CN111806341A - Isolated form car atmosphere lamp controller based on CAN communication - Google Patents
Isolated form car atmosphere lamp controller based on CAN communication Download PDFInfo
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- CN111806341A CN111806341A CN202010623434.2A CN202010623434A CN111806341A CN 111806341 A CN111806341 A CN 111806341A CN 202010623434 A CN202010623434 A CN 202010623434A CN 111806341 A CN111806341 A CN 111806341A
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- 238000004891 communication Methods 0.000 title claims abstract description 31
- 238000002955 isolation Methods 0.000 claims description 55
- 230000008878 coupling Effects 0.000 claims description 36
- 238000010168 coupling process Methods 0.000 claims description 36
- 238000005859 coupling reaction Methods 0.000 claims description 36
- 230000001052 transient effect Effects 0.000 claims description 10
- 230000001629 suppression Effects 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 7
- 230000007958 sleep Effects 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 abstract description 4
- 230000001953 sensory effect Effects 0.000 abstract description 3
- 238000005286 illumination Methods 0.000 abstract description 2
- 230000003993 interaction Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000033228 biological regulation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005693 optoelectronics Effects 0.000 description 3
- 102100039435 C-X-C motif chemokine 17 Human genes 0.000 description 2
- 101000889048 Homo sapiens C-X-C motif chemokine 17 Proteins 0.000 description 2
- 230000005059 dormancy Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q3/00—Arrangement of lighting devices for vehicle interiors; Lighting devices specially adapted for vehicle interiors
- B60Q3/80—Circuits; Control arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
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Abstract
The invention relates to the technical field of automobile functional lighting control, in particular to an isolated automobile atmosphere lamp controller based on CAN communication, which comprises an external interface unit, an isolated power supply unit, an LIN drive circuit unit, a CAN drive circuit unit, a central controller unit and an atmosphere lamp power supply unit, wherein the external interface unit is respectively connected with the atmosphere lamp power supply unit, the LIN drive circuit unit, the isolated power supply unit and the CAN drive circuit unit; the invention can realize the illumination logic control of the automobile interior lamp, can meet various sensory requirements of passengers in different environments, enables the passengers to obtain special visual effects in the automobile, and creates unique automobile interior experience.
Description
Technical Field
The invention relates to the technical field of automobile functional lighting control, in particular to an isolated automobile atmosphere lamp controller based on CAN communication, which needs to realize the lighting logic control function of an automobile interior lamp, CAN meet various sensory requirements of passengers in different environments, enables the passengers to obtain special visual effects in or out of an automobile, enhances the surrounding sense of ambient light and creates unique automobile interior experience.
Background
With the continuous deepening of the technical cooperation among automobile manufacturers all over the world, the quality difference of automobiles produced by the automobile manufacturers in all countries in the world is smaller and smaller, the quality is no longer the main difference of automobile manufacture, the automobile interior decoration configuration, especially the lighting function of the atmosphere lamp in the automobile, is gradually the key factor influencing the automobile purchase of consumers, and passengers hope to obtain the relaxed interior lighting in the automobile and meet various sensory requirements under different environments.
Most of automobile atmosphere lamp controllers in early markets adopt an independent control mode, control logic is simple, and the automobile atmosphere lamp controllers have no information interaction function with an original automobile; the atmosphere lamp controller that the later stage appears is mutual through wireless bluetooth transmission mode and former car information, need additionally install bluetooth communication equipment on former car diagnosis interface, can appear communicating unsuccessful influence atmosphere lamp logic control effect, perhaps disturb the information interaction between other equipment of former car. Therefore, a new car atmosphere lamp controller is needed, which can be directly embedded into an original car, can perform information interaction with the original car without additionally adding equipment, does not affect the information interaction function of the original car after communication abnormality or the controller is damaged, does not need to be independently powered and has an energy-saving dormancy function, can realize the drive control of lighting in different cars in different environments, and enables passengers to obtain a special visual effect in the car.
Disclosure of Invention
The invention aims to provide an isolated automobile atmosphere lamp controller based on CAN communication, which aims to solve the problems of low compatibility with an original automobile, unstable information interaction, poor user experience effect and the like in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the isolated automobile atmosphere lamp controller based on CAN communication comprises an external interface unit, an isolation power supply unit, an LIN drive circuit unit, a CAN drive circuit unit, a central controller unit and an atmosphere lamp power supply unit, wherein the external interface unit is respectively connected with the atmosphere lamp power supply unit, the LIN drive circuit unit, the isolation power supply unit and the CAN drive circuit unit, the isolation power supply unit is respectively connected with the LIN drive circuit unit, the central controller unit and the CAN drive circuit unit, and the central controller unit is respectively connected with the LIN drive circuit unit, the CAN drive circuit unit and the atmosphere lamp power supply unit.
Preferably, keep apart the power supply unit and include power chip, keep apart power module, optoelectronic coupling device and constitute, power chip's input is through parallel capacitance, series connection diode connection external interface unit, and power chip's output passes through parallel capacitance connection isolation power module's input, keep apart power module's output and provide the power for central controller unit module, optoelectronic coupling device's input passes through the control signal output of series resistance connection central controller unit, and optoelectronic coupling device's output passes through the enable control end of series connection diode and resistance connection power chip, and CAN drive circuit unit's signal output part is through the enable control end of series connection diode and resistance connection power chip.
Preferably, the power supply chip is a power supply regulation chip NCV42665 with an enabling function, the isolated power supply module is of a model of WRB0503S, and outputs 3.3V isolated power supply voltage, and the photoelectric coupling device is a high-speed optical coupling device PC817 for isolation of control signals.
Preferably, the LIN drive circuit unit comprises an isolation chip, an LIN drive chip and a photoelectric coupler, wherein the input end of the isolation chip is connected with the serial signal communication end of the central controller unit, the output end of the isolation chip is connected with the serial signal communication end of the LIN drive chip, the control signal output end of the central controller unit is connected with the input end of the photoelectric coupler through a series resistor, the output end of the photoelectric coupler is connected with the control signal input end of the LIN drive chip, the output end of the LIN drive chip is connected with the external interface unit through a series resistor, a parallel TVS transient suppression diode and a pull-up resistor, and the sleep control end of the LIN drive chip is connected to a power supply voltage through a resistor.
Preferably, the LIN driving chip is of a model number TJA1021, the isolation chip is an ADuM1201 with a double-path isolation channel, and the photoelectric coupler is a high-speed photoelectric coupler PC817 for signal isolation.
Preferably, the CAN driving circuit unit comprises an isolation chip, a CAN driving chip and a photoelectric coupler, the input end of the isolation chip is connected with the CAN signal communication end of the central controller unit, the output end of the isolation chip is connected with the signal input end of the CAN driving chip, one path of control signal of the central controller unit is connected with the input end of the photoelectric coupler through a series resistor, the output end of the photoelectric coupler is connected with the enable control end of the CAN driving chip, the working signal output end of the CAN driving chip is connected with the power isolation unit, the other path of control signal of the central controller unit is connected with the input end of the photoelectric coupler through a series circuit, the output end of the photoelectric coupler is connected with the setting end of the CAN driving chip, the CAN signal output end of the CAN driving chip is connected with the common mode choke coil and the transient suppression diode and is finally connected to the, the wake-up end of the CAN driving chip is connected to a power supply voltage through a pull-up resistor.
Preferably, the model of the CAN driving chip is TJA1043 with low power consumption and a sleep function, the isolation chip is ADuM1201 with a double-path isolation channel, and the photoelectric coupler is a high-speed optical coupler PC817 for signal isolation.
Preferably, the atmosphere lamp power supply unit comprises a power switch chip and a photoelectric coupling device. The grounding end of the power switch chip is grounded through a resistor and a parallel diode, two paths of control signals of the central controller unit are respectively connected with the input end of a photoelectric coupling device through a series resistor, the output ends of the two paths of photoelectric coupling devices are connected with the control signal input end of the power switch chip, the other path of control signal of the central controller unit is connected with the input end of the photoelectric coupling device through the series resistor, the output end of the photoelectric coupling device is connected with the output end of the power switch chip after being connected with the double diodes and the resistor in series, and the output end of the power switch chip is connected with an external interface unit.
Preferably, the power switch chip is a BTS5045 suitable for severe automotive environment applications, and the photoelectric coupling device is a high-speed optical coupling device PC817 for signal isolation.
Preferably, the central controller unit comprises a microcontroller and an SWD interface, a serial port signal end of the microcontroller is connected with an LIN drive circuit unit, a CAN signal end is connected with a CAN drive circuit unit, a control signal output end is respectively connected with an atmosphere lamp power supply unit, the LIN drive circuit unit and the CAN drive circuit unit, the SWD interface is connected with a program downloading end of the microcontroller, and the microcontroller chip is LPC11C14 in model number.
Advantageous effects
Compared with the prior art, the isolated automobile atmosphere lamp controller based on CAN communication provided by the invention has the following beneficial effects:
(1) isolated form car atmosphere lamp controller based on CAN communication mainly comprises external interface unit, isolation power supply unit, LIN drive circuit unit, CAN drive circuit unit, central controller unit and atmosphere lamp power supply unit, and the atmosphere lamp controller carries out the information interaction through external interface unit and former car and atmosphere lamp module, realizes the control function to the atmosphere lamp module.
(2) The CAN signal end and the serial port signal end of the central controller unit are isolated from the outside by using a double-channel digital isolation device ADuM1201 chip, and the control signals of the central controller unit are isolated by using a high-speed optocoupler chip PC817, so that the mutual interference among all unit modules is effectively reduced, and the stability is improved.
(3) The original vehicle end voltage VCC1 is isolated from the central controller unit voltage VCC by an isolation power supply module WRB0503S, and the two ends of the isolation chip are respectively supplied with power by voltages VCC1 and VCC, so that the isolation between the original vehicle end voltage and the central controller unit voltage is achieved, the crosstalk between the voltages is reduced, and the stability of both-side communication is improved.
(4) The external connecting end of the LIN driving circuit unit and the external connecting end of the CAN driving circuit unit use TVS transient suppression diode protection devices to avoid instant spike pulse and overload and protect the atmosphere lamp controller and the original vehicle module from being damaged.
(5) According to the technical scheme, the isolated atmosphere lamp controller based on CAN communication CAN be directly embedded into an original vehicle, the information interaction function of the original vehicle is not affected after communication abnormity occurs or the controller is damaged, the isolated atmosphere lamp controller has an energy-saving dormancy function, information interaction CAN be carried out with the original vehicle without additionally adding equipment, driving control of illumination in different vehicles CAN be achieved in different environments, and passengers CAN obtain special visual effects in the vehicles.
Drawings
Fig. 1 is a block diagram showing the overall structure of the present invention.
FIG. 2 is a schematic diagram of the isolated power supply unit connection of the present invention.
Fig. 3 is a schematic diagram of the connection of the LIN driver circuit unit in the present invention.
Fig. 4 is a schematic diagram of the connection of the CAN driving circuit unit in the present invention.
FIG. 5 is a schematic diagram of the power supply unit of the atmosphere lamp of the present invention.
Fig. 6 is a schematic diagram of the connection of the central controller unit of the present invention.
FIG. 7 is a general flow chart of the system software in the invention.
In the figure: 1. an external interface unit; 2. an isolated power supply unit; 3. a central controller unit; 4. a CAN drive circuit unit; 5. an atmosphere lamp power supply unit; 6. the LIN drives the circuit unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Various modifications and improvements of the technical solutions of the present invention may be made by those skilled in the art without departing from the design concept of the present invention, and all of them should fall into the protection scope of the present invention.
As shown in fig. 1, the present invention provides a technical solution: an isolated automobile atmosphere lamp controller based on CAN communication comprises an external interface unit 1, an isolated power supply unit 2, an LIN drive circuit unit 6, a CAN drive circuit unit 4, a central controller unit 3 and an atmosphere lamp power supply unit 5, wherein the external interface unit 1 is respectively connected with the atmosphere lamp power supply unit 5, the LIN drive circuit unit 6, the isolated power supply unit 2 and the CAN drive circuit unit 4, the isolated power supply unit 2 is respectively connected with the LIN drive circuit unit 6, the central controller unit 3 and the CAN drive circuit unit 4, and the central controller unit 3 is respectively connected with the LIN drive circuit unit 6, the CAN drive circuit unit 4 and the atmosphere lamp power supply unit 5.
As shown in fig. 2, the isolated power supply unit 2 mainly includes a power supply regulating chip U7, a power supply isolating module U8, a photocoupler E7, and a basic electronic component. U7 is a power supply regulation chip NCV42665 with an enabling function, and the power supply regulation chip is used for reducing the vehicle-mounted 12V voltage to 5V output voltage for other module units. The isolation power supply module U8 is WRB0503S, and is used for reducing the voltage of 5V output by U7 and isolating and outputting the voltage of 3.3V for the central controller unit to use, thereby realizing power supply isolation with other unit modules. The photoelectric coupler E7 is PC817, and isolates the output signal of the central controller unit from the enable pin of the power supply regulating chip U7. The basic electronic components comprise a resistor, a capacitor and a diode, wherein the diode and related components are used for realizing the enabling control of the central controller unit and the CAN driving circuit unit on the power supply regulating chip U7 and realizing the awakening function of the controller power supply in the sleep state.
As shown in fig. 3, the LIN driver circuit unit 6 mainly includes an isolation chip U3, an LIN driver chip U2, a photocoupler E1, and a basic electronic component. U3 is an isolation chip ADuM1201, and has an isolation input and output channel, respectively, to isolate the output or input signal of the central controller unit from the input or output signal of the LIN driver circuit unit, thereby reducing the signal interference between unit modules. U2 is a LIN driver chip TJA1021, and is used for converting the output signal of the central controller unit, which is isolated and output by the isolation chip U3, into a LIN protocol standard level to communicate with external LIN protocol devices, so as to implement the functions of receiving and transmitting LIN data. The photoelectric coupler E1 is PC817, and controls the isolation between the output signal of the central controller unit and the LIN drive chip U2, and switches the working state of the LIN drive chip U2. The basic electronic components include a capacitor, a resistor, a diode, and a TVS transient suppression diode F1 for protecting the LIN driver circuit unit 6 from damage caused by external transient spike impact.
As shown in fig. 4, the CAN driving circuit unit 4 mainly includes an isolation chip U5, a CAN driving chip U4, photocouplers E2 and E3, a common mode choke L1, and a basic electronic component. The isolation chip U3 has the chip model of ADuM1201, and CAN input and output signals of the central controller unit are isolated from the CAN drive circuit unit, so that signal interference among unit modules is reduced, and the signal transmission stability is improved. The CAN driving chip U4 is TJA1043, has low power consumption and sleep function, and is used for converting CAN signals of the central controller unit into standard CAN protocol level and carrying out data communication with external CAN protocol equipment. The photoelectric coupling devices E2 and E3 are PC817 high-speed photoelectric coupling devices, isolate output control signals of the central controller unit, and are used for enabling and controlling the working state of the CAN drive chip U4. The basic electronic component comprises a resistor, a capacitor and TVS transient suppression diodes F2 and F3, wherein the TVS transient suppression diodes are used for preventing the damage of external transient spike voltage to the driving chip and protecting the driving circuit.
As shown in fig. 5, the atmosphere lamp power supply unit 5 mainly includes a power switch chip U6, photocouplers E4, E5, E6, and basic electronic components. The power switch chip U6 is BTS5045 suitable for severe automobile environment application, and the photoelectric coupling devices E4, E5 and E6 are PC817 high-speed photoelectric coupling devices, and are used for isolating control signals at two ends of a central controller unit and an atmosphere lamp power supply unit. The base electronic components include resistor, capacitor and diode devices.
As shown in fig. 6, the central controller unit 3 is mainly composed of a microcontroller U1, an SWD download interface and its basic electronic components. The model of the micro-control U1 chip is LPC11C14, and an SWD downloading interface is mainly used for program downloading and debugging of the micro-controller. The basic electronic components comprise resistors, capacitors, light emitting diodes and crystal oscillators, and form a central controller unit with a work indication function.
As shown in fig. 7, the overall design flow chart of the software system mainly includes two parts, wherein the first part is an initialization function of the relevant code, including initialization operations of the timer, the CAN module, the LIN module, and the like, and the second part is a main program loop part divided into four scanning periods. The 10ms scanning period is used for function codes with high real-time requirements, such as quick response to commands sent by BCM of an original vehicle; the 20ms scanning period is used for responding and processing 0x660 and 0x4A0 information sent by the BCM of the original vehicle; the 100ms scanning period is used for controlling the turn-on or turn-off time of the atmosphere lamp; the 1s scan cycle is used for CAN status information, such as the status information of the ambience lamp, sent by the ambience lamp controller to the BCM module of the original vehicle.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an isolated form car atmosphere lamp controller based on CAN communication which characterized in that: the atmosphere lamp isolation device is characterized by comprising an external interface unit, an isolation power supply unit, an LIN drive circuit unit, a CAN drive circuit unit, a central controller unit and an atmosphere lamp power supply unit, wherein the external interface unit is respectively connected with the atmosphere lamp power supply unit, the LIN drive circuit unit, the isolation power supply unit and the CAN drive circuit unit, the isolation power supply unit is respectively connected with the LIN drive circuit unit, the central controller unit and the CAN drive circuit unit, and the central controller unit is respectively connected with the LIN drive circuit unit, the CAN drive circuit unit and the atmosphere lamp power supply unit.
2. The isolated automotive ambience lamp controller based on CAN communication of claim 1, wherein: the isolation power supply unit comprises a power supply chip, an isolation power supply module and a photoelectric coupling device, wherein the input end of the power supply chip is connected with an external interface unit through a parallel capacitor and a series diode, the output end of the power supply chip is connected with the input end of the isolation power supply module through the parallel capacitor, the output end of the isolation power supply module provides power for the central controller unit module, the input end of the photoelectric coupling device is connected with the control signal output end of the central controller unit through a series resistor, the output end of the photoelectric coupling device is connected with the enabling control end of the power supply chip through the series diode and a resistor, and the signal output end of the CAN driving circuit unit is connected with the enabling control end of the power supply chip through the series diode and the.
3. The isolated automotive ambience lamp controller based on CAN communication of claim 2, wherein: the power supply chip is a power supply regulating chip NCV42665 with an enabling function, the isolated power supply module is WRB0503S in model and outputs 3.3V isolated power supply voltage, and the photoelectric coupling device is a high-speed photoelectric coupling device PC817 and is used for isolating control signals.
4. The isolated automotive ambience lamp controller based on CAN communication of claim 1, wherein: the LIN driving circuit unit comprises an isolation chip, an LIN driving chip and a photoelectric coupling device, wherein the input end of the isolation chip is connected with a serial port signal communication end of the central controller unit, the output end of the isolation chip is connected with the serial port signal communication end of the LIN driving chip, the control signal output end of the central controller unit is connected with the input end of the photoelectric coupling device through a series resistor, the output end of the photoelectric coupling device is connected with the control signal input end of the LIN driving chip, the output end of the LIN driving chip is connected with an external interface unit through a series resistor, a TVS transient suppression diode and a pull-up resistor in parallel, and the sleep control end of the LIN driving chip is connected to a.
5. The isolated automotive ambience lamp controller based on CAN communication according to claim 4, wherein: the LIN driving chip is TJA1021 in model, the isolation chip is ADuM1201 with a dual-channel isolation channel, and the photoelectric coupling device is a high-speed photoelectric coupling device PC817 for signal isolation.
6. The isolated automotive ambience lamp controller based on CAN communication of claim 1, wherein: the CAN driving circuit unit comprises an isolation chip, a CAN driving chip and a photoelectric coupler, the input end of the isolation chip is connected with the CAN signal communication end of the central controller unit, the output end of the isolation chip is connected with the signal input end of the CAN driving chip, one path of control signal of the central controller unit is connected with the input end of the photoelectric coupling device through the series resistor, the output end of the photoelectric coupling device is connected with the enabling control end of the CAN driving chip, the working signal output end of the CAN driving chip is connected with the power isolation unit, the other path of control signal of the central controller unit is connected with the input end of the photoelectric coupling device through the series circuit, the output end of the photoelectric coupling device is connected with the setting end of the CAN driving chip, the CAN signal output end of the CAN driving chip is connected with the common mode choke coil and the transient suppression diode and is finally connected to the external interface unit, and the awakening end of the.
7. The isolated automotive ambience lamp controller based on CAN communication according to claim 6, wherein: the CAN driving chip is TJA1043 with low power consumption and a sleep function, the isolation chip is ADuM1201 with a double-path isolation channel, and the photoelectric coupling device is a high-speed photoelectric coupling device PC817 for signal isolation.
8. The isolated automotive ambience lamp controller based on CAN communication of claim 1, wherein: the atmosphere lamp power supply unit comprises a power switch chip and a photoelectric coupler. The grounding end of the power switch chip is grounded through a resistor and a parallel diode, two paths of control signals of the central controller unit are respectively connected with the input end of a photoelectric coupling device through a series resistor, the output ends of the two paths of photoelectric coupling devices are connected with the control signal input end of the power switch chip, the other path of control signal of the central controller unit is connected with the input end of the photoelectric coupling device through the series resistor, the output end of the photoelectric coupling device is connected with the output end of the power switch chip after being connected with the double diodes and the resistor in series, and the output end of the power switch chip is connected with an external interface unit.
9. The isolated automotive ambience lamp controller based on CAN communication of claim 8, wherein: the power switch chip is BTS5045 suitable for severe automobile environment application, and the photoelectric coupler is a high-speed optical coupler PC817 for controlling signal isolation.
10. The isolated automotive ambience lamp controller based on CAN communication of claim 1, wherein: the central controller unit comprises a microcontroller and an SWD interface, a serial port signal end of the microcontroller is connected with an LIN drive circuit unit, a CAN signal end is connected with a CAN drive circuit unit, a control signal output end is respectively connected with an atmosphere lamp power supply unit, the LIN drive circuit unit and the CAN drive circuit unit, the SWD interface is connected with a program downloading end of the microcontroller, and the microcontroller chip model is LPC11C 14.
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| CN202010623434.2A CN111806341A (en) | 2020-06-22 | 2020-06-22 | Isolated form car atmosphere lamp controller based on CAN communication |
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| CN202010623434.2A CN111806341A (en) | 2020-06-22 | 2020-06-22 | Isolated form car atmosphere lamp controller based on CAN communication |
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| CN112485939A (en) * | 2020-12-04 | 2021-03-12 | 深圳市瀚达美电子有限公司 | Integrated vehicle-mounted display with atmosphere lamp module |
| CN113696842A (en) * | 2021-08-18 | 2021-11-26 | 远峰科技股份有限公司 | Vehicle-mounted multimedia display power supply and transmission control system |
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Application publication date: 20201023 |