CN217954945U - Remote point-to-multi serial communication circuit - Google Patents
Remote point-to-multi serial communication circuit Download PDFInfo
- Publication number
- CN217954945U CN217954945U CN202221856625.4U CN202221856625U CN217954945U CN 217954945 U CN217954945 U CN 217954945U CN 202221856625 U CN202221856625 U CN 202221856625U CN 217954945 U CN217954945 U CN 217954945U
- Authority
- CN
- China
- Prior art keywords
- singlechip
- remote point
- circuit
- present
- serial communication
- 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.)
- Active
Links
Images
Landscapes
- Information Transfer Systems (AREA)
Abstract
The utility model provides a remote point-to-multi serial communication circuit, this circuit is applied to on the small-size singlechip, include: a CAN transceiver chip and an optical coupler; and the serial port communication interface TX end and the serial port communication interface RX end of the singlechip are respectively connected with the CAN transceiver chip after being isolated by the optical coupler. The utility model discloses CAN compromise RS485 and CAN bus advantage and disadvantage, reduce the single-point cost, practice thrift the pin and the program space resource of singlechip.
Description
Technical Field
The utility model belongs to the technical field of the singlechip communication, concretely relates to remote point pair is to many serial communication circuit.
Background
At present, the demand of integration level and cost control of a small-sized singlechip communication control system is higher and higher, a serial communication remote point-to-multipoint implementation mode is mostly realized by RS584 or CAN bus, and the 485 bus is generated for getting rid of low communication speed and short communication distance of 232 bus, and has the advantages of low cost, less occupied singlechip pin resource and simple interface program; the disadvantages are low bus utilization rate, low data transmission rate, no fault-tolerant mechanism, high communication failure rate, large influence of node errors and the like. The CAN bus has the advantages of high anti-interference performance and high rate, CAN detect any communication error, and has the advantages of high real-time performance, flexibility, long transmission distance, high reliability and the like of communication capacity; but the cost is high compared with the RS485 bus, a CAN controller module needs to be additionally arranged, the resource load of a single chip microcomputer is increased, and an interface program is relatively complex; therefore, a circuit device which can combine the advantages and the disadvantages of the small-sized singlechip communication control system is needed.
Disclosure of Invention
The above-mentioned not enough to prior art, the utility model provides a remote point pair is to many serial communication circuit to solve above-mentioned technical problem.
The utility model provides a remote point-to-multi serial communication circuit, this circuit is applied to on the small-size singlechip, include: a CAN transceiver chip and an optical coupler; and a serial port communication interface TX end and an RX end of the singlechip are respectively connected with the CAN transceiving chip after being isolated by one optical coupler.
Further, the CAN transceiver chip is a82C250.
Further, the optical coupler is 6n137.
Further, the single chip microcomputer is STM32F103RBT6.
The utility model provides a remote point-to-multipoint serial communication circuit, CAN compromise RS485 and CAN bus advantage and disadvantage, reduce the single-point cost, has saved pin and procedure space resource of the singlechip, the interface procedure is simple; the bus utilization rate is high, the data transmission rate is high, the fault-tolerant mechanism is strong, the communication failure rate is low, and the node error does not influence the whole communication state; the using effect completely achieves the expected aim.
Through the utility model discloses communication distance has obtained effectual increase, and communication failure rate has obtained effectual reduction, and the node error does not influence the whole communication effect of bus to effectual later maintenance cost etc. of having reduced, the economic benefits achievement of bringing is obvious.
Furthermore, the utility model relates to a principle is reliable, and simple structure has very extensive application prospect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a circuit according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a single chip microcomputer according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1, the present embodiment provides a remote point-to-multipoint serial communication circuit, which is applied to a small-sized single chip, and includes: a CAN transceiver chip and an optical coupler; and the serial port communication interface TX end and the serial port communication interface RX end of the singlechip are respectively connected with the CAN transceiver chip after being isolated by the optical coupler. The CAN transceiver chip receives signals sent by the two optical couplers and then is connected with the plurality of transient diodes to avoid instant high-voltage crosstalk and protect the circuit.
The circuit does not need a single chip microcomputer embedded and externally expanded CAN controller, but directly uses a CAN transceiver chip A82C250 to replace MAX485ESA, serial port signals TX and RX of the single chip microcomputer are directly connected with the A82C250 after being isolated by optical coupling, and a control signal does not need to be added like the MAX485 ESA.
In one implementation, the CAN transceiver chip is a82C250.
In one implementation, the optocoupler is 6n137.
In one implementation, as shown in fig. 2, the single chip microcomputer is STM32F103RBT6.
Although the present invention has been described in detail by referring to the drawings in conjunction with the preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and substance of the present invention, and these modifications or substitutions are intended to be within the scope of the present invention/any person skilled in the art can easily conceive of changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. The utility model provides a long distance point-to-many serial communication circuit, this circuit is applied to on the small-size singlechip, its characterized in that includes: a CAN transceiver chip and an optical coupler; and a serial port communication interface TX end and an RX end of the singlechip are respectively connected with the CAN transceiving chip after being isolated by one optical coupler.
2. The remote point-to-multipoint serial communications circuit of claim 1 wherein said CAN transceiver chip is a82C250.
3. The remote point-to-multipoint serial communications circuit of claim 1 wherein said optocoupler is 6n137.
4. The remote point-to-multipoint serial communication circuit according to claim 1, wherein said single chip microcomputer is STM32F103RBT6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221856625.4U CN217954945U (en) | 2022-07-19 | 2022-07-19 | Remote point-to-multi serial communication circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221856625.4U CN217954945U (en) | 2022-07-19 | 2022-07-19 | Remote point-to-multi serial communication circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217954945U true CN217954945U (en) | 2022-12-02 |
Family
ID=84221534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221856625.4U Active CN217954945U (en) | 2022-07-19 | 2022-07-19 | Remote point-to-multi serial communication circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217954945U (en) |
-
2022
- 2022-07-19 CN CN202221856625.4U patent/CN217954945U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111510456B (en) | FC-AE-1553 CAN/RS422 dual-redundancy communication protocol converter | |
| CN107919652B (en) | Three-out-two protection topological structure and method of flexible direct current system converter valve | |
| CN217954945U (en) | Remote point-to-multi serial communication circuit | |
| CN209467012U (en) | A kind of electric car charging group system | |
| CN110708263B (en) | Switch | |
| CN201789043U (en) | Battery management system based on optical fiber CAN network | |
| CN205880862U (en) | Serial communication expansion board | |
| CN202617301U (en) | Optical switch | |
| WO2024016916A1 (en) | Long-distance serial wire debug interface circuit and signal transmission method | |
| CN205070774U (en) | Two optic fibre looped netowrk communication topological structure of high -voltage inverter power unit | |
| CN201336663Y (en) | Laser energy supply system with standby laser | |
| CN207304589U (en) | Aerospace vehicle communication system based on plastic optical fiber CAN bus | |
| CN216794999U (en) | Unidirectional data transmission equipment and data transmission platform | |
| CN115242307A (en) | Unmanned aerial vehicle machine carries CAN optical fiber conversion equipment | |
| CN201289533Y (en) | Optical path coupled structure and optical module with the same | |
| CN203882431U (en) | Data acquisition device supporting wire/wireless hybrid network | |
| CN209949109U (en) | Electric power optical fiber multiplication system based on wavelength conversion technology | |
| CN101662405B (en) | Communication circuit of CAN bus | |
| CN204145526U (en) | With the CAN repeater of dual master control module | |
| CN111161474A (en) | Tax-control oiling machine data acquisition system | |
| CN107634972B (en) | Unidirectional communication system and board card of nuclear power station safety level system and non-safety level system | |
| CN214755602U (en) | High-voltage-resistant battery management system based on optical fiber communication | |
| CN220962207U (en) | Data monitoring system with automatic receiving and transmitting function | |
| CN219834163U (en) | Multi-core terminal architecture for power system | |
| CN218868252U (en) | RJ11 type CAN/RS485 dual-mode communication channel data acquisition terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |