN communication standard cluster and adjust the state of UI data in time, and at the same time, assign a value to Wait for the running state enumeration, so that the main thread enters the Wait mode.

The main thread is in the Wait state. The main function of the main thread is to wait for the CAN device to be ready, and judge the operation state of the CAN device to determine which main thread state to enter next and to update the information in the CAN communication standard cluster. The main thread is a program with an event structure, and the event types of the event structure mainly include changes in specific information values in the CAN communication standard cluster and front panel closing events.

When the main thread is in the Run state, the main function of the main thread is to judge and receive data from each sub-thread, and pack these data into CAN communication standard clusters, and call the CAN sending subroutine to convert the packaged CAN communication standard clusters into The CAN message is sent out.

When the main thread is in the Wait state, the main function of the main thread is to wait for the CAN device to be ready, and judge the operation status of the CAN device to determine which main thread state to enter next and to update the information in the CAN communication standard cluster.

The secondary thread also includes threads for calibration reset, identification mark synthesis, module serial number setting parameter modification, module state information separation and display, logic variable output, and power module power on/off.

When the present invention was implemented, under the Init state, the main function of the main thread was to open the CAN device and initialize it. The specific operation includes decomposing and re-bundling the CAN communication standard cluster, such as overwriting the CAN configuration information decomposed from the CAN communication standard cluster, and then bundling it back into the CAN communication standard cluster by name, by calling attribute nodes and dynamically registering events To generate a UI update event (English name UpdateUIEvent), so as to update the CAN communication standard cluster and adjust the state of the UI data in time. At the same time, assign a value of "Wait" to the "running state enumeration" to let the main thread enter the Wait mode.

In the Wait state, the main function of the main thread is to wait for the CAN device to be ready, and judge the operation state of the CAN device to determine which main thread state to enter next and update the information in the CAN communication standard cluster. The main thread in the Wait state is a program with an event structure, which is similar to an interrupt event. It is a programming structure that emphasizes real-time performance. The programming structure of the corresponding program will be executed only when the corresponding event occurs, and the event of the event structure The types mainly include the change of specific information value in the CAN communication standard cluster and the closing event of the front panel, a total of ten event types. In addition to the open value change event in the CAN communication standard cluster, the change of specific information values in other CAN communication standard clusters is just to replace the corresponding parameters in the CAN communication standard cluster, and then generate the corresponding UI update event (English name UpdateUIEvent ).

Among them, it is necessary to focus on describing the open event of the Wait state of the main thread. This part of the program is used to successfully open the CAN device after performing specific steps on the CAN device after the initialization of the CAN device is completed. The usual steps are to execute three subVI programs in sequence, namely 1.Open, 2.Init, and 3.Start, and judge whether the execution is successful. In addition, this part also needs to generate corresponding user events to regulate the entire multi-threaded system to improve the reliability of the system. And judge the assignment of "running state enumeration" according to the execution effect. If the CAN device is not successfully opened, it will stay in the Wait state. If the CAN device is successfully opened, the "running state enumeration" will be assigned a value of Run.

In the Run state, the main function of the main thread is to judge and receive data from each sub-thread, and pack these data into CAN communication standard clusters defined in the present invention, and call CAN to send subroutines to pack CAN communication standard clusters. Clusters are converted into CAN messages and sent out. The program is a programming structure of an event structure, and the operation of the program can be triggered by an event such as "a certain key is pressed". For example, when the event of "pressing the output parameter button" occurs, the corresponding program flow is entered, and the data frame (data frame that has been converted into a string) from the output parameter secondary thread is packaged into a CAN communication standard cluster, Then it is converted into a CAN message and sent out. In addition, the occurrence of a "timeout event" will allow the main thread to continue running in the Run state. Finally, if a CAN shutdown command is received (the command may come from the shutdown button on the front panel or the shutdown of the CAN device), it will enter the "CAN shutdown event". The specific operation is to call the CAN shutdown subfunction and update the corresponding user event and A UI update event (English name UpdateUIEvent) is generated.

In addition to the above operations, the main thread will also update some corresponding user events and generate UI update events (English name UpdateUIEvent). These events (Event, which is a way to describe the data flow of parallel programs, and are generally used to coordinate the parallel operations of multiple threads) control the running status of other sub-threads and transmit data with other sub-threads. In this way, the purpose of coordinating the operation of multiple threads is achieved, and the parallel operation of the program is realized.

Next, we will introduce each secondary thread. These threads will enter the corresponding operating state according to the "running state enumeration" operated by the main thread, and execute the corresponding program.

Receiving thread: Combined with Figure 3, in order to receive and analyze messages from the digital power module in a timely manner, a thread that receives CAN messages and translates CAN messages is needed. The secondary thread used in the present invention to realize this function is the "receiving thread".

The running process of the secondary thread "receiving thread": first judge whether the state of the main thread is open, if the state of the main thread is open, then call the sub VI "VCI_Recieve", and call the CAN secondary library to receive the CAN message Format conversion to the CAN communication standard cluster. On the contrary, it is judged that CAN is open, and the delay is 50ms. After getting the CAN communication standard cluster, judge whether it is empty information. If it is not an empty message, proceed to the operation shown in the program block diagram to parse and translate the message.

Circular sending query message thread: In combination with Figure 4, in order to obtain and update various operating parameters and mode status data of the digital power module in time, a thread that polls and sends query CAN messages is needed. The secondary thread used to realize this function in the present invention is "circularly sending query message thread", and the program structure of "cyclically sending query message thread" is a flat sequence structure (English name flat sequence), that is, a method according to a specified order Execute the program structure of the corresponding program frame (English name frame). The cyclic sending inquiry message thread of the present invention has used three program frames, is respectively: the character string (order 0) of the data frame of synthesizing inquiry, sending inquiry message (order 1) and updating multi-column list box data (order 2 ).

After entering the "loop sending query message thread", first judge the state of the main thread, and then through a parallel program block diagram that automatically generates polling parameters according to the protocol, obtain the data frame and combine it into the character of the data frame for query string. Then, judge the state of the main thread, and enter a sending program block diagram independent of the main thread. Finally, it is to judge the state of the main thread and update the data of the multi-column list box. Updating the multi-column list box data requires judging that the queued number of data frames (frame number) does not exceed 500, and then judging whether to clear the multi-column list box, and finally updating the received data to the multi-column list box control.

Adding a program to update multi-column list box data in the loop sending query message thread can avoid the competition-adventure effect of its data flow (similar to the competition-adventure effect of digital circuits, this phenomenon also occurs in parallel programs. After the same data is transmitted through the data streams of different threads, the time to arrive at a certain meeting point in the network is different, and some data errors will occur), so as to improve the reliability of the system.

The program structure of the output parameter modification thread is a conditional structure (English name case structure). Combined with Figure 5, first judge the enumeration variable generated by the drop-down selection control of the front panel control, then add the corresponding program branch (English name case), synthesize the corresponding output string according to the communication protocol, and convert this string Passed to the sender of the main process. Finally, the main process completes the process of CAN sending, which can avoid problems such as hardware conflicts of CAN devices.

After entering the "output parameter modification thread", first judge the "parameter setting" enumeration, then add the corresponding program branch (case) to synthesize the string used in the output message, and transmit this data to the main thread, and trigger The key event of the main thread (Event, which requires the key control on the front panel to be pressed to start). At the same time, a parallel program of a dialog box is executed in this secondary thread. In addition to message synthesis, it also judges the enumeration variable generated by the drop-down selection control, and generates corresponding prompt information to prompt the user for the input range of the corresponding parameter.

The program structure of "calibration high and low parameter modification thread" is a conditional structure (English name case structure). Combined with Figure 6, the enumerations of "calibration high and low settings" and "calibration settings" will be judged respectively, and then calculated Enter the corresponding program branch (English name case). Then read the data control and synthesize the data frame in the corresponding program branch, and output the string of calibration parameters. Press the send button on the current panel, and the main thread enters the corresponding event branch to receive this character string, and send the CAN message.

So far, several main threads of the present invention have been introduced, and these threads can already satisfy some conventional monitoring and control of the digital power supply module. In addition, in order to increase the usability of the upper computer system mentioned in the present invention, other sub-threads can also be added according to the functional requirements of the digital power module, such as "calibration reset", "identification", "module serial number setting parameter Sub-threads such as "modification", "separation and display of module status information", "logic variable output" and "power module on and off" can all be used in this way to increase the functions of the host computer.

In a word, the present invention has the following advantages:

Reconfigurability: The parallel software structure of the present invention can increase or decrease all secondary threads at will according to specific needs, and construct suitable host computer software according to needs. Moreover, by configuring and transmitting information such as running status enumeration and intermediate quantity status, the effect of coordinated operation of each thread is achieved.

Downward compatibility: the present invention can realize the connection with different CAN devices by accessing different secondary libraries, and has a wide tolerance for hardware downwards.

Serial-parallel coordination: Combining certain threads is collectively called a flat sequence structure (English name flat sequence) to eliminate risky competition. In the actual design process, several single-function threads can be properly combined in series and parallel, some threads are in a serial relationship with each other, and some threads are in a parallel relationship with each other. This serial-parallel coordination helps to improve the robustness and reliability of the system.

A reconfigurable method in which multiple threads are connected in series and parallel: According to the actual power module requirements, different types of sub-threads can be arranged in series or in parallel for reconfiguration. Among them, it is necessary to carry out program construction in a serial manner for the multiple sub-threads containing "data streams that may cause competition hazards" (the specific program construction method is to organize these sub-threads with data conflicts in a flat sequential structure (English name flat sequence) to be reconstructed so that they proceed in order to eliminate the risk of data stream competition), and the sub-threads that have no data conflicts between each other can be constructed in parallel with each other. All threads are then intermingled with each other in both serial and parallel connections. In the actual design process, several single-function threads can be properly combined in series and parallel, some threads are in a serial relationship with each other, and some threads are in a parallel relationship with each other. This serial-parallel coordination helps to improve the robustness and reliability of the system.

Since different CAN hardware devices may require different operation methods (the timing of turning on the device level, the timing of turning off the device level and the reflection matching impedance may be different), so different handling methods are required for different CAN devices. The present invention can realize the connection with different CAN devices by accessing different secondary libraries, and has wide inclusiveness to hardware downwards.

Reconfigurability of the type and quantity of sub-threads: the parallel software structure of the present invention can increase or decrease all sub-threads at will according to specific needs, and construct suitable host computer software according to needs. Moreover, by configuring and transmitting information such as running status enumeration and intermediate quantity status, the effect of coordinated operation of each thread is achieved. This kind of reconfigurability has the characteristics of "one master and multiple slaves", that is, one main thread works continuously, multiple secondary threads work intermittently, and all threads work in the above-mentioned "serial-parallel hybrid mode".

Principle of work of the present invention: all threads, comprise a main thread and multiple sub-threads all share a CAN communication standard cluster, all threads can read/write to this CAN communication standard cluster, the CAN communication standard cluster defined by the present invention is Defined according to the existing electric vehicle on-board conductive charger standard CAN communication protocol, including identifier system type, source address, destination address, command type, data, standard frame/remote frame flag, data length frame and channel type, etc. and other data, and these plural types of data are re-bundled to form a cluster. A cluster is a data structure, similar to a structure variable in C language.

The present invention and its embodiments have been described above, but this description is not limiting, and the actual structure is not limited thereto. In a word, if a person of ordinary skill in the art is inspired by it, without departing from the purpose of the invention, without creatively designing a structural method and embodiment similar to the technical solution, it shall belong to the protection of the present invention. scope.

Claims

A reconfigurable multi-threaded parallel upper computer system based on CAN communication, characterized in that: it includes a main thread and a secondary thread connected to the main thread, and the main thread includes opening CAN equipment, initializing CAN equipment, and CAN message transmission and receiving, restarting CAN equipment, and changing CAN equipment settings, the main thread is a state machine mode of a parallel program that performs CAN communication in an orderly and elegant manner, and the running state is enumerated by the running state in an enumerated variable To decide, the data type of the running state enumeration is a collection of integer constants that can be named to express the different running states of the main thread. The running state enumeration has four values: Init, Run, Wait and Exit, the enumeration in different running states enters different states to run, and will update the running state enumeration according to the situation at the same time, and then enter the specified running state in the next main thread cycle. The main thread includes the following steps:

S1, judging the value of the running status enumeration, judging whether the running status enumeration is Exit, judging that the running status enumeration is Exit, then ending the program, judging the running status enumeration complementing Exit, then entering the judgment running status enumeration value;

S2, the value of running status enumeration in step S1 includes Init, Run, Wait and Exit,

S3, described Init comprises the following steps:

a1. Bundle the CAN configuration information into the CAN communication standard cluster by name,

a2. Create user event CANOpen,

a3. Reinsert the new CAN communication standard cluster into the main thread data stream,

a4. Insert the event into the event data stream of the main thread, enumerate the running status and assign the Wait value;

The Wait includes the update of the event structure generated from the user event, and the update of the event structure generated from the user event includes a parallel Open value change event and other value change events, and the parallel Open value change event opens the CAN step. Three subVI programs are respectively the Open subVI program, the Init subVI program, the Start subVI program, and the change events of other values include binding specific information values in the CAN communication standard cluster to other values changed by name, The parallel Open value change event includes judging the event data flow, enumerating the running state and assigning Run and Wait values;

Described Run comprises the following steps:

b1, the event structure, the event structure includes the UpdateUIEvent generated from the front panel button control and the user event data flow,

b2. When the CAN sending subroutine is called for the corresponding control event to convert the packaged CAN communication standard cluster into a CAN message,

b3. Send CAN message,

b4. When it is user data and user event data flow UpdateUIEvent, it corresponds to the Disablie assignment of the Event attribute node, then judges the event data flow, and finally enumerates the running status and assigns the Run value.

b5, step b3 and step b4, when the final running state enumerations are all assigned Run and Wait values, the main thread enters the next cycle;

Said Exit comprises the following steps:

c1. Cancel the registration event, cancel the user event and unbind the corresponding data from the CAN communication standard cluster by name,

c2, turn off the CAN device, the running state enumeration is given Exit value, then end the program;

The secondary thread includes a receiving thread, a loop sending query message thread, an output parameter modification thread, and a calibration high and low parameter modification thread,

The running process of the receiving thread comprises the following steps:

F1. First judge whether the state of the main thread is open. If the state of the main thread is open, call the subVI.

F2. Convert the format of the received CAN message into a CAN communication standard cluster by calling the CAN secondary library. Otherwise, it is judged that CAN is open, and the delay is 50ms.

F3, after obtaining the CAN communication standard cluster, judge whether it is empty information, if not empty information, then continue to operate, the message is analyzed and translated;

The function of the loop sending query message thread is to obtain and update various operating parameters and mode status data of the digital power module in time, and the operation process includes the following steps:

T1. After entering the loop to send the query message thread, judge the state of the main thread, and then through a parallel program block diagram that automatically generates polling parameters according to the protocol, obtain the data frame and combine it into a character string of the data frame for the query.

T2. Next, judge the state of the main thread, enter a sending program block diagram independent of the main thread,

T3. Finally, judge the state of the main thread and update the data of the multi-column list box.

T4. To update the data of the multi-column list box, it is necessary to judge that the queued number of data frames does not exceed 500, then judge whether to clear the multi-column list box, and finally update the received data to the multi-column list box control,

The output parameter modification thread is to modify various operating parameters and mode status data of the digital power module, and the operation process includes the following steps:

W1. After entering the output parameter modification thread, first judge the parameter setting enumeration, then add the corresponding program branch to synthesize the string used in the output message, and transmit this data to the main thread, and trigger the key event of the main thread ,

W2. At the same time, there is a parallel program of a dialog box that is executed in this secondary thread.

W3. In addition to message synthesis, it will also judge the enumerated variables generated by the drop-down selection control, and generate corresponding prompt information to prompt the user to input the corresponding parameter range;

The function of the calibration high and low parameter modification thread is to calibrate the digital power module, and the operation process includes the following steps:

X1. To judge the enumeration of the numerical input control of "calibration high and low setting" and the numerical input control of "calibration setting", respectively, and then count them into the corresponding program branch respectively,

X2. Then read the data of the data control in the corresponding program branch and synthesize the data frame, and output the string of calibration parameters.

X3. Press the send button on the current panel, and the main thread enters the corresponding event branch to receive the string and send the CAN message.
A kind of reconfigurable multi-threaded parallel upper computer system based on CAN communication according to claim 1, characterized in that: the main thread is in the Init state, and the main function of the main thread is to open the CAN device and initialize it, The specific operations include decomposing and re-bundling the CAN communication standard cluster, generating the UI update event UpdateUIEvent by calling attribute nodes and dynamic registration events, so as to update the CAN communication standard cluster and adjust the state of UI data in time, and at the same time, set up the running status Assign Wait to let the main thread enter Wait mode.
A reconfigurable multi-threaded parallel upper computer system based on can communication according to claim 1, wherein the main thread is in the Wait state, and the main function of the main thread is to wait for the CAN device to be ready to complete, and to judge the CAN The operating state of the device determines which main thread state to enter next and updates the information in the CAN communication standard cluster. The main thread in the Wait state is a program with an event structure. The event types of the event structure mainly include the CAN communication standard cluster. specific information value change and front panel close events.
A reconfigurable multi-threaded parallel upper computer system based on can communication according to claim 1, characterized in that: when the main thread is in the Run state, the main function of the main thread is to judge and receive data from each secondary thread , and pack these data into CAN communication standard clusters, and call the CAN sending subroutine to convert the packaged CAN communication standard clusters into CAN messages and send them out.
A kind of reconfigurable multi-threaded parallel upper computer system based on can communication according to claim 1, characterized in that: the main thread is in the Init state, and the main function of the main thread is to open the CAN device and initialize it, The specific operations include decomposing and re-bundling the CAN communication standard cluster, generating the UI update event UpdateUIEvent by calling attribute nodes and dynamic registration events, so as to update the CAN communication standard cluster and adjust the state of UI data in time, and at the same time, set up the running status Assign Wait to let the main thread enter Wait mode.
A reconfigurable multi-threaded parallel upper computer system based on can communication according to claim 1, wherein the main thread is in the Wait state, and the main function of the main thread is to wait for the CAN device to be ready to complete, and to judge the CAN The operating state of the device determines which main thread state to enter next and updates the information in the CAN communication standard cluster.
A reconfigurable multi-threaded parallel upper computer system based on can communication according to claim 1, characterized in that: the secondary thread also includes calibration reset, identification code synthesis, module serial number setting parameter modification, module status Information separation and display, logic variable output, power module switch thread.