CN116054867A - CAN transceiver circuit, communication device and vehicle - Google Patents
CAN transceiver circuit, communication device and vehicle Download PDFInfo
- Publication number
- CN116054867A CN116054867A CN202310093871.1A CN202310093871A CN116054867A CN 116054867 A CN116054867 A CN 116054867A CN 202310093871 A CN202310093871 A CN 202310093871A CN 116054867 A CN116054867 A CN 116054867A
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- 239000003990 capacitor Substances 0.000 claims description 11
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40215—Controller Area Network CAN
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40267—Bus for use in transportation systems
- H04L2012/40273—Bus for use in transportation systems the transportation system being a vehicle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transceivers (AREA)
Abstract
The application relates to a CAN transceiver circuit, communication device and vehicle, CAN transceiver circuit includes: a first transceiver, a second transceiver, a controller, a level selection circuit, a transceiver driving circuit; the controller is connected with the transceiver driving circuit through the level selection circuit, and the level selection circuit is used for generating a first selection signal to be transmitted to the transceiver driving circuit under the driving of a first control signal output by the controller so as to control the transceiver driving circuit to drive the first transceiver to work, and generating a second selection signal to be transmitted to the transceiver driving circuit under the driving of a second control signal output by the controller so as to control the transceiver driving circuit to drive the second transceiver to work. The CAN transceiver circuit uses the same controller to control the level output of the pin, and the level conversion is carried out through the triode to realize the normal operation of the first transceiver and the second transceiver which are mutually replaced.
Description
Technical Field
The application relates to the technical field of communication, in particular to a CAN transceiver circuit, a communication device and a vehicle.
Background
In the prior art, if two transceivers are required to work normally, two different kinds of software are required to be provided to control the two different kinds of transceivers respectively, but the production inconvenience is caused by the fact that the two kinds of transceivers are not only increased in production time, but also high in production cost.
In view of the above problems, those skilled in the art have sought solutions.
Disclosure of Invention
The technical problem to be solved by the application is to provide a CAN transceiver circuit, a communication device and a vehicle aiming at the defects of the prior art.
In order to achieve the above object, the present application is implemented by the following technical scheme:
a CAN transceiver circuit comprising: a first transceiver, a second transceiver, a controller, a level selection circuit, a transceiver driving circuit; the controller is connected with the transceiver driving circuit through the level selection circuit, and the level selection circuit is used for generating a first selection signal to be transmitted to the transceiver driving circuit under the driving of a first control signal output by the controller so as to control the transceiver driving circuit to drive the first transceiver to work, and generating a second selection signal to be transmitted to the transceiver driving circuit under the driving of a second control signal output by the controller so as to control the transceiver driving circuit to drive the second transceiver to work.
Optionally, the level selection circuit includes power, triode, first resistance and third resistance, the triode the base with the drive end electric connection of controller, the triode the collecting electrode pass through the third resistance with the power is connected, the projecting pole and the ground connection of triode, first resistance set up in between base and the collecting electrode of triode.
Optionally, the transceiver driving circuit includes a transceiver strobe chip; and the collector electrode of the triode is electrically connected with a transceiver gating pin of the transceiver gating chip, which is used for selectively driving the first transceiver or the second transceiver.
Optionally, the transmitting pin and the receiving pin of the transceiver gating chip are respectively connected with a receiving end and a transmitting end corresponding to the controller; the transceiver strobe chip's transmit pin and receive pin are used for transmitting operational information with the controller when either the first transceiver or the second transceiver is operational.
Optionally, the high-level pin and the low-level pin of the transceiver gating chip are respectively connected with a high-level end and a low-level end corresponding to the external electronic equipment; the high-level pin and the low-level pin of the transceiver gating chip are used for communicating with the external electronic equipment when the first transceiver or the second transceiver works.
Optionally, the CAN transceiver circuit further includes a first power supply, a second power supply, a third power supply, a fourth resistor, and a fifth resistor; the first power supply is connected with an enabling pin of the transceiver gating chip, and is grounded through the fourth resistor; the second power supply is connected with an error fault pin of the transceiver gating chip through the fifth resistor; the third power supply is connected with the data power supply pin and the power supply pin of the transceiver gating chip.
Optionally, the CAN transceiver circuit further comprises a backup power supply; the standby power supply is connected with a standby power supply pin of the transceiver gating chip; the backup power supply is used for supplying power to the first transceiver or the second transceiver.
Optionally, the CAN transceiver circuit further comprises a first capacitor and a second capacitor; the first capacitor is arranged between the standby power supply pin and the grounding pin of the transceiver gating chip, and the second capacitor is arranged between the third power supply and the grounding end.
The application also provides a CAN bus communication device comprising the CAN transceiver circuit.
The application also provides a vehicle comprising the CAN bus communication device.
The utility model provides a CAN transceiver circuit, communication device and vehicle, through utilizing the level output of same controller control pin, carry out level conversion through the triode and CAN realize that control each other is first transceiver, the second transceiver normal operating of replacement, simple and convenient reliable.
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings.
Drawings
The present application is described in detail below with reference to the attached drawing figures and detailed description;
fig. 1 is a schematic structural diagram of a CAN transceiver circuit according to an embodiment of the present application.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
Fig. 1 is a schematic structural diagram of a CAN transceiver circuit according to an embodiment of the present application, where the present application provides a CAN transceiver circuit, including: a first transceiver a, a second transceiver B (not shown), a controller 10, a level selection circuit 20, and a transceiver driving circuit 30.
The controller 10 is connected to the transceiver driving circuit 30 through the level selection circuit 20.
The level selection circuit 20 is configured to generate a first selection signal to be transmitted to the transceiver driving circuit 30 under the driving of the first control signal output by the controller 10 to control the transceiver driving circuit 30 to drive the first transceiver a to operate, and generate a second selection signal to be transmitted to the transceiver driving circuit 30 under the driving of the second control signal output by the controller 10 to control the transceiver driving circuit 30 to drive the second transceiver B to operate.
In this embodiment, the controller 10 is MCU (Microcontroller Unit).
Alternatively, the level selection circuit 20 includes a main power supply VCC, a transistor Q1, a first resistor R1, and a third resistor R3. The base of triode Q1 and the drive end electric connection of controller 10, triode Q1's collecting electrode passes through third resistance R3 to be connected with main power VCC, and triode Q1's projecting pole is connected with the ground terminal, and first resistance R1 sets up between triode Q1's base and collecting electrode.
Optionally, the controller 10 is further connected to the ground through a second resistor.
Optionally, the transceiver driving circuit 30 includes a transceiver strobe chip U1. The collector of the triode Q1 is electrically connected with a transceiver gating pin of the transceiver gating chip U1 for selectively driving the first transceiver A or the second transceiver B. Specifically, the collector of the transistor Q1 is electrically connected to the fourteenth pin STB of the transceiver strobe chip U1.
In this embodiment, the first control signal is a low level signal, and the second control signal is a high level signal. Specifically, when the signal output pin of the controller 10 outputs a low-level signal, the triode Q1 is turned off, and the level of the fourteenth pin STB of the transceiver gating chip U1 is pulled up to the main power VCC, i.e., when the fourteenth pin STB is at a high level, the transceiver gating chip U1 drives the first transceiver a to work normally;
when the signal output pin of the controller 10 outputs a high level signal, the triode Q1 is turned on, and the level of the fourteenth pin STB of the transceiver strobe chip U1 is pulled down to the ground, i.e., the fourteenth pin STB is at a low level at this time, and the transceiver strobe chip U1 drives the second transceiver B to work normally.
Optionally, the transmitting pin TXD and the receiving pin RXD of the transceiver strobe chip U1 are respectively connected with a receiving end and a transmitting end corresponding to the controller 10; the transmit pin TXD and the receive pin of the transceiver strobe chip U1 are used to transmit operation information with the controller 10 when the first transceiver a or the second transceiver B is operated. Specifically, the first pin TXD of the transceiver strobe chip U1 is connected to a transmitting pin corresponding to the controller 10, and the second pin RXD of the transceiver strobe chip U1 is connected to a receiving pin corresponding to the controller 10.
Optionally, the high-level pin CANH and the low-level pin CANL of the transceiver strobe chip U1 are respectively connected with a high-level end and a low-level end corresponding to the external electronic device; the high level pin CANH and the low level pin CANL of the transceiver strobe chip U1 are used to communicate with an external electronic device when the first transceiver a or the second transceiver B is operating. Specifically, the thirteenth pin CANH of the transceiver gating chip U1 is connected to a high-level pin corresponding to the external electronic device, and the twelfth pin CANL of the transceiver gating chip U1 is connected to a low-level pin corresponding to the external electronic device.
Optionally, the CAN transceiver circuit further includes a first power supply VCC, a second power supply VCC, a third power supply VCC, a fourth resistor R4, and a fifth resistor R5. The first power supply VCC is connected with an enabling pin of the transceiver gating chip U1 and is grounded through a fourth resistor R4; the second power supply VCC is connected with an error fault pin of the transceiver gating chip U1 through a fifth resistor R5; the third power supply VCC is connected to the data power supply pin and the power supply pin of the transceiver strobe chip U1. Specifically, the first power supply VCC is connected to the sixth pin EN of the transceiver strobe chip U1, the second power supply VCC is connected to the eighth pin ERR of the transceiver strobe chip U1 through the fifth resistor R5, and the third power supply VCC is connected to the third pin VCC and the fifth pin VIO of the transceiver strobe chip U1, respectively. The ninth pin of the transceiver strobe chip U1 is connected with the ground terminal.
Optionally, the CAN transceiver circuit further comprises a standby power supply VBAT. The standby power supply VBAT is connected with a standby power supply pin of the transceiver gating chip U1; the standby power supply VBAT is used to supply power to the first transceiver a or the second transceiver B. Specifically, the standby power supply VBAT is connected to the tenth pin VBAT of the transceiver strobe chip U1.
In this embodiment, the main power source VCC, the first power supply source VCC, the second power supply source VCC, and the third power supply source VCC are all 5V power supplies, and the standby power source VBAT is 12V power supplies.
Optionally, the CAN transceiver circuit further includes a first capacitor C1 and a second capacitor C2; the first capacitor C1 is disposed between the standby power pin and the ground pin of the transceiver strobe chip U1, and the second capacitor C2 is disposed between the third power supply VCC and the ground terminal. Specifically, the first capacitor C1 is disposed between the tenth pin VBAT and the second pin GND of the transceiver strobe chip U1.
The working principle of the CAN transceiver circuit is as follows: when the signal output pin of the controller 10 outputs a low-level signal, the triode Q1 is turned off, the level of the fourteenth pin STB of the transceiver gating chip U1 is pulled up to the main power supply VCC, the fourteenth pin STB obtains a working voltage of 5V, and then the transceiver gating chip U1 drives the first transceiver A to work normally and the second transceiver B does not work;
when the signal output pin of the controller 10 outputs a high-level signal, the triode Q1 is turned on, the level of the fourteenth pin STB of the transceiver gating chip U1 is pulled down to the ground, the fourteenth pin STB does not obtain the 5V operating voltage, and the transceiver gating chip U1 drives the second transceiver B to operate normally, so that the first transceiver a does not operate.
The application also provides a CAN bus communication device comprising the CAN transceiver circuit.
The application also provides a vehicle comprising the CAN bus communication device.
The CAN transceiver circuit, the communication device and the vehicle CAN realize the normal operation of the first transceiver and the second transceiver which are mutually replaced by control through level output of the control pins of the same controller and level conversion of the triode, and are simple, convenient, reliable and low in cost.
It will be apparent to those skilled in the art that various modifications and variations can be made to the invention without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations. The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the element defined by the phrase "comprising one … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element, and furthermore, elements having the same name in different embodiments of the present application may have the same meaning or may have different meanings, a particular meaning of which is to be determined by its interpretation in this particular embodiment or by further combining the context of this particular embodiment.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, a first element could also be termed a second element, and, similarly, a second element could also be termed a first element, without departing from the scope herein. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, depending on the context, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including" specify the presence of stated features, steps, operations, elements, components, items, categories, and/or groups, but do not preclude the presence, presence or addition of one or more other features, steps, operations, elements, components, items, categories, and/or groups. The terms "or" and/or "as used herein are to be construed as inclusive, or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; A. b and C). An exception to this definition will occur only when a combination of elements, functions, steps or operations are in some way inherently mutually exclusive.
The foregoing description of the preferred embodiment of the present invention is provided for the purpose of illustration only, and is not intended to limit the invention to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (10)
1. A CAN transceiver circuit comprising: a first transceiver, a second transceiver, a controller, a level selection circuit, a transceiver driving circuit;
the controller is connected with the transceiver driving circuit through the level selection circuit, and the level selection circuit is used for generating a first selection signal to be transmitted to the transceiver driving circuit under the driving of a first control signal output by the controller so as to control the transceiver driving circuit to drive the first transceiver to work, and generating a second selection signal to be transmitted to the transceiver driving circuit under the driving of a second control signal output by the controller so as to control the transceiver driving circuit to drive the second transceiver to work.
2. The CAN transceiver circuit of claim 1, wherein the level selection circuit comprises a power supply, a triode, a first resistor and a third resistor, a base of the triode is electrically connected with the driving end of the controller, a collector of the triode is connected with the power supply through the third resistor, an emitter of the triode is connected with a ground terminal, and the first resistor is disposed between the base and the collector of the triode.
3. The CAN transceiver circuit of claim 2, wherein the transceiver driver circuit comprises a transceiver strobe chip;
and the collector electrode of the triode is electrically connected with a transceiver gating pin of the transceiver gating chip, which is used for selectively driving the first transceiver or the second transceiver.
4. The CAN transceiver circuit of claim 3, wherein the transmit pin and the receive pin of the transceiver strobe chip are respectively connected with a receive end and a transmit end corresponding to the controller; the transceiver strobe chip's transmit pin and receive pin are used for transmitting operational information with the controller when either the first transceiver or the second transceiver is operational.
5. The CAN transceiver circuit of claim 3, wherein the high level pin and the low level pin of the transceiver strobe chip are connected with a high level terminal and a low level terminal, respectively, corresponding to an external electronic device; the high-level pin and the low-level pin of the transceiver gating chip are used for communicating with the external electronic equipment when the first transceiver or the second transceiver works.
6. The CAN transceiver circuit of claim 3, further comprising a first power supply, a second power supply, a third power supply, a fourth resistor, a fifth resistor;
the first power supply is connected with an enabling pin of the transceiver gating chip, and is grounded through the fourth resistor;
the second power supply is connected with an error fault pin of the transceiver gating chip through the fifth resistor;
the third power supply is connected with the data power supply pin and the power supply pin of the transceiver gating chip.
7. The CAN transceiver circuit of claim 3, wherein the CAN transceiver circuit further comprises a backup power supply; the standby power supply is connected with a standby power supply pin of the transceiver gating chip; the backup power supply is used for supplying power to the first transceiver or the second transceiver.
8. The CAN transceiver circuit of claims 6 and 7, further comprising a first capacitance and a second capacitance;
the first capacitor is arranged between the standby power supply pin and the grounding pin of the transceiver gating chip, and the second capacitor is arranged between the third power supply and the grounding end.
9. CAN bus communication device, characterized by comprising a CAN transceiver circuit according to any of claims 1-8.
10. A vehicle comprising the CAN bus communication device of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310093871.1A CN116054867A (en) | 2023-02-02 | 2023-02-02 | CAN transceiver circuit, communication device and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310093871.1A CN116054867A (en) | 2023-02-02 | 2023-02-02 | CAN transceiver circuit, communication device and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116054867A true CN116054867A (en) | 2023-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310093871.1A Pending CN116054867A (en) | 2023-02-02 | 2023-02-02 | CAN transceiver circuit, communication device and vehicle |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107295707A (en) * | 2016-04-11 | 2017-10-24 | 佛山市顺德区美的电热电器制造有限公司 | Drive circuit, electromagnetic heater and driving method |
| CN107508613A (en) * | 2017-07-04 | 2017-12-22 | 广州致远电子有限公司 | Transmission circuit |
| CN214851274U (en) * | 2021-02-24 | 2021-11-23 | 上海闻泰信息技术有限公司 | CAN bus communication circuit and CAN bus communication device |
| CN216720891U (en) * | 2021-12-28 | 2022-06-10 | 比亚迪股份有限公司 | High-side driving circuit and controller with same |
| WO2022161356A1 (en) * | 2021-01-29 | 2022-08-04 | 北京紫光展锐通信技术有限公司 | Power-on control circuit and related device thereof |
| US20220301491A1 (en) * | 2021-03-18 | 2022-09-22 | Hefei Boe Display Technology Co., Ltd. | Timing controller board, main control board, display device, and detection method thereof |
-
2023
- 2023-02-02 CN CN202310093871.1A patent/CN116054867A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107295707A (en) * | 2016-04-11 | 2017-10-24 | 佛山市顺德区美的电热电器制造有限公司 | Drive circuit, electromagnetic heater and driving method |
| CN107508613A (en) * | 2017-07-04 | 2017-12-22 | 广州致远电子有限公司 | Transmission circuit |
| WO2022161356A1 (en) * | 2021-01-29 | 2022-08-04 | 北京紫光展锐通信技术有限公司 | Power-on control circuit and related device thereof |
| CN214851274U (en) * | 2021-02-24 | 2021-11-23 | 上海闻泰信息技术有限公司 | CAN bus communication circuit and CAN bus communication device |
| US20220301491A1 (en) * | 2021-03-18 | 2022-09-22 | Hefei Boe Display Technology Co., Ltd. | Timing controller board, main control board, display device, and detection method thereof |
| CN216720891U (en) * | 2021-12-28 | 2022-06-10 | 比亚迪股份有限公司 | High-side driving circuit and controller with same |
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