Synchronous control method and device for magnetic suspension molecular pump carrying FPGA (Field Programmable Gate Array)

Abstract

The invention relates to the technical field of molecular pump control, and discloses a synchronous control method and device for a magnetic suspension molecular pump carrying an FPGA (Field Programmable Gate Array), and the method comprises the steps: receiving a message in response to a UART (Universal Asynchronous Receiver / Transmitter) signal output by a magnetic suspension molecular pump controller, and storing the message in a txd-FIFO (First In First Out) buffer area; system configuration is carried out according to an analysis result of the message, a transmission instruction is sent to a lower computer, and a TXD signal is output; a clock synchronization mechanism is used for controlling the system to operate under the condition of a synchronous clock CLK; in response to a message reading instruction of the magnetic suspension molecular pump controller, the message read through the RXD signal is stored to the rxd-FIFO buffer area, and the message is returned to the magnetic suspension molecular pump controller, the FPGA chip is introduced, the buffer area is added, clock synchronization is carried out, clock error accumulation caused by serial data transmission is reduced, and the reliability of the magnetic suspension molecular pump controller is improved. The requirement of high-speed Internet of Things communication development is met, and the stability of controller communication output signals is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of molecular pump control, and in particular to a method and device for synchronously controlling a magnetically suspended molecular pump equipped with an FPGA. Background Art

[0002] The suspended molecular pump is a mechanical vacuum pump that obtains high vacuum and ultra-high vacuum. It pumps air through a combination of high-speed rotating multi-stage turbine rotor blades and stationary blades, producing a high compression ratio for the pumped gas in the molecular flow area, thereby obtaining the required vacuum performance. The magnetic levitation molecular pump can only be used to obtain high and ultra-high vacuum, and must be equipped with a reasonable front pump and a matching molecular pump controller. The magnetic levitation molecular pump is widely used in: vacuum acquisition of physical surface analysis instruments, vacuum acquisition of accelerator technology, vacuum acquisition of plasma technology, vacuum acquisition of simulated environments in aerospace, vacuum acquisition of electronic and electrical component manufacturing, vacuum acquisition of various surface coatings, etc. The KYKY integrated magnetic levitation molecular pump is a type of compound turbomolecular pump, which is widely used in semiconductors, industrial coatings, scientific research, surface analysis, vacuum electronic devices and other fields.

[0003] As the core component of the molecular pump, the controller is responsible for many functions such as molecular pump operation control, operation data monitoring, inter-board communication, external communication, etc. As the industrial field's requirements for molecular pump control speed and accuracy continue to increase, higher requirements are placed on the stability of the communication signal transmission of the molecular pump controller. On industrial production lines, unstable communication transmission can lead to problems such as data packet loss and message loss. In severe cases, it can cause unstable control signals, communication interruptions, and even abnormal equipment shutdowns. Therefore, improving the stability of the controller's communication output signal is crucial for industrial safety production. Summary of the invention

[0004] In view of this, the present invention provides a method and device for synchronously controlling a magnetic suspension molecular pump equipped with an FPGA to solve the problem of how to improve the stability of the controller communication output signal.

[0005] In a first aspect, the present invention provides a synchronous control method of a magnetic levitation molecular pump equipped with an FPGA, which is applied to a synchronous control system of a magnetic levitation molecular pump equipped with an FPGA. The method comprises:

[0006] In response to the UART signal output by the magnetic levitation molecular pump controller, receiving the message and storing the message in the txd-FIFO buffer;

[0007] Configure the system according to the parsing results of the message, send transmission instructions to the lower computer, and output TXD signal;

[0008] The clock synchronization mechanism is used to control the system to run under the condition of synchronous clock CLK;

[0009] In response to the message reading instruction of the magnetic levitation molecular pump controller, the message read through the RXD signal is stored in the rxd-FIFO buffer, and the message is returned to the magnetic levitation molecular pump controller.

[0010] The present invention introduces an FPGA chip, increases a buffer, stores received messages in a txd-FIFO buffer to improve data transmission reliability, performs system configuration by parsing messages to improve communication efficiency, utilizes a clock synchronization mechanism to perform clock synchronization, reduces clock error accumulation caused by serial data transmission, stores the read messages in an rxd-FIFO buffer, and returns them to a magnetic levitation molecular pump controller to meet the needs of the development of high-speed Internet of Things communications and improve the stability of the controller communication output signal.

[0011] In an optional implementation, before performing system configuration according to the parsing result of the message, the method further includes:

[0012] Perform specificity check on the message;

[0013] If the message specificity check passes, the message is parsed to obtain the parsing result of the message.

[0014] The present invention performs specific verification on the message to effectively detect errors in the message transmission process, ensure that the received data is consistent with the sent data, and thus ensure the correctness of the message transmission.

[0015] In an optional implementation, the parsing result of the message includes transmission clock frequency, baud rate, UART pin information, and GPIO enable pin information, and system configuration is performed according to the parsing result of the message, including:

[0016] Configure the system based on the parsed transmission clock frequency, baud rate, UART pin information, and GPIO enable pin information.

[0017] The present invention configures the system according to the parsed transmission clock frequency, baud rate, UART pin information, and GPIO enable pin information to configure key parameters, improve communication efficiency, and improve overall performance.

[0018] In an optional implementation, after storing the message read through the RXD signal in the rxd-FIFO buffer, the method further includes:

[0019] Perform specificity check on the message;

[0020] If the message specificity check passes, the step of returning the message to the magnetic levitation molecular pump controller is executed.

[0021] The present invention performs specificity verification on the read message to detect errors in the message transmission process and ensure the correctness of the data.

[0022] In an optional embodiment, the method further includes:

[0023] Configure the initialization baud rate, respond to the handshake request sent by the host computer, and adjust the baud rate according to the handshake request so that both the FPGA and the host computer are adjusted to the new baud rate.

[0024] The present invention adjusts the baud rates of the FPGA and the host computer to new baud rates by handshaking with the host computer, thereby establishing a basis for reliable communication and avoiding data transmission errors caused by baud rate mismatch.

[0025] In an optional embodiment, the method further includes:

[0026] Transmit handshake messages to the lower computer, determine the working mode of the lower computer, and set the working mode to be consistent with the working mode of the lower computer.

[0027] The present invention transmits a handshake message to the lower computer to identify the working mode of the lower computer, and adjusts the working mode of the FPGA to match the working mode of the lower computer, thereby ensuring communication between the two.

[0028] In a second aspect, the present invention provides a synchronous control device for a magnetically suspended molecular pump equipped with an FPGA, the device comprising:

[0029] A receiving module, used for receiving a message in response to a UART signal output by the magnetic levitation molecular pump controller, and storing the message in a txd-FIFO buffer;

[0030] The signal output module is used to configure the system according to the parsing results of the message, send transmission instructions to the lower computer, and output TXD signals;

[0031] An operation module is used to control the system to operate under the condition of a synchronous clock CLK by using a clock synchronization mechanism;

[0032] The return module is used to respond to the message reading instruction of the magnetic levitation molecular pump controller, store the message read through the RXD signal into the rxd-FIFO buffer, and return the message to the magnetic levitation molecular pump controller.

[0033] In a third aspect, the present invention provides a computer device, comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to execute the method for synchronous control of a magnetically levitated molecular pump equipped with an FPGA according to the first aspect or any corresponding embodiment thereof.

[0034] In a fourth aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the method for synchronous control of a magnetically levitated molecular pump equipped with an FPGA according to the first aspect or any corresponding embodiment thereof.

[0035] In a fifth aspect, the present invention provides a computer program product, including computer instructions, which are used to enable a computer to execute the method for synchronous control of a magnetically suspended molecular pump equipped with an FPGA according to the first aspect or any corresponding embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 It is a schematic flow chart of a synchronous control method of a magnetic suspension molecular pump equipped with FPGA according to an embodiment of the present invention;

[0038] Figure 2 is an application schematic diagram of a synchronous control method of a magnetic suspension molecular pump equipped with FPGA according to an embodiment of the present invention;

[0039] Figure 3 : is a structural block diagram of a magnetic suspension molecular pump synchronous control device equipped with FPGA according to an embodiment of the present invention;

[0040] Figure 4 It is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0042] As the core component of the molecular pump, the controller is responsible for many functions such as molecular pump operation control, operation data monitoring, inter-board communication, external communication, etc. Among them, in order to meet the different needs of different customers, its external communication has the following methods:

[0043] (1) Realize serial communication through RS232;

[0044] (2) Realize serial communication through RS485;

[0045] (3) Signal transmission and control through GPIO;

[0046] (4) Industrial Internet control through EtherCAT;

[0047] (5) Signal transmission and control through touch screen;

[0048] (6) Signal transmission and control through Profibus;

[0049] (7) Signal transmission and control are achieved through Profinet.

[0050] The communication scheme currently used by the magnetic levitation molecular pump control board is mainly to use UART (Universal Asynchronous Receiver / Transmitter) to realize serial data transmission and reception. Although this scheme is relatively simple in hardware design, there may be slight frequency differences in the clock sources of different devices. Over time, this frequency difference may cause the accumulation of errors in data transmission. During the data transmission process between the sender and the receiver, mismatches may occur. If the sender sends data too fast, the receiver may not be able to process it in time, resulting in data loss or buffer overflow. UART error detection and processing usually rely on software to implement. If the software is not handled properly, data transmission errors may not be discovered and corrected in time, thereby affecting the reliability of the system.

[0051] For the clock error accumulation problem in UART data transmission, the solution is as follows:

[0052] (1) Select a high-precision clock source:

[0053] Use a high-quality crystal oscillator for the UART module to provide a more stable and accurate clock signal. For example, a temperature compensated crystal oscillator (TCXO) or oven controlled crystal oscillator (OCXO) has higher accuracy and stability and can reduce the accumulation of clock errors. Make sure the frequency of the crystal oscillator matches the baud rate required by the UART, and try to choose a crystal oscillator with low frequency deviation.

[0054] (2) Optimize hardware layout:

[0055] Reasonably lay out the clock lines and UART signal lines on the PCB to reduce signal interference and clock jitter. Keep the clock lines short and straight, and avoid crossing or being close to other high-speed signal lines to reduce the impact of electromagnetic interference on the clock signal.

[0056] Use good grounding and power filtering techniques to ensure the stability of the clock signal.

[0057] (3) Data verification and error correction:

[0058] Data checking and error correction mechanisms are used in UART communication, such as parity check, cyclic redundancy check (CRC), etc. These mechanisms can detect and correct errors in data transmission and reduce data errors caused by clock errors. When the receiving end detects a data error, it can request the sending end to resend the data to ensure the accuracy of the data.

[0059] (4) Timeout and retransmission mechanism:

[0060] Set a reasonable timeout period. When the receiving end does not receive data within a certain period of time or the received data is incomplete, the timeout mechanism is triggered and the sending end is requested to resend the data. The retransmission mechanism can ensure that data transmission can be restored in time when clock errors cause data loss or errors.

[0061] (5) Software filtering:

[0062] Software filtering is performed on the received data to remove noise and interference caused by clock errors. Digital filters, mean filters, or other filtering algorithms can be used to smooth the received data and improve the accuracy of the data.

[0063] (6) Reduce the communication rate:

[0064] If the clock error accumulation problem is serious, you can consider reducing the UART communication rate. A lower communication rate can reduce the impact of clock errors on data transmission, but it will reduce the efficiency of data transmission.

[0065] When selecting the communication rate, it is necessary to comprehensively consider the system performance requirements and the impact of clock errors.

[0066] (7) Use clock synchronization technology:

[0067] Introducing a clock synchronization mechanism into the system, such as using an external clock source or a synchronous bus to synchronize the clocks of the sender and receiver, can ensure that the clocks of both parties remain consistent and reduce the accumulation of clock errors.

[0068] Among them, selecting a high-precision clock source, performing data verification and error correction, and adopting a timeout and retransmission mechanism can effectively improve the problem of clock error accumulation in data transmission, but it cannot fundamentally avoid the occurrence of error accumulation problems; optimizing hardware layout can reduce the impact of electromagnetic interference, but with the continuous development of molecular pumps and the demand for miniaturized controllers, the difficulty has increased significantly, and the structures of different types of molecular pump controllers are different, which requires the circuits of each model to be optimized one by one, which is not conducive to the rapid promotion of new models. Software filtering can reduce the impact of clock errors on data to a certain extent, but filtering often leads to increased data delays. The use of clock synchronization technology can effectively solve the problem of clock error accumulation from the root, improve the stability of signal transmission, reduce the complexity of hardware development, and be compatible with more types of molecular pump controllers.

[0069] The embodiment of the present invention realizes clock synchronization between multiple control chips by adding an FPGA chip at the output end on the basis of current serial communication. Clock synchronization is realized in communication with EtherCAT board, Profinet, Profibus board, and synchronous clock output is selected on the DB9 pin used for RS232 / RS485 data transmission. All optional controls can be controlled in the main controller.

[0070] Specifically, FPGA (Field Programmable Gate Array) is an integrated circuit that can be programmed to implement specific logic functions. It contains modules such as programmable input and output block (IOB) and digital clock manager (DCM). The digital clock management module is used to manage and process clock signals, eliminate clock delays, perform frequency synthesis, adjust clock phases, reduce clock jitter, etc., and provide accurate and stable clock signals for various modules inside the FPGA.

[0071] According to an embodiment of the present invention, an embodiment of a synchronous control method of a magnetic levitation molecular pump equipped with an FPGA is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0072] In this embodiment, a synchronous control method of a magnetic levitation molecular pump equipped with FPGA is provided, which is applied to a synchronous control system of a magnetic levitation molecular pump equipped with FPGA. The system includes a host computer, FPGA and a slave computer. The method uses FPGA as the execution body. Figure 1FIG. 1 is a flow chart of a synchronous control method of a magnetic suspension molecular pump equipped with an FPGA according to an embodiment of the present invention. Figure 1 As shown, the process includes the following steps:

[0073] Step S101, in response to the UART signal output by the magnetic levitation molecular pump controller, receiving a message and storing the message in a txd-FIFO buffer.

[0074] In an embodiment of the present invention, the magnetic levitation molecular pump controller uses UART to realize serial data transmission and reception. The UART signal output by the magnetic levitation molecular pump controller transmits the message to be sent to the FPGA for processing through serial transmission, sets a buffer area, and stores the transmitted message in the txd-FIFO buffer.

[0075] Step S102, configure the system according to the parsing result of the message, send a transmission instruction to the lower computer, and output a TXD signal.

[0076] In the embodiment of the present invention, the FPGA parses the message content to obtain the TXD signal to be sent, then performs system configuration, sends a transmission instruction to the lower computer, enables the output, and outputs the TXD signal.

[0077] Step S103, using a clock synchronization mechanism to control the system to run under the condition of a synchronous clock CLK.

[0078] In the embodiment of the present invention, during the data transmission process, the FPGA, the magnetic suspension molecular pump controller and the lower computer all use the same clock signal CLK for synchronization to ensure that the operations between the components are coordinated and consistent, thereby ensuring the stability and reliability of data transmission.

[0079] Step S104, in response to the message reading instruction of the magnetic levitation molecular pump controller, the message read through the RXD signal is stored in the rxd-FIFO buffer, and the message is returned to the magnetic levitation molecular pump controller.

[0080] In an embodiment of the present invention, when the magnetic levitation molecular pump controller reads a message from the lower computer, it reads the message through the RXD signal, sets a buffer area, stores the message in the rxd-FIFO buffer, and then returns the message to the magnetic levitation molecular pump controller through serial transmission.

[0081] The synchronous control method of a magnetic levitation molecular pump equipped with FPGA provided in this embodiment introduces an FPGA chip, adds a buffer, stores the received message in the txd-FIFO buffer to improve data transmission reliability, performs system configuration by parsing the message to improve communication efficiency, uses a clock synchronization mechanism to perform clock synchronization to reduce the accumulation of clock errors caused by serial data transmission, stores the read message in the rxd-FIFO buffer, and returns it to the magnetic levitation molecular pump controller to meet the needs of the development of high-speed Internet of Things communications and improve the stability of the controller communication output signal.

[0082] In this embodiment, a synchronous control method of a magnetic suspension molecular pump equipped with an FPGA is provided, and the process includes the following steps:

[0083] Step S201, configuring the initialization baud rate, responding to the handshake request sent by the host computer, and adjusting the baud rate according to the handshake request, so that both the FPGA and the host computer are adjusted to the new baud rate.

[0084] In the embodiment of the present invention, the FPGA configures the initialization baud rate. At the initialization baud rate, the host computer sends a handshake request to the FPGA, and the request includes information about the new baud rate. The FPGA responds to the handshake request transmitted by the host computer, parses the information about the new baud rate in the handshake request, and then adjusts both the FPGA and the host computer to the new baud rate according to the handshake information in the handshake request.

[0085] By handshaking with the host computer, the baud rates of both the FPGA and the host computer are adjusted to the new baud rate, establishing the basis for reliable communication and avoiding data transmission errors caused by baud rate mismatch.

[0086] Step S202 , in response to the UART signal output by the magnetic levitation molecular pump controller, receiving a message and storing the message in a txd-FIFO buffer.

[0087] For details, please see Figure 1 Step S101 of the illustrated embodiment will not be described in detail here.

[0088] Step S203: perform specificity verification on the message.

[0089] Step S204: if the message specificity check passes, the message is parsed to obtain a parsing result of the message.

[0090] In the embodiment of the present invention, the FPGA performs specificity verification on information such as the message header and the check code. If the message specificity verification passes, the message is parsed to obtain a parsing result of the message.

[0091] Specifically, data checking and error correction mechanisms are used in UART communication, including parity check, cyclic redundancy check (CRC), etc. These mechanisms can detect and correct errors in data transmission and reduce data errors caused by clock errors. When data errors are detected, the sender can be requested to resend the data to ensure the accuracy of the data.

[0092] By performing specific verification on the message, errors in the message transmission process can be effectively detected to ensure that the received data is consistent with the sent data, thereby ensuring the correctness of the message transmission.

[0093] Step S205, transmitting a handshake message to the lower computer, determining the working mode of the lower computer, and setting the working mode to be consistent with the working mode of the lower computer.

[0094] In the embodiment of the present invention, in order to be compatible with the lower computer that does not support synchronous clock, the communication between FPGA and the lower computer needs to transmit handshake messages to determine the working mode of the lower computer. FPGA sends a handshake request message to the lower computer. After receiving the handshake request, the lower computer parses and replies with a handshake response message to inform the current working mode. After the handshake is completed, the FPGA and the lower computer perform subsequent data transmission according to the confirmed working mode.

[0095] By transmitting a handshake message to the lower computer, the working mode of the lower computer is identified, and the working mode of the FPGA is adjusted to match the working mode of the lower computer to ensure communication between the two.

[0096] Step S206, performing system configuration according to the parsing result of the message, sending a transmission instruction to the lower computer, and outputting a TXD signal.

[0097] Specifically, the above step S206 includes:

[0098] Step S2061, performing system configuration according to the parsed transmission clock frequency, baud rate, UART pin information, and GPIO enable pin information.

[0099] In the embodiment of the present invention, the parsing result of the message includes the transmission clock frequency, baud rate, UART pin information, and GPIO enable pin information. The message is parsed, and then the transmission clock frequency, baud rate, etc. are set accordingly to complete the system configuration.

[0100] By configuring the system according to the parsed transmission clock frequency, baud rate, UART pin information, and GPIO enable pin information, key parameters can be configured to improve communication efficiency and overall performance.

[0101] Step S207, using the clock synchronization mechanism to control the system to run under the condition of the synchronous clock CLK.

[0102] For details, please see Figure 1 Step S103 of the illustrated embodiment will not be described in detail here.

[0103] Step S208 , in response to the message reading instruction of the magnetic levitation molecular pump controller, the message read through the RXD signal is stored in the rxd-FIFO buffer, and the message is returned to the magnetic levitation molecular pump controller.

[0104] In some optional embodiments, the method further comprises:

[0105] Step S2081, performing specificity check on the message.

[0106] Step S2082: if the message specificity check passes, the step of returning the message to the magnetic levitation molecular pump controller is executed.

[0107] In the embodiment of the present invention, the message is read through the RXD signal, stored in the rxd-FIFO buffer, and the message specificity check is performed. If the message specificity check passes, the message is returned to the magnetic levitation molecular pump controller.

[0108] The synchronous control method of a magnetic suspension molecular pump equipped with an FPGA provided in this embodiment performs specific verification on the read message to detect errors in the message transmission process and ensure the correctness of the data.

[0109] like Figure 2 As shown, the embodiment of the present invention introduces an FPGA chip, implements a clock synchronization solution, and adds a buffer function, a message verification function, etc., to further reduce the clock error accumulation problem caused by serial data transmission and improve the stability of communication transmission.

[0110] The clock synchronization technology solution is implemented using FPGA chips. FPGA has the following advantages: It has parallel processing capabilities. FPGA has a large number of logic units and hardware resources and can perform multiple tasks at the same time. This parallel processing capability gives FPGA a great advantage in processing high-speed data and complex algorithms; with high-speed processing capabilities, FPGA can achieve very high clock frequencies, so that it can quickly process large amounts of data. Compared with traditional microprocessors, FPGA can provide higher performance when processing certain specific tasks and has low latency characteristics. Since FPGA is implemented in hardware, its processing latency is very low.

[0111] In this embodiment, a magnetic suspension molecular pump synchronous control device equipped with FPGA is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware of a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0112] This embodiment provides a synchronous control device for a magnetic suspension molecular pump equipped with an FPGA. Figure 3 As shown, including:

[0113] The receiving module 301 is used to receive a message in response to the UART signal output by the magnetic suspension molecular pump controller, and store the message in a txd-FIFO buffer.

[0114] The signal output module 302 is used to perform system configuration according to the parsing result of the message, send a transmission instruction to the lower computer, and output a TXD signal.

[0115] The operation module 303 is used to control the system to operate under the condition of the synchronous clock CLK by using the clock synchronization mechanism.

[0116] The return module 304 is used to respond to the message reading instruction of the magnetic levitation molecular pump controller, store the message read through the RXD signal into the rxd-FIFO buffer, and return the message to the magnetic levitation molecular pump controller.

[0117] In some optional embodiments, the device further comprises:

[0118] The first verification module is used to perform specificity verification on the message.

[0119] The parsing module is used to parse the message if the message specificity check passes, and obtain the parsing result of the message.

[0120] In some optional implementations, the signal output module 302 includes:

[0121] The configuration unit is used to configure the system according to the parsed transmission clock frequency, baud rate, UART pin information, and GPIO enable pin information.

[0122] In some optional embodiments, the device further comprises:

[0123] The second verification module is used to perform specific verification on the message.

[0124] The execution module is used for returning the message to the magnetic levitation molecular pump controller if the message specificity check passes.

[0125] In some optional embodiments, the device further comprises:

[0126] The adjustment module is used to configure the initialization baud rate, respond to the handshake request sent by the host computer, and adjust the baud rate according to the handshake request so that both the FPGA and the host computer are adjusted to the new baud rate.

[0127] In some optional embodiments, the device further comprises:

[0128] The setting module is used to transmit handshake messages to the lower computer, determine the working mode of the lower computer, and set the working mode to be consistent with the working mode of the lower computer.

[0129] The further functional description of each of the above modules and units is the same as that of the above corresponding embodiments and will not be repeated here.

[0130] The magnetic levitation molecular pump synchronization control device equipped with FPGA in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0131] The embodiment of the present invention also provides a computer device having the above Figure 3 The magnetic levitation molecular pump synchronous control device equipped with FPGA is shown.

[0132] See also Figure 4 , Figure 4 is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Figure 4 As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 4 A processor 10 is taken as an example.

[0133] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0134] The memory 20 stores instructions executable by at least one processor 10, so that at least one processor 10 executes the method shown in the above embodiment.

[0135] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0136] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[0137] The computer device also includes an input device 30 and an output device 40. The processor 10, the memory 20, the input device 30 and the output device 40 may be connected via a bus or other means. Figure 4 The example of connecting through bus is taken in the following.

[0138] The input device 30 can receive input digital or character information and generate key signal input related to user settings and function control of the computer device, such as a touch screen, etc. The output device 40 can include a display device, etc.

[0139] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0140] A part of the present invention may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the existence of the computer program instruction in a computer-readable medium includes, but is not limited to, a source file, an executable file, an installation package file, etc., and accordingly, the way in which the computer program instruction is executed by the computer includes, but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium may be any available computer-readable storage medium or communication medium accessible to the computer.

[0141] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope of the present application.

Claims

1. A synchronous control method of a magnetic suspension molecular pump equipped with FPGA, characterized in that: Applied to a synchronous control system of a magnetically suspended molecular pump equipped with an FPGA, the method comprises: In response to the UART signal output by the magnetic levitation molecular pump controller, receiving the message and storing the message in the txd-FIFO buffer; Configure the system according to the parsing results of the message, send transmission instructions to the lower computer, and output TXD signal; The clock synchronization mechanism is used to control the system to run under the condition of synchronous clock CLK; In response to the message reading instruction of the magnetic levitation molecular pump controller, the message read through the RXD signal is stored in the rxd-FIFO buffer, and the message is returned to the magnetic levitation molecular pump controller.

2. The method according to claim 1, characterized in that: Before performing system configuration according to the parsing result of the message, the method further includes: Perform specificity check on the message; If the message specificity check passes, the message is parsed to obtain the parsing result of the message.

3. The method according to claim 2, characterized in that The parsing result of the message includes transmission clock frequency, baud rate, UART pin information, and GPIO enable pin information. The system configuration according to the parsing result of the message includes: Configure the system based on the parsed transmission clock frequency, baud rate, UART pin information, and GPIO enable pin information.

4. The method according to claim 1, characterized in that: After storing the message read through the RXD signal in the rxd-FIFO buffer, the method further includes: Perform specificity check on the message; If the message specificity check passes, the step of returning the message to the magnetic levitation molecular pump controller is performed.

5. The method according to claim 1, characterized in that The method further comprises: The configuration initializes the baud rate, responds to the handshake request sent by the host computer, and adjusts the baud rate according to the handshake request so that both the FPGA and the host computer are adjusted to the new baud rate.

6. The method according to claim 1, characterized in that The method further comprises: Transmit handshake messages to the lower computer, determine the working mode of the lower computer, and set the working mode to be consistent with the working mode of the lower computer.

7. A magnetic suspension molecular pump synchronous control device equipped with FPGA, characterized in that: The device comprises: A receiving module, used for receiving a message in response to a UART signal output by the magnetic levitation molecular pump controller, and storing the message in a txd-FIFO buffer; The signal output module is used to configure the system according to the parsing results of the message, send transmission instructions to the lower computer, and output TXD signals; An operation module is used to control the system to operate under the condition of a synchronous clock CLK by using a clock synchronization mechanism; The return module is used to respond to the message reading instruction of the magnetic levitation molecular pump controller, store the message read through the RXD signal into the rxd-FIFO buffer, and return the message to the magnetic levitation molecular pump controller.

8. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the synchronous control method of a magnetically suspended molecular pump equipped with an FPGA according to any one of claims 1 to 6 by executing the computer instructions.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the synchronous control method of a magnetically suspended molecular pump equipped with an FPGA according to any one of claims 1 to 6.

10. A computer program product, characterized in that The method comprises computer instructions, wherein the computer instructions are used to enable a computer to execute the synchronous control method of a magnetically suspended molecular pump equipped with an FPGA according to any one of claims 1 to 6.

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