WO2016015331A1

WO2016015331A1 - Interface integrated circuit for vehicle diagnosis/programming and vehicle diagnostic instrument

Info

Publication number: WO2016015331A1
Application number: PCT/CN2014/083546
Authority: WO
Inventors: 李红京; 成转鹏; 庞海波
Original assignee: 深圳市道通科技股份有限公司
Priority date: 2014-08-01
Filing date: 2014-08-01
Publication date: 2016-02-04
Also published as: CN107076981A; CN107076981B

Abstract

An interface integrated circuit for vehicle diagnosis/programming and a vehicle diagnostic instrument comprising the interface integrated circuit, and a communication method for transmitting data between a microprocessor and an on-board diagnostic system via the interface integrated circuit, and a corresponding communication system. An interface integrated circuit (200) comprises: a communication control unit (110) comprising a plurality of communication protocol core modules, wherein each communication protocol core module performs signal conversion according to a communication protocol and each communication protocol core module can switch between a vehicle condition query and parameter setting mode and a vehicle condition acquisition mode; and a port drive unit (120) comprising a plurality of drivers, wherein each of the plurality of drivers comprises a plurality of drive modules, and the plurality of drive modules are correspondingly connected to the corresponding communication protocol core modules in the communication control unit (110) and appropriately convert a signal level so as to meet signal level requirements of different communication protocols, so that a random combination of the transceiving of signals of a plurality of communication protocols can be obtained so as to be flexibly suitable for a plurality of vehicle models.

Description

Interface integrated circuit for vehicle diagnostics/programming and vehicle diagnostics

Field of the Invention This invention relates generally to the field of vehicle diagnostics, and more particularly to interface integrated circuits for vehicle diagnostics/programming and vehicle diagnostics including the interface integrated circuits.

Furthermore, the present invention relates to a communication method and a corresponding communication system for data transmission between a microprocessor and an on-board diagnostic system via the above-described interface integrated circuit. Background technique

With the development of technology, the complexity of vehicles is increasing, and the application of electronic control technology in vehicles is becoming more and more extensive. In order to facilitate the diagnosis of the condition of a vehicle equipped with an Electronic Control Unit (ECU), on-board diagnostic systems (ODDs) and vehicle diagnostics have been developed. In vehicle diagnosis, the vehicle diagnostics establishes a communication connection with 0BD through a vehicle diagnostic/programming interface provided on the vehicle, transmits a vehicle condition inquiry signal and a parameter setting signal to the 0BD, and receives a vehicle condition characterizing signal from 0BD. However, vehicle diagnostic/programming interfaces on different types of vehicles tend to support different communication protocols, resulting in not only the need to design different interface circuits for different communication protocols, but also the lack of versatility of current vehicle diagnostics. Summary of the invention

The present invention has been made in order to improve the versatility of vehicle diagnostic equipment and achieve other purposes. In one aspect, the present invention provides an interface integrated circuit for vehicle diagnostics/programming, the interface integrated circuit being coupled between an external microprocessor and an external vehicle diagnostic/programming interface, the vehicle diagnostic/programming interface Further connected to the onboard diagnostic system for diagnostic/programming of the vehicle electronic control unit, the interface integrated circuit comprising:

a communication control unit, the communication control unit includes a plurality of communication protocol core modules, each communication protocol core module receives and transmits data according to a communication protocol, and each communication protocol core module can be in a vehicle condition inquiry and parameter setting mode And switching between vehicle condition acquisition modes;

a port drive unit, the port drive unit includes a plurality of drives, the plurality of drives Each of the drivers includes a plurality of drive modules, and each of the plurality of drive modules is correspondingly coupled to a respective one of the plurality of communication protocol core modules of the communication control unit;

For the communication control unit, in the vehicle condition inquiry and parameter setting mode, each communication protocol core module receives a vehicle condition inquiry signal and/or a parameter setting signal from the microprocessor that conforms to the corresponding communication protocol, and converts it into a suitable The vehicle condition inquiry signal and/or the parameter setting signal received by the correspondingly connected driving module is then transmitted to the correspondingly connected driving module; in the vehicle condition acquisition mode, each communication protocol core module receives the driving module from the corresponding connection a vehicle condition characterization signal conforming to a corresponding communication protocol, converting it to a vehicle condition characterization signal suitable for receipt by the microprocessor and transmitting to the microprocessor;

For the port driving unit, in the vehicle condition inquiry and parameter setting mode, each driving module receives a vehicle condition inquiry signal or a parameter setting signal from a correspondingly connected communication protocol core module that conforms to a corresponding communication protocol, and the vehicle is The signal level of the status inquiry signal or the parameter setting signal is converted into a signal level suitable for processing by the onboard diagnostic system, and the converted vehicle condition inquiry signal or parameter setting signal is transmitted to the onboard diagnostic system via the vehicle diagnosis/programming interface. In the vehicle condition acquisition mode, each of the drive modules receives a vehicle condition characterization signal from the onboard diagnostic system via the vehicle diagnostic/programming interface, converting the signal level of the vehicle condition characterization signal to a communication protocol suitable for being correspondingly connected The core module and the signal level processed by the microprocessor, and transmitting the converted vehicle condition characterization signal to the correspondingly connected communication protocol core module.

In a preferred embodiment, the plurality of communication protocol core modules of the communication control unit include an HSCAN core module, a SWCAN core module, an LSCAN core module, a 708 708 core module, a J1850-PWM core module, and a J1850-VPW core module. Two or more of the KSCI core module and the KN core module, correspondingly, the plurality of driving modules of each driver of the port driving unit include an HSCAN driving module, a SWCAN driving module, an LSCAN driving module, and a 708 708 driving module Two or more of J1850-PWM driver module, J1850-VPW driver module, K/SCI driver module and KN driver module.

In a preferred embodiment, the interface integrated circuit further includes a digital logic control unit coupled to the communication control unit and the port drive unit, The selection of the communication channel is controlled by the port drive unit and the communication control unit is controlled to select a communication mode.

In a preferred embodiment, the interface integrated circuit further includes a programming voltage unit coupled to the digital logic control unit for generating an operating voltage required to program the vehicle electronic control unit.

In a preferred embodiment, the interface integrated circuit further includes an internal power supply unit coupled to the various units within the interface integrated circuit to generate the voltage required for operation of the interface integrated circuit for vehicle diagnostic/programming.

In a preferred embodiment, the interface integrated circuit further includes an analog to digital conversion sampling unit coupled to the digital logic control unit and the communication control unit to characterize the vehicle condition from the onboard diagnostic system The analog signal is sampled and converted to a digital signal.

In a preferred embodiment, the interface integrated circuit further includes an over temperature protection unit connected to the digital logic control unit to detect the temperature of the interface integrated circuit for vehicle diagnosis/programming, and When it is detected that the temperature of the interface integrated circuit for vehicle diagnosis/programming exceeds a threshold value, a signal indicating that the entire interface integrated circuit for vehicle diagnosis/programming or other units therein is stopped is issued.

In another aspect, the present invention also provides a vehicle diagnostic apparatus comprising the above-described interface integrated circuit for vehicle diagnosis/programming.

In still another aspect, the present invention also provides a communication method for data communication between a microprocessor and an on-board diagnostic system through a communication control unit and a port drive unit, the communication control unit including a plurality of communication protocol cores a module, each communication protocol core module receives and transmits data according to a communication protocol, and each communication protocol core module is switchable between a vehicle condition inquiry and parameter setting mode, and a vehicle condition acquisition mode; the port driving unit includes a plurality of drivers, each of the plurality of drivers includes a plurality of drive modules, and each of the plurality of drive modules is correspondingly connected to a corresponding one of the plurality of communication protocol core modules of the communication control unit; The communication method is characterized in that

In the vehicle status inquiry and parameter setting mode,

(1) each communication protocol core module in the communication control unit receives a vehicle condition inquiry signal and/or a parameter setting signal from the microprocessor in accordance with a corresponding communication protocol, and turns it Switching to a vehicle condition inquiry signal and/or a parameter setting signal received by the correspondingly connected driving module, and then transmitting the signal to the correspondingly connected driving module;

(2) each driving module receives a vehicle condition inquiry signal or a parameter setting signal corresponding to a corresponding communication protocol from a correspondingly connected communication protocol core module, and converts a signal level of the vehicle condition inquiry signal or the parameter setting signal into a suitable one. a signal level processed by the onboard diagnostic system, and transmitting the converted vehicle condition inquiry signal or parameter setting signal to the onboard diagnostic system via the vehicle diagnostic/programming interface;

In the vehicle condition acquisition mode,

(3) each of the port drive units receives a vehicle condition characterization signal from the onboard diagnostic system via the vehicle diagnostic/programming interface, converting the signal level of the vehicle condition characterization signal to a communication protocol core suitable for being correspondingly connected a module and a signal level processed by the microprocessor, and transmitting the converted vehicle condition characterization signal to a correspondingly connected communication protocol core module;

(4) each communication protocol core module receives a vehicle condition characterization signal from a correspondingly connected drive module in accordance with a corresponding communication protocol, converts it into a vehicle condition characterization signal suitable for receipt by the microprocessor, and then transmits to the micro processor.

In addition, the present invention also provides a communication system for vehicle diagnosis/programming, comprising: a microprocessor;

a vehicle diagnostic/programming interface to the on-board diagnostic system for diagnostic/programming of the vehicle electronic control unit;

According to the interface integrated circuit for vehicle diagnostics/programming described above, the interface integrated circuit is connected between the microprocessor and the vehicle diagnostic/programming interface to perform data between the microprocessor and the onboard diagnostic system Communication.

By using a combination of a communication control unit including a plurality of communication protocol core modules and a port driving unit including a plurality of drivers, the present invention enables an arbitrary combination of transmission and reception of signals of a plurality of communication protocols, thereby being flexibly applicable to a plurality of types. Model. In addition, when a drive is damaged, it does not affect the operation of the communication link corresponding to other drives. DRAWINGS

The above and other aspects, features and advantages of the present invention will be apparent from the description of the appended claims. In the drawing: 1 is a schematic diagram of one embodiment of an interface integrated circuit for vehicle diagnostics/programming in accordance with the present invention.

2 is a schematic diagram showing in more detail one embodiment of an interface integration circuit for vehicle diagnostics/programming in accordance with the present invention.

3 is a block diagram of a connection between an interface integrated circuit for vehicle diagnostics/programming and a microprocessor and vehicle diagnostic/programming interface in accordance with the present invention.

Figure 4 shows in more detail the connections between the various units within the interface integrated circuit of Figure 3. detailed description

Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

In the context of the present invention, the term "vehicle" includes land vehicles, amphibians, boats and aircraft. In addition, the term "diagnostics/programming interface" refers to an interface for diagnosis and/or programming.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic illustration of one embodiment of an interface integrated circuit for vehicle diagnostics/programming in accordance with the present invention.

An interface integrated circuit for vehicle diagnosis/programming includes a communication control unit 110 and a port drive unit 120.

The communication control unit 110 includes a plurality of communication protocol core modules, for example, one or more HSCAN core modules 111, SWCAN core modules 112, LSCAN core modules 113, J1708 core modules 114, J1850-PWM core modules 115, J1850-VPW core modules. 116. KSCI Core Module 117 and KN Core Module 118, including any combination of one or more of them. The communication protocol core module may be a bus transceiver capable of supporting a plurality of communication protocols, or may further include a communication interface for transmitting signals such as clock, data, enable control, and the like.

The port drive unit 120 includes a plurality of drivers, such as thirteen drivers 1201A, 1201B, ..., 1201K, and 1201L. For the sake of simplicity, only one driver 1201A is shown in FIG. The driver 1201A includes a plurality of driving modules 121A-128A, for example, HSCAN driving module 121A, SWCAN driving module 122A, LSCAN driving module 123A, J1708 driving module 124A, J1850-PWM driving module 125A, J1850-VPW driving module 126A, K/SCI The drive module 127A and the KN drive module 128A. Each drive module in the drive Connected to a corresponding communication protocol core module in the communication control unit, for example, the HSCAN driver module 121A is connected to the HSCAN core module 111, the SWCAN driver module 122A is connected to the SWCAN core module 112, and the LSCAN driver module 123A is connected to the LSCAN core module 11 3 The J 1708 driver module 124A is connected to the 708 708 core module 114, the J 1850-PWM driver module 125A is connected to the J 1850-PWM core module 115, and the J 1850-VPW driver module 126A is connected to the J 1850-VPW core module 116, K/ The SCI driver module 127A is coupled to the KSCI core module 117, and the KN driver module 128A is coupled to the KN core module 118.

Preferably, the external input/output interfaces of the plurality of driving modules 121A-128A of the driver 1201A may be one. For example, all the driving modules in the 1201A are connected to one pin P0RT1 of the interface integrated circuit, and all the driving modules in the 1201B. Both are connected to another pin of the interface integrated circuit P0RT2 and so on.

Additionally, preferably, each driver can be implemented with multiple sets of MOSs.

Similar to Fig. 1, the port drive unit 120 of Fig. 2 may also include a plurality of drivers, such as thirteen drivers 1201A, 1201B, ..., 1201K, and 1201L. For the sake of simplicity, only 1201A and 1201B are shown schematically in FIG. Each of the drivers 1201A, 1201B, ..., 1201K and 1201L may include an HSCAN drive module, a SWCAN drive module, an LSCAN drive module, a 708 708 drive module, a J 1850-PWM drive module, a J 1850-VPW drive module, K/SCI driver module and KN driver module. The respective drive modules of each drive may be in the same manner as the respective drive modules of the drive 1201A in FIG. 1, respectively, with the HSCAN core module 111, the SWCAN core module 112, the LSCAN core module 113, and the J 1708 core in the communication control unit 110. Module 114, J 1850-PWM core module 115, J 1850-VPW core module 116, KSCI core module 117 and KN core module 118 are connected. With such a configuration, it is possible to obtain an arbitrary combination of transmission and reception of signals of a plurality of communication protocols, for example, four of thirteen drivers for HSCAN communication, four for 708 communication, and five for KSCI communication, thereby enabling Flexible for communication needs of multiple models. Moreover, parallel processing can be implemented to achieve more efficient communication efficiency. In addition, when a certain drive is damaged, it does not affect the operation of the communication link corresponding to other drives.

3 is a block diagram of a connection between an interface integrated circuit for vehicle diagnostics/programming and a microprocessor and vehicle diagnostic/programming interface in accordance with the present invention. Interface integrated circuit 200 for vehicle diagnostics/programming is coupled to an external microprocessor 300 and an external vehicle diagnostic/programming interface 400. The vehicle diagnostic/programming interface 400 is coupled to an onboard diagnostic system for diagnostic/programming of the vehicle electronic control unit. In use, the microprocessor 300, the interface integrated circuit 200, and the vehicle diagnostic/programming interface 400 are coupled together to form a vehicle diagnostic channel, and the microprocessor 300 communicates with the onboard diagnostic system via the interface integrated circuit 200, the vehicle diagnostic/programming interface 400. Thus, the diagnostic data is read from the onboard diagnostic system or the parameter setting data is written to the vehicle electronic control unit via the vehicle diagnostic/programming interface 400.

The interface integrated circuit 200 may further include a digital logic control unit 230, a program voltage unit 240, an internal power supply unit 250, an analog-to-digital conversion sampling unit 260, and an over-temperature protection unit 270 in addition to the communication control unit 110 and the port drive unit 120. one or more.

Figure 4 shows in more detail the connections between the various units within the interface integrated circuit of Figure 3 and their connections to external microprocessors and automotive diagnostic/programming interfaces.

The digital logic control unit 230 includes a plurality of registers and corresponding logic controllers to control the various units within the entire interface integrated circuit. As shown in FIG. 4, the digital logic control unit 230 may be connected to the communication control unit 110 and the port driving unit 120 for configuring a plurality of communication protocol core modules of the communication control unit 110 and a plurality of drivers of the port driving unit 120. Collaborative styles for multiple drive modules. Digital logic control unit 230 can also be coupled to microprocessor 300 for processing the diagnostic control instructions in conjunction with microprocessor 300. The digital logic control unit 230 receives the diagnostic control commands from the microprocessor 300 and, after processing, controls the other units within the interface integrated circuit 200 accordingly.

The programming voltage unit 240 is used to generate the operating voltage required to program the vehicle electronic control unit. The programming voltage unit 240 includes: a voltage adjustable low dropout linear regulator (LD0), a voltage divider coupled to the LD0, and a logic controller. The microprocessor 300 controls the LD0 in the programming voltage unit 240 to generate the programming voltage required for programming the vehicle ECU by issuing control commands to the digital logic control unit 230. The programming voltage unit 240 has the characteristics of fast output response, stable output, strong driving capability, low noise, etc., and can provide programming voltage for ECU programming of most vehicles on the market.

The internal power supply unit 250 is used to generate the voltage required for the interface integrated circuit 200 to operate. The internal power supply unit 250 includes: three low dropout linear regulators LD0, one DC-DC (DC-DC) switching power supply. The internal power supply unit 250 is used to provide the power supply voltage required for operation of the interface integrated circuit 200, which may be powered by an external battery or power adapter, or by the vehicle via the vehicle diagnostic/programming interface 400 (eg, DC +4 V to DC +40 V) ) and can support heavy trucks. After processing by the LD0 and the DC-DC switching power supply, the required operating voltage is provided for normal operation of other cells within the interface integrated circuit 200. Since the internal power supply of the interface integrated circuit 200 is adopted, the peripheral power processing portion is reduced, so that the volume and weight of the final product are greatly reduced, and the portability is improved.

The analog to digital conversion sampling unit 260 is for sampling and converting an analog signal characterizing the condition of the vehicle from the onboard diagnostic system via the vehicle diagnostic/programming interface to a digital signal. Analog to Digital Conversion Sampling Unit 260 includes a reference voltage source for sampling the reference reference, an analog to digital converter

(eg 10 b i t analog to digital converter), and multiple channel switchers. The reference voltage source can select either the internal voltage as a reference or the external voltage as a reference. By switching the switch, time-division sampling and digital output of multiple analog input signals can be realized. The analog to digital conversion sampling unit 260 is connected to the digital logic control unit 230 and the communication control unit 110.

The over-temperature protection unit 270 is for detecting the temperature of the interface integrated circuit 200, and when detecting that the temperature of the interface integrated circuit 200 exceeds the threshold value, issues a signal indicating that the whole of the interface integrated circuit 200 or other units therein is stopped. The overtemperature protection unit 270 includes a temperature sensor and a port short circuit detection circuit. The over temperature protection unit is connected to the digital logic control unit 230. Once the over temperature protection unit 270 detects that the temperature of the interface integrated circuit 200 is too high, the situation is reported to the digital logic control unit 230, and the digital logic control unit 230 determines whether to close other units of the interface integrated circuit 200 according to the reported data. Avoid damage to the interface integrated circuit 200.

Preferably, the present invention also provides a vehicle diagnostic apparatus including the above-described interface integrated circuit for vehicle diagnosis/programming.

Further, preferably, although not shown, the present invention also provides a corresponding communication method for data communication between the microprocessor and the on-board diagnostic system through the communication control unit and the port drive unit. The communication control unit includes a plurality of communication protocol core modules, each communication protocol core module receives and transmits data according to a communication protocol, and each communication protocol core module can acquire in a vehicle condition inquiry and parameter setting mode, and a vehicle condition Switching between modes; the port driving unit includes a plurality of drivers, among the plurality of drivers Each of the drivers includes a plurality of drive modules, and each of the plurality of drive modules is correspondingly coupled to a respective one of the plurality of communication protocol core modules of the communication control unit. The communication method is characterized in that in the vehicle condition inquiry and parameter setting mode,

(1) each communication protocol core module in the communication control unit receives a vehicle condition inquiry signal and/or a parameter setting signal from the microprocessor that conforms to the corresponding communication protocol, and converts it into a receiving for the correspondingly connected driving module. Vehicle condition inquiry signal and/or parameter setting signal, and then sent to the correspondingly connected driving module;

In the vehicle condition acquisition mode,

Preferably, the present invention further provides a communication system for vehicle diagnosis, comprising: a microprocessor;

The above interface integrated circuit is connected between the microprocessor and the vehicle diagnostic/programming interface to perform between the microprocessor and the onboard diagnostic system according to the communication method described above data communication.

Although the invention has been exemplified above in connection with the specific embodiments, it should be appreciated that the invention is not limited thereto. The present invention can be variously modified without departing from the spirit and scope of the invention.

Claims

Claim

1. An interface integrated circuit for vehicle diagnostics/programming, the interface integrated circuit being connected between an external microprocessor and an external vehicle diagnostic/programming interface, the vehicle diagnostic/programming interface being further connected To the onboard diagnostic system for diagnostic/programming of the vehicle electronic control unit, characterized in that the interface integrated circuit comprises:

a port driving unit, the port driving unit includes a plurality of drivers, each of the plurality of drivers includes a plurality of driving modules, and each of the plurality of driving modules is correspondingly connected to the communication control unit Corresponding multiple communication protocol core modules;

For the port driving unit, in the vehicle condition inquiry and parameter setting mode, each driving module receives a vehicle condition inquiry signal or a parameter setting signal from a correspondingly connected communication protocol core module that conforms to a corresponding communication protocol, and the vehicle is The signal level of the status inquiry signal or the parameter setting signal is converted into a signal level suitable for processing by the onboard diagnostic system, and the converted vehicle condition inquiry signal or parameter setting signal is transmitted to the onboard diagnostic system via the vehicle diagnostic/programming interface. In the vehicle condition acquisition mode, each of the drive modules receives a vehicle condition characterization signal from the onboard diagnostic system via the vehicle diagnostic/programming interface, converting the signal level of the vehicle condition characterization signal to a communication protocol suitable for being correspondingly connected The core module and the signal level processed by the microprocessor, and will pass The converted vehicle condition characterization signal is sent to a correspondingly connected communication protocol core module.

2. The interface integrated circuit for vehicle diagnostics/programming according to claim 1, wherein the plurality of communication protocol core modules of the communication control unit comprise

Two or more of HSCAN core module, SWCAN core module, LSCAN core module, 708 708 core module, J1850-PWM core module, J1850-VPW core module, KSCI core module and KN core module, correspondingly, the port The plurality of drive modules of each driver of the drive unit include an HSCAN drive module, a SWCAN drive module, an LSCAN drive module, a 708 708 drive module, a J1850-PWM drive module, a J1850-VPW drive module, a K/SCI drive module, and a KN drive. Two or more of the modules.

3. The interface integrated circuit for vehicle diagnostics/programming according to claim 1, further comprising a digital logic control unit, the digital logic control unit being coupled to the communication control unit and the port drive unit, And configuring a cooperative mode of the plurality of communication protocol core modules of the communication control unit and the plurality of drive modules of the plurality of drivers of the port drive unit.

4. The interface integrated circuit for vehicle diagnostics/programming according to claim 3, further comprising a programming voltage unit coupled to the digital logic control unit for generating electronic control of the vehicle The operating voltage required for the unit to be programmed.

5. The interface integrated circuit for vehicle diagnostics/programming according to claim 1, further comprising an internal power supply unit coupled to each unit inside the interface integrated circuit to generate the vehicle for use The voltage required for the diagnostic/programmed interface IC to operate.

6. The interface integrated circuit for vehicle diagnostics/programming according to claim 3, further comprising an analog to digital conversion sampling unit, the analog to digital conversion sampling unit and the digital logic control unit, and the communication control Unit connected to be diagnosed/programmed via vehicle The interface is sampled and converted to a digital signal from an onboard diagnostic system that characterizes the condition of the vehicle.

7. The interface integrated circuit for vehicle diagnostics/programming according to claim 3, further comprising an over temperature protection unit connected to the digital logic control unit to detect the The temperature of the interface integrated circuit of the vehicle diagnostic/programming, and when detecting that the temperature of the interface integrated circuit for vehicle diagnostic/programming exceeds a threshold, issues an interface integrated circuit for the vehicle diagnostic/programming as a whole or an internal thereof The other unit stops signaling.

A vehicle diagnostic apparatus, comprising an interface integrated circuit for vehicle diagnosis/programming according to any one of claims 1 to 7.

9. A communication method for communicating data between a microprocessor and an onboard diagnostic system via a communication control unit and a port drive unit, wherein the communication control unit comprises a plurality of communication protocol core modules, each Communication protocol core modules receive and transmit data according to a communication protocol, and each communication protocol core module is switchable between a vehicle condition inquiry and parameter setting mode, and a vehicle condition acquisition mode; the port driving unit includes a plurality of drivers Each of the plurality of drivers includes a plurality of drive modules, and each of the plurality of drive modules is respectively connected to a corresponding one of the plurality of communication protocol core modules of the communication control unit; the communication method Characterized by

In the vehicle status inquiry and parameter setting mode,

(2) each driving module receives a vehicle condition inquiry signal or a parameter setting signal corresponding to a corresponding communication protocol from a correspondingly connected communication protocol core module, and converts a signal level of the vehicle condition inquiry signal or the parameter setting signal into a suitable one. The signal level processed by the onboard diagnostic system, and the converted vehicle condition inquiry signal or parameter setting The signal is sent to the onboard diagnostic system via the vehicle diagnostic/programming interface;

In the vehicle condition acquisition mode,

10. A communication system for vehicle diagnostic/programming, comprising: a microprocessor;

An interface integrated circuit for vehicle diagnostic/programming according to any one of claims 1 to 7, the interface integrated circuit being connected between the microprocessor and the vehicle diagnostic/programming interface to Data communication between the microprocessor and the onboard diagnostic system.