CN213024391U

CN213024391U - Vehicle-mounted terminal serial port expansion equipment

Info

Publication number: CN213024391U
Application number: CN202022232506.9U
Authority: CN
Inventors: 冀英超; 朱磊; 张树民; 任云赛
Original assignee: Mushroom Car Union Information Technology Co Ltd
Current assignee: Mushroom Car Union Information Technology Co Ltd
Priority date: 2020-10-09
Filing date: 2020-10-09
Publication date: 2021-04-20
Anticipated expiration: 2030-10-09

Abstract

The embodiment of the utility model provides a vehicle terminal serial ports extension equipment, include: the system comprises a USB hub, a first data forwarding module, a second data forwarding module, an RSS232 module and an RS485 module; the USB hub is respectively connected with the first data forwarding module and the second data forwarding module in a USB mode; the first data forwarding module is connected with the RSS232 module, and the second data forwarding module is connected with the RS485 module. After the USB hub is connected through the USB interface on the vehicle-mounted terminal, 3 RS232 and 3 RS485 communication interfaces can be developed through data forwarding processing of the first data forwarding module and the second data forwarding module respectively, the number of serial communication interfaces of the vehicle-mounted terminal is expanded, and great convenience is brought to further function and application development.

Description

Vehicle-mounted terminal serial port expansion equipment

Technical Field

The utility model relates to the field of communication technology, especially, relate to a vehicle-mounted terminal serial ports extension equipment.

Background

The conventional vehicle network vehicle-mounted terminal main processor is provided with a few integrated serial interfaces, and cannot meet the requirement of simultaneously connecting various serial communication peripherals. The car machine of planting in the car networking trade is responsible for gathering various vehicle states, has must have multiple sensor, is subject to vehicle-mounted terminal serial communication interface quantity, brings very big puzzlement for vehicle-mounted terminal multifunctionality development.

In the prior art, a USB docking station is externally connected with a USB, a plurality of USB interfaces are developed, and then a communication interface conversion module is connected to each USB interface, so that the USB docking station is inconvenient to use, and limited by the expansion capability of the USB docking station, and cannot realize expansion of a large number of communication serial ports.

Therefore, how to better realize the serial port expansion of the vehicle-mounted terminal becomes a problem to be solved urgently in the industry.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a vehicle-mounted terminal serial ports extension equipment for solve the technical problem who proposes in the above-mentioned background art, or at least partial solution the technical problem who proposes in the above-mentioned background art.

In a first aspect, an embodiment of the utility model provides a vehicle-mounted terminal serial ports expanding equipment, include:

the system comprises a USB hub, a first data forwarding module, a second data forwarding module, an RSS232 module and an RS485 module;

the USB hub is respectively connected with the first data forwarding module and the second data forwarding module in a USB mode;

the first data forwarding module is connected with the RSS232 module, and the second data forwarding module is connected with the RS485 module.

More specifically, the first data forwarding module and the second data forwarding module each include: the power supply module is respectively connected with the microprocessor module and the reset module.

More specifically, the microprocessor is a microprocessor, microcontroller, or programmable logic device.

More specifically, the first data forwarding module and the second data forwarding module each further include: at least 1 USB controller.

More specifically, the first data forwarding module and the second data forwarding module each further include: at least 3 UART controllers.

More specifically, the RSS232 module is a three-channel RSS232 module.

More specifically, the RS485 module is a three-channel RS485 module.

The embodiment of the utility model provides a pair of vehicle-mounted terminal serial ports extension equipment, through the USB interface connection USB concentrator on the vehicle-mounted terminal after, respectively through the data forwarding processing of first data forwarding module and second data forwarding module, can develop 3 way RS232 and 3 way RS485 communication interfaces, expanded vehicle-mounted terminal serial ports communication interface quantity, brought very big facility for further function and application development.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a serial port expansion device of a vehicle-mounted terminal described in an embodiment of the present invention;

fig. 2 is an application schematic diagram of the serial port expansion device of the vehicle-mounted terminal according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Fig. 1 is a schematic diagram of a serial port expansion device of a vehicle-mounted terminal described in an embodiment of the present invention, as shown in fig. 1, including: a USB hub 110, a first data forwarding module 120, a second data forwarding module 130, an RSS232 module 140, and an RS485 module 150;

the USB hub 110 is respectively connected to the first data forwarding module 120 and the second data forwarding module 130 through USB;

the first data forwarding module 120 is connected to the RSS232 module 140, and the second data forwarding module 130 is connected to the RS485 module 150.

Specifically, the embodiment of the utility model provides an in USB concentrator and vehicle terminal are connected and are connected through USB, the USB concentrator pass through USB respectively in first data forwarding module, second data forwarding module connects. The first data forwarding module is connected with the RS232 module and forwards the USB data to the channel corresponding to the RS232 module. And the second data forwarding module is connected with the RS485 module and forwards the USB data to a channel corresponding to the RS485 module. And the RS232 module is responsible for converting the TTL signals into RS232 signals. And the RS485 module is responsible for converting the TTL signal into an RS485 signal.

The USB of the first data forwarding module distinguishes the data forwarded by the USB hub through a Communication Device Class (CDC) protocol, namely, the interface serial number of each node is distinguished, when the first data forwarding module receives the data sent by the USB hub, the data are forwarded to a corresponding UART controller in the first data forwarding module according to the interface serial number, the UART controller sends the data to a channel corresponding to the RS232 module as TTL signals, and the channel corresponding to the RS232 module converts the TTL signals into RS232 signals and sends the RS232 signals to the peripheral.

The USB of the second data forwarding module also distinguishes the data forwarded by the USB hub through a CDC protocol, namely, the interface serial numbers of all nodes are distinguished, when the second data forwarding module receives the data sent by the USB hub, the data are forwarded to the corresponding UART controller in the second data forwarding module according to the interface serial numbers, the UART controller sends the data to the channel corresponding to the RS485 module as TTL signals, and the channel corresponding to the RS485 module converts the TTL signals into RS485 signals and then sends the RS485 signals to the peripheral.

The embodiment of the utility model provides a through the USB interface on the vehicle mounted terminal, connect the USB concentrator after, respectively through the data forwarding processing of first data forwarding module and second data forwarding module, can develop 3 way RS232 and 3 way RS485 communication interfaces, expanded vehicle mounted terminal serial ports communication interface quantity, brought very big facility for further function and application development.

The microprocessor is a microprocessor, microcontroller or programmable logic device.

The first data forwarding module and the second data forwarding module each further include: at least 1 USB controller.

The first data forwarding module and the second data forwarding module each further include: at least 3 UART controllers.

Specifically, the embodiment of the utility model provides a 3 UART controllers that describe correspond with the three passageway in RSS232 module and RS485 module respectively, when the data forwarding module received the data that USB interface module sent, according to the interface sequence number, with data forwarding to the UART controller that corresponds, this UART controller sends data to the passageway that RSS232 module or RS485 module correspond with the TTL signal.

Specifically, the USB of the first data forwarding module distinguishes data forwarded by the USB hub through a Communication Device Class (CDC) protocol, that is, distinguishes data forwarded by the USB hub through interface serial numbers of each node, when the first data forwarding module receives the data sent by the USB hub, the data is forwarded to a corresponding UART controller in the first data forwarding module according to the interface serial numbers, the UART controller sends the data to a channel corresponding to the RS232 module as TTL signals, and the channel corresponding to the RS232 module converts the TTL signals into RS232 signals and sends the RS232 signals to the peripheral.

For example, fig. 2 is the utility model discloses a vehicle-mounted terminal serial ports extension apparatus that embodiment described uses the sketch map, as shown in fig. 2, vehicle-mounted terminal uses the virtual serial ports 1 of operation in the USB concentrator to send data, the interface serial number of the data that first data forwarding module received is 1, first data forwarding module forwards data to UART1 controller, UART1 controller sends data to the passageway 1 of RS233 module with the TTL signal, passageway 1 is responsible for sending the peripheral hardware after converting the TTL signal into the RS232 signal, accomplish data transmission.

When the channel 1 of the RS232 module receives data sent by the peripheral, the RS232 signal is converted into a TTL signal and sent to the UART1 controller of the first data forwarding module, and the first data forwarding module forwards the data received by the UART1 controller to the virtual serial port with interface 1 in the USB hub, thereby completing data reception.

The embodiment of the utility model provides a behind the USB hub of USB interface connection on through vehicle-mounted terminal, respectively through the data forwarding processing of first data forwarding module and second data forwarding module, can develop 3 way RS232 and 3 way RS485 communication interfaces, expanded vehicle-mounted terminal serial ports communication interface quantity, brought very big facility for further function and application development.

On the basis of the above embodiment, the RSS232 module is a three-channel RSS232 module. The RS485 module is a three-channel RS485 module.

Specifically, the RSS232 module specifically includes: RSS232 channel 1, RSS232 channel 2, and RSS232 channel 3.

Specifically, the RS485 module specifically includes: RS485 channel 1, RS485 channel 2 and RS485 channel 3.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a vehicle-mounted terminal serial ports extension equipment which characterized in that includes: the system comprises a USB hub, a first data forwarding module, a second data forwarding module, an RSS232 module and an RS485 module;

2. The serial port expansion device of the vehicle-mounted terminal according to claim 1, wherein the first data forwarding module and the second data forwarding module each comprise: the power supply module is respectively connected with the microprocessor module and the reset module.

3. The serial port expansion device of the vehicle-mounted terminal according to claim 2, wherein the microprocessor is a microprocessor, a microcontroller or a programmable logic device.

4. The serial port expansion device of the vehicle-mounted terminal according to claim 2, wherein the first data forwarding module and the second data forwarding module each further comprise: at least 1 USB controller.

5. The serial port expansion device of the vehicle-mounted terminal according to claim 2, wherein the first data forwarding module and the second data forwarding module each further comprise: at least 3 UART controllers.

6. The serial port expansion device of the vehicle-mounted terminal according to claim 1, wherein the RSS232 module is a three-channel RSS232 module.

7. The serial port expansion device of the vehicle-mounted terminal of claim 1, wherein the RS485 module is a three-channel RS485 module.