CN105721658B - The vehicle audio and its working method for having automatic control and wireless communication function - Google Patents
The vehicle audio and its working method for having automatic control and wireless communication function Download PDFInfo
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- CN105721658B CN105721658B CN201610230595.9A CN201610230595A CN105721658B CN 105721658 B CN105721658 B CN 105721658B CN 201610230595 A CN201610230595 A CN 201610230595A CN 105721658 B CN105721658 B CN 105721658B
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- 238000004891 communication Methods 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000013078 crystal Substances 0.000 claims abstract description 44
- 238000001514 detection method Methods 0.000 claims abstract description 31
- 230000010355 oscillation Effects 0.000 claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims description 151
- 230000005669 field effect Effects 0.000 claims description 42
- 230000006870 function Effects 0.000 claims description 40
- 230000005611 electricity Effects 0.000 claims description 11
- 239000000523 sample Substances 0.000 claims description 9
- 230000003993 interaction Effects 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 claims description 3
- 235000013399 edible fruits Nutrition 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 13
- 230000009286 beneficial effect Effects 0.000 description 21
- 238000010586 diagram Methods 0.000 description 20
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- 230000003321 amplification Effects 0.000 description 1
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- 238000010304 firing Methods 0.000 description 1
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- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/60—Substation equipment, e.g. for use by subscribers including speech amplifiers
- H04M1/6033—Substation equipment, e.g. for use by subscribers including speech amplifiers for providing handsfree use or a loudspeaker mode in telephone sets
- H04M1/6041—Portable telephones adapted for handsfree use
- H04M1/6075—Portable telephones adapted for handsfree use adapted for handsfree use in a vehicle
- H04M1/6083—Portable telephones adapted for handsfree use adapted for handsfree use in a vehicle by interfacing with the vehicle audio system
- H04M1/6091—Portable telephones adapted for handsfree use adapted for handsfree use in a vehicle by interfacing with the vehicle audio system including a wireless interface
-
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only for telephonic receivers
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- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Multimedia (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Acoustics & Sound (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
The invention proposes a kind of vehicle audios and its working method for having automatic control and wireless communication function, comprising: MCU controller, Bluetooth circuit, microphone detection circuit, MCU clock crystal oscillator；The controller Bluetooth signal end MCU connects Bluetooth circuit signal end, and Bluetooth circuit microphone signal end connects microphone detection circuit signal end, and the controller crystal oscillation signal end MCU connects MCU clock crystal oscillator signal end.The circuit meets the needs of specific vehicle audio, under different voltage, can accurately realize oscillation or stop oscillation, and making and receiving calls function is realized by Bluetooth circuit, it takes mobile phone without user, enhances drive safety, and foregoing circuit design is rationally, stable.
Description
Technical field
The present invention relates to vehicle audio electronic circuit fields more particularly to one kind to have automatic control and wireless communication function
Vehicle audio and its working method.
Background technique
In the prior art, today's society automobile is more more and more universal, and for a user, automobile not only becomes walking-replacing tool,
It is also a kind of consumer product of personalization, so automobile factory commercial city joined vehicle audio and bring better user experience, but
It is that the vehicle audio of the prior art and external clock cannot be synchronous, and the clock oscillation of vehicle audio itself is also inaccurate, has
Some sound equipments although have crystal oscillator but circuit design is unreasonable, fluctuation of service.User connects intelligent terminal by Bluetooth circuit
Later, can not know whether vehicle mounted microphone is available or works normally.This just needs those skilled in the art and solves accordingly
Technical problem.
Summary of the invention
The present invention is directed at least solve the technical problems existing in the prior art, especially innovatively proposes one kind and have certainly
The vehicle audio and its working method of dynamic control and wireless communication function.
In order to realize above-mentioned purpose of the invention, have automatic control and wireless communication function the present invention provides a kind of
Vehicle audio, comprising: MCU controller, Bluetooth circuit, microphone detection circuit, MCU clock crystal oscillator；
The controller Bluetooth signal end MCU connects Bluetooth circuit signal end, and Bluetooth circuit microphone signal end connects microphone detection
Circuit signal end, the controller crystal oscillation signal end MCU connect MCU clock crystal oscillator signal end.
Above-mentioned technical proposal has the beneficial effect that the circuit meets the needs of specific vehicle audio, under different voltage,
It can accurately realize oscillation or stop oscillation, and by Bluetooth circuit realization making and receiving calls function, take hand without user
Machine enhances drive safety, and foregoing circuit design is rationally, stable.
The vehicle audio for having automatic control and wireless communication function, it is preferred that the microphone detection circuit packet
It includes:
MCU controller microphone detection control terminal is separately connected the 54th field-effect tube collector and the 96th resistance one end, and the 96th
The resistance other end connects 3.3V power end, and the 54th field-effect tube base stage is separately connected the 107th resistance one end and the 235th capacitor one
End, the 235th capacitor other end are separately connected the 54th field-effect tube emitter and ground connection, and the 107th resistance other end connects bluetooth electricity
Road microphone signal end.
Above-mentioned technical proposal has the beneficial effect that the circuit realizes microphone identification function, does not connect in microphone or microphone
Enter state, low-power consumption is kept by MCU, after microphone access, whether identification microphone is normally inserted into, to be in vehicle-mounted
Energy-saving, the circuit reasonable circuit layout is controlled, it is stable.
The vehicle audio for having automatic control and wireless communication function, it is preferred that the Bluetooth circuit includes:
The 231st capacitor of antenna one end parallel connection, then connects Bluetooth chip antenna signal interaction end, Bluetooth chip microphone signal
End the 18th capacitor one end of connection, the 18th capacitor other end connect the 30th resistance one end, and the 30th resistance other end connects the 107th resistance
The other end, the 18th capacitor other end are also connected with the 28th resistance one end, the 28th resistance other end ground connection, Bluetooth chip microphone signal end
It is also connected with the 19th capacitor one end, the 19th capacitor other end is separately connected the 29th resistance one end and the 33rd resistance one end, the 29th resistance
Other end ground connection, the 33rd resistance other end connect the 186th resistance one end, and the 186th resistance other end connects 8V power supply, Bluetooth chip
Reading data end connects the 25th resistance one end, and the 25th resistance other end is separately connected the 36th resistance one end and data bus terminal, the
The 36 resistance other ends connect 3.3V power supply, and Bluetooth chip data sending terminal connects the 26th resistance one end, and the 26th resistance other end connects
Connect data bus terminal.
Above-mentioned technical proposal has the beneficial effect that the access state that microphone or microphone are identified by Bluetooth circuit, will
Data transmission is judged to MCU, makes the user do not need to take mobile phone and realize the function of taking call.
The vehicle audio for having automatic control and wireless communication function, it is preferred that the MCU clock crystal oscillator packet
It includes:
5th capacitor one end is separately connected the 1st diode cathode and the 2nd diode cathode, the 1st diode cathode connecting sound equipment
Power button, the 2nd diode cathode connect MCU controller crystal oscillator control terminal, and the 2nd diode cathode is also connected with the 1st field-effect tube
Base stage, the 1st field-effect tube base stage are also connected with the 4th resistance one end, and the 4th resistance other end connects the 3rd diode cathode, the 3rd two pole
Pipe cathode connects automobile ACC signal, and MCU controller power supply end connects the 5th resistance one end, the 5th resistance other end connection the 1st
Field-effect tube collector, the 1st field-effect tube collector are also connected with main crystal oscillator chip enable end, oikocryst vibration chip data input terminal point
Not Lian Jie the 6th inductance one end and the 2nd capacitor one end, the 6th inductance other end connect the 4th capacitor one end, the 4th another termination of capacitor
Ground, the 2nd capacitor other end ground connection, oikocryst vibration control chip data input terminal are also connected with no source crystal oscillator one end, and no source crystal oscillator is another
End is separately connected the 2nd resistance one end and the 7th capacitor one end, the 7th capacitor other end ground connection, and the 2nd resistance other end connects oikocryst vibration
Chip data output end, main crystal oscillator chip feeder ear are separately connected the 13rd inductance one end and the 1st capacitor one end, and the 13rd inductance is another
End connection power supply end, the 1st capacitor other end ground connection.
Above-mentioned technical proposal has the beneficial effect that the circuit meets the needs of specific vehicle audio, under different voltage,
It can accurately realize oscillation or stop oscillation, and circuit design is reasonable, it is stable.
The vehicle audio for having automatic control and wireless communication function, it is preferred that further include reversing circuit: MCU
Controller astern signal end connection reversing circuit astern signal end of probe；
The reversing circuit includes: the 72nd resistance one end connection astern signal end, and the 72nd resistance other end is separately connected the
53 resistance one end and the 41st diode cathode, the 53rd resistance other end ground connection, the 41st diode cathode ground connection, the 41st diode are negative
Pole is also connected with the 70th resistance one end, and the 70th resistance other end is separately connected the 99th capacitor one end and the 71st resistance one end, the 99th electricity
Hold other end ground connection, the 71st resistance other end ground connection, the 71st resistance one end is also connected with MCU controller astern signal end.
Having the beneficial effect that for above-mentioned technical proposal can be controlled reversing information Real-time Feedback to MCU by reversing circuit
Device, MCU carry out respective handling, and the circuit design is reasonable.
The vehicle audio for having automatic control and wireless communication function, it is preferred that further include front truck headlight circuit:
MCU controller front truck headlight signal end connects front truck headlight circuit light signal end of probe；
The front truck headlight circuit includes: that front truck headlight signal end connects the 56th resistance one end, the 56th resistance other end point
Not Lian Jie the 119th resistance one end and the 6th diode cathode, the 119th resistance other end ground connection, the 6th diode cathode ground connection, the 6th
Diode cathode is also connected with the 54th resistance one end, and the 54th resistance other end is separately connected the 62nd capacitor one end and the 31st resistance one
End, the 62nd capacitor other end ground connection, the 31st resistance other end ground connection, the 31st resistance one end are also connected with the 52nd triode grid, the
52 triode source electrodes ground connection, the drain electrode of the 52nd triode are separately connected the 10th resistance one end and the 11st resistance one end, and the 11st resistance is another
One end connects power supply end, and the 10th resistance other end is separately connected the 232nd capacitor one end and the big modulating signal of MCU controller front truck
End of probe, the 232nd capacitor other end connect the 52nd triode source electrode, and the 52nd triode grid is also respectively connected with the 13rd resistance one end
With the 14th resistance one end, the 13rd resistance other end connects MCU controller front truck headlight PWM modulation signal end, and the 14th resistance is another
End connection MCU controller front truck headlight signal detection end.
Having the beneficial effect that for above-mentioned technical proposal can be by headlight information Real-time Feedback to MCU by front truck headlight circuit
Controller, MCU carry out respective handling, and the circuit design is reasonable.
The vehicle audio for having automatic control and wireless communication function, it is preferred that further include system power switch
Circuit；The controller system power switch signal end MCU connects system power switch circuit MCU switching signal end, and system power supply is opened
Powered-down road system power supply end connects system power supply switch terminals, and system power switch circuit power supply end connects circuit power supply
End；
The system power switch circuit includes: the 5th field-effect tube base stage connection MCU controller system power switch signal
End, the 5th field-effect tube emitter ground connection, the 5th field-effect tube collector connect the 66th resistance one end, the 66th resistance other end difference
The 91st resistance one end and the 2nd field-effect tube base stage are connected, the 91st resistance other end is separately connected the 2nd field-effect tube emitter and
79 capacitor one end, the 79th capacitor other end ground connection, the 2nd field-effect tube emitter are also connected with circuit power supply end, the 2nd field-effect
Pipe collector is separately connected the 68th resistance one end and the 85th capacitor one end, the 68th resistance other end ground connection, the 85th capacitor other end
Ground connection, the 85th capacitor one end are also respectively connected with the 84th capacitor one end and system power supply switch terminals, the 84th capacitor other end ground connection.
Above-mentioned technical proposal has the beneficial effect that system power switch plays the role of the vehicle-mounted middle control power supply start and stop of control,
It ensure that the normally-open of system and shutdown, energy-saving, power supply output is stablized.
The vehicle audio for having automatic control and wireless communication function, it is preferred that further include MCU reset circuit；
MCU reset circuit signal end connects MCU controller and resets end, and MCU reset circuit power control terminal connects circuit power end；
The MCU reset circuit includes: that MCU controller resetting end is separately connected the 73rd capacitor one end and resetting chip resetting
End, the 73rd capacitor other end ground connection, MCU controller resetting end are also connected with the 58th resistance one end, and the 58th resistance other end connects MCU
Controller power source signal end, resetting chip power end are separately connected the 72nd capacitor one end and power supply feeder ear, the 72nd capacitor
Other end ground connection.
Having the beneficial effect that for above-mentioned technical proposal can guarantee that delay machine or exception occurs in vehicle-mounted middle control by reset circuit
When state, refreshed again, circuit design is reasonable.
The vehicle audio for having automatic control and wireless communication function, it is preferred that further include memory；MCU control
Device store clock signal end processed connects memory clock signal end, and MCU controller data output end connects memory data input
End, memory power end connect power supply end；
The memory includes: that power supply end is separately connected the 9th capacitor one end and the 8th capacitor one end, and the 9th capacitor is another
End is grounded, the 8th capacitor other end ground connection, and power supply end is also connected with storage chip power end and stores communication holding end, and the 12nd
Resistance one end connects power supply end, and the 12nd resistance other end connects storage chip write-protect end, the 9th resistance one end connection the 12nd
Resistance one end, the 9th resistance other end are separately connected the chip selection end and MCU controller chip selection end of storage chip, MCU control
Device data input pin processed connects storage chip data output end.
Having the beneficial effect that for above-mentioned technical proposal stores relevant control parameter by memory, is called at any time by MCU
And storage.
Invention additionally discloses a kind of vehicle audio working method for having automatic control and wireless communication function, including it is as follows
Step:
S1, vehicle audio are initialized, and the MCU controller of vehicle audio carries out power on operation；
The detection of S2, MCU controller cut-in voltage, judges voltage status detected by MCU controller, if detection
Voltage in normal range value, does not execute S3, if the voltage of detection executes S4 in normal range value；
S3, MCU controller control vehicle audio enter low-power consumption mode；
S4, MCU controller judge whether fired state is opened, if fired state is opened, are directly entered normal work mould
Formula executes S5 if fired state is closed；
S5, MCU controller control vehicle audio enter low-power consumption mode, and whether real-time judge user in low-power consumption mode
Triggering booting Power key, enters long-time timing mode if triggering is switched on Power key, S6 is executed, if do not triggered out
Machine Power key, then persistently keep low-power consumption mode；
S6, in long-time timing mode process, whether real-time judge user triggers shutdown Power key, if triggering is closed
Machine Power key then enters short time timing shutdown mode, executes S7, lasting to keep length if not triggering shutdown Power key
Time timing mode is finished to long-time timing mode, and MCU controller control vehicle audio enters low-power consumption mode；
S7, during short time timing mode, whether real-time judge user triggers booting Power key, if triggering is opened
Machine Power key then enters long-time timing mode, executes S5, if not triggering booting Power key, persistently keeps the short time
Timing mode is finished to short time timing shutdown mode, and MCU controller control vehicle audio enters low-power consumption mode.
Having the beneficial effect that for above-mentioned technical proposal controls vehicle-mounted middle control by this method, the Power if vehicle-mounted middle control is switched on
Key or shutdown Power key issue command adapted thereto, and MCU is judged according to the above method, in idle state or non-artificial touching
Hair-like state, vehicle-mounted middle control enters corresponding low-power consumption or normal power consumption, to realize the energy-saving of vehicle-mounted middle control, guarantees vehicle
Operational safety is controlled in load to stablize, and more comfortable user experience is provided.
In conclusion by adopting the above-described technical solution, the beneficial effects of the present invention are:
The circuit meets the needs of specific vehicle audio, under different voltage, can accurately realize oscillation or stopping
Oscillation, and by Bluetooth circuit realization making and receiving calls function, it takes mobile phone without user, enhances drive safety, and
Foregoing circuit design is rationally, stable.
Vehicle-mounted middle control is controlled by this method, if vehicle-mounted middle control booting Power key or shutdown Power key issue accordingly
Instruction, MCU are judged that, in idle state or non-artificial triggering state, vehicle-mounted middle control enters corresponding according to the above method
Low-power consumption or normal power consumption guarantee that vehicle-mounted middle control operational safety is stablized, provide more to realize the energy-saving of vehicle-mounted middle control
Add comfortable user experience.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures
Obviously and it is readily appreciated that, in which:
Fig. 1 is general illustration of the present invention；
Fig. 2 is present invention reversing circuit diagram；
Fig. 3 is firing circuit schematic diagram of the present invention；
Fig. 4 is front truck headlight circuit schematic diagram of the present invention；
Fig. 5 is present system power switch schematic diagram；
Fig. 6 is MCU power supply circuit schematic diagram of the present invention；
Fig. 7 is cell-monitoring circuit schematic diagram of the present invention；
Fig. 8 is MCU reset circuit schematic diagram of the present invention；
Fig. 9 is the vehicle-mounted middle control keystroke interface schematic diagram of the present invention；
Figure 10 is AccessPort circuit diagram of the present invention；
Figure 11 is memory schematic diagram of the present invention；
Figure 12 is MCU clock crystal oscillator schematic diagram of the present invention；
Figure 13 is RTC timer schematic diagram of the present invention；
Figure 14 is MCU the left side of the controller circuit diagram of the present invention；
Figure 15 is MCU controller underside circuits schematic diagram of the present invention；
Figure 16 is circuit diagram on the right side of MCU controller of the present invention；
Figure 17 is circuit diagram on the upside of MCU controller of the present invention；
Figure 18 is bluetooth power supply circuit schematic diagram of the present invention；
Figure 19 is inventive microphone detection circuit schematic diagram；
Figure 20 is Bluetooth circuit schematic diagram of the present invention；
Figure 21 is the method for the present invention flow chart.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and for explaining only the invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " longitudinal direction ", " transverse direction ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to limit of the invention
System.
In the description of the present invention, unless otherwise specified and limited, it should be noted that term " installation ", " connected ",
" connection " shall be understood in a broad sense, for example, it may be mechanical connection or electrical connection, the connection being also possible to inside two elements can
, can also indirectly connected through an intermediary, for the ordinary skill in the art to be to be connected directly, it can basis
Concrete condition understands the concrete meaning of above-mentioned term.
As shown in Figure 1, the present invention provides a kind of vehicle audio for having automatic control and wireless communication function, feature
It is, comprising: MCU controller, Bluetooth circuit, microphone detection circuit, MCU clock crystal oscillator；
The controller Bluetooth signal end MCU connects Bluetooth circuit signal end, and Bluetooth circuit microphone signal end connects microphone detection
Circuit signal end, the controller crystal oscillation signal end MCU connect MCU clock crystal oscillator signal end.
Above-mentioned technical proposal has the beneficial effect that the circuit meets the needs of specific vehicle audio, under different voltage,
It can accurately realize oscillation or stop oscillation, and by Bluetooth circuit realization making and receiving calls function, take hand without user
Machine enhances drive safety, and foregoing circuit design is rationally, stable.
As shown in figure 3, automobile sparking start end connects the 55th resistance one end, the 55th resistance other end is separately connected the 57th electricity
One end and the 8th diode cathode, the 57th resistance other end ground connection are hindered, the 8th diode cathode is grounded, and the 8th diode cathode also connects
The 32nd resistance one end is connect, the 32nd resistance other end is separately connected the 70th capacitor one end and the 67th resistance one end, and the 70th capacitor is another
End ground connection, the 67th resistance other end ground connection, the 67th resistance one end are also connected with MCU control sparking starting end of probe.
As shown in fig. 6, MCU power supply circuit includes: that power supply end is separately connected the 83rd capacitor one end and the 14th inductance one
End, the 83rd capacitor other end ground connection, the 14th inductance other end are separately connected the 94th capacitor one end, the 88th capacitor one end, the 90th electricity
Hold one end, the 91st capacitor one end, the 97th capacitor one end, the 98th capacitor one end, the 94th capacitor other end, the 88th capacitor other end,
The 90th capacitor other end, the 91st capacitor other end, the 97th capacitor other end, the 98th capacitor other end are grounded respectively, the 98th capacitor
The other end is also connected with MCU feeder ear.
As shown in fig. 7, cell-monitoring circuit includes: the 7th diode cathode ground connection, the 7th diode cathode connects power end,
7th diode third end connects the 78th capacitor one end and MCU controller battery detection end, and the 78th capacitor other end is grounded, and the 78th
Capacitor one end is also respectively connected with the 65th resistance one end and the 64th resistance one end, and the 65th resistance other end is grounded, and the 64th resistance is another
End connection power end.
As shown in figure 9, vehicle-mounted middle control keystroke interface includes: to connect keystroke interface LED control terminal by LED control button,
Power supply control button connects keystroke interface power control terminal, and resetting control key connection keystroke interface resets control terminal, wherein key
Interface is preferably 9850B-30Y917.
As described in Figure 10, AccessPort circuit includes: that MCU controller is transmitted by RS232 bus, power end connection
93rd resistance one end, the 93rd resistance other end connect AccessPort interface modes end, and total line output terminal connects 90 resistance one end of ground,
The 90th resistance other end connects AccessPort interface bus input terminal.
As shown in figure 13, RTC timer includes: that the 76th capacitor one end is separately connected the 60th resistance one end and crystal oscillator one end,
Crystal oscillator one end is also connected with MCU controller RTC timing signal output end, and it is defeated that the crystal oscillator other end connects MCU controller RTC timing signal
Enter end, the crystal oscillator other end is also respectively connected with the 60th resistance other end and the 77th capacitor one end, the 77th capacitor other end ground connection.
As shown in Figure 14,15,16,17, MCU controller circuitry schematic diagram, IC chip (nFore2301) connects MCU control
Device IC control terminal processed carries out data interaction by IC chip and the vehicle-mounted middle other equipment of control, and decoding chip (TMC56D) passes through string
Mouth connection MCU controller decoding end, MCU controller light display end connect LED display lamp, and the MCU controller usb data is handed over
Mutually end connects USB interface by USB chip (TS3DS10224), and MCU controller connects loudspeaker and tune by IIC2 interaction end
Humorous radio (TEF6635), loudspeaker carry out power amplification by power amplifier chips (TDA8595).
As shown in figure 18, bluetooth power supply circuit includes: that battery supply end is separately connected the 121st capacitor one end, the 122nd capacitor
One end, the 13rd capacitor one end, the 20th capacitor one end, the 14th capacitor one end, the 24th capacitor one end, the 121st capacitor other end,
The 122nd capacitor other end, the 13rd capacitor other end, the 20th capacitor other end, the 14th capacitor other end, the 24th capacitor other end point
It not being grounded, described 121st capacitor one end is also connected with the 10th inductance one end, and the 10th inductance other end connects the 10th capacitor one end, the
10 capacitor other ends ground connection, the 10th capacitor one end are also respectively connected with the 17th capacitor one end and power output end, and the 17th capacitor is another
End ground connection.
As shown in figure 19, the vehicle audio for having automatic control and wireless communication function, it is preferred that the microphone
Detection circuit includes:
MCU controller microphone detection control terminal is separately connected the 54th field-effect tube collector and the 96th resistance one end, and the 96th
The resistance other end connects 3.3V power end, and the 54th field-effect tube base stage is separately connected the 107th resistance one end and the 235th capacitor one
End, the 235th capacitor other end are separately connected the 54th field-effect tube emitter and ground connection, and the 107th resistance other end connects bluetooth electricity
Road microphone signal end.
Above-mentioned technical proposal has the beneficial effect that the circuit realizes microphone identification function, does not connect in microphone or microphone
Enter state, low-power consumption is kept by MCU, after microphone access, whether identification microphone is normally inserted into, to be in vehicle-mounted
Energy-saving, the circuit reasonable circuit layout is controlled, it is stable.
When there is microphone to plug, Q54 conducting, it is low level that MCU controller microphone, which detects control terminal, when MCU is detected
When to the low level, then judge that microphone has been plugged；When not plugging microphone, Q54 cut-off, the detection of MCU controller microphone
Control terminal is high level, when MCU detects the high level, then judges that microphone is not plugged.
As shown in figure 20, the vehicle audio for having automatic control and wireless communication function, it is preferred that the bluetooth
Circuit includes:
The 231st capacitor of antenna one end parallel connection, then connects Bluetooth chip antenna signal interaction end, Bluetooth chip microphone signal
End the 18th capacitor one end of connection, the 18th capacitor other end connect the 30th resistance one end, and the 30th resistance other end connects the 107th resistance
The other end, the 18th capacitor other end are also connected with the 28th resistance one end, the 28th resistance other end ground connection, Bluetooth chip microphone signal end
It is also connected with the 19th capacitor one end, the 19th capacitor other end is separately connected the 29th resistance one end and the 33rd resistance one end, the 29th resistance
Other end ground connection, the 33rd resistance other end connect the 186th resistance one end, and the 186th resistance other end connects 8V power supply, Bluetooth chip
Reading data end connects the 25th resistance one end, and the 25th resistance other end is separately connected the 36th resistance one end and data bus terminal, the
The 36 resistance other ends connect 3.3V power supply, and Bluetooth chip data sending terminal connects the 26th resistance one end, and the 26th resistance other end connects
Connect data bus terminal.
Above-mentioned technical proposal has the beneficial effect that the access state that microphone or microphone are identified by Bluetooth circuit, will
Data transmission is judged to MCU, makes the user do not need to take mobile phone and realize the function of taking call.
As shown in figure 12, the vehicle audio for having automatic control and wireless communication function, it is preferred that the MCU
Clock crystal oscillator includes:
5th capacitor one end is separately connected the 1st diode cathode and the 2nd diode cathode, the 1st diode cathode connecting sound equipment
Power button, the 2nd diode cathode connect MCU controller crystal oscillator control terminal, and the 2nd diode cathode is also connected with the 1st field-effect tube
Base stage, the 1st field-effect tube base stage are also connected with the 4th resistance one end, and the 4th resistance other end connects the 3rd diode cathode, the 3rd two pole
Pipe cathode connects automobile ACC signal, and MCU controller power supply end connects the 5th resistance one end, the 5th resistance other end connection the 1st
Field-effect tube collector, the 1st field-effect tube collector are also connected with main crystal oscillator chip enable end, oikocryst vibration chip data input terminal point
Not Lian Jie the 6th inductance one end and the 2nd capacitor one end, the 6th inductance other end connect the 4th capacitor one end, the 4th another termination of capacitor
Ground, the 2nd capacitor other end ground connection, oikocryst vibration control chip data input terminal are also connected with no source crystal oscillator one end, and no source crystal oscillator is another
End is separately connected the 2nd resistance one end and the 7th capacitor one end, the 7th capacitor other end ground connection, and the 2nd resistance other end connects oikocryst vibration
Chip data output end, main crystal oscillator chip feeder ear are separately connected the 13rd inductance one end and the 1st capacitor one end, and the 13rd inductance is another
End connection power supply end, the 1st capacitor other end ground connection.
When sound equipment is in standby, user presses power key, and D1 conducting, Q1 conducting, the EN foot of U2 is low level, brilliant
Vibration starting of oscillation, stable running clock is provided for MCU.
When sound equipment is in standby, automobile plugs key and opens ACC, D3 conducting, Q1 conducting, and the EN foot of U2 is low
Level, crystal oscillator starting of oscillation provide stable running clock for MCU.
When sound equipment is in normal operating conditions, MCU controller crystal oscillator control terminal exports high level, D2 conducting, Q1 conducting, U2
EN foot be low level, crystal oscillator persistent oscillation, when automobile closes ACC or when too low automobile battery voltage, MCU initially enters standby
Mode ensure that the oscillation of crystal oscillator is during entering low-power consumption since MCU controller crystal oscillator control terminal exports high level
Stable, after MCU enters low-power consumption, MCU controller crystal oscillator control terminal exports low level, D2 cut-off, and sound equipment power key is not pressed
Under, D1 cut-off, ACC is closed, D3 cut-off, so Q1 ends, the EN foot of U2 is high level, and crystal oscillator stops oscillation.
Above-mentioned technical proposal has the beneficial effect that the circuit meets the needs of specific vehicle audio, under different voltage,
It can accurately realize oscillation or stop oscillation, and circuit design is reasonable, it is stable.
As shown in Fig. 2, the vehicle audio for having automatic control and wireless communication function, it is preferred that further include down
Vehicle circuit: the controller astern signal end MCU connection reversing circuit astern signal end of probe；
The reversing circuit includes: the 72nd resistance one end connection astern signal end, and the 72nd resistance other end is separately connected the
53 resistance one end and the 41st diode cathode, the 53rd resistance other end ground connection, the 41st diode cathode ground connection, the 41st diode are negative
Pole is also connected with the 70th resistance one end, and the 70th resistance other end is separately connected the 99th capacitor one end and the 71st resistance one end, the 99th electricity
Hold other end ground connection, the 71st resistance other end ground connection, the 71st resistance one end is also connected with MCU controller astern signal end.
Having the beneficial effect that for above-mentioned technical proposal can be controlled reversing information Real-time Feedback to MCU by reversing circuit
Device, MCU carry out respective handling, and the circuit design is reasonable.
As shown in figure 4, the vehicle audio for having automatic control and wireless communication function, it is preferred that before further including
Vehicle headlight circuit: MCU controller front truck headlight signal end connects front truck headlight circuit light signal end of probe；
The front truck headlight circuit includes: that front truck headlight signal end connects the 56th resistance one end, the 56th resistance other end point
Not Lian Jie the 119th resistance one end and the 6th diode cathode, the 119th resistance other end ground connection, the 6th diode cathode ground connection, the 6th
Diode cathode is also connected with the 54th resistance one end, and the 54th resistance other end is separately connected the 62nd capacitor one end and the 31st resistance one
End, the 62nd capacitor other end ground connection, the 31st resistance other end ground connection, the 31st resistance one end are also connected with the 52nd triode grid, the
52 triode source electrodes ground connection, the drain electrode of the 52nd triode are separately connected the 10th resistance one end and the 11st resistance one end, and the 11st resistance is another
One end connects power supply end, and the 10th resistance other end is separately connected the 232nd capacitor one end and the big modulating signal of MCU controller front truck
End of probe, the 232nd capacitor other end connect the 52nd triode source electrode, and the 52nd triode grid is also respectively connected with the 13rd resistance one end
With the 14th resistance one end, the 13rd resistance other end connects MCU controller front truck headlight PWM modulation signal end, and the 14th resistance is another
End connection MCU controller front truck headlight signal detection end.
Having the beneficial effect that for above-mentioned technical proposal can be by headlight information Real-time Feedback to MCU by front truck headlight circuit
Controller, MCU carry out respective handling, and the circuit design is reasonable.
As shown in figure 5, the vehicle audio for having automatic control and wireless communication function, it is preferred that further include being
System power switch circuit；The controller system power switch signal end MCU connects system power switch circuit MCU switching signal end,
System power switch circuit system power end connects system power supply switch terminals, system power switch circuit power supply end connection electricity
Road power supply end；
The system power switch circuit includes: the 5th field-effect tube base stage connection MCU controller system power switch signal
End, the 5th field-effect tube emitter ground connection, the 5th field-effect tube collector connect the 66th resistance one end, the 66th resistance other end difference
The 91st resistance one end and the 2nd field-effect tube base stage are connected, the 91st resistance other end is separately connected the 2nd field-effect tube emitter and
79 capacitor one end, the 79th capacitor other end ground connection, the 2nd field-effect tube emitter are also connected with circuit power supply end, the 2nd field-effect
Pipe collector is separately connected the 68th resistance one end and the 85th capacitor one end, the 68th resistance other end ground connection, the 85th capacitor other end
Ground connection, the 85th capacitor one end are also respectively connected with the 84th capacitor one end and system power supply switch terminals, the 84th capacitor other end ground connection.
Above-mentioned technical proposal has the beneficial effect that system power switch plays the role of the vehicle-mounted middle control power supply start and stop of control,
It ensure that the normally-open of system and shutdown, energy-saving, power supply output is stablized.
As shown in figure 8, the vehicle audio for having automatic control and wireless communication function, it is preferred that further include MCU
Reset circuit；MCU reset circuit signal end connects MCU controller and resets end, and MCU reset circuit power control terminal connects circuit electricity
Source；
The MCU reset circuit includes: that MCU controller resetting end is separately connected the 73rd capacitor one end and resetting chip resetting
End, the 73rd capacitor other end ground connection, MCU controller resetting end are also connected with the 58th resistance one end, and the 58th resistance other end connects MCU
Controller power source signal end, resetting chip power end are separately connected the 72nd capacitor one end and power supply feeder ear, the 72nd capacitor
Other end ground connection.
Having the beneficial effect that for above-mentioned technical proposal can guarantee that delay machine or exception occurs in vehicle-mounted middle control by reset circuit
When state, refreshed again, circuit design is reasonable.
As shown in figure 11, the vehicle audio for having automatic control and wireless communication function, it is preferred that further include depositing
Reservoir；MCU controller store clock signal end connects memory clock signal end, the connection storage of MCU controller data output end
Device data input pin, memory power end connect power supply end；
The memory includes: that power supply end is separately connected the 9th capacitor one end and the 8th capacitor one end, and the 9th capacitor is another
End is grounded, the 8th capacitor other end ground connection, and power supply end is also connected with storage chip power end and stores communication holding end, and the 12nd
Resistance one end connects power supply end, and the 12nd resistance other end connects storage chip write-protect end, the 9th resistance one end connection the 12nd
Resistance one end, the 9th resistance other end are separately connected the chip selection end and MCU controller chip selection end of storage chip, MCU control
Device data input pin processed connects storage chip data output end.
Having the beneficial effect that for above-mentioned technical proposal stores relevant control parameter by memory, is called at any time by MCU
And storage.
As shown in figure 21, invention additionally discloses a kind of vehicle audio work sides for having automatic control and wireless communication function
Method includes the following steps:
S1, vehicle audio are initialized, and the MCU controller of vehicle audio carries out power on operation；
The detection of S2, MCU controller cut-in voltage, judges voltage status detected by MCU controller, if detection
Voltage in normal range value, does not execute S3, if the voltage of detection executes S4 in normal range value；
S3, MCU controller control vehicle audio enter low-power consumption mode；
S4, MCU controller judge whether fired state is opened, if fired state is opened, are directly entered normal work mould
Formula executes S5 if fired state is closed；
S5, MCU controller control vehicle audio enter low-power consumption mode, and whether real-time judge user in low-power consumption mode
Triggering booting Power key, enters long-time timing mode if triggering is switched on Power key, S6 is executed, if do not triggered out
Machine Power key, then persistently keep low-power consumption mode；
S6, in long-time timing mode process, whether real-time judge user triggers shutdown Power key, if triggering is closed
Machine Power key then enters short time timing shutdown mode, executes S7, lasting to keep length if not triggering shutdown Power key
Time timing mode is finished to long-time timing mode, and MCU controller control vehicle audio enters low-power consumption mode；
S7, during short time timing mode, whether real-time judge user triggers booting Power key, if triggering is opened
Machine Power key then enters long-time timing mode, executes S5, if not triggering booting Power key, persistently keeps the short time
Timing mode is finished to short time timing shutdown mode, and MCU controller control vehicle audio enters low-power consumption mode.
Having the beneficial effect that for above-mentioned technical proposal controls vehicle-mounted middle control by this method, the Power if vehicle-mounted middle control is switched on
Key or shutdown Power key issue command adapted thereto, and MCU is judged according to the above method, in idle state or non-artificial touching
Hair-like state, vehicle-mounted middle control enters corresponding low-power consumption or normal power consumption, to realize the energy-saving of vehicle-mounted middle control, guarantees vehicle
Operational safety is controlled in load to stablize, and more comfortable user experience is provided.
Wherein Q2 is preferably SMBT1229LT1G, and Q1, Q5 are preferably PDTC143ZT.
Chip is preferably NCP803SN308T1G in the reset circuit of MCU.
7th diode is preferably BAV99.
Key circuit is preferably 9850B-30Y917.
MCU controller is preferably MB9G711DA.
The preferred U2 of clock crystal oscillator is 74AUP1Z04GW.
Memory is preferably S25FL032P0XMFI013.
Bluetooth chip is preferably NF2301.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiment or examples in can be combined in any suitable manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: not
A variety of change, modification, replacement and modification can be carried out to these embodiments in the case where being detached from the principle of the present invention and objective, this
The range of invention is defined by the claims and their equivalents.
Claims (9)
1. a kind of vehicle audio for having automatic control and wireless communication function characterized by comprising MCU controller, bluetooth
Circuit, microphone detection circuit, MCU clock crystal oscillator；
The controller Bluetooth signal end MCU connects Bluetooth circuit signal end, and Bluetooth circuit microphone signal end connects microphone detection circuit
Signal end, the controller crystal oscillation signal end MCU connect MCU clock crystal oscillator signal end；
The microphone detection circuit includes:
MCU controller microphone detection control terminal is separately connected the 54th field-effect tube collector and the 96th resistance one end, the 96th resistance
The other end connects 3.3V power end, and the 54th field-effect tube base stage is separately connected the 107th resistance one end and the 235th capacitor one end, the
The 235 capacitor other ends are separately connected the 54th field-effect tube emitter and ground connection, and the 107th resistance other end connects Bluetooth circuit microphone
Signal end；
When Bluetooth circuit microphone signal end has microphone to plug, it is low level that MCU controller microphone, which detects control terminal, when MCU is controlled
When device processed detects the low level, then judge that microphone has been plugged；When microphone is not plugged in Bluetooth circuit microphone signal end, MCU control
Device microphone detection control terminal processed is that high level then judges that microphone is not plugged, vehicle when MCU controller detects the high level
It carries sound equipment and low-power consumption mode is kept by MCU controller.
2. the vehicle audio according to claim 1 for having automatic control and wireless communication function, which is characterized in that described
Bluetooth circuit includes:
The 231st capacitor of antenna one end parallel connection, then connects Bluetooth chip antenna signal interaction end, and Bluetooth chip microphone signal end connects
The 18th capacitor one end is connect, the 18th capacitor other end connects the 30th resistance one end, and it is another that the 30th resistance other end connects the 107th resistance
End, the 18th capacitor other end are also connected with the 28th resistance one end, and the 28th resistance other end ground connection, Bluetooth chip microphone signal end also connects
The 19th capacitor one end is connect, the 19th capacitor other end is separately connected the 29th resistance one end and the 33rd resistance one end, and the 29th resistance is another
End ground connection, the 33rd resistance other end connect the 186th resistance one end, and the 186th resistance other end connects 8V power supply, Bluetooth chip data
It reads end and connects the 25th resistance one end, the 25th resistance other end is separately connected the 36th resistance one end and data bus terminal, the 36th electricity
It hinders the other end and connects 3.3V power supply, Bluetooth chip data sending terminal connects the 26th resistance one end, the 26th resistance other end connection number
According to bus end.
3. the vehicle audio according to claim 1 for having automatic control and wireless communication function, which is characterized in that described
MCU clock crystal oscillator includes:
5th capacitor one end is separately connected the 1st diode cathode and the 2nd diode cathode, the 1st diode cathode connecting sound equipment power supply
Key, the 2nd diode cathode connect MCU controller crystal oscillator control terminal, and the 2nd diode cathode is also connected with the 1st field-effect tube base stage,
1st field-effect tube base stage is also connected with the 4th resistance one end, and the 4th resistance other end connects the 3rd diode cathode, the 3rd diode cathode
Automobile ACC signal is connected, MCU controller power supply end connects the 5th resistance one end, and the 5th resistance other end connects the 1st field-effect
Pipe collector, the 1st field-effect tube collector are also connected with main crystal oscillator chip enable end, and oikocryst vibration chip data input terminal is separately connected
6th inductance one end and the 2nd capacitor one end, the 6th inductance other end connect the 4th capacitor one end, the 4th capacitor other end ground connection, the 2nd electricity
Hold other end ground connection, oikocryst vibration control chip data input terminal is also connected with no source crystal oscillator one end, and the no source crystal oscillator other end connects respectively
The 2nd resistance one end and the 7th capacitor one end, the 7th capacitor other end ground connection are connect, the 2nd resistance other end connects oikocryst vibration chip data
Output end, main crystal oscillator chip feeder ear are separately connected the 13rd inductance one end and the 1st capacitor one end, and the connection of the 13rd inductance other end supplies
Electric power end, the 1st capacitor other end ground connection.
4. the vehicle audio according to claim 1 for having automatic control and wireless communication function, which is characterized in that also wrap
Include reversing circuit: the controller astern signal end MCU connection reversing circuit astern signal end of probe；
The reversing circuit includes: the 72nd resistance one end connection astern signal end, and the 72nd resistance other end is separately connected the 53rd electricity
One end and the 41st diode cathode are hindered, the 53rd resistance other end ground connection, the 41st diode cathode ground connection, the 41st diode cathode is also
The 70th resistance one end is connected, the 70th resistance other end is separately connected the 99th capacitor one end and the 71st resistance one end, and the 99th capacitor is another
One end ground connection, the 71st resistance other end ground connection, the 71st resistance one end is also connected with MCU controller astern signal end.
5. the vehicle audio according to claim 1 for having automatic control and wireless communication function, which is characterized in that also wrap
Include front truck headlight circuit: MCU controller front truck headlight signal end connects front truck headlight circuit light signal end of probe；
The front truck headlight circuit includes: that front truck headlight signal end connects the 56th resistance one end, and the 56th resistance other end connects respectively
Connect the 119th resistance one end and the 6th diode cathode, the 119th resistance other end ground connection, the 6th diode cathode ground connection, the 6th two pole
Pipe cathode is also connected with the 54th resistance one end, and the 54th resistance other end is separately connected the 62nd capacitor one end and the 31st resistance one end, the
62 capacitor other ends ground connection, the 31st resistance other end ground connection, the 31st resistance one end is also connected with the 52nd triode grid, the 52nd 3 pole
Pipe source electrode ground connection, the drain electrode of the 52nd triode are separately connected the 10th resistance one end and the 11st resistance one end, and the 11st resistance other end connects
Power supply end is connect, the 10th resistance other end is separately connected the 232nd capacitor one end and MCU controller front truck headlight signal detection
End, the 232nd capacitor other end connect the 52nd triode source electrode, and the 52nd triode grid is also respectively connected with the 13rd resistance one end and the
14 resistance one end, the 13rd resistance other end connect MCU controller front truck headlight PWM modulation signal end, and the 14th resistance other end connects
Connect MCU controller front truck headlight signal detection end.
6. the vehicle audio according to claim 1 for having automatic control and wireless communication function, which is characterized in that also wrap
Include system power switch circuit；The controller system power switch signal end MCU connects system power switch circuit MCU switching signal
End, system power switch circuit system power end connect system power supply switch terminals, and system power switch circuit power supply end connects
Connect circuit power supply end；
The system power switch circuit includes: the 5th field-effect tube base stage connection MCU controller system power switch signal end,
5th field-effect tube emitter ground connection, the 5th field-effect tube collector connect the 66th resistance one end, and the 66th resistance other end connects respectively
The 91st resistance one end and the 2nd field-effect tube base stage are connect, the 91st resistance other end is separately connected the 2nd field-effect tube emitter and the 79th
Capacitor one end, the 79th capacitor other end ground connection, the 2nd field-effect tube emitter are also connected with circuit power supply end, the 2nd field-effect tube
Collector is separately connected the 68th resistance one end and the 85th capacitor one end, the 68th resistance other end ground connection, the 85th another termination of capacitor
Ground, the 85th capacitor one end are also respectively connected with the 84th capacitor one end and system power supply switch terminals, the 84th capacitor other end ground connection.
7. the vehicle audio according to claim 1 for having automatic control and wireless communication function, which is characterized in that also wrap
Include MCU reset circuit；MCU reset circuit signal end connects MCU controller and resets end, the connection of MCU reset circuit power control terminal
Circuit power end；
The MCU reset circuit includes: that MCU controller resetting end is separately connected the 73rd capacitor one end and resetting chip resetting end,
73rd capacitor other end ground connection, MCU controller resetting end are also connected with the 58th resistance one end, and the 58th resistance other end connects MCU control
Device power supply signal processed end, resetting chip power end are separately connected the 72nd capacitor one end and power supply feeder ear, and the 72nd capacitor is another
One end ground connection.
8. the vehicle audio according to claim 1 for having automatic control and wireless communication function, which is characterized in that also wrap
Include memory；MCU controller store clock signal end connects memory clock signal end, the connection of MCU controller data output end
Memory data input terminal, memory power end connect power supply end；
The memory includes: that power supply end is separately connected the 9th capacitor one end and the 8th capacitor one end, the 9th another termination of capacitor
Ground, the 8th capacitor other end ground connection, power supply end is also connected with storage chip power end and storage communication keeps end, the 12nd resistance
One end connects power supply end, and the 12nd resistance other end connects storage chip write-protect end, and the 9th resistance one end connects the 12nd resistance
One end, the 9th resistance other end are separately connected the chip selection end and MCU controller chip selection end of storage chip, MCU controller
Data input pin connects storage chip data output end.
9. a kind of vehicle audio working method for having automatic control and wireless communication function, which is characterized in that including walking as follows
It is rapid:
S1, vehicle audio are initialized, and the MCU controller of vehicle audio carries out power on operation；
The detection of S2, MCU controller cut-in voltage, judges voltage status detected by MCU controller, if the voltage of detection
Not in normal range value, S3 is executed, if the voltage of detection executes S4 in normal range value；
S3, MCU controller control vehicle audio enter low-power consumption mode；
S4, MCU controller judge whether fired state is opened, if fired state is opened, are directly entered normal mode of operation, such as
The closing of fruit fired state then executes S5；
S5, MCU controller control vehicle audio enter low-power consumption mode, and whether real-time judge user triggers in low-power consumption mode
Be switched on Power key, enters long-time timing mode if triggering is switched on Power key, S6 is executed, if not triggering booting
Power key, then persistently keep low-power consumption mode；
S6, in long-time timing mode process, whether real-time judge user triggers shutdown Power key, if triggering shutdown
Power key then enters short time timing shutdown mode, executes S7, if shutdown Power key is not triggered, when persistently keeping long
Between timing mode, be finished to long-time timing mode, MCU controller control vehicle audio enter low-power consumption mode；
S7, during short time timing mode, whether real-time judge user triggers booting Power key, if triggering booting
Power key then enters long-time timing mode, executes S5, if not triggering booting Power key, persistently keeps the short time fixed
When mode, be finished to short time timing shutdown mode, MCU controller control vehicle audio enter low-power consumption mode.
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| CN109484331B (en) * | 2018-12-17 | 2021-11-02 | 奇瑞汽车股份有限公司 | Intelligent electrical box for automobile cockpit |
| CN110254379A (en) * | 2019-07-09 | 2019-09-20 | 四川朗勃科技有限公司 | Automobile multimedia device, which does not power off, does not restart circuit main board |
| CN111935599B (en) * | 2020-10-10 | 2020-12-25 | 康姆帕斯电子科技衡水有限公司 | Digital power amplifier of vehicle-mounted sound equipment |
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| CN101059755A (en) * | 2006-04-21 | 2007-10-24 | 深圳市航盛电子股份有限公司 | Vehicle-mounted multimedia system for implementing cartoon display and its implementation method |
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