A multi-channel vehicle-mounted Ethernet equipment communication system

Abstract

The invention provides an adapter board and a communication system for vehicle-mounted Ethernet. By converting vehicle-mounted Ethernet signals to a USB interface for transmission, it is convenient for a PC to debug multiple vehicle-mounted Ethernets, directly communicates with a PC through a USB interface, simplifies physical connection, and improves stability. The adapter board for vehicle-mounted Ethernet includes: a first PHY module connected to a vehicle-mounted Ethernet device through a vehicle-mounted Ethernet interface, the first PHY module can convert the vehicle-mounted Ethernet signal from the vehicle-mounted Ethernet interface to an RGMII interface for transmission; a second PHY module connected to the first PHY module through an RGMII interface, the second PHY module can convert the vehicle-mounted Ethernet signal from the RGMII interface to a USB interface for transmission, the second PHY module is connected to a PC through a USB interface, and is powered through the USB interface while transmitting the vehicle-mounted Ethernet signal.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted Ethernet, and in particular to a multi-channel vehicle-mounted Ethernet equipment communication system. Background Art

[0002] With the rapid development and iterative updates of electronic products, most new models currently use in-vehicle Ethernet to varying degrees to achieve large amounts of data transmission to adapt to the increasing number of functions. Since in-vehicle Ethernet is essentially different from traditional Ethernet and cannot communicate directly with a PC, the following problems actually exist during research and development:

[0003] As vehicle gateways gradually integrate 100M and 1000M vehicle Ethernet, a single product usually has multiple vehicle Ethernet channels. Conventional computers generally have only one network port (TX), and it is difficult to debug multiple vehicle Ethernet channels at the same time. The vehicle Ethernet adapter boards available on the market have poor stability and only have 100Base-T1 to 100Base-Tx adapters. When used for research and development and testing, it is often impossible to distinguish whether the problem comes from the product under test or the adapter board. Summary of the invention

[0004] In view of the above problems, the present invention provides an adapter board and communication system for vehicle-mounted Ethernet, which converts the vehicle-mounted Ethernet signal to a USB interface for transmission, facilitates PC debugging of multiple vehicle-mounted Ethernet channels, directly communicates with the PC through the USB interface, simplifies the physical connection, and improves stability.

[0005] The technical solution is as follows: a transfer board for vehicle-mounted Ethernet, characterized in that it includes connected:

[0006] A first PHY module, wherein the first PHY module is connected to a vehicle Ethernet device through a vehicle Ethernet interface, and the first PHY module is capable of converting a vehicle Ethernet signal from the vehicle Ethernet interface to an RGMII interface for transmission;

[0007] The second PHY module is connected to the first PHY module through the RGMII interface, the second PHY module can convert the vehicle Ethernet signal from the RGMII interface to the USB interface for transmission, the second PHY module is connected to the PC through the USB interface, and is powered through the USB interface while transmitting the vehicle Ethernet signal.

[0008] Furthermore, it also includes an MCU module, which is connected to the first PHY module and the second PHY module and is used to switch the first PHY module's support for Gigabit vehicle Ethernet signals and 100M vehicle Ethernet signals.

[0009] Furthermore, the MCU module is connected to a first dip switch, and the first PHY module switches the configuration of Gigabit Vehicle Ethernet / 100M Vehicle Ethernet through the first dip switch.

[0010] Furthermore, the MCU module is connected to a second dip switch, and the second dip switch is used to switch the Master / Slave working mode of the vehicle Ethernet.

[0011] Furthermore, the first PHY module includes a first PHY chip, the model of the first PHY chip is RTL9010, and the second PHY module includes a second PHY chip, the model of the second PHY chip is LAN7801.

[0012] The first PHY module includes a PHY chip U3. The PHY chip U3 is connected to the vehicle Ethernet device through the Gigabit vehicle Ethernet interface. Ports 18 and 19 of the PHY chip U3 are respectively connected to ports 1 and 4 of the TVS diode D2. Ports 2 and 3 of the TVS diode D2 are connected to ports 1 and 4 of L2. Ports 2 and 3 of L2 are respectively connected to capacitors C32 and C33 and then connected to ports 2 and 1 of the 1000Base-T1 connector J2. Inductor L2 is a common-mode inductor for large current injection (BCI) protection. 1000B Ports 3, 4, 5, 6, 7, and 8 of the ASE-T1 connector J2 are grounded, port 2 of the 1000Base-T1 connector J2 is connected to resistor R35, capacitor C44, which are connected to resistors R41 and R42 in parallel and then grounded, port 1 of the 1000Base-T1 connector J2 is connected to resistors R34 and R39, which are connected to resistors R41 and R42 in parallel and then grounded, and there is also a line between resistor R35 and capacitor C44, which is connected to resistor R34 and resistor R39.

[0013] The second PHY module includes a PHY chip U2, and a PHY chip U3 is connected to the PHY chip U2. Ports 29, 28, 27, 26, 25, and 23 of the PHY chip U3 are connected to ports 12, 14, 15, 16, 17, and 13 of the PHY chip U2, and ports 36, 35, 34, 33, 32, and 31 of the PHY chip U3 are connected to ports 8, 6, 5, 4, 9, and 10 of the PHY chip U2; ports 38, 39, 40, 41, 43, and 44 of the PHY chip U2 are respectively connected to ports 2, 3, 8, 9, 5, and 6 of the USB connector J1, ports 4, 7, 10, and 11 of the USB connector J1 are grounded, and port 1 of the USB connector J1 provides a 5V voltage to power the adapter board for in-vehicle Ethernet.

[0014] Ports 12 and 11 of the MCU chip U4 are respectively connected to ports 45 and 46 of the PHY chip U3 and ports 55 and 56 of the PHY chip U2; port 18 of the MCU chip U14 is connected to port 2 of the first dip switch J4; ports 1 and 3 of the first dip switch J4 correspond to the configurations of 100M vehicle-mounted Ethernet 100Base-T and 1000M vehicle-mounted Ethernet 1000Base-T1; port 19 of the MCU chip U4 is connected to port 2 of the second dip switch J3; ports 1 and 3 of the second dip switch J4 correspond to the Master and Slave modes of the vehicle-mounted Ethernet; by adjusting the second dip switch J3, the Master / Slave working mode of the vehicle-mounted Ethernet is switched accordingly.

[0015] A multi-channel vehicle-mounted Ethernet device communication system, characterized in that the multi-channel vehicle-mounted Ethernet devices are connected through multiple adapter boards for vehicle-mounted Ethernet, and the multiple adapter boards for vehicle-mounted Ethernet are respectively connected to USB-HUB devices through USB interfaces, and the USB-HUB devices are connected to a PC.

[0016] The adapter board for vehicle Ethernet of the present invention realizes the conversion of 100M vehicle Ethernet signals and Gigabit vehicle Ethernet signals to the USB interface for transmission, which is convenient for a PC to debug multiple vehicle Ethernets. A general USB-HUB is used in combination with the adapter board for vehicle Ethernet of the present invention to realize communication between a single PC and multiple vehicle Ethernets, avoiding the difficulty in connecting multiple vehicle Ethernets due to the PC having only one network port. At the same time, the adapter board for vehicle Ethernet of the present invention directly communicates with the PC through the USB interface, which simplifies the physical connection and improves the stability. In addition, the adapter board for vehicle Ethernet of the present invention also supports the switching between 100M vehicle Ethernet and Gigabit vehicle Ethernet, and can be simply switched by a switch to convert the vehicle Ethernet interface of 100M vehicle Ethernet / Gigabit vehicle Ethernet to be transmitted through the USB interface, which is directly used for PC debugging. With lower hardware cost, support for Gigabit vehicle Ethernet is achieved, and the research and development cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a module block diagram of a converter board for vehicle-mounted Ethernet in one embodiment;

[0018] Figure 2 is a module block diagram of a converter board for vehicle-mounted Ethernet in another embodiment;

[0019] Figure 3 is a circuit schematic diagram of a first PHY module in an embodiment;

[0020] Figure 4 is a circuit schematic diagram of the second PHY module in the embodiment;

[0021] Figure 5 is a circuit schematic diagram of the USB connector J1 in the embodiment;

[0022] Figure 6 is a circuit schematic diagram of the voltage conversion chip U1 in the embodiment;

[0023] Figure 7 is a circuit schematic diagram of the MCU module in the embodiment;

[0024] Figure 8 This is a circuit schematic diagram of the first DIP switch J4 in the embodiment;

[0025] Fig. 9 is a circuit schematic diagram of the second code switch J3 in the embodiment;

[0026] Fig.10 A circuit schematic diagram of the BDM debugging connector in the embodiment;

[0027] Fig.11 is a circuit schematic diagram of a reset unit in an embodiment;

[0028] Fig.12 is a schematic block diagram of a communication system in an embodiment. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0030] See Figure 1 , a switching board for vehicle-mounted Ethernet of the present invention comprises connected:

[0031] A first PHY module 1, the first PHY module 1 is connected to a vehicle Ethernet device through a vehicle Ethernet interface 2, and the first PHY module 1 can convert a vehicle Ethernet signal from the vehicle Ethernet interface 2 to an RGMII interface for transmission;

[0032] The second PHY module 3 is connected to the first PHY module 1 through the RGMII interface. The second PHY module 3 can convert the vehicle Ethernet signal from the RGMII interface to the USB interface 4 for transmission. The second PHY module 3 is connected to the PC through the USB interface 4 and is powered by the USB interface 4 while transmitting the vehicle Ethernet signal.

[0033] See Figure 2 In one embodiment, Figure 1 On the basis of the module, it also includes an MCU module 5, which is connected to the first PHY module and is used to switch the first PHY module's support for Gigabit vehicle Ethernet signals and 100M vehicle Ethernet signals.

[0034] The adapter board for vehicle-mounted Ethernet in this embodiment realizes the conversion of 100M vehicle-mounted Ethernet signals and Gigabit vehicle-mounted Ethernet signals to the USB interface for transmission, which is convenient for the PC to debug multi-channel vehicle-mounted Ethernet and directly communicate with the PC through the USB interface, which simplifies the physical connection and improves the stability. It realizes the support for Gigabit vehicle-mounted Ethernet with lower hardware cost and reduces the research and development cost.

[0035] See Figures 3 to 11 Specifically, in one embodiment of the present invention, the first PHY module includes a PHY chip U3, the model of the PHY chip U3 is RTL9010, the PHY chip U3 is connected to the vehicle Ethernet device through the Gigabit vehicle Ethernet interface, and the ports 18 and 19 of the PHY chip U3 are used to connect to the 1000Base-T1 connector J2.

[0036] The PHY chip U3 can convert the in-vehicle Ethernet signal from the 1000Base-T1 interface to the RGMII interface for transmission. The specific connection between the PHY chip U3 and the 1000Base-T1 connector J2 includes: the 18th and 19th ports of the PHY chip U3 are respectively connected to the 1st and 4th ports of the TVS diode D2, the 2nd and 3rd ports of the TVS diode D2 are connected to the 1st and 4th ports of L2, the 2nd and 3rd ports of L2 are respectively connected to the capacitors C32 and C33 and then connected to the 2nd and 1st ports of the 1000Base-T1 connector J2. The inductor L2 is a common-mode inductor for large current injection (BCI) protection. , ports 3, 4, 5, 6, 7, and 8 of the 1000Base-T1 connector J2 are grounded, port 2 of the 1000Base-T1 connector J2 is connected to resistor R35, capacitor C44, resistor R41 and resistor R42 in parallel, and then grounded, port 1 of the 1000Base-T1 connector J2 is connected to resistor R34 and resistor R39, which are connected to resistor R41 and resistor R42 in parallel, and there is a line between resistor R35 and capacitor C44 connected to resistor R34 and resistor R39, port 19 of the PHY chip U3 is connected to crystal oscillator X1, and the model of crystal oscillator X1 is OSC_125MHz.

[0037] The second PHY module is connected to the first PHY module. In the present embodiment, the second PHY module includes a PHY chip U2, the model of which is LAN7801. The PHY chip U3 is connected to the PHY chip U2. Ports 29, 28, 27, 26, 25, and 23 of the PHY chip U3 are connected to ports 12, 14, 15, 16, 17, and 13 of the PHY chip U2. Ports 36, 35, 34, 33, 32, and 31 of the PHY chip U3 are connected to ports 8, 6, 5, 4, 9, and 10 of the PHY chip U2.

[0038] The second PHY module can convert the vehicle Ethernet signal from the RGMII interface to the USB interface for transmission, which is used to transmit the vehicle Ethernet network signal. Figure 5 , 6 In this embodiment, ports 38, 39, 40, 41, 43, and 44 of the PHY chip U2 are respectively connected to ports 2, 3, 8, 9, 5, and 6 of the USB connector J1, and ports 4, 7, 10, and 11 of the USB connector J1 are grounded. The USB connector J1 adopts a USB3.1 connector. Port 1 of the USB connector J1 can provide a 5V voltage VBUS_5V to power the adapter board for in-vehicle Ethernet. The 5V voltage is input to port 29 of the PHY chip U2, and the 5V voltage is also converted to a 3.3V voltage output by the voltage conversion chip U1. Port 5 of the voltage conversion chip U1 inputs the 5V voltage VBUS_5V, and port 3 of the voltage conversion chip U1 outputs VCC_3V3. The model of the voltage conversion chip U1 is MPQ20051.

[0039] See Figure 7 In one embodiment of the present invention, the MCU module is connected to the first PHY module and the second PHY module to switch the first PHY module's support for Gigabit vehicle Ethernet signals and 100M vehicle Ethernet signals. Ports 12 and 11 of the MCU chip U4 are respectively connected to ports 45 and 46 of the PHY chip U3 and ports 55 and 56 of the PHY chip U2. The model of the MCU chip U4 used in the MCU module is S32K142.

[0040] See Figure 8 The MCU module is connected to a first dip switch, and the first PHY module switches the configuration of Gigabit Vehicle Ethernet / 100M Vehicle Ethernet through the first dip switch. Specifically in this embodiment, port 18 of the MCU chip U14 is connected to port 2 of the first dip switch J4, and ports 1 and 3 of the first dip switch J4 correspond to the configurations of 100M Vehicle Ethernet 100Base-T and Gigabit Vehicle Ethernet 1000Base-T1, respectively.

[0041] See Fig. 9The MCU module is connected to a second dip switch, which is used to switch the Master / Slave working mode of the vehicle Ethernet. In this embodiment, port 19 of the MCU chip U4 is connected to port 2 of the second dip switch J3, and ports 1 and 3 of the second dip switch J4 correspond to the Master and Slave modes of the vehicle Ethernet, respectively. By adjusting the second dip switch J3, the Master / Slave working mode of the vehicle Ethernet is switched accordingly.

[0042] See Fig.10 The MCU module is also connected to a BDM debugging connector. Specifically in this embodiment, ports 6, 21, 8, and 7 of the MCU chip U4 are connected to ports 2, 3, 8, and 9 of the BDM debugging connector J5, port 1 of the BDM debugging connector J5 is connected to a 3.3V power supply, and ports 4 and 10 of the BDM debugging connector J5 are grounded.

[0043] Specifically in this embodiment, see Fig.11 , and also includes a reset unit, which includes a reset chip M1. The model of the reset chip M1 is SGM811B. Port 2 of the reset chip M1 is respectively connected to ports 32 and 47 of the PHY chip U2, port 6 of the MCU chip U4, and port 5 of the PHY chip U3, supporting the reset function for the first PHY module, the second PHY module, and the MCU module.

[0044] The adapter board for vehicle Ethernet provided in this embodiment converts the 100Base-T1 / 1000Base-T1 vehicle Ethernet interface into a universal USB interface for direct PC debugging, which facilitates the use of USB-HUB to expand to multiple channels while simplifying the physical connection to improve signal transmission stability.

[0045] In this embodiment, RTL9010 is used to realize the conversion from 100Base-T1 / 1000Base-T1 to RGMII interface; LAN780 is used to realize the conversion from RGMII interface to USB, and the conversion from USB-T1 interface is indirectly realized by using PHY-PHY connection mode;

[0046] In this embodiment, the MCU module adopts a general 8-bit single-chip microcomputer, and realizes 100Base-T1 / 1000Base-T1 and Master / Slave configuration conversion respectively through the dip switch. The USB interface powers the adapter board and is also used for communication. USB3.1 is used to meet the bandwidth requirements of Gigabit network communication, and is compatible with USB2.0 to meet the general 100M network bandwidth requirements. Through lower hardware cost, support for 100M / 1000M vehicle-mounted Ethernet is achieved, reducing R&D costs.

[0047] See Fig.12In addition, in an embodiment of the present invention, a multi-channel vehicle-mounted Ethernet device communication system is also provided, wherein the multi-channel vehicle-mounted Ethernet devices are connected through a plurality of the above-mentioned adapter boards for vehicle-mounted Ethernet, and the multiple adapter boards for vehicle-mounted Ethernet are respectively connected to USB-HUB devices through USB interfaces, and the USB-HUB device is connected to a PC. The communication system of the present invention realizes communication between a single PC and multi-channel vehicle-mounted Ethernet, which is convenient for debugging more and more vehicle equipment with multi-channel vehicle-mounted Ethernet, such as new energy vehicles, and has good practical value.

[0048] It should be noted that a person of ordinary skill in the art can realize that in the several embodiments provided in the present application, the disclosed circuits and systems can be implemented in other ways. For example, the circuit embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or modules, which can be electrical, mechanical or other forms.

[0049] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0050] In addition, each functional module in each embodiment of the present invention may be a separate module physically existing, or two or more modules may be integrated into one module.

[0051] Although the above embodiments describe the embodiments of the present invention in conjunction with the drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A multi-channel vehicle-mounted Ethernet device communication system, characterized in that: The invention comprises a plurality of adapter boards for vehicle-mounted Ethernet, wherein the adapter boards for vehicle-mounted Ethernet include connected: A first PHY module, wherein the first PHY module is connected to a vehicle Ethernet device through a vehicle Ethernet interface, and the first PHY module is capable of converting a vehicle Ethernet signal from the vehicle Ethernet interface to an RGMII interface for transmission; a second PHY module, wherein the second PHY module is connected to the first PHY module through an RGMII interface, the second PHY module is capable of converting an in-vehicle Ethernet signal from the RGMII interface to a USB interface for transmission, the second PHY module is connected to a PC through the USB interface, and is powered through the USB interface while transmitting the in-vehicle Ethernet signal; Connecting multiple vehicle-mounted Ethernet devices through multiple adapter boards for vehicle-mounted Ethernet, connecting multiple adapter boards for vehicle-mounted Ethernet to USB-HUB devices through USB interfaces respectively, and connecting the USB-HUB devices to a PC; The first PHY module includes a first PHY chip, the model of the first PHY chip is RTL9010, the second PHY module includes a second PHY chip, the model of the second PHY chip is LAN7801; The first PHY module includes a PHY chip U3, which is connected to the vehicle Ethernet device through a Gigabit vehicle Ethernet interface. Ports 18 and 19 of the PHY chip U3 are connected to ports 1 and 4 of the TVS diode D2, ports 2 and 3 of the TVS diode D2 are connected to ports 1 and 4 of L2, ports 2 and 3 of L2 are connected to capacitors C32 and C33, and then to ports 2 and 1 of the 1000Base-T1 connector J2. Inductor L2 is a common-mode inductor used for large current injection protection. , ports 3, 4, 5, 6, 7, and 8 of the 1000Base-T1 connector J2 are grounded, port 2 of the 1000Base-T1 connector J2 is connected to resistor R35, capacitor C44 is connected to resistor R41 and resistor R42 in parallel, and then grounded, port 1 of the 1000Base-T1 connector J2 is connected to resistor R34 and resistor R39, which are connected to resistor R41 and resistor R42 in parallel, and there is also a line between resistor R35 and capacitor C44 connected to resistor R34 and resistor R39; The second PHY module includes a PHY chip U2, and a PHY chip U3 is connected to the PHY chip U2. Ports 29, 28, 27, 26, 25, and 23 of the PHY chip U3 are connected to ports 12, 14, 15, 16, 17, and 13 of the PHY chip U2, and ports 36, 35, 34, 33, 32, and 31 of the PHY chip U3 are connected to ports 8, 6, 5, 4, 9, and 10 of the PHY chip U2; ports 38, 39, 40, 41, 43, and 44 of the PHY chip U2 are respectively connected to ports 2, 3, 8, 9, 5, and 6 of the USB connector J1, ports 4, 7, 10, and 11 of the USB connector J1 are grounded, and port 1 of the USB connector J1 provides a 5V voltage to power the adapter board for in-vehicle Ethernet.

2. A multi-channel vehicle-mounted Ethernet device communication system according to claim 1, characterized in that: It also includes an MCU module, which is connected to the first PHY module and the second PHY module and is used to switch the first PHY module's support for Gigabit vehicle Ethernet signals and 100M vehicle Ethernet signals.

3. A multi-channel vehicle-mounted Ethernet device communication system according to claim 2, characterized in that: The MCU module is connected to a first dip switch, and the first PHY module switches the configuration of Gigabit Vehicle Ethernet / 100M Vehicle Ethernet through the first dip switch.

4. A multi-channel vehicle-mounted Ethernet device communication system according to claim 2, characterized in that: The MCU module is connected to a second dip switch, and the second dip switch is used to switch the Master / Slave working mode of the vehicle Ethernet.

5. A multi-channel vehicle-mounted Ethernet device communication system according to claim 2, characterized in that: Ports 12 and 11 of the MCU chip U4 are respectively connected to ports 45 and 46 of the PHY chip U3 and ports 55 and 56 of the PHY chip U2; port 18 of the MCU chip U14 is connected to port 2 of the first dip switch J4; ports 1 and 3 of the first dip switch J4 correspond to the configurations of 100M vehicle-mounted Ethernet 100Base-T and 1000M vehicle-mounted Ethernet 1000Base-T1; port 19 of the MCU chip U4 is connected to port 2 of the second dip switch J3; ports 1 and 3 of the second dip switch J4 correspond to the Master and Slave modes of the vehicle-mounted Ethernet; by adjusting the second dip switch J3, the Master / Slave working mode of the vehicle-mounted Ethernet is switched accordingly.

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