CN109753477A - A kind of embedded Control equipment and its control method - Google Patents
A kind of embedded Control equipment and its control method Download PDFInfo
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Abstract
The present invention provides a kind of embedded Control equipment and its control method, including governor circuit and interface circuit, the governor circuit are connected with the interface circuit by preset interface；The governor circuit includes first microprocessor and several extended interface units；The first microprocessor is for realizing logic control and mathematical operation；The interface circuit includes the second microprocessor and several functional units；The functional unit is for realizing a certain function other than logic control and mathematical operation；Second microprocessor realizes corresponding function for controlling the functional unit.The governor circuit of embedded Control equipment and interface circuit are independently arranged by embedded Control equipment and its control method of the invention, to reduce the workload and design complexities of governor circuit, improve the reliability and stability of work.
Description
Technical field
The present invention relates to the technical fields of automation control, more particularly to a kind of embedded Control equipment and its controlling party
Method.
Background technique
Embedded Control equipment is for executing specified independent control function and there is complex way to handle data capability
Control system, usually by embedded microelectric technique chip (including microprocessor chip, timer, sequencer or control
A series of microelectronic components such as device processed) come the electronic equipment or device that control, it can complete at the various automations such as monitoring, control
Reason task.
In the prior art, most of embedded Control equipment uses nonshared control unit, and structure is mostly list CPU knot
Structure.The embedded Control equipment of this structure has the following deficiencies:
(1) all control processes, button operation, the information of embedded Control equipment show, IO control it is complete by the CPU
At causing the workload of the CPU larger, system reliability and stability are poor；
(2) design complexities of control algolithm are higher, are unfavorable for subsequent upgrading and maintenance work；
(3) due to the factor of product orientation, this kind of equipment I/O expansion is difficult, and performance is poor, is only capable of implementing specifically producing
Process control function；
(4) the logical AND mathematical operation function of embedded Control equipment is relatively simple, hardly has the energy of secondary development
Power.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of embedded Control equipment and its
The governor circuit of embedded Control equipment and interface circuit are independently arranged by control method, to reduce governor circuit
Workload and design complexities improve the reliability and stability of work.
In order to achieve the above objects and other related objects, the present invention provides a kind of embedded Control equipment, including master control electricity
Road and interface circuit, the governor circuit and the interface circuit are connected by preset interface；The governor circuit includes first
Microprocessor and several extended interface units；The first microprocessor is for realizing logic control and mathematical operation；It is described to connect
Mouth circuit includes the second microprocessor and several functional units；The functional unit for realizing logic control and mathematical operation with
Outer a certain function；Second microprocessor realizes corresponding function for controlling the functional unit.
In one embodiment of the invention, the preset interface is RS232 interface, the governor circuit and the interface circuit
It is communicated based on RS232 communication protocol.
In one embodiment of the invention, several extended interface units include display interface unit, Bus Interface Unit,
One of Ethernet interface unit, usb interface unit, TF interface unit and Audio interface unit or multiple combinations；It is described aobvious
Show interface unit for connect display equipment；The Bus Interface Unit is for extending peripheral I/O devices；The Ethernet interface
Unit is for connecting local area network or internet；The usb interface unit is for connecting USB device；The TF card interface unit is used
In connection TF card；The Audio interface unit is for connecting audio frequency apparatus.
In one embodiment of the invention, several functional units include power management unit, function selection unit, state
One of display unit and electric interfaces unit or multiple combinations；The power management unit is for realizing the embedded control
The pressure stabilizing of control equipment is powered；The function selection unit for realizing the function of the embedded Control equipment selection and cut
It changes；The status display unit is used to show the current working status of the embedded Control equipment；The electric interfaces unit
For realizing the connection of electrical equipment.
It further include the peripheral electrical equipment extended by bus interface in one embodiment of the invention.
Meanwhile the present invention provides a kind of control method of above-mentioned embedded Control equipment, comprising the following steps:
The governor circuit sends main data frames to the interface circuit；
When not receiving new data within a preset time, the interface circuit is sent from data frame to the master control electricity
Road.
In one embodiment of the invention, the main data frames are identical with the structure from data frame, include data head
Field, handshake packet field, CDF communications data field and verification data field.
It is described to shake hands after the governor circuit and each success communication of the interface circuit in one embodiment of the invention
The data of packet field increase default value.
In one embodiment of the invention, the data head data governor circuit and the interface circuit are appointed
Fixed data.
In one embodiment of the invention, the main data frames and the traffic rate from data frame be 9600bps,
19200bps, 38400bps or 115200bps.
As described above, embedded Control equipment of the invention and its control method, have the advantages that
(1) governor circuit of embedded Control equipment and interface circuit are independently arranged, keep governor circuit special
Note realizes the control and logical operation function of core, and the absorbed realization of interface circuit need to occupy a large amount of I/O hardware resource and CPU is soft
The other functions such as the human-computer interaction of part resource, electrical input filter, IO control, function control, status display, to reduce master control
Circuit and power consumption, greatly improve the reliability of entire embedded controller；
(2) brilliant logical AND mathematical operation performance is provided by using high performance governor circuit, so that this hair
Bright embedded Control equipment can undertake more computing loads；
(3) built-in Linux operating system of matching standard, embedded Control equipment of the invention can simply extend
For Advanced Control Equipment, programmable logic controller (PLC), motion controller and data collection station etc.；
(4) by utilizing high performance bus, embedded Control equipment of the invention is capable of providing almost limitless electrical
I/O resource；
(5) outstanding status display and state control function can be provided in the case where being not take up more cpu loads；
(6) perfect firmware updating function is provided, firmware update can be carried out by simple operations, be convenient for subsequent upgrading
With maintenance work.
Detailed description of the invention
Fig. 1 is shown as the embedded Control equipment of the invention structural schematic diagram in an embodiment；
Fig. 2 is shown as the structural schematic diagram of embedded Control equipment of the invention in another embodiment；
Fig. 3 is shown as the structural schematic diagram of embedded Control equipment of the invention in another embodiment
Fig. 4 is shown as the flow chart of the control method of embedded Control equipment of the invention；
Fig. 5 is shown as the communication process schematic diagram of governor circuit and interface circuit of the invention；
Fig. 6 is shown as main data frames of the invention and the structural schematic diagram from data frame.
Component label instructions
1 governor circuit
11 first microprocessors
12 extended interface units
2 interface circuits
21 second microprocessors
22 functional units
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.It should be noted that in the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
It should be noted that illustrating the basic structure that only the invention is illustrated in a schematic way provided in following embodiment
Think, only shown in schema then with related component in the present invention rather than component count, shape and size when according to actual implementation
Draw, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its assembly layout kenel
It is likely more complexity.
Embedded Control equipment and its control method of the invention is electric by the governor circuit of embedded Control equipment and interface
Road is independently arranged, and realizes different functions respectively, to reduce the workload and design complexities of governor circuit, is mentioned
The reliability and stability of height work, and it is convenient for subsequent extension and maintenance work.
As shown in Figure 1, embedded Control equipment of the invention includes governor circuit 1 and interface circuit in an embodiment
2, the governor circuit 1 is connected with the interface circuit 2 by preset interface；The governor circuit 1 includes first microprocessor
11 and several extended interface units 12；The first microprocessor 11 is for realizing logic control and mathematical operation；The interface
Circuit 2 includes the second microprocessor 21 and several functional units 22；The functional unit 22 is for realizing logic control and mathematics
A certain function other than operation；Second microprocessor 21 realizes corresponding function for controlling the functional unit 22.
Preferably, the first microprocessor 11 uses Cortex-A9Quad processor.The processor performance is powerful, connects
It is mouthful abundant, can be realized using the processor logic control function of embedded Control equipment of the invention, mathematical operation function,
Bus I/O expansion function, communication function and the control function being connect with interface circuit.These functions are operated in built-in Linux
Under system is supported, it is easy to develop maintenance.
Preferably, second microprocessor 21 uses Cortex-M3MCU.The processor is cheap, resourceful,
Can be realized the function selection of embedded Control equipment of the invention, status display, power supply management, electric interfaces and with master control electricity
Road communication function.These functions are run in veneer, stable and reliable operation, and can be in the case where governor circuit I/O expansion is difficult
IO quantity is extended, the function of embedded Control equipment of the invention is greatly enriched.
In one embodiment of the invention, the preset interface is RS232 interface, the governor circuit 1 and interface electricity
Road 2 is based on RS232 communication protocol and is communicated.
In one embodiment of the invention, several extended interface units include display interface unit, Bus Interface Unit,
One of Ethernet interface unit, usb interface unit, TF interface unit and Audio interface unit or multiple combinations.
The display interface unit is for connecting display equipment.Preferably, the display interface unit is shown using HDMI
Interface unit, can be used for man-machine interface or backstage is debugged.The Bus Interface Unit is for extending peripheral I/O devices.It is described with
Too network interface unit is for connecting local area network or internet.The usb interface unit is for connecting USB device.The TF card connects
Mouth unit is for connecting TF card.The Audio interface unit is for connecting audio frequency apparatus.Pass through above-mentioned extended interface unit, energy
It is enough to extend to other equipment on the basis of the governor circuit, to realize different functions.
In one embodiment of the invention, several functional units include power management unit, function selection unit, state
One of display unit and electric interfaces unit or multiple combinations.
The power management unit is powered for realizing the pressure stabilizing of the embedded Control equipment, even if in voltage fluctuation
In the case of still be able to guarantee the reliably working of embedded Control equipment of the invention.The function selection unit is for realizing described
The selection and switching of the function of embedded Control equipment.The status display unit is for showing the embedded Control equipment
Current working status.Preferably, the status display unit uses light-emitting diode display or segment display.The electric interfaces list
Member for realizing electrical equipment connection.
Carry out the embedded Control equipment that the present invention is further explained below by specific embodiment.When of the invention embedded
When controlling equipment as motion controller, as shown in Fig. 2, governor circuit is using Cortex-A9Quad processor as micro process
Device, while display interface unit, Bus Interface Unit, Ethernet including being connected with the Cortex-A9Quad processor
Interface unit and USB/Audio interface unit；Interface circuit using Cortex-M3MCU as microprocessor, while including with
The Cortex-M3MCU connected power management unit, function selection unit, status display unit and electric interfaces unit.Its
In, the power management unit is also connected with the Cortex-A9Quad processor, to provide pressure stabilizing for the governor circuit
Power supply.It is connected between the governor circuit and the interface circuit by RS232 interface, is led to based on RS232 communication protocol
Letter.
In one embodiment of the invention, embedded Control equipment of the invention further includes the periphery extended by bus interface
Electrical equipment.As shown in figure 3, access input equipment can be extended by input interface in bus and output interface and output is set
It is standby, so that the governor circuit realizes input function and output function.
In embedded Control equipment of the invention, led between governor circuit and interface circuit by predefined communication protocol
Letter, and the mechanism coordinated with verification and principal and subordinate, to ensure the reliable of communication and go on smoothly.
As shown in figure 4, in an embodiment, the control method of embedded Control equipment of the invention the following steps are included:
Step S1, the described governor circuit sends main data frames to the interface circuit；
Specifically, governor circuit is used as masters in the communications, and interface circuit is used as passive side in the communications.Communication process
Main data frames first must be sent by governor circuit, then be returned again by slave from data frame.In general, the governor circuit is according to pre-
If sending frequency sends main data frames to the interface circuit.
Step S2, when not receiving new data within a preset time, the interface circuit is sent from data frame to described
Governor circuit.
As shown in figure 5, for interface circuit, do not receive that governor circuit sends in preset time t is new
When data, then show that the main data frames FM of governor circuit is sent.At this point, interface circuit carries out data processing, and send out simultaneously
It send from data frame FS to governor circuit.Wherein, governor circuit can be according to both sides' actual treatment ability flexible choice main data frames
The communication frequency of FM.
In one embodiment of the invention, as shown in fig. 6, the main data frames are identical with the structure from data frame,
Including data head file, handshake packet field, CDF communications data field and verification data field.
Data head file is the fixed data that the governor circuit and the interface circuit are appointed, for characterizing communication
Start.
Handshake packet field increases default value after each success communication, for recognizing the governor circuit and the interface
Circuit communication function is normal.For example, the transformation of handshake packet field makes entire data frame in the case where practical communication data are constant
It is all different in each communication, to avoid data caused by collapsing or crash due to software program process identical, favorably
In the reliability for improving communication.Preferably, after the governor circuit and each success communication of the interface circuit, the handshake packet
The data of field increase by 1.
CDF communications data field is actual exchange data, determine according to actual needs.Specifically, the number of CDF communications data field
Arranged according to definition, length and content by the governor circuit and the interface circuit.
Whether verification data field is used to distinguish data to be interfered and destroy.Preferably, using CRC16 checking algorithm
To generate verification data.
In one embodiment of the invention, the main data frames and it is described from the traffic rate of data frame be 115200bps.
Carry out the embedded Control equipment and its control method that the present invention is further explained below by specific embodiment.At this
In embodiment, embedded Control equipment is used as motion controller, and Cortex-A9Quad processor uses at the iMX6Q of NXP company
Manage device, governor circuit include HDMI display interface, EtherCAT bus interface, EtherNET communication interface, TF card interface,
Audio interface, USB interface and debugging interface etc..Interface circuit uses the STM32F103 processor of ST company, including two
Function selection unit, a status display unit and an electric interfaces unit.Function selection unit is used to select oneself of display
Define operating status；Status display unit uses 2 LED segment code pipes, is used for status display；Electric interfaces are defeated for basic status
The input controlled out with operation.
When communication, the main data frames and described 115200bps is set as from the traffic rate of data frame.Other embodiments
In, the main data frames and described it may be set to be 9600bps, 19200bps, 38400bps from the traffic rate of data frame.
Every time by governor circuit active transmission main data frames FM.When main data frames FM is being sent not sent new data in 400us,
Interface circuit then thinks that main data frames FM terminates, to start to carry out main data frames treatment process, while sending from data frame
FS is to governor circuit.When using RS232 communication protocol, main data frames FM and the data head file root from data frame FS data frame
According to RS232 feature, 0x55 and 0xAA can be respectively defined as.Governor circuit can adjust main data frames FM's according to actual needs
Send frequency.In general, according to information such as the traffic rate of data frame, data frame lengths, at the same comprehensive treatment device load with
The factors such as response time, are generally located between 100Hz-200Hz.
In conclusion embedded Control equipment and its control method of the invention are by the governor circuit of embedded Control equipment
It is independently arranged with interface circuit, governor circuit is enable to be absorbed in the control and logical operation function for realizing core, interface electricity
Road be absorbed in realize need to occupy the human-computer interaction of a large amount of I/O hardware resource and CPU software resource, electrical input filter, IO are controlled,
The other functions such as function control, status display, so that reduce governor circuit and power consumption, greatly improves entire embedded control
The reliability of device processed；Brilliant logical AND mathematical operation performance is provided by using high performance governor circuit, so that this
The embedded Control equipment of invention can undertake more computing loads；The built-in Linux operating system of matching standard, this hair
Bright embedded Control equipment can simply be extended to Advanced Control Equipment, programmable logic controller (PLC), motion controller with
And data collection station etc.；By utilizing high performance bus, embedded Control equipment of the invention is capable of providing almost limitless
Electrical I/O resource；Outstanding status display and state can be provided and control function in the case where being not take up more cpu loads
Energy；Perfect firmware updating function is provided, firmware update can be carried out by simple operations, be convenient for subsequent upgrading and maintenance workers
Make.So the present invention effectively overcomes various shortcoming in the prior art and has high industrial utilization value.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (10)
1. a kind of embedded Control equipment, which is characterized in that including governor circuit and interface circuit, the governor circuit and described
Interface circuit is connected by preset interface；
The governor circuit includes first microprocessor and several extended interface units；The first microprocessor is for realizing patrolling
Collect control and mathematical operation；
The interface circuit includes the second microprocessor and several functional units；The functional unit for realizing logic control and
A certain function other than mathematical operation；Second microprocessor realizes corresponding function for controlling the functional unit.
2. embedded Control equipment according to claim 1, which is characterized in that the preset interface is RS232 interface, institute
It states governor circuit and the interface circuit is based on RS232 communication protocol and is communicated.
3. embedded Control equipment according to claim 1, which is characterized in that several extended interface units include aobvious
Show interface unit, Bus Interface Unit, Ethernet interface unit, usb interface unit, TF interface unit and Audio interface unit
One of or multiple combinations；The display interface unit is for connecting display equipment；The Bus Interface Unit is for extending
Peripheral I/O devices；The Ethernet interface unit is for connecting local area network or internet；The usb interface unit is for connecting
USB device；The TF card interface unit is for connecting TF card；The Audio interface unit is for connecting audio frequency apparatus.
4. embedded Control equipment according to claim 1, which is characterized in that several functional units include for fulgurite
Manage one of unit, function selection unit, status display unit and electric interfaces unit or multiple combinations；The power supply management
Unit is powered for realizing the pressure stabilizing of the embedded Control equipment；The function selection unit is for realizing the embedded control
The selection and switching of the function of control equipment；The status display unit is used to show the work at present of the embedded Control equipment
State；The electric interfaces unit for realizing electrical equipment connection.
5. embedded Control equipment according to claim 1, which is characterized in that further include by the outer of bus interface extension
Enclose electrical equipment.
6. the control method of embedded Control equipment described in a kind of one of claim 1-5, which is characterized in that including following step
It is rapid:
The governor circuit sends main data frames to the interface circuit；
When not receiving new data within a preset time, the interface circuit is sent from data frame to the governor circuit.
7. the control method of embedded Control equipment according to claim 6, which is characterized in that the main data frames and institute
It states identical from the structure of data frame, includes data head file, handshake packet field, CDF communications data field and verification data field.
8. the control method of embedded Control equipment according to claim 7, which is characterized in that the governor circuit and institute
After stating each success communication of interface circuit, the data of the handshake packet field increase default value.
9. the control method of embedded Control equipment according to claim 7, which is characterized in that the data head data are
The fixed data that the governor circuit and the interface circuit are appointed.
10. the control method of embedded Control equipment according to claim 6, which is characterized in that the main data frames and
It is described from the traffic rate of data frame be 9600bps, 19200bps, 38400bps or 115200bps.
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| CN201711078093.XA CN109753477A (en) | 2017-11-06 | 2017-11-06 | A kind of embedded Control equipment and its control method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009109403A2 (en) * | 2008-03-06 | 2009-09-11 | Hilscher Gesellschaft für Systemautomation mbH | Control system with flexible communication and control structure and method for configuration thereof |
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| CN203838541U (en) * | 2014-02-28 | 2014-09-17 | Ge医疗系统环球技术有限公司 | FPGA apparatus, embedded control system and medical equipment control system |
| CN104142638A (en) * | 2014-08-11 | 2014-11-12 | 亚萨合莱自动门系统（苏州）有限公司 | Multiprocessor-based building entrance control system and method |
-
2017
- 2017-11-06 CN CN201711078093.XA patent/CN109753477A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009109403A2 (en) * | 2008-03-06 | 2009-09-11 | Hilscher Gesellschaft für Systemautomation mbH | Control system with flexible communication and control structure and method for configuration thereof |
| CN102279835A (en) * | 2011-06-29 | 2011-12-14 | 厦门雅迅网络股份有限公司 | Serial bus communication method and dynamic recognition method of master equipment and slave equipment in embedded system |
| CN203838541U (en) * | 2014-02-28 | 2014-09-17 | Ge医疗系统环球技术有限公司 | FPGA apparatus, embedded control system and medical equipment control system |
| CN104142638A (en) * | 2014-08-11 | 2014-11-12 | 亚萨合莱自动门系统（苏州）有限公司 | Multiprocessor-based building entrance control system and method |
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Application publication date: 20190514 |