Communication transceiving device based on CXPI protocol

Abstract

The utility model provides a communication transceiver based on a CXPI protocol, which comprises a power supply module, a central processing unit and a CXPI communication module, the central processing unit comprises a chip IC5, and the CXPI communication module comprises a chip IC6; the model number of the chip IC5 is ESP32-WROOM-32Ede, and the model number of the chip IC6 is BD41000AFJ-C. According to external vehicle signals and input of keys, the CXPI bus communication device can communicate with a CXPI bus of a cab, transmit-receive of CXPI signals is achieved, and communication and control among components of the cab needed in vehicle-mounted machine authentication are achieved. The problems that in an authentication experiment, professionals cannot operate on site, and the cost of a CXPI signal suite is high are solved, and the integrated module adopted by the design is low in cost, good in effect, simple in structure and convenient to maintain.

Description

TECHNICAL FIELD

[0001] The utility model belongs to vehicle control technical field especially, it is a kind of communication transceiver based on CXPI protocol. BACKGROUND

[0002] Clock Extension Peripheral Interface) protocol.CXPI protocol is used to connect steering wheel switch, lighting switch, door lock, door mirror and other equipment, to realize the communication and control between these vehicle body components.For example, when the driver operates the key on the steering wheel, BODY ECU can be converted into CXPI signal to be transmitted to the corresponding control unit quickly and accurately, to realize volume adjustment, cruise control and other functions.CXPI protocol aims to reduce the amount of HMI (human-machine interface) device wiring, helps to reduce the weight of vehicle body, provides a multi-transmission in-vehicle communication method for the establishment of next-generation vehicle sub-network.

[0003] In the process of vehicle authentication, complete components of the driver cabin environment need to be prepared, such as BODY ECU, MET ECU, instrument, etc.The communication of each component in the driver cabin is realized through CXPI protocol communication.Because authentication needs to be obtained in the same state as the vehicle, it is difficult to purchase BODY ECU equipment due to its diversity, because the function instructions of the steering wheel are different for different vehicle models, the product needs to purchase a matching CXPI generator, and the device is diverse, which increases the cost. UTILITY MODEL CONTENTS

[0004] In view of the problems in the prior art, the utility model provides a communication transceiver based on CXPI protocol, which directly accesses the CXPI bus of R authentication bench, simulates the reception and transmission of various CXPI signals required in the driver cabin, and aims to solve the problem that CXPI suite cannot be operated, CXPI signals cannot be received and transmitted, and each component in the driver cabin required for authentication cannot be controlled in the process of vehicle authentication with low cost.The technical scheme is as follows:

[0005] A communication transceiver based on CXPI protocol includes a power module, a central processor and a CXPI communication module, the central processor includes chip IC5, and the CXPI communication module includes chip IC6; the model of chip IC5 is ESP32-WROOM-32Ede, and the model of chip IC6 is BD41000AFJ-C;

[0006] The power module includes chip IC7 and chip IC8, the model of chip IC7 is BP5293-50, and the model of chip IC8 is BP5293-33;

[0007] The 1st port of the chip IC7 and the 1st port of the chip IC8 are connected with the 1st port of the connector CN2 respectively; the 2nd port of the chip IC7 is connected with the 19th port of the chip IC5 and the 10th port of the chip IC6 respectively; the 2nd port of the chip IC8 is connected with the 7th port of the chip IC6;

[0008] The 18th port of the chip IC6 is also connected with the 1st port of the connector CN2;

[0009] The 3rd port of the chip IC5 is connected with the 4th port of the connector CN2, and the 4th port of the chip IC5 is connected with the 5th port of the connector CN2;

[0010] The 17th port of the chip IC6 is connected with the 3rd port of the connector CN2;

[0011] The 37th port of the chip IC5 is connected with the 13th port of the chip IC6, the 36th port of the chip IC5 is connected with the 14th port of the chip IC6; the 7th port of the chip IC5 is connected with the 3rd port of the chip IC6; the 10th port of the chip IC5 is connected with the 16th port of the chip IC6.

[0012] Further, the 3rd port of the chip IC7 and the 3rd port of the chip IC8 are connected with the digital ground DGND respectively.

[0013] Further, the 14th port, the 38th port and the 32nd port of the chip IC5 are connected with the digital ground DGND respectively.

[0014] Further, the 19th port of the chip IC5 is also connected in parallel with the capacitors C1 and C2 between the digital ground DGND.

[0015] Further, the 8th port, the 9th port and the 19th port of the chip IC6 are connected with the digital ground DGND respectively.

[0016] Further, the 1st port of the chip IC7 is connected in series with the capacitor C3 between the digital ground DGND.

[0017] Further, the 2nd port of the chip IC7 is connected in series with the capacitor C6 between the digital ground DGND.

[0018] Further, the 1st port of the chip IC8 is connected in series with the capacitor C7 between the digital ground DGND.

[0019] Further, the 2nd port of the chip IC8 is connected in series with the capacitor C8 between the digital ground DGND.

[0020] Further, the 2nd port of the connector CN2 is connected with the digital ground DGND.

[0021] The utility model discloses a communication with the CXPI bus of the driver cabin can be according to the input of external vehicle signal and button, realize the transceiving of CXPI signal, realize the communication and control between each component of the driver cabin required in the authentication of vehicle-mounted machine. The professional person in the authentication experiment cannot operate on the spot, and the CXPI signal kit cost is higher, and the integrated module cost of the design adopted is lower, and the effect is better, and the structure is simple, and the maintenance is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings that form part of the utility model are used to provide further understanding of the utility model, and the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute improper limitation to the utility model, and other related drawings can be obtained according to these drawings without the premise of creative labor for ordinary skilled person in the art.

[0023] Figure 1 It is the principle block diagram of the utility model;

[0024] Figure 2 It is the circuit diagram of the embodiment of the utility model. DETAILED DESCRIPTION

[0025] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0026] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0027] As Figure 1 The utility model discloses a power module, central processing unit and CXPI communication module, power module is connected with central processing unit and CXPI communication module respectively, and central processing unit is connected with CXPI communication module.

[0028] As Figure 2 The central processing unit includes chip IC5, and the CXPI communication module includes chip IC6;Considering the modularity, maintainability and compactness of the overall design, the chip IC5 of the utility model adopts the development board of model ESP32-WROOM-32Ede, and the chip IC6 is model BD41000AFJ-C.

[0029] The power module is responsible for providing 5V power supply and 3.3V power supply;Specifically, the power module includes chip IC7 and chip IC8, and the chip IC7 of the power module is responsible for outputting 5V power supply, and the chip IC8 of the power module is responsible for outputting 3.3V power supply;Further, the model of chip IC7 is BP5293-50;The model of chip IC8 is BP5293-33;

[0030] Further, the 1st port of the chip IC7 and the 1st port of the chip IC8 are connected with the 1st port of the connector CN2 respectively, the 3rd port of the chip IC7 and the 3rd port of the chip IC8 are connected with the digital ground DGND respectively; the 2nd port of the chip IC7 is connected with the 19th port of the chip IC5 and the 10th port of the chip IC6 respectively; the 2nd port of the chip IC8 is connected with the 7th port of the chip IC6.

[0031] The 18th port of the chip IC6 is also connected with the 1st port of the connector CN2 to obtain the analog vehicle BU power supply from outside. The chip IC7 and the chip IC8 obtain the analog vehicle BU power supply from outside through the 1st port of the connector CN1 as the input of power conversion, the 2nd port of the chip IC7 outputs the converted 5V, and the 2nd port of the chip IC8 outputs the converted 3.3V.

[0032] Further, the capacitor C3 is connected in series between the 1st port of the chip IC7 and the digital ground DGND, which constitutes the filter capacitor of the BU input of the chip IC7.

[0033] Further, the capacitor C6 is connected in series between the 2nd port of the chip IC7 and the digital ground DGND, which constitutes the filter capacitor of the 5V output of the chip IC7.

[0034] Further, the capacitor C7 is connected in series between the 1st port of the chip IC8 and the digital ground DGND, which constitutes the filter capacitor of the BU input of the chip IC8.

[0035] Further, the capacitor C8 is connected in series between the 2nd port of the chip IC8 and the digital ground DGND, which constitutes the filter capacitor of the 3.3V output of the chip IC8.

[0036] Further, the 2nd port of the connector CN2 is connected with the digital ground DGND.

[0037] The 3rd port (IO36) of the central processor chip IC5 is connected with the 4th port of the connector CN2, and the 4th port (IO39) of the chip IC5 is connected with the 5th port of the connector CN2, which are used to obtain the input of the external analog vehicle steering wheel button.

[0038] The 17th port of the CXPI communication module chip IC6 is connected with the 3rd port of the connector CN2 to perform the external CXPI communication.

[0039] UART communication is adopted between the central processor chip IC5 and the CXPI communication module chip IC6. Among them, the 37 port (TX1) of the chip IC5 is connected with the 13 port (RX) of the chip IC6, and the 36 port (RX1) of the chip IC5 is connected with the 14 port (TX) of the chip IC6; the 7 port (IO32) of the chip IC5 is connected with the 3 port (EN) of the chip IC6; and the 10 port (IO26) of the chip IC5 is connected with the 16 port (PWM) of the chip IC6, to provide PWM input for the CXPI signaling module.

[0040] Further, the 14 port, 38 port and 32 port of the chip IC5 are respectively connected with the digital ground DGND of the whole device for grounding.

[0041] Further, the capacitor C1 and C2 are also connected in parallel between the 19 port of the chip IC5 and the digital ground DGND, to form a filter circuit for 5V input of the chip IC5.

[0042] Further, the 8 port, 9 port and 19 port of the chip IC6 are respectively connected with the digital ground DGND of the whole device for grounding.

[0043] Working principle: The central processor chip IC5 (ESP32-WROOM-32E) obtains 5V and 3.3V from the chip IC7 (BP5293-50) and IC8 (BP5293-33) as power supply.

[0044] The GPIO36 (3 port) and GPIO39 (4 port) of the chip IC5 are respectively configured as two ADCs: ADC0 and ADC3, which are respectively connected with external 2 rows x 4 keys. Different keys are pressed, and the corresponding ADC pins receive corresponding voltages as the input of EPS32 and the input of BD41000AFJ-C, to realize mutual communication between the central processor module and the CXPI communication module.

[0045] The CXPI communication module chip IC6 (BD41000AFJ-C) obtains 5V power supply from BP5293-50 and 3.3V from BP5293-33 and BU power supply from external simulated vehicle power supply. The TX and RX pins (14 and 13 ports) of the chip IC6 perform UART communication with the corresponding pins of the chip IC5, the CXPI pin is connected to the vehicle CXPI bus, to realize the function of transmitting and receiving specified CXPI signals in the simulated cockpit environment.

[0046] The central processing unit receives the vehicle signal from the vehicle signal level conversion circuit and the key signal input from the external key through the pre-configured GPIO and ADC pins; specifically, the chip IC5 transmits the CXPI instruction content to the CXPI communication module chip IC6 according to the mapping relationship between the pre-compiled ADC signal and the external input signal through the configured UART pins: GPIO23 (configured as TX1), GPIO22 (configured as RX1), converts the UART signal into the CXPI signal via the module, and sends the signal to the CXPI bus in the driver's cabin environment through the BUS pin (17 port) of the communication module, thereby realizing the sending function of the CXPI signal. Similarly, the signal on the CXPI bus can also be input to the communication module through the TX1 pin and the RX1 pin of the communication module, and then transmitted to the central processing module via the UART channel, thereby realizing the receiving function of the CXPI signal.

[0047] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A communication transceiver device based on CXPI protocol, characterized in that, The power module, the central processing unit and the CXPI communication module are included, the central processing unit includes chip IC5, and the CXPI communication module includes chip IC6;Chip IC5 model is ESP32-WROOM-32Ede, and chip IC6 model is BD41000AFJ-C; The power module includes chip IC7 and chip IC8, chip IC7 model is BP5293-50;Chip IC8 model is BP5293-33; The 1 port of chip IC7, the 1 port of chip IC8 are connected with the 1 port of connector CN2 respectively;The 2 port of chip IC7 is connected with the 19 port of chip IC5 and the 10 port of chip IC6 respectively;The 2 port of chip IC8 is connected with the 7 port of chip IC6; The 18 port of chip IC6 is also connected with the 1 port of connector CN2; The 3 port of chip IC5 is connected with the 4 port of connector CN2, and the 4 port of chip IC5 is connected with the 5 port of connector CN2; The 17 port of chip IC6 is connected with the 3 port of connector CN2; The 37 port of chip IC5 is connected with the 13 port of chip IC6, and the 36 port of chip IC5 is connected with the 14 port of chip IC6;The 7 port of chip IC5 is connected with the 3 port of chip IC6;The 10 port of chip IC5 is connected with the 16 port of chip IC6.

2. The communication transceiver based on the CXPI protocol according to claim 1, wherein, The 3 port of chip IC7, the 3 port of chip IC8 are connected with digital ground DGND respectively.

3. The communication transceiver based on the CXPI protocol according to claim 1, wherein, The 14 port, 38 port, 32 port of chip IC5 are connected with digital ground DGND respectively.

4. The communication transceiver based on the CXPI protocol according to claim 1, wherein, The 19 port of chip IC5 is also connected with capacitor C1, C2 in parallel between digital ground DGND.

5. The communication transceiver based on CXPI protocol according to claim 1, wherein, The 8 port, 9 port and 19 port of chip IC6 are connected with digital ground DGND respectively.

6. The communication transceiver based on CXPI protocol according to claim 1, wherein, The 1 port of chip IC7 is connected with capacitor C3 in series between digital ground DGND.

7. The communication transceiver based on CXPI protocol according to claim 1, wherein, The 2 port of chip IC7 is connected with capacitor C6 in series between digital ground DGND.

8. The communication transceiver based on CXPI protocol according to claim 1, wherein, The 1 port of chip IC8 is connected with capacitor C7 in series between digital ground DGND.

9. The communication transceiver based on CXPI protocol according to claim 1, wherein, The 2 port of chip IC8 is connected with capacitor C8 in series between digital ground DGND.

10. The communication transceiver based on CXPI protocol according to claim 1, wherein, The 2 port of connector CN2 is connected with digital ground DGND.

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