CN110221997A - A kind of USB interface-based versatile interface interconnecting device - Google Patents
A kind of USB interface-based versatile interface interconnecting device Download PDFInfo
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- CN110221997A CN110221997A CN201910420744.1A CN201910420744A CN110221997A CN 110221997 A CN110221997 A CN 110221997A CN 201910420744 A CN201910420744 A CN 201910420744A CN 110221997 A CN110221997 A CN 110221997A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
- G06F13/385—Information transfer, e.g. on bus using universal interface adapter for adaptation of a particular data processing system to different peripheral devices
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R31/00—Coupling parts supported only by co-operation with counterpart
- H01R31/06—Intermediate parts for linking two coupling parts, e.g. adapter
- H01R31/065—Intermediate parts for linking two coupling parts, e.g. adapter with built-in electric apparatus
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Abstract
The invention discloses a kind of USB interface-based versatile interface interconnecting devicies, including the first USB interface, the first USB controller, processor, RS232 interface conversion circuit, RS422/485 interface conversion circuit and CAN interface conversion circuit；First USB interface is connect by the first USB controller with processor；The first via UART port of processor is connected with RS232 interface conversion circuit, and the second tunnel UART port is connected with RS422/485 interface conversion circuit, and CAN mouthfuls are connected with CAN interface conversion circuit；Output RS232 protocol data, RS422/485 protocol data, any one or more protocol data in CAN bus data of the present invention property of can choose, above-mentioned various protocols data can also be exported simultaneously, are met host computer and are passed through the needs of progress data interaction between a USB interface and one or more Devices to test with different communication interface.
Description
Technical field
The invention belongs to technical field of automatic control, more particularly, to a kind of USB interface-based versatile interface
Interconnecting device.
Background technique
It is typically necessary and is communicated between each veneer between automation control area, equipment single machine or in single machine；
More commonly used communication interface has RS232 interface, RS422/485 interface, CAN interface etc., and each single machine or each veneer pass through these
Communication interface is communicated with specific communication protocol；A problem so is faced, i.e., since each single machine or each veneer may be by
Cause in a variety of causes inconsistent in terms of manufacturing schedule, certain single machines or veneer are first produced, and need to carry out communication protocol
When debugging, matched single machine or veneer are also unavailable.At this time generally using host computer (PC machine) simulate matched single machine or
Veneer carries out integration test with it, however the external interface form of host computer is less and function fixed single, most common to be
USB interface, the interface on single machine or veneer debugged with needs mismatch.
Common settling mode is to purchase communication interface interconnecting device, and if RS232 turns USB box, RS422/485 turns USB box,
CAN turns USB box etc., these interconnecting devices on the market have a single function, and needs when needing to dock the communication interface of multiple and different forms
Different interconnecting devices is purchased, it is on the one hand more troublesome, and each interconnecting device requires to occupy a USB interface, as upper USB
When interface is limited, it is unfavorable for system integration and test；On the other hand, it multiple and different interconnecting devices is purchased not only increases economic cost and also increase
The management costs of these interconnecting devices of storage management.
Summary of the invention
For at least one defect or Improvement requirement of the prior art, the present invention provides a kind of USB interface-based more
Functional interface interconnecting device can be realized USB interface RS 232 interface, RS422 interface, RS485 interface, CAN interface simultaneously,
The demand for meeting the host computer of USB interface while being communicated with multiple equipment single machines with different communication interface, purpose
It is to solve the problems, such as that existing communication interface interconnecting device has a single function, cannot achieve more mouthfuls of single port turn.
To achieve the above object, according to one aspect of the present invention, a kind of USB interface-based versatile interface is provided
Interconnecting device, including at least one converting unit；The converting unit includes the first USB interface, the first USB controller, processing
Device and at least one RS232 interface conversion circuit, at least one RS422/485 interface conversion circuit and at least one CAN connect
Mouth conversion circuit；
First USB interface is connect by the first USB controller with processor；The first via UART port of the processor
It is connected with RS232 interface conversion circuit, the second tunnel UART port is connected with RS422/485 interface conversion circuit, and CAN mouthfuls connect with CAN
Mouth conversion circuit is connected；
The processor includes USB to connection module and data conversion module；
The USB, for realizing the communication control between processor and the first USB controller, passes through first to connection module
USB controller obtains external host computer and passes through usb protocol data and mark data that the first USB interface is sent；The mark number
According to target protocol type needed for being used to indicate Devices to test；Data conversion module is according to the mark data by the usb protocol
Data, which are converted to protocol data corresponding with the target protocol type and the protocol data is sent to corresponding interface, to be turned
Change circuit.
Preferably, above-mentioned versatile interface interconnecting device, mark data is prestored in data conversion module and target is assisted
Discuss the corresponding relationship between type.
Preferably, the RS232 interface conversion circuit in above-mentioned versatile interface interconnecting device include digital isolator,
RS232 transceiver and RS232 interface；
The first end of the digital isolator is connected with the first via UART port of processor, and second end is received and dispatched by RS232
Device is connected with RS232 interface.
Preferably, the RS422/485 interface conversion circuit in above-mentioned versatile interface interconnecting device include digital isolator,
RS422/485 transceiver and RS422/485 interface；
The first end of the digital isolator is connected with the second tunnel UART port of processor, and second end passes through RS422/485
Transceiver is connected with RS422/485 interface.
Preferably, the CAN interface conversion circuit in above-mentioned versatile interface interconnecting device include CAN controller, number every
From device, CAN transceiver and CAN interface；
The first end of the CAN controller is connected by data/address bus with the CAN of processor mouth, and second end passes through
Digital isolator is connected with the first end of CAN transceiver；The second end of the CAN transceiver is connected with CAN interface.
Preferably, RS232 interface, RS422/485 interface and the CAN interface in above-mentioned versatile interface interconnecting device are adopted
With DB9 connector.
Preferably, above-mentioned versatile interface interconnecting device, converting unit further include toggle switch；The toggle switch is used
Whether the terminal resistance in control CAN bus end accesses CAN interface conversion circuit.
Preferably, the converting unit in above-mentioned versatile interface interconnecting device further includes secondary USB interface and the 2nd USB control
Device processed；The secondary USB interface is connect by the second USB controller with processor, and the upper by outside of processor forwarding is obtained
Machine passes through the usb protocol data and mark data that the first USB interface is sent.
Preferably, above-mentioned versatile interface interconnecting device, the first USB interface and secondary USB interface are connect using different
Mouth type；The interface type includes TYPE A type and TYPE D type.
Preferably, above-mentioned versatile interface interconnecting device includes the converting unit of N number of parallel connection, between adjacent converting unit
It is connected by USB cable；
First USB interface of first converting unit is connected with the USB interface of external host computer, secondary USB interface and the
First USB interface of two converting units is connected；The of first USB interface of i-th converting unit and (i-1)-th converting unit
Two USB interfaces are connected；Wherein, i=3~N, N are the natural number less than or equal to 10.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect:
(1) USB interface-based versatile interface interconnecting device provided by the invention, data conversion module is according to host computer
Usb protocol data are converted to protocol data corresponding with target protocol type needed for Devices to test simultaneously by the mark data of transmission
The protocol data is sent to corresponding interface conversion circuit, to realize selective output RS232 protocol data, RS422
Any one or more agreement in protocol data, RS485 protocol data, data/address bus data and read-write control signal
Data, or above-mentioned various protocols data are exported simultaneously, there is host computer not by a USB interface and one or more
With carrying out data interaction between the Devices to test of communication interface；
(2) USB interface-based versatile interface interconnecting device provided by the invention, supports the parallel connection of multiple converting units
Use, be capable of providing more communication interfaces, enhance Universal and scalability, with good application prospect and
Certain economic benefit.
Detailed description of the invention
Fig. 1 is the structure composition of a converting unit in versatile interface interconnecting device provided in an embodiment of the present invention
Figure；
Connection relationship diagram when Fig. 2 is two converting unit parallel connections provided in an embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
A kind of USB interface-based versatile interface interconnecting device provided by the present invention, including at least one conversion are single
Member；Fig. 1 is the structure composition figure of converting unit provided in this embodiment；As shown in Figure 1, the converting unit includes that the first USB connects
Mouth, the first USB2.0 controller, fpga chip, RS232 interface conversion circuit, RS422/485 interface conversion circuit and CAN interface
Conversion circuit；First USB interface is connect by the first USB2.0 controller with processor；The first via UART port of fpga chip with
RS232 interface conversion circuit is connected, and the second tunnel UART port is connected with RS422/485 interface conversion circuit, CAN mouthfuls and CAN interface
Conversion circuit is connected；
GPIF (general programmable interface) interface by writing the first USB2.0 controller of fpga chip logical AND is realized
Docking, is abstracted into a USB device under external host computer (PC machine) for entire converting unit, so that host computer can directly lead to
Cross the communication between the completion of API Calls USB device driver and converting unit；In the present embodiment, fpga chip includes USB docking mould
Block and data conversion module；
USB for realizing the communication control between the first USB2.0 controller, controls connection module by the first USB2.0
Device processed obtains external host computer and passes through usb protocol data and mark data that the first USB interface is sent；The mark data is for referring to
Target protocol type needed for showing Devices to test；Data conversion module according to the mark data by usb protocol data be converted to
The protocol data is simultaneously sent to corresponding interface conversion circuit by the corresponding protocol data of target protocol type；
The mark data of target protocol type needed for host computer will be used to indicate Devices to test issues each data conversion mould
Block, such as: when the target protocol type needed for one or more Devices to test is RS232, host computer issues mark data
"0"；When the target protocol type needed for one or more Devices to test is RS422, host computer issues mark data " 1 "；When
When target protocol type needed for one or more Devices to test is RS485, host computer issues mark data " 2 "；When one or
When target protocol type needed for multiple Devices to test is CAN, host computer issues mark data " 3 "；When one or more to be measured
When target protocol type needed for equipment is RS232 and RS485, host computer issues mark data " 02 "；When one or more to
When target protocol type needed for measurement equipment includes simultaneously RS232, RS422 or RS485, CAN, host computer issues mark data
" 013 " or " 023 "；Certainly, user can use different mark data representations according to self-demand, and the present embodiment is not made
Limitation；
The corresponding relationship between above-mentioned mark data and target protocol type is prestored in data conversion module；When receiving
When mark data " 0 ", received usb protocol data are converted to RS232 protocol data and by RS232 agreements by data conversion module
Data are sent to RS232 interface conversion circuit；
When receiving mark data " 1 ", received usb protocol data are converted to RS422 agreement by data conversion module
RS422 protocol data is simultaneously sent to RS422/485 interface conversion circuit by data；
When receiving mark data " 2 ", received usb protocol data are converted to RS485 agreement by data conversion module
RS485 protocol data is simultaneously sent to RS422/485 interface conversion circuit by data；
When receiving mark data " 3 ", received usb protocol data are converted to 8 data/ground by data conversion module
Data/address bus data and read-write control signal are simultaneously sent to CAN interface conversion by location bus data and read-write control signal
Circuit；
When receiving mark data " 013 ", data conversion module is respectively converted to received usb protocol data
RS232 protocol data, RS422 protocol data, data/address bus data and read-write control signal, and send them to pair
The interface conversion circuit answered.
As a result, the output RS232 protocol data of the versatile interface interconnecting device property of can choose provided in this embodiment,
Any one or more in RS422 protocol data, RS485 protocol data, data/address bus data and read-write control signal
Protocol data can also export above-mentioned various protocols data simultaneously, and host computer is allow to pass through a USB interface and one or more
Data interaction is carried out between a Devices to test with different communication interface.
RS232 interface conversion circuit includes digital isolator, RS232 transceiver and RS232 interface；The of digital isolator
One end is connected with the first via UART port of processor, and second end is connected by RS232 transceiver with RS232 interface.Data conversion
The RS232 protocol data of module output is sent into RS232 transceiver, RS232 transceiver after digital isolator carries out electrical isolation
RS232 protocol data is connected to RS232 interface, the communication interface of the RS232 interface as test Devices to test.
RS422/485 interface conversion circuit includes digital isolator, RS422/485 transceiver and RS422/485 interface；Number
The first end of word isolator is connected with the second tunnel UART port of processor, and second end passes through RS422/485 transceiver and RS422/
485 interfaces are connected.The RS422/485 protocol data of data conversion module output is sent into after digital isolator carries out electrical isolation
RS422 or RS485 protocol data is connected to RS422/485 interface, is used as by RS422/485 transceiver, RS422/485 transceiver
Test the communication interface of the RS422/485 interface of Devices to test.
CAN interface conversion circuit includes CAN controller, digital isolator, CAN transceiver and CAN interface；CAN controller
First end be connected with the CAN of processor mouth by data/address bus, second end passes through digital isolator and CAN transceiver
First end be connected；The second end of the CAN transceiver is connected with CAN interface.8 data/ground of data conversion module output
Location bus data and read-write control signal are transmitted to digital isolator by CAN controller, and the signal after carrying out electrical isolation is sent
Enter CAN transceiver, data/address bus data and read-write control signal are connected to CAN interface by CAN transceiver, are used as test
The communication interface of the CAN interface of Devices to test.In addition, the present embodiment is provided with toggle switch on the shell of converting unit, use
Whether circuit is accessed in the terminal resistance of control CAN bus；After terminal resistance is accessed circuit, be conducive to improve anti-interference energy
Power, it is ensured that CAN bus rapidly enters recessive state；And improve the quality of transmission signal.
In the present embodiment, RS232 interface, RS422/485 interface and CAN interface in versatile interface interconnecting device are adopted
With DB9 connector.
As shown in Figure 1, in versatile interface interconnecting device provided by the present embodiment, RS232, RS422/ of converting unit
485, CAN interface has all only picked out all the way, it is contemplated that the transmission speed of USB2.0 interface can reach 480Mbps, and RS232
Rate be generally 19200bps, RS422/485 is typically up to up to 2.5Mbps, and the rate of CAN is typically up to used
1Mbps, operation while supporting three or more such interfaces completely；If it is necessary, can under the premise of meeting transmission rate
In a manner of by increasing RS232 interface conversion circuit, RS422/485 interface conversion circuit and CAN interface conversion circuit, extension
Out more RS232, RS485 422, CAN interface comes out；The present embodiment considers the finite volume of conversion equipment, therefore three
The interface of type is respectively arranged one, but a converting unit has multiple RS232, RS422/485, the structure of CAN interface same
Sample is within protection scope of the present invention.
One as the present embodiment is preferred, and the converting unit in above-mentioned versatile interface interconnecting device further includes second
USB interface and the second USB controller；Secondary USB interface is connect by the second USB controller with fpga chip, and FPGA core is obtained
Piece forwarding passes through the usb protocol data and mark data that the first USB interface is sent by external host computer.First USB interface and
Secondary USB interface uses different interface types, and TYPE A type, TYPE is respectively adopted in such as the first USB interface and secondary USB interface
D type interface, to show difference and Anti-misplug.First USB interface is for connecting host computer so as to the RS232 of host computer device under test
Interface, RS485/422 interface, CAN interface are debugged；Secondary USB interface for will from the received data forwarding of host computer to
The data that other converting units are sent are transmitted to host computer by other converting units, so that two or more converting units are all logical
The first USB interface for crossing one of converting unit is communicated with host computer.
If Devices to test need RS232, RS422/485 to be tested, the quantity of CAN interface are more than one, single to convert
When unit is unable to satisfy, two or more converting units, which are together in parallel, will provide more communication interfaces.Fig. 2
Connection relationship diagram when being two converting unit parallel connections provided in an embodiment of the present invention, as shown in Fig. 2, by Devices to test
Interface to be measured is connected with the corresponding communication interface of two converting units respectively, using a USB cable by the second converting unit
First USB interface is connected on the secondary USB interface of the first converting unit, and the first USB interface of the first converting unit is connected
To the USB interface of host computer.
After parallel connection, two converting units are finally all communicated by the USB interface of the first converting unit with host computer, so not
It only realizes host computer while testing the purpose of multiple and different communication interfaces, and the USB for also saving the host computer of occupancy connects
The quantity of mouth.
The method that the parallel-connection structure of more than two converting unit is referred to Fig. 2, successively by the of next stage converting unit
One USB interface is connected to the secondary USB interface of upper level converting unit, and the forwarding of data is completed by upper level converting unit,
To can finally only use the USB interface that one is connected with host computer to test more RS232, RS422/485, CAN interface.
When used in parallel using multiple converting units, each converting unit is individually powered using individual power supply.
In above-described embodiment, fpga chip uses xilinx company sapartan series of X C6SL25T；RS422 transceiver is adopted
With the MAX490 chip of MAXIM company；CAN controller uses the SJA1000 chip of NXP company；Digital isolator is public using ADI
The ADUM2201 chip of department；The DCR010505U chip that DC-DC uses TI company is isolated；USB controller uses Cypress company
The CY7C68013 chip of EZ-USB FX2 family.
Compared to existing communication interface interconnecting device, USB interface-based versatile interface switching provided by the invention is set
It is standby to overcome the weakness that similar product on the market has a single function, and feature used in parallel is supported to make its Universal and scalability
Enhanced, with good application prospect with certain economic benefit.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of USB interface-based versatile interface interconnecting device, which is characterized in that including at least one converting unit；Institute
State converting unit include the first USB interface, the first USB controller, processor and at least one RS232 interface conversion circuit,
At least one RS422/485 interface conversion circuit and at least one CAN interface conversion circuit；
First USB interface is connect by the first USB controller with processor；The first via UART port of the processor with
RS232 interface conversion circuit is connected, and the second tunnel UART port is connected with RS422/485 interface conversion circuit, CAN mouthfuls and CAN interface
Conversion circuit is connected；
The processor includes USB to connection module and data conversion module；
The USB for realizing the communication control between processor and the first USB controller, controls connection module by the first USB
Device processed obtains external host computer and passes through usb protocol data and mark data that the first USB interface is sent；The mark data is used for
Target protocol type needed for indicating Devices to test；The data conversion module is according to the mark data by the usb protocol number
According to being converted to protocol data corresponding with the target protocol type and the protocol data be sent to corresponding interface conversion
Circuit.
2. versatile interface interconnecting device as described in claim 1, which is characterized in that prestored in the data conversion module
Corresponding relationship between mark data and target protocol type.
3. versatile interface interconnecting device as claimed in claim 1 or 2, which is characterized in that the RS232 interface conversion circuit
Including digital isolator, RS232 transceiver and RS232 interface；
The first end of the digital isolator is connected with the first via UART port of processor, second end by RS232 transceiver with
RS232 interface is connected.
4. versatile interface interconnecting device as claimed in claim 3, which is characterized in that the RS422/485 interface conversion electricity
Road includes digital isolator, RS422/485 transceiver and RS422/485 interface；
The first end of the digital isolator is connected with the second tunnel UART port of processor, and second end is received and dispatched by RS422/485
Device is connected with RS422/485 interface.
5. versatile interface interconnecting device as claimed in claim 4, which is characterized in that the CAN interface conversion circuit includes
CAN controller, digital isolator, CAN transceiver and CAN interface；
The first end of the CAN controller is connected by data/address bus with the CAN of processor mouth, and second end passes through number
Isolator is connected with the first end of CAN transceiver；The second end of the CAN transceiver is connected with CAN interface.
6. versatile interface interconnecting device as claimed in claim 5, which is characterized in that the RS232 interface, RS422/485
Interface and CAN interface are all made of DB9 connector.
7. versatile interface interconnecting device as described in claim 1 or 6, which is characterized in that the converting unit further includes dialling
Code switch；Whether the terminal resistance that the toggle switch is used to control CAN bus end accesses CAN interface conversion circuit.
8. versatile interface interconnecting device as described in claim 1 or 6, which is characterized in that the converting unit further includes
Two USB interfaces and the second USB controller；The secondary USB interface is connect by the second USB controller with processor, at acquisition
That manages device forwarding passes through the usb protocol data and mark data that the first USB interface is sent by external host computer.
9. versatile interface interconnecting device as claimed in claim 8, which is characterized in that the converting unit including N number of parallel connection, phase
It is connected between adjacent converting unit by USB cable；
First USB interface of first converting unit is connected with the USB interface of external host computer, secondary USB interface and second
First USB interface of converting unit is connected；The second of first USB interface of i-th converting unit and (i-1)-th converting unit
USB interface is connected；Wherein, i=3~N, N are the natural number less than or equal to 10.
10. versatile interface interconnecting device as claimed in claim 9, which is characterized in that first USB interface and second
USB interface uses different interface types；The interface type includes TYPE A type and TYPE D type.
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| CN201910420744.1A CN110221997A (en) | 2019-05-20 | 2019-05-20 | A kind of USB interface-based versatile interface interconnecting device |
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| CN201910420744.1A CN110221997A (en) | 2019-05-20 | 2019-05-20 | A kind of USB interface-based versatile interface interconnecting device |
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| CN110838850A (en) * | 2019-11-14 | 2020-02-25 | 中国电子科技集团公司第五十四研究所 | Group-path interface conversion device |
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Application publication date: 20190910 |