CN105302759A - Automatic switching circuit device and method of 485 communication chip transmitting and receiving data - Google Patents
Automatic switching circuit device and method of 485 communication chip transmitting and receiving data Download PDFInfo
- Publication number
- CN105302759A CN105302759A CN201510725148.6A CN201510725148A CN105302759A CN 105302759 A CN105302759 A CN 105302759A CN 201510725148 A CN201510725148 A CN 201510725148A CN 105302759 A CN105302759 A CN 105302759A
- Authority
- CN
- China
- Prior art keywords
- data
- resistance
- pin
- triode
- data receiver
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- G06F13/4004—Coupling between buses
- G06F13/4022—Coupling between buses using switching circuits, e.g. switching matrix, connection or expansion network
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Telephonic Communication Services (AREA)
Abstract
The invention discloses an automatic switching circuit device and method of 485 communication chip transmitting and receiving data. The device comprises that the data transmitting pin of a 485 communication chip is connected with a data receiving end of a central processing unit through a first resistor; the other pins of the 485 communication chip are connected with the data transmitting end of the central processing unit through a charging circuit; the charging circuit comprises an audion, an electrolytic capacitor, a power supply, a second resistor and a third resistor, wherein the third resistor is used for carrying out current limitation on the audion; one end of the third resistor is connected with the B electrode of the audion, and the other end of the third resistor is connected with the data transmitting end of the central processing unit; the E electrode of the audion is connected with the power supply; the C electrode of the audion is connected with the anode of the electrolytic capacitor; the cathode of the electrolytic capacitor is earthed; the second resistor is connected with the electrolytic capacitor in parallel and is connected with the anode and the cathode of the electrolytic capacitor; a data receiving enabling pin is connected with a data transmitting enabling pin and is connected with the C electrode of the audion; and the data receiving pin is connected with the B electrode of the audion.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of 485 communication chip transceiving data automatic switch-over circuit device and methods.
Background technology
Along with electronic product functional requirement gets more and more, the work that in electronic product, micro-control unit (MicroControlUnit, referred to as MCU) is born gets more and more, and the I/O mouth of needs also gets more and more.The I/O mouth of common MCU is generally 10 to about 35, and the load of control and input are all many, and I/O mouth is general all not enough.Therefore the I/O some being controlled to peripheral hardware is needed to carry out reuse plan, to reduce taking of I/O mouth.Control needed for 485 communication chips generally needs 3 I/O mouths to control, i.e. data transmission, data receiver and transmission and reception switch.
Particularly, Fig. 1 is the circuit diagram that 485 communication datas of 3 I/O in prior art send and receive, as shown in Figure 1, DI, DO, RE, DE of 485 control with different I/O respectively, namely UART_TXD carries out data transmission, UART_RXD carries out data receiver, and UART_EN carries out communication data transmitting-receiving conversion.Work schedule when needing the I/O mouth of 3 MUC to operate 485 communication.
Current great majority design is all that the I/O mouth of employing 3 MCU controls, and sends, data receiver and the control that sends and receive controls respectively with different I/O mouths to data.Hardware takies an I/O more, and need independent software to process transceiving data, in order to avoid conflict.
Summary of the invention
In view of 485 communication chips in prior art need the I/O mouth of 3 MCU to control and the problem needing independent software to process, propose the present invention to provide a kind of 485 communication chip transceiving data automatic switch-over circuit device and methods overcoming the problems referred to above or solve the problem at least in part.
The invention provides a kind of 485 communication chip transceiving data automatic switch-over circuit devices, comprising:
The data transmitting pin of 485 communication chips is connected with the data receiver of central processing unit by the first resistance; The data receiver enable pin of 485 communication chips, data send enable pin and data receiver enable pin is connected with the data sending terminal of central processing unit by charging circuit;
Charging circuit comprises: triode, electrochemical capacitor, power supply, second resistance and the 3rd resistance, wherein, 3rd resistance is used for for triode current limliting, one end is connected with the B pole of triode, the other end is connected with the data sending terminal of central processing unit, the E level of triode connects power supply, the C pole of triode connects the positive pole of electrochemical capacitor, the minus earth of electrochemical capacitor, second resistance is in parallel with electrochemical capacitor, be connected with the positive and negative polarities of electrochemical capacitor, data receiver enable pin and data send enable pin and are connected, and be connected with the C pole of triode, data receiver pin is connected with data sending terminal.
Present invention also offers a kind of 485 communication chip transceiving data automatic switching methods, for above-mentioned 485 communication chip transceiving data automatic switch-over circuit devices, comprise: when 485 communication chips send data, triode charges to electrochemical capacitor, make data receiver enable pin and data send enable pin and be in high level, enable data sends pin; When 485 communication chips do not send data, electrochemical capacitor is by the second conductive discharge, and make data receiver enable pin and data send enable pin and be in low level, enable data receives pin.
Beneficial effect of the present invention is as follows:
Realize 485 communication data transmitting-receivings by the circuit arranging a discharge and recharge in the data transmitting pin of 485 communication chips to automatically switch, solving 485 communication chips in prior art needs the I/O mouth of 3 MCU to control and the problem needing independent software to process, both taking of the I/O of MCU had been decreased, not be used in I/O mouth not enough time increase extended chip again, reduce cost, also software control that simultaneously need not be independent, decreases the workload of software.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to technological means of the present invention can be better understood, and can be implemented according to the content of instructions, and can become apparent, below especially exemplified by the specific embodiment of the present invention to allow above and other objects of the present invention, feature and advantage.
Accompanying drawing explanation
By reading hereafter detailed description of the preferred embodiment, various other advantage and benefit will become cheer and bright for those of ordinary skill in the art.Accompanying drawing only for illustrating the object of preferred implementation, and does not think limitation of the present invention.And in whole accompanying drawing, represent identical parts by identical reference symbol.In the accompanying drawings:
Fig. 1 is the circuit diagram that 485 communication datas of 3 I/O in prior art send and receive;
Fig. 2 is the structural representation of 485 communication chip transceiving data automatic switch-over circuit devices of the embodiment of the present invention;
Fig. 3 is the preferred structure schematic diagram of 485 communication chip transceiving data automatic switch-over circuit devices of the embodiment of the present invention;
Fig. 4 is that the communication data of the embodiment of the present invention sends and receives the schematic diagram of automatic switching waveform;
Fig. 5 is 485 communication chip internal logic schematic diagram of the embodiment of the present invention;
Fig. 6 is the process flow diagram of 485 communication chip transceiving data automatic switching methods of the embodiment of the present invention.
Embodiment
Below with reference to accompanying drawings exemplary embodiment of the present disclosure is described in more detail.Although show exemplary embodiment of the present disclosure in accompanying drawing, however should be appreciated that can realize the disclosure in a variety of manners and not should limit by the embodiment set forth here.On the contrary, provide these embodiments to be in order to more thoroughly the disclosure can be understood, and complete for the scope of the present disclosure can be conveyed to those skilled in the art.
The I/O mouth of 3 MCU is needed to control and the problem needing independent software to process to solve 485 communication chips in prior art, the invention provides a kind of 485 communication chip transceiving data automatic switch-over circuit device and methods, below in conjunction with accompanying drawing and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, do not limit the present invention.
Device embodiment
According to embodiments of the invention, provide a kind of 485 communication chip transceiving data automatic switch-over circuit devices, Fig. 2 is the structural representation of 485 communication chip transceiving data automatic switch-over circuit devices of the embodiment of the present invention, as shown in Figure 2, the data transmitting pin 10 of 485 communication chips 1 is connected with the data receiver of central processing unit by the first resistance 2; The data receiver enable pin 12 of 485 communication chips 1, data send enable pin 14 and data receiver pin one 6 is connected with the data sending terminal of central processing unit by charging circuit 3;
Charging circuit 3 comprises: triode 30, electrochemical capacitor 32, power supply 34, second resistance 36, 3rd resistance 38, wherein, 3rd resistance 38 is for being triode 30 current limliting, one end is connected with the B pole of triode 30, the other end is connected with the data sending terminal of central processing unit, the E level of triode 30 connects power supply 34, the C pole of triode 30 connects the positive pole of electrochemical capacitor 32, the minus earth of electrochemical capacitor 32, second resistance 36 is in parallel with electrochemical capacitor 32, be connected with the positive and negative polarities of electrochemical capacitor 32, data receiver enable pin 12 and data send enable pin 14 and are connected, and be connected with the C pole of triode 30, data receiver pin one 6 is connected with the data sending terminal of central processing unit.
Preferably, in order to ensure that charging circuit is safer, charging circuit 3 comprises further:
Be arranged at the 4th resistance between described data receiver pin one 6 and described data sending terminal, described data receiver pin one 6 is connected by described 4th resistance with described data sending terminal, and described 4th resistance is used for described charging circuit 3 to isolate with external circuit.
Be arranged at the 5th resistance between described data receiver enable pin 12 and the C pole of described triode 30, described data receiver enable pin 12 and described data send after enable pin 14 is connected, be connected with the C pole of described triode 30 by described 5th resistance, described 5th resistance is used for described charging circuit 3 to isolate with external circuit
Preferably, in embodiments of the present invention, the resistance of the first resistance 2 is 1K, and the resistance of the second resistance 36 is 6.8K, and the resistance of the 3rd resistance 38 is 1K.The resistance of the 4th resistance is 100 Europe, and the resistance of the 5th resistance is 1K.
Below in conjunction with accompanying drawing, the technique scheme of the embodiment of the present invention is described in detail.
Fig. 3 is the preferred structure schematic diagram of 485 communication chip transceiving data automatic switch-over circuit devices of the embodiment of the present invention, as shown in Figure 3, cpu data transmitting terminal (UART_TXD) and cpu data are received and dispatched control end (UART_EN) by R1 (above-mentioned 3rd resistance 38), R3 (above-mentioned second resistance 36), R4 (above-mentioned 5th resistance), R2 (above-mentioned 4th resistance), E1 (above-mentioned electrochemical capacitor 32), the circuit that P1 (above-mentioned triode 30) forms, R5 is above-mentioned first resistance, the last transceiving data switching that only namely can realize 485 communications with UART_TXD.In circuit, when 485 chips are in transmission data mode, are now charged by triode P1, electrochemical capacitor E1, make to receive and dispatch enable control pin and maintain high level.When 485 chips do not send data time, the accumulate of electrochemical capacitor E1 is bled off by R3, receives and dispatches enable pin and becomes low level, carry out the preparation of data receiver at any time.Can be clear and definite in the oscillogram shown in Fig. 4 see, waveform 1 is data transmission DI, and waveform 2 is data receiver enable RE, DE.When waveform 1 has data to send, waveform 2 maintains high level.In time not having data to send, waveform 2 waveform maintains low level.In Figure 5, when RE, DE pin (2,3 pin of chip) is for high level, data are in transmission state, by A, B, data are sent.When RE, DE pin (2,3 pin of chip) is for low level, data are in accepting state, and the data now prepared the other side sends receive.
In sum, the pin that the data in 485 circuit send pin and the enable switching of data transmit-receive connects multiplexing by the technical scheme of the embodiment of the present invention.Appropriate parameter is set, composition charging circuit by triode and electrochemical capacitor.Appropriate parameter is set, composition discharge loop by electrochemical capacitor and resistance.By charging circuit when data send, the 485 enable data that are in send state.During 485 reception data, Enable Pin is in data receiving state.
The data transmit-receive of the technical scheme of the embodiment of the present invention does not need the I/O mouth of 3 MCU to control, and need not be processed by independent software yet.Only need by the data transmitting pin with 485 communication chips, add that the circuit of a discharge and recharge just can realize automatic 485 communication data transmitting-receivings and automatically switch.So both decrease taking of the I/O of MCU, not be used in I/O mouth not enough time increase extended chip again, reduce cost, software control that also simultaneously need not be independent, decreases the workload of software.
Embodiment of the method
According to embodiments of the invention, provide a kind of 485 communication chip transceiving data automatic switching methods, for said apparatus, Fig. 6 is the process flow diagram of 485 communication chip transceiving data automatic switching methods of the embodiment of the present invention, as shown in Figure 6, following process is comprised according to 485 communication chip transceiving data automatic switching methods of the embodiment of the present invention:
Step 601, when described 485 communication chips send data, described triode charges to described electrochemical capacitor, makes described data receiver enable pin and data send enable pin and is in high level, enable described data transmitting pin;
Step 602, when described 485 communication chips do not send data, described electrochemical capacitor, by described second conductive discharge, makes described data receiver enable pin and data send enable pin and is in low level, enable described data receiver pin.
Can be clear and definite in the oscillogram shown in Fig. 4 see, waveform 1 is data transmission DI, and waveform 2 is data receiver enable RE, DE.When waveform 1 has data to send, waveform 2 maintains high level.In time not having data to send, waveform 2 waveform maintains low level.In Figure 5, when RE, DE pin (2,3 pin of chip) is for high level, data are in transmission state, by A, B, data are sent.When RE, DE pin (2,3 pin of chip) is for low level, data are in accepting state, and the data now prepared the other side sends receive.
In sum, do not need the I/O mouth of 3 MCU to control according to the data transmit-receive of the technical scheme of the embodiment of the present invention, need not be processed by independent software yet.Only need by the data transmitting pin with 485 communication chips, add that the circuit of a discharge and recharge just can realize automatic 485 communication data transmitting-receivings and automatically switch.So both decrease taking of the I/O of MCU, not be used in I/O mouth not enough time increase extended chip again, reduce cost, software control that also simultaneously need not be independent, decreases the workload of software.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Intrinsic not relevant to any certain computer, virtual system or miscellaneous equipment with display at this algorithm provided.Various general-purpose system also can with use based on together with this teaching.According to description above, the structure constructed required by this type systematic is apparent.In addition, the present invention is not also for any certain programmed language.It should be understood that and various programming language can be utilized to realize content of the present invention described here, and the description done language-specific is above to disclose preferred forms of the present invention.
In instructions provided herein, describe a large amount of detail.But can understand, embodiments of the invention can be put into practice when not having these details.In some instances, be not shown specifically known method, structure and technology, so that not fuzzy understanding of this description.
Similarly, be to be understood that, in order to simplify the disclosure and to help to understand in each inventive aspect one or more, in the description above to exemplary embodiment of the present invention, each feature of the present invention is grouped together in single embodiment, figure or the description to it sometimes.But, the method for the disclosure should be construed to the following intention of reflection: namely the present invention for required protection requires feature more more than the feature clearly recorded in each claim.Or rather, as claims below reflect, all features of disclosed single embodiment before inventive aspect is to be less than.Therefore, the claims following embodiment are incorporated to this embodiment thus clearly, and wherein each claim itself is as independent embodiment of the present invention.
Those skilled in the art are appreciated that and adaptively can change the module in the client in embodiment and they are arranged in one or more clients different from this embodiment.Block combiner in embodiment can be become a module, and multiple submodule or subelement or sub-component can be put them in addition.Except at least some in such feature and/or process or unit be mutually repel except, any combination can be adopted to combine all processes of all features disclosed in this instructions (comprising adjoint claim, summary and accompanying drawing) and so disclosed any method or client or unit.Unless expressly stated otherwise, each feature disclosed in this instructions (comprising adjoint claim, summary and accompanying drawing) can by providing identical, alternative features that is equivalent or similar object replaces.
In addition, those skilled in the art can understand, although embodiments more described herein to comprise in other embodiment some included feature instead of further feature, the combination of the feature of different embodiment means and to be within scope of the present invention and to form different embodiments.Such as, in the following claims, the one of any of embodiment required for protection can use with arbitrary array mode.
All parts embodiment of the present invention with hardware implementing, or can realize with the software module run on one or more processor, or realizes with their combination.It will be understood by those of skill in the art that the some or all functions of some or all parts be loaded with in the client of sequence network address that microprocessor or digital signal processor (DSP) can be used in practice to realize according to the embodiment of the present invention.The present invention can also be embodied as part or all equipment for performing method as described herein or device program (such as, computer program and computer program).Realizing program of the present invention and can store on a computer-readable medium like this, or the form of one or more signal can be had.Such signal can be downloaded from internet website and obtain, or provides on carrier signal, or provides with any other form.
The present invention will be described instead of limit the invention to it should be noted above-described embodiment, and those skilled in the art can design alternative embodiment when not departing from the scope of claims.In the claims, any reference symbol between bracket should be configured to limitations on claims.Word " comprises " not to be got rid of existence and does not arrange element in the claims or step.Word "a" or "an" before being positioned at element is not got rid of and be there is multiple such element.The present invention can by means of including the hardware of some different elements and realizing by means of the computing machine of suitably programming.In the unit claim listing some devices, several in these devices can be carry out imbody by same hardware branch.Word first, second and third-class use do not represent any order.Can be title by these word explanations.
Claims (6)
1. 485 communication chip transceiving data automatic switch-over circuit devices, is characterized in that, comprising:
The data transmitting pin of 485 communication chips is connected with the data receiver of central processing unit by the first resistance; The data receiver enable pin of described 485 communication chips, data send enable pin and data receiver pin is connected with the data sending terminal of central processing unit by charging circuit;
Described charging circuit comprises: triode, electrochemical capacitor, power supply, second resistance and the 3rd resistance, wherein, described 3rd resistance is used for for described triode current limliting, one end is connected with the B pole of described triode, the other end is connected with the data sending terminal of described central processing unit, the E level of described triode connects described power supply, the C pole of described triode connects the positive pole of described electrochemical capacitor, the minus earth of described electrochemical capacitor, described second resistance is in parallel with described electrochemical capacitor, be connected with the positive and negative polarities of described electrochemical capacitor, described data receiver enable pin and described data send enable pin and are connected, and be connected with the C pole of described triode, described data receiver pin is connected with described data sending terminal.
2. device as claimed in claim 1, it is characterized in that, described charging circuit comprises further: be arranged at the 4th resistance between described data receiver pin and described data sending terminal, described data receiver pin is connected by described 4th resistance with described data sending terminal, and described 4th resistance is used for described charging circuit and external circuit to isolate.
3. device as claimed in claim 2, it is characterized in that, described charging circuit comprises further: be arranged at the 5th resistance between described data receiver enable pin and the C pole of described triode, described data receiver enable pin and described data send after enable pin is connected, be connected with the C pole of described triode by described 5th resistance, described 5th resistance is used for described charging circuit and external circuit to isolate.
4. device as claimed in claim 1, it is characterized in that, the resistance of described first resistance is 1K, and the resistance of described second resistance is 6.8K, and the resistance of described 3rd resistance is 1K.
5. device as claimed in claim 3, it is characterized in that, the resistance of described 4th resistance is 100 Europe, and the resistance of described 5th resistance is 1K.
6. 485 communication chip transceiving data automatic switching methods, for the device according to any one of the claims 1-5, is characterized in that, comprising:
When described 485 communication chips send data, described triode charges to described electrochemical capacitor, makes described data receiver enable pin and data send enable pin and is in high level, enable described data transmitting pin;
When described 485 communication chips do not send data, described electrochemical capacitor, by described second conductive discharge, makes described data receiver enable pin and data send enable pin and is in low level, enable described data receiver pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510725148.6A CN105302759A (en) | 2015-10-29 | 2015-10-29 | Automatic switching circuit device and method of 485 communication chip transmitting and receiving data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510725148.6A CN105302759A (en) | 2015-10-29 | 2015-10-29 | Automatic switching circuit device and method of 485 communication chip transmitting and receiving data |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105302759A true CN105302759A (en) | 2016-02-03 |
Family
ID=55200043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510725148.6A Pending CN105302759A (en) | 2015-10-29 | 2015-10-29 | Automatic switching circuit device and method of 485 communication chip transmitting and receiving data |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105302759A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557859A (en) * | 2018-12-13 | 2019-04-02 | 珠海派诺科技股份有限公司 | Simple general use circuit based on RS-485 communication |
| CN110071858A (en) * | 2019-04-12 | 2019-07-30 | 杭州涂鸦信息技术有限公司 | The anti-collision of 485 interface chips receives and dispatches switching circuit device |
| CN110838227A (en) * | 2019-12-23 | 2020-02-25 | 北京百联长通科技有限公司 | Wireless data receiving device |
| CN110853326A (en) * | 2019-12-23 | 2020-02-28 | 北京百联长通科技有限公司 | Wireless data transmitting device |
| CN111694782A (en) * | 2020-05-23 | 2020-09-22 | 苏州浪潮智能科技有限公司 | Framework and method for realizing automatic switching of trusted platform module |
| CN113189882A (en) * | 2021-07-01 | 2021-07-30 | 深圳合芯谷微电子有限公司 | IO self-adaptive integrated control circuit and control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101026387A (en) * | 2007-02-13 | 2007-08-29 | 徐震 | Automatic stream control device, control method and its circuit |
| CN201434881Y (en) * | 2009-06-10 | 2010-03-31 | 许继集团有限公司 | RS485 interface circuit and electric energy meter employing same |
| CN101719112A (en) * | 2009-11-19 | 2010-06-02 | 北京东方信联科技有限公司 | Half-duplex automatic receiving-transmitting switching circuit of RS485 |
| CN102681962A (en) * | 2012-04-18 | 2012-09-19 | 华为技术有限公司 | Connecting device and anti-jamming system between node devices |
| CN204117139U (en) * | 2014-09-04 | 2015-01-21 | 特变电工西安电气科技有限公司 | The directional control circuit of a kind of RS485 |
-
2015
- 2015-10-29 CN CN201510725148.6A patent/CN105302759A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101026387A (en) * | 2007-02-13 | 2007-08-29 | 徐震 | Automatic stream control device, control method and its circuit |
| CN201434881Y (en) * | 2009-06-10 | 2010-03-31 | 许继集团有限公司 | RS485 interface circuit and electric energy meter employing same |
| CN101719112A (en) * | 2009-11-19 | 2010-06-02 | 北京东方信联科技有限公司 | Half-duplex automatic receiving-transmitting switching circuit of RS485 |
| CN102681962A (en) * | 2012-04-18 | 2012-09-19 | 华为技术有限公司 | Connecting device and anti-jamming system between node devices |
| CN204117139U (en) * | 2014-09-04 | 2015-01-21 | 特变电工西安电气科技有限公司 | The directional control circuit of a kind of RS485 |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557859A (en) * | 2018-12-13 | 2019-04-02 | 珠海派诺科技股份有限公司 | Simple general use circuit based on RS-485 communication |
| CN110071858A (en) * | 2019-04-12 | 2019-07-30 | 杭州涂鸦信息技术有限公司 | The anti-collision of 485 interface chips receives and dispatches switching circuit device |
| CN110071858B (en) * | 2019-04-12 | 2021-05-28 | 杭州涂鸦信息技术有限公司 | Anti-collision transceiving switching circuit device of 485 interface chip |
| CN110838227A (en) * | 2019-12-23 | 2020-02-25 | 北京百联长通科技有限公司 | Wireless data receiving device |
| CN110853326A (en) * | 2019-12-23 | 2020-02-28 | 北京百联长通科技有限公司 | Wireless data transmitting device |
| CN110838227B (en) * | 2019-12-23 | 2024-04-30 | 北京百联长通科技有限公司 | Wireless data receiving device |
| CN110853326B (en) * | 2019-12-23 | 2024-05-03 | 北京百联长通科技有限公司 | Wireless data transmitting device |
| CN111694782A (en) * | 2020-05-23 | 2020-09-22 | 苏州浪潮智能科技有限公司 | Framework and method for realizing automatic switching of trusted platform module |
| CN113189882A (en) * | 2021-07-01 | 2021-07-30 | 深圳合芯谷微电子有限公司 | IO self-adaptive integrated control circuit and control method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105302759A (en) | Automatic switching circuit device and method of 485 communication chip transmitting and receiving data | |
| CN108365967B (en) | Method, system, terminal and computer readable storage medium for dynamically configuring communication parameters | |
| CN105721535A (en) | Parallel processing of service functions in service function chains | |
| CN105677462A (en) | Distributed task system based on internet of things and business processing method | |
| CN109561124A (en) | A kind of method, system and the terminal device of file transmission | |
| CN109379445A (en) | A kind of sending method and device of PUSH message | |
| CN102821045B (en) | Method and device for copying multicast message | |
| CN104050292A (en) | Traffic-saving mode search service method, server, client and system | |
| CN103955436A (en) | Data processing device and terminal | |
| CN106230999A (en) | A kind of contact person information processing method, terminal and server | |
| CN105224489A (en) | A kind of integrated management system of hardware device | |
| CN109995548B (en) | Device management method and system, data transmission method and system and terminal device | |
| CN109934314A (en) | A kind of method for reading data and system of electric power Internet of Things electronic tag | |
| CN105471703A (en) | Message sending method and device | |
| CN205015885U (en) | Switching circuit and electron device | |
| CN102185727B (en) | System and method for writing serial numbers to product firmware in batches | |
| CN113572833A (en) | Cloud mobile phone maintenance method and device, electronic equipment and storage medium | |
| CN112714159A (en) | Message forwarding method and device, storage medium and electronic device | |
| CN105260200A (en) | Processing method and device for upgrading operating system | |
| CN217216573U (en) | Multi-mode group communication system | |
| CN105515786A (en) | Network card, server and pre-boot test method | |
| CN109358983A (en) | Server data processing method, device and storage medium | |
| US20170142227A1 (en) | Data processing apparatus and data processing method | |
| CN105404180A (en) | Node address setting method applied to intelligent cabinet bus control system | |
| CN104951373A (en) | Message queue processing method of scheduling system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160203 |
|
| RJ01 | Rejection of invention patent application after publication |