CN110569207A - Interface multiplexing device and vehicle-mounted equipment - Google Patents
Interface multiplexing device and vehicle-mounted equipment Download PDFInfo
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- CN110569207A CN110569207A CN201910286681.5A CN201910286681A CN110569207A CN 110569207 A CN110569207 A CN 110569207A CN 201910286681 A CN201910286681 A CN 201910286681A CN 110569207 A CN110569207 A CN 110569207A
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- G—PHYSICS
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- 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
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Abstract
The application discloses interface multiplexing device and vehicle-mounted equipment. The interface multiplexing device comprises a data line and a host, wherein the data line comprises: presetting a data interface and an ID pin, wherein the ID pin is pre-configured with different voltage values according to the type of the preset data interface; the host includes: the device comprises a data receiving unit, a path switching unit and an ID detection unit, wherein the ID detection unit is used for detecting a voltage value on the ID pin and configuring the position of an electronic switch in the path switching unit according to a preset voltage value so as to switch the preset data interface to a corresponding interface position in the data receiving unit. The application solves the technical problem of low interface utilization rate. By the method and the device, external data transmission can be better compatible, and the utilization rate of the interface is improved. In addition, the interface multiplexing device of this application can be used to the mobile unit, reduces the idle of interface and reduces the car space of mobile unit and occupy.
Description
Technical Field
the application relates to the field of data interfaces, in particular to an interface multiplexing device and vehicle-mounted equipment.
Background
And the vehicle-mounted equipment is provided with different data interface types.
The inventors have found that a large amount of space is required to accommodate connectors of different data interface types. Furthermore, the data interface in the connector is in a use state of selecting one more, and the utilization rate of the interface is low.
Aiming at the problem of low interface utilization rate in the related technology, an effective solution is not provided at present.
Disclosure of Invention
the main objective of the present application is to provide an interface multiplexing apparatus and a vehicle-mounted device, so as to solve the problem of low interface utilization rate.
To achieve the above object, according to one aspect of the present application, there is provided an interface multiplexing apparatus.
The interface multiplexing device according to the present application includes: for an in-vehicle data interface, the apparatus comprising: data line and host computer, the data line includes: presetting a data interface and an ID pin, wherein the ID pin is pre-configured with different voltage values according to the type of the preset data interface; the host includes: the device comprises a data receiving unit, a path switching unit and an ID detection unit, wherein the ID detection unit is used for detecting a voltage value on the ID pin and configuring the position of an electronic switch in the path switching unit according to a preset voltage value so as to switch the preset data interface to a corresponding interface position in the data receiving unit.
Further, the ID detection unit detects a voltage value on the ID pin using a comparator.
Further, a second bus communication chip is configured on the ID detection unit and is used for detecting the voltage value on the ID pin configured on the first bus communication chip in advance on the ID pin.
Further, the ID pins are pre-configured with different voltage values through a 1-wire bus.
further, the channel switching unit is used for switching data interfaces among the USB, the UART and the CAN and LIN buses.
Further, the path switching unit includes: the logic switching unit is used for configuring the position of the analog switch according to a preset voltage value so as to switch the preset data interface to a corresponding interface position in the data receiving unit.
Further, the pre-configuring, by the ID pin, different voltage values according to the type of the preset data interface includes: according to the data interface type corresponding to the preset voltage interval where the voltage on the ID pin is located, establishing a mapping relation between the voltage on the ID pin and the preset data interface type: the voltage of the first ID pin corresponds to a data interface USB, and the voltage of the first ID pin is a voltage value of the USB; the voltage of the second ID pin corresponds to a data interface UART, and the voltage of the second ID pin is the voltage value of the UART; the voltage of the third ID pin corresponds to a data interface CAN, and the voltage of the third ID pin is a voltage value of the CAN; the fourth ID pin voltage corresponds to the data interface LIN, and the fourth ID pin voltage is the voltage value of LIN.
Furthermore, the data receiving unit is connected with the path switching unit and used for determining the position of a data interface, and the ID detecting unit is connected with the path switching unit and used for configuring the position of an electronic switch in the path switching unit after the data line is inserted into the host and matching with the data interface.
Based on the foregoing, the present application further provides an on-vehicle device, including: the interface multiplexing device.
In the interface multiplexing device in the embodiment of the application, by means of a data line and a host, through presetting a data interface and an ID pin, the ID pin is pre-configured with different voltage values according to the type of the preset data interface, so that the purpose that the ID detection unit is used for detecting the voltage value on the ID pin and configuring the position of the electronic switch in the path switching unit according to the pre-set voltage value is achieved, the technical effect that the preset data interface is switched to the corresponding interface position in the data receiving unit is achieved, and the technical problem that the interface utilization rate is low is further solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, serve to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
Fig. 1 is a schematic structural diagram of an interface multiplexing apparatus according to an embodiment of the present application;
FIG. 2 is a diagram illustrating the correspondence between the interface type and the voltage value in the interface multiplexing apparatus according to an embodiment of the present application;
FIG. 3 is a schematic structural diagram (ID interface voltage comparison) of an interface multiplexing apparatus according to another embodiment of the present application;
FIG. 4 is a schematic structural diagram of an interface multiplexing apparatus according to still another embodiment of the present application (manner of communication chip for ID interface detection);
FIG. 5 is a schematic structural diagram of an interface multiplexing apparatus according to another embodiment of the present application (ID interface detecting the mode of a communication chip and 1-wire bus).
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "sleeved" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, an interface multiplexing apparatus according to an embodiment of the present application is used for a vehicle data interface, and the apparatus includes: data line 11 and host computer 1, data line 11 includes: presetting a data interface 111 and an ID pin 112, wherein the ID pin 112 is configured with different voltage values in advance according to the type of the preset data interface 111; the host 1 includes: the data interface switching device comprises a data receiving unit 14, a path switching unit 13 and an ID detecting unit 12, wherein the ID detecting unit 12 is configured to detect a voltage value on the ID pin 112, and configure a position of an electronic switch in the path switching unit 13 according to a preset voltage value, so that the preset data interface is switched to a corresponding interface position in the data receiving unit 14. The preset data interface 111 has multiple types, the ID pin 112 needs to be configured with different voltage values in advance according to the type of the preset data interface 111, and the voltage values and the preset data interface types have a corresponding relationship, that is, different voltage values correspond to different preset interface types. The data receiving unit 14 is used for receiving data transmitted by the data interface, and the path switching unit 13 has a switchable electronic switch and can switch the position of the electronic switch according to corresponding logic. The ID detection unit 12 is connected to the ID pin, and configured to detect a voltage value on the ID pin, and obtain a type of interface data corresponding to the voltage value through corresponding logical operation, where the type of interface data corresponds to a corresponding reception type in the data reception unit 14.
specifically, as shown in fig. 1 and 2, the interface multiplexing apparatus in the embodiment of the present application is composed of a data line 11 and a host 1. The host 1 includes: an ID detection unit 12, a path switching unit 13, and a data receiving unit 14, wherein the data line 11 includes: the data interface circuit comprises a preset data interface 111 and an ID pin 112, wherein the ID pin 112 has different preset voltage values according to different forms of the preset data interface 111. After the data line 11 is inserted into the host 1, the ID detection unit 12 detects the voltage on the ID pin 112, and configures the position of the electronic switch in the path switching unit 13 according to the voltage value in the pre-configured voltage-data interface type table, so that the preset data interface 111 can be switched to the corresponding interface position in the data receiving unit 14, thereby achieving the function of switching different data interfaces.
it should be noted that the voltage-data interface type table only represents the correspondence between the voltage value on the ID pin and the preset data interface type, wherein the voltage value does not represent the limitation on the voltage and data interface type.
From the above description, it can be seen that the following technical effects are achieved by the present application:
By means of a data line and a host, different voltage values are pre-configured on the ID pin according to the type of the preset data interface by means of the preset data interface and the ID pin, and the purpose that the ID detection unit is used for detecting the voltage value on the ID pin and configuring the position of the electronic switch in the access switching unit according to the pre-set voltage value is achieved, so that the technical effect that the preset data interface is switched to the corresponding interface position in the data receiving unit is achieved, and the technical problem of low interface utilization rate is solved.
Preferably, the interface multiplexing apparatus in the embodiment of the present application is used for a vehicle data interface, and the apparatus includes: data line and host computer, the data line includes: presetting a data interface and an ID pin, wherein the ID pin is pre-configured with different voltage values according to the type of the preset data interface; the host includes: the device comprises a data receiving unit, a path switching unit and an ID detection unit, wherein the ID detection unit is used for detecting a voltage value on the ID pin and configuring the position of an electronic switch in the path switching unit according to a preset voltage value so as to switch the preset data interface to a corresponding interface position in the data receiving unit. The ID detection unit is provided with a second bus communication chip for detecting the voltage value on the ID pin which is configured on the ID pin through the first bus communication chip in advance. The ID pins are pre-configured with different voltage values through a 1-wire bus.
Preferably, the interface multiplexing apparatus in the embodiment of the present application is used for a vehicle data interface, and the apparatus includes: data line and host computer, the data line includes: presetting a data interface and an ID pin, wherein the ID pin is pre-configured with different voltage values according to the type of the preset data interface; the host includes: the device comprises a data receiving unit, a path switching unit and an ID detection unit, wherein the ID detection unit is used for detecting a voltage value on the ID pin and configuring the position of an electronic switch in the path switching unit according to a preset voltage value so as to switch the preset data interface to a corresponding interface position in the data receiving unit. The path switching unit includes: the logic switching unit is used for configuring the position of the analog switch according to a preset voltage value so as to switch the preset data interface to a corresponding interface position in the data receiving unit. The ID detection unit is provided with a second bus communication chip for detecting the voltage value on the ID pin which is configured on the ID pin through the first bus communication chip in advance.
According to the embodiment of the present application, as a preferred feature of the embodiment, as shown in fig. 3, the ID detection unit 12 uses a comparator to detect the voltage value on the ID pin. The voltage comparison method of the ID detection unit 12 may include various methods, as long as the voltage value of the ID pin can be detected, and is not limited in the embodiment of the present application.
According to the embodiment of the present application, as a preference in the embodiment, as shown in fig. 4, the ID detection unit 12 is configured with a second bus communication chip 30 for detecting a voltage value on the ID pin 112, which is configured by the first bus communication chip 20 in advance. The function of presetting a data interface type and a voltage relation table can be completed through the first bus communication core 20 and the second bus communication chip 30, and the position of the electronic switch in the path switching unit 13 is configured, so that the preset data interface 111 can be switched to the corresponding interface position in the data receiving unit 14, thereby achieving the function of switching different data interfaces.
Preferably, as shown in FIG. 5, the ID pins 112 are preconfigured with different voltage values via a 1-wire bus. Specifically, the ID pin 112 may complete a function of a data interface type table through a bus with a communication function, such as a 1-wire bus, and configure a position of an electronic switch in the path switching unit 13, so that the preset data interface 111 can be switched to a corresponding interface position in the data receiving unit 14, thereby achieving a function of switching different data interfaces.
Preferably, the channel switching unit is used for switching data interfaces between the USB, UART and CAN, LIN buses. The vehicle-mounted data multiplexing interface is used for being better compatible with external data input, and can be used for OBD equipment and the like based on different interface forms. The voltage value is configured in the position of the electronic switch in the path switching unit 13, and the preset data interface 111 is switched to different interface forms including USB, UART, CAN, LIN bus, etc.
According to the embodiment of the present application, as a preferable feature in the embodiment, the path switching unit 13 includes: the data receiving unit comprises a logic switching unit (not shown) and an analog switch (not shown), wherein the logic switching unit is used for configuring the position of the analog switch according to a preset voltage value so as to switch the preset data interface to a corresponding interface position in the data receiving unit.
According to the embodiment of the present application, as a preferred option in the embodiment, the pre-configuring, by the ID pin, different voltage values according to the type of the preset data interface includes: according to the data interface type corresponding to the preset voltage interval where the voltage on the ID pin is located, establishing a mapping relation between the voltage on the ID pin and the preset data interface type: the voltage of the first ID pin corresponds to a data interface USB, and the voltage of the first ID pin is a voltage value of the USB; the voltage of the second ID pin corresponds to a data interface UART, and the voltage of the second ID pin is the voltage value of the UART; the voltage of the third ID pin corresponds to a data interface CAN, and the voltage of the third ID pin is a voltage value of the CAN; the fourth ID pin voltage corresponds to the data interface LIN, and the fourth ID pin voltage is the voltage value of LIN.
according to the embodiment of the present application, as shown in fig. 1, preferably, the data receiving unit 14 is connected to the path switching unit 13 for determining a data interface position, and the ID detecting unit 12 is connected to the path switching unit 13 for configuring a position of an electronic switch in the path switching unit after the data line is inserted into the host and matching with the data interface. The data receiving unit 14 is used for receiving data transmitted by the data interface, and the path switching unit 13 has a switchable electronic switch and can switch the position of the electronic switch according to corresponding logic. The ID detection unit 12 is connected to the ID pin, and configured to detect a voltage value on the ID pin, and obtain a type of interface data corresponding to the voltage value through corresponding logical operation, where the type of interface data corresponds to a corresponding reception type in the data reception unit 14.
it should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
According to an embodiment of the present application, there is also provided an onboard apparatus for implementing the interface multiplexing apparatus, the onboard apparatus including: the interface multiplexing device.
The vehicle-mounted equipment comprises the interface multiplexing device, and can be better compatible with external data input. Preferably, OBD devices may be based on different interface forms such as USB, UART and CAN, LIN bus etc. The interface multiplexing device for the vehicle-mounted data interface is included in the vehicle-mounted equipment, and the device comprises: data line 11 and host computer 1, data line 11 includes: presetting a data interface 111 and an ID pin 112, wherein the ID pin 112 is configured with different voltage values in advance according to the type of the preset data interface 111; the host 1 includes: the data interface switching device comprises a data receiving unit 14, a path switching unit 13 and an ID detecting unit 12, wherein the ID detecting unit 12 is configured to detect a voltage value on the ID pin 112, and configure a position of an electronic switch in the path switching unit 13 according to a preset voltage value, so that the preset data interface is switched to a corresponding interface position in the data receiving unit 14. After the data line 11 is plugged into the host, the ID detection unit 12 detects the voltage on the ID pin 112, and configures the position of the electronic switch in the path switching unit 13 according to the voltage value in the pre-defined voltage-data interface type table, so that the preset data interface 111 can be switched to the corresponding interface position in the data receiving unit 14, thereby achieving the function of switching different data interfaces.
Preferably, the interface multiplexing function is realized by detecting with one ID pin 112 and switching with the path switching unit 13. The implementation principle and the beneficial effect of the middle interface multiplexing device of the vehicle-mounted device are as described above, and are not described herein again.
It will be apparent to those skilled in the art that the modules or steps of the present application described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and they may alternatively be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, or fabricated separately as individual integrated circuit modules, or fabricated as a single integrated circuit module from multiple modules or steps. Thus, the present application is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (9)
1. An interface multiplexing device for use in an in-vehicle data interface, the device comprising: a data line and a host computer,
the data line includes: presetting a data interface and an ID pin, wherein the ID pin is pre-configured with different voltage values according to the type of the preset data interface;
The host includes: the device comprises a data receiving unit, a path switching unit and an ID detection unit, wherein the ID detection unit is used for detecting a voltage value on the ID pin and configuring the position of an electronic switch in the path switching unit according to a preset voltage value so as to switch the preset data interface to a corresponding interface position in the data receiving unit.
2. The interface multiplexing device of claim 1, wherein the ID detection unit detects the voltage value on the ID pin using a comparator.
3. The interface multiplexing apparatus according to claim 1, wherein a second bus communication chip is provided in the ID detection unit, and configured to detect a voltage value on the ID pin previously provided by the first bus communication chip.
4. the interface multiplexing device of claim 3 wherein the ID pins are preconfigured with different voltage values via a 1-wire bus.
5. The interface multiplexing device as claimed in claim 1, wherein the path switching unit is configured to switch the data interface between USB, UART and CAN, LIN buses.
6. The interface multiplexing device according to claim 1, wherein the path switching unit comprises: the logic switching unit is used for configuring the position of the analog switch according to a preset voltage value so as to switch the preset data interface to a corresponding interface position in the data receiving unit.
7. The interface multiplexing device of claim 1, wherein the pre-configuring the ID pin with different voltage values according to the type of the predetermined data interface comprises:
According to the data interface type corresponding to the preset voltage interval where the voltage on the ID pin is located, establishing a mapping relation between the voltage on the ID pin and the preset data interface type:
the voltage of the first ID pin corresponds to a data interface USB, and the voltage of the first ID pin is a voltage value of the USB;
the voltage of the second ID pin corresponds to a data interface UART, and the voltage of the second ID pin is the voltage value of the UART;
the voltage of the third ID pin corresponds to a data interface CAN, and the voltage of the third ID pin is a voltage value of the CAN;
The fourth ID pin voltage corresponds to the data interface LIN, and the fourth ID pin voltage is the voltage value of LIN.
8. The interface multiplexing device according to claim 1, wherein the data receiving unit is connected to the path switching unit for determining a data interface position, and the ID detecting unit is connected to the path switching unit for configuring a position of an electronic switch in the path switching unit and matching the data interface after the data line is inserted into the host.
9. An in-vehicle apparatus, characterized by comprising: interface multiplexing apparatus according to any of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910286681.5A CN110569207A (en) | 2019-04-10 | 2019-04-10 | Interface multiplexing device and vehicle-mounted equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910286681.5A CN110569207A (en) | 2019-04-10 | 2019-04-10 | Interface multiplexing device and vehicle-mounted equipment |
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| CN114817337A (en) * | 2022-06-23 | 2022-07-29 | 深圳市科中云技术有限公司 | Hardware interface type self-adaptive matching method and related device |
| CN114913831A (en) * | 2022-05-10 | 2022-08-16 | 瑞芯微电子股份有限公司 | Method and apparatus for compatibility with different interfaces, electronic device, and storage medium |
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Application publication date: 20191213 |
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