CN2631845Y - Shockproof loudspeaker device on vehicle - Google Patents
Shockproof loudspeaker device on vehicle Download PDFInfo
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- CN2631845Y CN2631845Y CN 03267563 CN03267563U CN2631845Y CN 2631845 Y CN2631845 Y CN 2631845Y CN 03267563 CN03267563 CN 03267563 CN 03267563 U CN03267563 U CN 03267563U CN 2631845 Y CN2631845 Y CN 2631845Y
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- 238000000034 method Methods 0.000 claims description 55
- 230000008569 process Effects 0.000 claims description 53
- 230000005236 sound signal Effects 0.000 claims description 9
- 230000035939 shock Effects 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 4
- 230000005055 memory storage Effects 0.000 claims description 2
- 239000004973 liquid crystal related substance Substances 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000005540 biological transmission Effects 0.000 description 16
- 238000004891 communication Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000007726 management method Methods 0.000 description 3
- 238000013500 data storage Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
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- 230000004044 response Effects 0.000 description 1
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Abstract
The utility model discloses a shockproof automobile audio device. The automobile audio device comprises a main control module for control all audio equipments of the whole device, wherein the main control module comprises an audio digital-analogue/analogue-digital format conversion and drive module, an audio processor, a USB HOST module with USB interface, a flash memory is used as storage medium of digital audio file for playing digital audio format file. The utility model has the advantages of not being influenced by automobile driving, and can be used as storage medium instead of CD, and can avoid phenomenon of unable to read disk caused by shake during automobile CD player plays.
Description
Technical field
The present invention relates to automotive acoustics, particularly the automotive acoustics of against shock.
Background technology
Along with improving constantly of people's income, car owners' troop grows stronger day by day, and people have got more and more to doting on degree of concern of auto audio equipment.The current host machine part of auto audio equipment on the market is fixed on the automobile more, can not arbitrarily move.The music of CD, MP3 file layouts such as (Audio Layer III) all with CD as storage medium, read the dish machine by CD and play.In the use they to have weak point be that shockproof properties is poor.To imprint CDs as the storage medium of music, advantages such as storage content is big though it has, convenience, cheapness are subjected to the restriction of automobile itself and automobile running condition, and automobile shake under steam causes easily and can't read dish usually, cause the laser head wearing and tearing, even read to coil the device physical damage.For listening to the music itself,, also be very disappointing thing really because thump causes melody intermittent.
Summary of the invention
For the defective of the optical-mechanical storage device shockproof properties difference that solves present automotive acoustics, the objective of the invention is to design the automotive acoustics of an against shock.Another object of the present invention is to provide the manufacture method of the automotive acoustics of this against shock.
In recent years, flash memory technology is popularized gradually, and it as storage medium, does not have mechanical device with electronics, for shockproof natural advantage is arranged.Along with the development of technology, the capacity of flash memory increases gradually, and price reduces gradually, has further promoted the application of flash memory.
Given this, automotive acoustics of the present invention adopts with flash memory and comes replaced C D CD as the storage medium of main digital audio format.
The invention of USB (Universal Serial Bus:USB) interface has been opened up a slice new world in computer realm.Having become very important USB by USB interface extension storage capacity one of uses.USB flash disk has obtained using widely as a kind of application form of flash memory.USB flash disk brings great convenience for the exchanged between equipment file.USB flash disk has the incomparable preceence of floppy disk as a kind of mobile memory, and its capacity is big, and is easy to carry, also becomes popular personal audio amusement equipment in conjunction with the MP3 player.At present, the use of USB flash disk is more and more universal, and its capacity is also increasing.
Because the convenience of the plug and play of USB interface and USB flash disk, popularity, so be a kind of embodiment preferably of the present invention as storage medium with USB flash disk.Use USB interface as the connecting interface between automobile and the USB flash disk.In addition, can also be directly usefulness Smart Media storage card, perhaps Compact Flash storage card etc. is as storage medium.
The automotive acoustics of design-calculated against shock of the present invention, it comprises main control module 1, be used to control all acoustical equipments of whole device, it comprises sound signal digital-to-analogue/modulus format converting module 12, audio process 10, general input and output GPIO interface 14, IIS (Inter-IC Sound) interface 16 is characterized in that:
Described automotive acoustics is the storage medium of digital audio file with the flash memory;
Described main control module 1 also comprises the USB HOST module 13 of being with USB interface, is used to realize the data exchange between USB flash disk 22 and the audio process 10;
Described USB HOST module 13 also comprises RAM 131;
Described audio process 10 comprises RAM 101, is used for the kernel software and the digital audio-frequency data of memory storage operation; Micro-control unit MCU 102 is used to realize the management to each interface logic; Digital signal processing unit DSP 103 is used for various digital audio format decodings.
Described audio process 10 connects USB HOST module 13 by GPIO interface 14, and described audio process 10 connects with sound signal digital-to-analogue/modulus format conversion and driver module 12 by IIS interface 16.
Technical scheme of the present invention specifically describes as follows:
(1) in main control module 1, adds USB HOST module 1, realize usb protocol.
(2) mode of operation of the 102 control USBHOST modules 13 of the micro-control unit MCU in the usefulness audio process 10, and the data among the RAM 131 of USB HOST module 13 are read among the RAM 101 in the audio process 10, or the data among the RAM 101 of audio process 10 are written among the RAM 131 of USB HOST module 13.
(3) MCU 102 in the audio process 10 by with USB HOST module 13 control command passages, USB HOST module 13 is sent read-write operations.USB HOST module 13 is automatically according to USB1.0 agreement (also can select USB1.1 or USB2.0 agreement as required), the data of RAM 131 in the USB HOST module 13 are written in the USB flash disk, or from USB flash disk, read among the RAM 131 that is written to USB HOST module 13.
(4) the digital signal processing unit DSP 103 in the audio process 10 is used for handling the data that are read among the RAM 101, finishes the decoding of the digital audio format that needs.
Purpose of the present invention can also realize by adopting Smart Media (SD) storage card or Compact Flash (CF) storage card to wait: design exterior storage control EMC (External Memory Control) interface 15, by this interface, SD or CF card can insert in this automotive acoustics easily.Control read-write operation with audio process 10 to memory card interface.Be read into the data in the storage card among the RAM 101 in the audio process 10 or among the RAM 101 from audio process 10 read-out information be written in the storage card.
Description of drawings
Fig. 1 is a basic structure block diagram of the present invention;
Fig. 2 is the scheme drawing of the automotive acoustics of the band radio reception of embodiment of the invention against shock and MP3 playing function.
The specific embodiment
Below in conjunction with each accompanying drawing, technical scheme of the present invention is described in further detail:
In automotive acoustics of the present invention, with the method for flash memory, comprise the management process of external flash interface, the management process of flash memory internal file as the digital audio-frequency data storage medium, the communication means of flash interface and audio process, the processing method of car audio.
The present invention relates to the occupation mode of two kinds of flash memories: a kind of is the form that directly adopts flash card, as adopting Smart Media (SD card).Control by exterior storage control EMC (the External Memory Control) interface that audio process directly provides.Another adopts USB flash disk as flash media exactly, communicates by letter with USB flash disk with USB interface.At this moment, audio process is not directly communicated by letter with USB flash disk, but realizes audio process and USB flash disk indirect communication by means of a USB HOST module.
One, the read-write operation of storage medium
1. with the mode of operation of flash card as storage medium
Data exchange between flash card 21 and audio process is to carry out with DMA (DirectMemory Access) form.Between interface, there is not the data bus register.It is to write/read among the audio process internal memory RAM 101 that the control signal wire of EMC interface 15 is used for control signal.
In the time will beginning the flash reading and writing operation, the control register of the EMC in the audio process is set at first.By writing the EMC control register, the type of unlabeled data transmission, the time, the address, and direction etc.After setting control register, then initialization this data transmission, and mode bit will show the transmission whether finish.After transmission was finished, MCU 102 was the reset mode position, or produced a transmission by mode bit and finish interruption.
2. with the mode of operation of USB flash disk as storage medium
Because the USB interface that has in the audio process 10 is generally the equipment end of USB interface, can not be directly and be similarly USB flash disk 22 direct communications of USB slave unit.In order to read the USB flash disk of USB slave unit, must in main control module 1, add a USB HOST module 13.This module is used for managing the communication between audio process 10 and the USB flash disk 22 specially.On the one hand and the USB flash disk swap data, follow the USB interface agreement; On the other hand, communicate by letter with audio process 10, by general input and output (GPIO) interface 14 of main control module 1, address data bus is shared, and also has read-write control line and interrupt response line in addition.
When whole device powers on, 13 initialization of USB HOST module, the open interruption, and the VBUS pin of the USB interface that powers on.When USB flash disk inserts, then USB HOST will produce one and insert interrupt flag bit.Audio signal processor then can determine whether set up with the USB flash disk physical connection by reading this zone bit.After producing the insertion interrupt identification, 13 pairs of usb bus of USB HOST module reset.
1) reads the USB flash disk data
When audio process will be when USB flash disk reads data, audio process must at first be write the control register of USB HOST module 13, tells the data length that USB HOST module 13 needs transmission, is stored in the initial address of the RAM 131 among the HOST, the USB flash disk address.And impel the initial SOF of USB HOST initialization frame (Start of Frame) to transmit.Concrete transmission course can be described below:
A) audio process 10 is write USB HOST module 13 control registers.
B) USB HOST module 13 transmission start bit SOF.
C) RAM 131 that receives data and be stored in USB HOST module 13 specifies in the initial addresses.
D) end of transmission produces end of transmission and interrupts.
E) audio process 10 is read the transmission state register, determines whether wrong generation of transmission.
F) audio process 10 from the RAM 131 of USB HOST module 13 read data in internal RAM.
G) usb bus is hung up.Wait for next operation.
2) write data to USB flash disk
Writing data in the USB flash disk from audio process 10, is an opposite process with read data.But, be the same with read data at the initial period of data transmission.Audio process must be write USB HOST module 13 control registers, tells the length of USB HOST module 13 transmission data, is stored in the initial address among the RAM 131 of USB HOST module 13, the USB flash disk address.Concrete operating process is as described below:
A) audio process is write USB HOST module 13 control registers
B) audio process read data from RAM 101 writes among the RAM 131.
C) data transmission finishes, USB HOST module 13 initialization SOF words.
D) transmit data to USB flash disk from USB HOST module 13 by USB interface.
E) end of transmission produces and finishes interruption.
F) usb bus is hung up, and waits for next operation.
Make communication bridge between USB flash disk and the audio process 10 with USB HOST module, realized the communication protocol of USB, reduced the software burden of audio process 10, also avoided the communication protocol of USB with hardware.
Two, audio frequency is handled
In this PA-system, adopted the buffer zone of RAM 101 as data storage.Each time, to read data handing from RAM 101 just passable for 10 need of audio process.To play the MP3 format music file is example, and the radical function of this audio process 10 is exactly to be the data decompression of MP3 format the raw digital signal form of pcm encoder.This process is finished by the digital signal processing unit (DSP) 103 in the audio process 10.Concrete flow process is as follows:
1) from RAM 101, reads data continuously.
The data of 2) reading in are handled decompress(ion) at DSP 103.
3) Hai Yuan PCM raw digital signal is with the data format output audio treater of IIS.
4) sound signal digital-to-analogue/modulus format conversion and driver module 12 convert the PCM signal of IIS form to analog signal, amplify by analogue audio frequency power amplifier 6, send horn trumpet 5 outputs.
Three, expanded function
This automotive acoustics embodiment is example with the MP3 format, but the present invention is not limited only to MP3 format, owing to adopted USB flash disk as storage medium, the file that can download the diverse network digital audio format very easily on the net is as its main contents, as MP3Pro, WMA, Ogg Vorbis etc. and the following extended formatting that may occur.This modular design can be expanded other structures or function very easily.For example, can add radio receiver in the above, also can add interface controls such as power CD.。
The automotive acoustics band radio receiver of against shock of the present invention as shown in Figure 2 and MP3 playing function.Integrated USB HOST module 13 helps the dilatation of storage medium in this embodiment device.Add USB HUB by USB interface in USB HOST module 13, then can external a plurality of USB devices 22,23,24,25 or the like.USB device (USB flash disk) quantity that drives as the USB HUB that connect can directly directly provide power supply by USB interface not for a long time.
The used main components and parts label of this embodiment, model, effect are as follows:
| | Model | Effect | |
| 10 | ?STMP3410 | Encode to the decoding of MP3 voice data or to original | |
| 13 | ?SL811HS | The USB master controller, control is to the read-write of | |
| 22 | USB flash disk | Store | |
| 12 | ?WM8731 | Modulus/the digital-to-analog converter of band IIS interface |
Obviously, those skilled in the art can carry out various changes and distortion to automotive acoustics of the present invention.If these modifications and distortion belong within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and is out of shape interior.
Claims (5)
1, a kind of automotive acoustics of against shock, it comprises main control module (1), be used to control all acoustical equipments of whole device, this main control module (1) comprises sound signal digital-to-analogue/modulus format conversion and driver module (12), audio process (10), general input and output GPIO interface (14), IIS interface (16) is characterized in that:
Described automotive acoustics is a storage medium of making digital audio file with flash memory;
Described main control module (1) also comprises the USB HOST module (13) of being with USB interface, is used to realize the data exchange between USB flash disk (22) and the audio process (10);
Described USB HOST module (13) comprises RAM (131);
Described audio process (10) comprises RAM (101), is used for the kernel software and the digital audio-frequency data of memory storage operation; Micro-control unit MCU (102) is used to realize the management to each interface logic; Digital signal processing unit DSP (103) is used for various digital audio format decodings;
Described audio process (10) connects USBHOST module (13) by GPIO interface (14), and described audio process (10) connects sound signal digital-to-analogue/modulus format conversion and driver module (12) by IIS interface (16).
2, automotive acoustics as claimed in claim 1, it is characterized in that: described main control module (1) also comprises exterior storage control EMC interface (15), be used for the data exchange between flash card (21) and the audio process (10), described audio process (10) is connected with EMC interface (15).
3, automotive acoustics as claimed in claim 1 or 2, it is characterized in that: described automotive acoustics also comprises main control part button knob (8), Liquid Crystal Display (LCD) LCD (7), analogue audio frequency power amplifier (6) and loudspeaker (5), wherein, described main control part button knob (8) is connected audio process (10) by the GPIO interface (14) of main control module (1) respectively with LCD (7), and described loudspeaker (5), analogue audio frequency power amplifier (6) and sound signal digital-to-analogue/modulus format conversion are connected with driver module (12) preface successively.
4, automotive acoustics as claimed in claim 3, it is characterized in that: described automotive acoustics also comprises radio reception circuit (9), it comprises digital phase-locked loop frequency combiner circuit (91), tunable receiver circuit (92) and audio output (93), wherein digital phase-locked loop frequency combiner circuit (91) connects the GPIO interface (14) of main control module (1), and audio output (93) connects sound signal digital-to-analogue/modulus format conversion and driver module (12).
5, automotive acoustics as claimed in claim 2 is characterized in that: described flash card (21) is to select Smart Media storage card or Compact Flash storage card for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03267563 CN2631845Y (en) | 2003-07-09 | 2003-07-09 | Shockproof loudspeaker device on vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03267563 CN2631845Y (en) | 2003-07-09 | 2003-07-09 | Shockproof loudspeaker device on vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2631845Y true CN2631845Y (en) | 2004-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03267563 Expired - Fee Related CN2631845Y (en) | 2003-07-09 | 2003-07-09 | Shockproof loudspeaker device on vehicle |
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| Country | Link |
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| CN (1) | CN2631845Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113290A (en) * | 2013-04-22 | 2014-10-22 | 恩平市奥新电子科技有限公司 | Professional power amplifier with DSP (digital signal processor) digital speaker processor |
-
2003
- 2003-07-09 CN CN 03267563 patent/CN2631845Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113290A (en) * | 2013-04-22 | 2014-10-22 | 恩平市奥新电子科技有限公司 | Professional power amplifier with DSP (digital signal processor) digital speaker processor |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |