CN110244630A - Serial server based on programmable logic device online acquisition serial interface signal - Google Patents
Serial server based on programmable logic device online acquisition serial interface signal Download PDFInfo
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- CN110244630A CN110244630A CN201910553875.7A CN201910553875A CN110244630A CN 110244630 A CN110244630 A CN 110244630A CN 201910553875 A CN201910553875 A CN 201910553875A CN 110244630 A CN110244630 A CN 110244630A
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- programmable logic
- logic device
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- serial
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
Abstract
The invention belongs to serial communication equipment technical fields, disclose the serial server based on programmable logic device online acquisition serial interface signal, including SCM system, level shifting circuit, Ports Serial Communication Ports, Ethernet interface system and power-supply system, power-supply system is used for the power supply of entire serial server, Ethernet interface system passes sequentially through SCM system, level shifting circuit is connect with Ports Serial Communication Ports, further include: signal shift switch, analog front circuit, adc circuit, programmable logic device system and human-computer interaction module, the present invention, which realizes, to carry out online acquisition to serial interface signal waveform, obtain serial ports instantaneous operating conditions, user is facilitated to configure communication system.
Description
Technical field
The invention belongs to serial communication equipment technical fields, more particularly to are based on programmable logic device online acquisition serial ports
The serial server of interface signal.
Background technique
Present serial server is widely used to Industry Control, instrument, instrument, multi-media network, electromechanical integration and produces
The numerous areas such as product.But since RS-232, RS-485 and RS-422 interface are easy to be former by electrostatic, lightning stroke, common mode interference etc.
Because causing communication failure even to damage equipment, and each equipment spacing from farther out, line it is more complicated.Common serial server
There is no rs 232 serial interface signal acquisition and display function, whether equipment is working properly to be difficult to judge.And each equipment spacing is from farther out, even
Line is more complicated, if equipment is out of order, faulty equipment investigation and service work are also difficult to complete.
Summary of the invention
The embodiment of the present invention is designed to provide the string based on programmable logic device online acquisition serial interface signal
Mouth server can carry out online acquisition to serial interface signal waveform, obtain serial ports instantaneous operating conditions, facilitate user to logical
Letter system is configured.
The embodiments of the present invention are implemented as follows:
Based on the serial server of programmable logic device online acquisition serial interface signal, including SCM system, electricity
Flat conversion circuit, Ports Serial Communication Ports, Ethernet interface system and power-supply system, power-supply system is for entire serial server
Power supply, Ethernet interface system pass sequentially through SCM system, level shifting circuit and Ports Serial Communication Ports and connect, further includes:
Signal shift switch, analog front circuit, adc circuit, programmable logic device system and human-computer interaction module, programmable logic
Device system is connect with SCM system, human-computer interaction module and the display screen interface of programmable logic device system and GPIO mouthfuls
Connection, the tie point connection between the input terminal and level shifting circuit and Ports Serial Communication Ports of signal shift switch, output
End passes sequentially through analog front circuit, adc circuit and programmable logic device system and connects, programmable logic device system
GPIO mouthfuls connect with the control signal input pin of signal shift switch, analog front circuit and adc circuit respectively, programmable to patrol
It collects device system and SCM system carries out data interaction, signal shift switch connects the serial ports of collected Ports Serial Communication Ports
Mouth signal waveform is defeated by analog front circuit and carries out improving input impedance processing and amplitude conditioning, carries out modulus through adc circuit and turns
After changing, programmable logic device system is inputed to, programmable logic device system handles the signal of acquisition, stores signal
Simultaneously to human-computer interaction module for showing, human-computer interaction module is also used to receive user defeated signal output waveform data Wave data
Programmable logic device system is managed for configuration in the control instruction entered；SCM system accesses programmable logic device system
System, reads the signal waveform data, and programmable logic device system exports the signal waveform data to SCM system.
Wherein, signal shift switch is relay or analog switch.
The serial server that the embodiment of the present invention proposes can pass through letter with the signal waveform of online real time collecting serial interface
Number waveform can quickly judge whether the equipment of current serial interface connection is working properly.It, can be with if equipment is working properly
The parameters such as its baud rate are judged by its signal waveform issued, and user is facilitated to configure communication system, this serial ports clothes
The signal waveform data of required acquisition can also be stored into a mass-memory unit according to the setting of user and be used by business device
Investigation communicates out of order time point after communication failure, to find out failure cause.
Detailed description of the invention
Fig. 1 is that the present invention is based on the serial server system frames of programmable logic device online acquisition serial interface signal
Figure.
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.
Specific implementation of the invention is described in detail below in conjunction with specific embodiment:
Based on the serial server of programmable logic device online acquisition serial interface signal, including SCM system, electricity
Flat conversion circuit, Ports Serial Communication Ports, Ethernet interface system and power-supply system, power-supply system is for entire serial server
Power supply, Ethernet interface system pass sequentially through SCM system, level shifting circuit and Ports Serial Communication Ports and connect, further includes:
Signal shift switch, analog front circuit, adc circuit, programmable logic device system and human-computer interaction module, programmable logic
Device system is connect with SCM system, human-computer interaction module and the display screen interface of programmable logic device system and GPIO mouthfuls
Connection, the tie point connection between the input terminal and level shifting circuit and Ports Serial Communication Ports of signal shift switch, output
End passes sequentially through analog front circuit, adc circuit and programmable logic device system and connects, programmable logic device system
GPIO mouthfuls connect with the control signal input pin of signal shift switch, analog front circuit and adc circuit respectively, programmable to patrol
It collects device system and SCM system carries out data interaction, signal shift switch connects the serial ports of collected Ports Serial Communication Ports
Mouth signal waveform is defeated by analog front circuit and carries out improving input impedance processing and amplitude conditioning, carries out modulus through adc circuit and turns
After changing, programmable logic device system is inputed to, programmable logic device system handles the signal of acquisition, stores signal
Simultaneously to human-computer interaction module for showing, human-computer interaction module is also used to receive user defeated signal output waveform data Wave data
Programmable logic device system is managed for configuration in the control instruction entered；SCM system accesses programmable logic device system
System, reads the signal waveform data, and programmable logic device system exports the signal waveform data to SCM system.
As shown in Figure 1, support online acquisition serial interface signal serial server specific implementation, mainly by
Following sections composition:
1, SCM system 1
SCM system 1 has the UART interface of at least 1 road Transistor-Transistor Logic level, and main function is will be electric from level conversion
The UART signal data packing for the Transistor-Transistor Logic level that road receives is packaged into ethernet data frame and is sent to Ethernet interface system, and
The UART signal that the ethernet data frame comprising UART data that Ethernet system is sended over changes into Transistor-Transistor Logic level is sent to electricity
Flat conversion circuit.If serial server serial interface signal is two-wire system RS-485 signal, SCM system 1 also needs to provide
The receiving of RS-485 and sending direction control signal.
SCM system 1 and 8 phase of Ethernet interface system 4, level shifting circuit 2 and programmable logic device system
Even.
2, level shifting circuit 2
Level shifting circuit 2 be used for by SCM system 1 export Transistor-Transistor Logic level UART signal be converted to RS-232 (or
RS-485, RS-422) rs 232 serial interface signal of level exported again to Ports Serial Communication Ports 3, and will be received from Ports Serial Communication Ports 3
The UART signal that the rs 232 serial interface signal of RS-232 (or RS-485, RS-422) level switchs to Transistor-Transistor Logic level is exported to SCM system
1；If serial interface signal is 2 line RS-485 signal, level shifting circuit 2 further includes that RS-485 receives data and transmission
The directional control circuit of data.If serial ports supports isolation, level shifting circuit 2 further includes optocoupler or magnetic coupling device
Etc signal isolation device.
2 one end of level shifting circuit is connected with single-chip microcontroller 1, and the other end is connected with Ports Serial Communication Ports 3.
3, Ports Serial Communication Ports 3
Ports Serial Communication Ports 3 are the external serial interfaces of serial server.Ports Serial Communication Ports 3 and level shifting circuit 2
Be connected, be typically in the form of plug-in type connection terminal or DB9 terminal or RJ45 socket etc., signal can be RS-232 or
Person's RS-485 or RS-422 signal.
4, Ethernet interface system 4 (IMXRT1050 in figure)
The function of Ethernet interface system 4 is to realize the interconnection of SCM system 1 and Ethernet.General SCM system 1
As soon as an ethernet mac unit can be integrated, an Ethernet switching chip or ethernet PHY and its peripheral circuit are needed at this time
And corresponding ethernet interface circuit (such as network transformer, RJ45 interface or optical module) completes SCM system 1
With the interconnection of Ethernet.Not only have ethernet mac unit inside some single-chip microcontrollers, be also integrated with ethernet PHY unit, at this time with
Too network interface system 4 only needs ethernet interface circuit (such as network transformer, RJ45 interface or optical module).
5, signal shift switch 5
Signal shift switch 5 is used to select that the signal acquired is needed to be input to analog front circuit 6.But under some scenes
Can not use signal shift switch 5, such as serial server only one two-wire system RS-485 signal serial ports when because need
There are two the signals of acquisition, the signal that need to be acquired directly can be connected to the analog front circuit in two channels without using
Signal shift switch.Signal shift switch 5 can be relay, analog switch etc..If the serial ports of serial server needs to prop up
Electrical isolation is held, then 5 circuit of signal shift switch also includes linear signal isolator part, such as linear optical coupling device etc..
The signal output end of signal shift switch 5 is connected with the input terminal of analog front circuit 6；Signal shift switch 5
Signal input part is connected with Ports Serial Communication Ports 3；The control signal input pin and programmable logic device of signal shift switch 5
The GPIO pin of system 8 is connected and by the control of programmable logic device system 8.
6, analog front circuit 6
First effect of analog front circuit 6 is to improve signal input impedance, to reduce the access of adc circuit 7 to quilt
Acquire the influence of signal；Second effect is improved collected signal, and collected signal is adjusted to suitable amplitude
After be output to adc circuit 7 carry out analog-to-digital conversion, to improve the precision of signal acquisition；Third effect is by amplifying or contracting
The amplitude of small collected signal improves the collectable range of input signal.
The signal input part of analog front circuit 6 is connected with signal shift switch 5；The signal of analog front circuit 6 exports
End is connected with 7 input terminal of adc circuit；The control signal input pin of analog front circuit 6 and programmable logic device system 8
GPIO pin is connected and by the control of programmable logic device system 8.
7, adc circuit 7
The signal that analog front circuit exports is converted to number under the control of programmable logic device system by adc circuit 7
Word signal.Adc circuit 7 is made of ADC conversion chip and its peripheral circuit, the ADC core of optional high speed as needed or low speed
Piece.
The input terminal of adc circuit 7 is connected with the output end of analog front circuit；The output end of adc circuit 7 is patrolled with programmable
Device system is collected to be connected；
8, programmable logic device system 8
Programmable logic device system 8 controls the work of signal shift switch 5, analog front circuit 6, adc circuit 7,
And the digital signal of the output of adc circuit 7 is handled, export collected signal waveform data.The programmable logic device system 8
Inside includes massive store chip, can will be carried out in collected signal waveform data storage to storage equipment for user's later period
It checks；Optionally, the programmable logic device system 8 includes the GPIO interface for receiving user control signal；Optionally,
The programmable logic device system 8 also has display screen interface.
9, human-computer interaction module 9
Human-computer interaction module 9 is mainly comprising display screen, key, knob and LED light etc..Display screen is for showing system
System menu and collected signal waveform；LED light may be used to indicate the current working condition of serial server；Key and rotation
Button is then used to receive the control instruction of user's input.Display screen, key, knob and the LED indication that human-computer interaction module 9 is included
The components such as lamp are all that optionally, can be configured according to the demand of user.
Human-computer interaction module 9 passes through forms and the programmable logic such as display screen interface, GPIO mouthfuls or other serial line interfaces
Device system 8 is connected.
10, power-supply system 10
Power-supply system 10 is used to for the power supply of external world's input being converted into after the different low-tension supply of multichannel as this serial port service
Each circuit module power supply inside device.
In conclusion serial server proposed by the invention can complete Ethernet data and the mutual of serial data turns
It changes, while can also acquire and show the signal waveform at serial interface.But the realization side of serial server proposed by the invention
Case is not limited only to this, can also there is other schemes and specific connection type.
The present invention proposes that the serial server of online acquisition serial interface signal waveform, implementation are in common serial ports
Increase the circuit of signal acquisition and display on the basis of server.The increased circuit of institute is connected with serial interface, such serial ports clothes
Business device is also capable of real-time acquisition signal waveform at serial interface when working normally, and can as desired by display screen or
Person's network management page shows, can also by collected signal waveform data storage to storage equipment for user's later period
It is checked.
It is increased acquisition and display circuit mainly have signal shift switch, analog front circuit, adc circuit, can compile
Multiple functional modules such as journey logical device system and human-computer interaction module, these functional modules can be selected according to actual needs
With.Wherein the major function of each functional module is as follows:
(1), signal shift switch: signal shift switch is connected with serial interface, the signal for selecting to need to acquire, institute
Stating signal shift switch can be relay, analog switch etc..If the serial interface of serial server need support electrically every
From then the signal shift switch circuit also includes linear signal isolator part, such as linear optical coupling device etc..
(2), analog front circuit: including the power amplification of impedance inverter circuit, gain controllable inside analog front circuit
The circuits such as device, the effect of analog front circuit are to improve input impedance, influence of the reduction system to that need to acquire signal.It is described
Analog front circuit is connected with signal shift switch, for improving the input impedance of signal acquisition circuit, reduces signal acquisition electricity
Influence of the road to collected signal, and carry out collected signal under the control of user or programmable logic device system
It is input to adc circuit after conditioning and carries out analog-to-digital conversion.
(3), adc circuit: the letter that adc circuit exports analog front circuit under the control of programmable logic device system
Number being converted to digital signal is output to programmable logic device system.Adc circuit is by ADC conversion chip and its peripheral circuit structure
At the ADC chip of optional high speed as needed or low speed.
(4), programmable logic device system: the programmable logic device system is aobvious for controlling signal acquisition and waveform
The work of each section circuit shown, and store and process collected signal data；Programmable logic device system controls letter
The work of number switching switch, analog front circuit, each functional module such as adc circuit, while the number of also processing ADC output is believed
Number, and export collected signal waveform data.Optionally, the programmable logic device internal system includes massive store
Chip can will be checked in collected signal waveform data storage to storage equipment for user in the later period；Optionally, described can
Programmed logic device internal system includes the GPIO interface for receiving user control signal；Optionally, the programmable logic
Device system also has display screen interface.
(5), human-computer interaction module: human-computer interaction module mainly includes display screen, key, knob and LED light etc..
Display screen is used for display system menu and collected signal waveform；It is current that LED light may be used to indicate serial server
Working condition；Key and knob are then used to receive the control instruction of user's input.The component that human-computer interaction module is included all is
Optionally, it can be configured according to the demand of user.User can enter the network of serial server proposed by the present invention
Administration page checks the waveform of rs 232 serial interface signal that is that serial interface is sent or receiving.
In addition to this, serial server proposed by the present invention further includes functional module possessed by common serial ports, i.e. ether
The modules such as network interface system, SCM system, level shifting circuit, serial interface and power-supply system.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to restrict the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (2)
1. based on the serial server of programmable logic device online acquisition serial interface signal, including SCM system, level
Conversion circuit, Ports Serial Communication Ports, Ethernet interface system and power-supply system, power-supply system are used for the confession of entire serial server
Electricity, Ethernet interface system pass sequentially through SCM system, level shifting circuit and Ports Serial Communication Ports and connect, and feature exists
In, further includes: signal shift switch, analog front circuit, adc circuit, programmable logic device system and human-computer interaction module,
Programmable logic device system is connect with SCM system, and human-computer interaction module and the display screen of programmable logic device system connect
Mouth and GPIO mouthfuls of connections, the tie point between the input terminal and level shifting circuit and Ports Serial Communication Ports of signal shift switch connect
It connects, output end passes sequentially through analog front circuit, adc circuit and programmable logic device system and connects, programmable logic device
The GPIO mouth of part system is connect with the control signal input pin of signal shift switch, analog front circuit and adc circuit respectively,
Programmable logic device system and SCM system carry out data interaction, and signal shift switch is by collected Ports Serial Communication Ports
Serial interface signal waveform be defeated by analog front circuit carry out improve input impedance processing and amplitude conditioning, through adc circuit into
After row analog-to-digital conversion, programmable logic device system is inputed to, programmable logic device system handles the signal of acquisition,
Simultaneously to human-computer interaction module for showing, human-computer interaction module is also used to connect signal output waveform data storage signal waveform data
Programmable logic device system is managed for configuration in the control instruction for receiving user's input；SCM system accesses programmable logic
Device system, reads the signal waveform data, and programmable logic device system exports the signal waveform to SCM system
Data.
2. the serial server according to claim 1 based on programmable logic device online acquisition serial interface signal,
It is characterized by: signal shift switch is relay or analog switch.
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| CN201910553875.7A CN110244630A (en) | 2019-06-21 | 2019-06-21 | Serial server based on programmable logic device online acquisition serial interface signal |
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Cited By (3)
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| CN111198527A (en) * | 2020-01-15 | 2020-05-26 | 北京实干兴邦科技有限公司 | FPGA-based GPIO output state control device, control method and application |
| CN112363423A (en) * | 2020-10-13 | 2021-02-12 | 北京无线电测量研究所 | Control interface card for ferrite electric control device |
| CN117609144A (en) * | 2024-01-23 | 2024-02-27 | 深圳市三旺通信股份有限公司 | RS485, RS422 and RS232 three-in-one interface multiplexing circuit |
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| CN111198527A (en) * | 2020-01-15 | 2020-05-26 | 北京实干兴邦科技有限公司 | FPGA-based GPIO output state control device, control method and application |
| CN111198527B (en) * | 2020-01-15 | 2021-03-30 | 北京实干兴邦科技有限公司 | FPGA-based GPIO output state control device, control method and application |
| CN112363423A (en) * | 2020-10-13 | 2021-02-12 | 北京无线电测量研究所 | Control interface card for ferrite electric control device |
| CN117609144A (en) * | 2024-01-23 | 2024-02-27 | 深圳市三旺通信股份有限公司 | RS485, RS422 and RS232 three-in-one interface multiplexing circuit |
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Application publication date: 20190917 |
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