CN207199305U - A kind of portable audio player of playable multi-format source of sound - Google Patents

A kind of portable audio player of playable multi-format source of sound Download PDF

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Publication number
CN207199305U
CN207199305U CN201721015440.XU CN201721015440U CN207199305U CN 207199305 U CN207199305 U CN 207199305U CN 201721015440 U CN201721015440 U CN 201721015440U CN 207199305 U CN207199305 U CN 207199305U
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China
Prior art keywords
module
main control
card
control module
sound
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Expired - Fee Related
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CN201721015440.XU
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Chinese (zh)
Inventor
行鸿彦
李顺
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Nanjing University of Information Science and Technology
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Nanjing University of Information Science and Technology
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Priority to CN201721015440.XU priority Critical patent/CN207199305U/en
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Publication of CN207199305U publication Critical patent/CN207199305U/en
Expired - Fee Related legal-status Critical Current
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Abstract

A kind of portable audio player of playable multi-format source of sound involved by the utility model, including SD card module, system memory module, recording module, touch modules, audio decoder module, LCD MODULE, main control module and power module.SD card module is connected by spi bus with main control module, audio decoder module is connected by spi bus with main control module, liquid crystal screen module is connected by parallel interface with main control module, system memory module is by SPI interface carry on main control module, master control is connected by each interface of opening with each module, coordinate to work between each module, 5V is converted into 3.3V by voltage stabilizing chip for power module and 1.8V provides voltage to corresponding module.Compared with existing audio player, the utility model, which has, can play multi-format source of sound function, high tone quality output, low intermodulation distortion, it is easy to operate the advantages that, and with the lyrics show, record, the function such as browsing file.

Description

A kind of portable audio player of playable multi-format source of sound
Technical field
The utility model belongs to digital product technical field, more particularly to a kind of portable audio of playable multi-format source of sound Frequency player.
Background technology
As the improvement of people's living standards, the musical qualities that people export for portable audio player have it is higher Pursuit, while higher requirement is proposed to the terseness that audio player uses.Especially for the source of sound of different-format The problem of can not being played on same player.
Pursuit to high-quality music so that lossless compressiong is more favored by people, thus using the sound of Lossless Compression Source is also more welcomed by the people.And existing audio player, it is special MP3 player mostly, MP3 and WAV forms can only be played Audio file, the audio file of extended formatting is not supported then, also not supported for the audio file of some Lossless Compressions, this User to numerous MP3 players brings many inconvenience.
The design increases the support to a variety of audio formats, and increase on the premise of making every effort to export high-quality music Sound-recording function.
Utility model content
The problem of in order to overcome support of the common MP3 player to source of sound form more single, the utility model devises one Kind can support the audio player of various tone sources form, and possess sound-recording function.
Technical scheme is as follows:
The system block diagram that can play the portable audio player of multi-format source of sound is as shown in Figure 1:With STM32F103RCT6 is that core forms main control module, and SD card module is connected by spi bus with main control module;Audio decoder mould Block is connected using VS1053B chips as core, by class spi bus with main control module;Four-wire resistance type touch screen and liquid crystal display collection Into together, it is connected by parallel interface with main control module;Other functional modules are all by corresponding interface carry in master control mould On block.Master control is connected by each interface of opening with each module, coordinates to work between each module, power module passes through voltage stabilizing chip 5V is converted into 3.3V and 1.8V provides voltage to corresponding module.SD card module is used for the interface for providing SD card insertion, and user will Audio file is stored in SD cards;The digital independent of SD card is come out according to the operation of user, re-sends to sound by main control module Frequency decoder module;After audio decoder module obtains data, data are decoded, then DAC and amplifying circuit by inside, after amplification Exported from earphone.When using sound-recording function, sound collects voice signal, through inside by the MIC heads on recording module ADC switchs to data signal, stores in SD card, so that user can play recorded audio file at any time.System stores mould Block is used to store Hanzi font library and the use parameter of user, and touch modules are used for man-machine interaction, and LCD MODULE is used for file The presentation of information such as list, playing progress rate, the lyrics.
Beneficial effect
The utility model has the advantages that:User can play the audio file of different-format, including * .mp3, the audio file of the forms such as * .ogg, * .flac, * .wav, * .wma, * .midi, * .acc so that user need not spend again Time removes the form of transducing audio file, also it is unnecessary to play the audio file of a certain form and spend money to buy it in addition His audio player.In addition, the present invention also has sound-recording function, it is user-friendly.
Brief description of the drawings
Fig. 1 system block diagrams;
The internal circuit diagram of Fig. 2 audio decoder modules;
Fig. 3 main control modules and its peripheral circuit diagram;
Fig. 4 Liquid Crystal Modules and its peripheral circuit diagram;
The internal circuit diagram of Fig. 5 power modules.
Embodiment
Below in conjunction with accompanying drawing, concrete technical scheme of the present utility model is further elaborated.
It should be understood that following embodiments are merely to illustrate the utility model rather than limitation model of the present utility model Enclose.The system block diagram of specific embodiment of the present utility model, as shown in figure 1, including the SD card mould for storing audio file Block 1, the system memory module 2 for storing user and systematic parameter, the recording module 3 for recording, for man-machine interaction Touch modules 4, the audio decoder module 5 for being decoded to audio file, the LCD MODULE 6 for display, for coordinating With main control module 7, the power module 8 for being powered to modules of control modules work.Wherein, power module 8 with Modules are connected, and for providing suitable voltage x current to modules, other modules all carries are in main control module 7 On, the work between modules is coordinated by main control module 7.
Fig. 2 is the internal circuit diagram of audio decoder module.The utility model uses VS1053B as audio decoder chip, DAC and ADC is carried inside VS1053B, internal DAC causes the utility model to add extra digital analog converter, internal ADC for using the chip design sound-recording function provide conveniently.VS1053B is connected using spi bus with master control, specifically For, the spi bus that is connected with main control module includes VS MISO, VS MOSI, VS SCK, in addition control line enclosed mass VS XCS, VS XDCS、VS DREQ、VS RST.VS1053B uses standard crystal oscillator of the dominant frequency for 12.288MHz, and the frequency is through VS1053B After frequency dividing, it is easy to play the audio file sampled with 48KHz.The chip directly obtains data flow from main control module, internally Decoding, after the D/A converter of inside, then after internal amplification circuit is amplified, by LEFT, RIGHT, GBUF three-wire output Into earphone.The subsidiary sound-recording function of the utility model, and recorded by the ADC inside VS1053B and encoder come what is realized Sound module 3 is actually a subsidiary module of audio decoder module 5, specifically mainly by electret pick-up and interlock circuit structure Into being connected with VS1053B two pins of MICP, MICN.When using sound-recording function, sound is picked up by electret pick-up Afterwards, data signal is switched to through the ADC inside VS1053B, then after the encoder coding inside VS1053B, by main control chip Dump in SD card.
Fig. 3 is main control module and its peripheral circuit diagram.The main control chip of main control module uses STM32F103RCT6, the core Piece highest dominant frequency reaches 72MHz, meets requirement of the system to speed.STM32F103RCT6 is mainly responsible between coordination modules Work, and the access of data.The peripheral circuit of the main system control module, except crystal oscillator electricity essential to composition minimum system Road, reset circuit, outside power circuit, in addition to SD card interface for SD card insertion and deposited for the system of storage system parameter Store up module.System memory module of the present utility model uses W25Q64 storage chips, and the chip has the memory capacity of 8M bytes, It is mainly used to store Hanzi font library, calibration parameters of touch screen and some other systematic parameter.
Fig. 4 is Liquid Crystal Module and its peripheral circuit diagram.Liquid Crystal Module of the present utility model is using 240*320 pixels TFT liquid crystal, for showing the information such as playing progress rate, listed files, information volume, play mode, the lyrics, frequency.Touch modules 4 It is integrated in LCD MODULE 5 on one piece of circuit board, convenient connection.Touch modules 4 are adopted using chip XPT2046, XPT2046 It is connected with spi bus with STM32F103RCT6, the contact information on resistive film is converted into information of voltage, passed to In STM32F103RCT6, after carrying out digital filtering, judge the position of contact, carry out corresponding operating.The use of touch modules makes It is more convenient to obtain man-machine interaction.
Fig. 5 is the internal circuit diagram of power module.It the utility model is related to two kinds of voltages, a kind of is 3.3V voltage, Another kind is 1.8V voltage.System default externally fed 5V, so use AMS1117-3.3 to provide 3.3V voltages for system, AMS1117-1.8 is used to provide 1.8V voltages for system.When designing power supply, in the input and output side of voltage, all carry out Filtering process, the noise in power supply is removed, obtain more high-quality dc source.

Claims (4)

  1. A kind of 1. portable audio player of playable multi-format source of sound, it is characterised in that SD card module by spi bus with Main control module is connected;Audio decoder module is connected by spi bus with main control module;Four-wire resistance type touch screen and liquid crystal display collection Into together, it is connected by parallel interface with main control module;System memory module is by SPI interface carry on main control module; Master control is connected by each interface of opening with each module, coordinates to work between each module, and power module provides electricity to corresponding module Pressure;
    SD card module is used for the interface for providing SD card insertion, and audio file is stored in SD card by user;Main control module according to The operation at family, the digital independent of SD card is come out, re-send to audio decoder module;It is right after audio decoder module obtains data Data decode, then by internal DAC and amplifying circuit, are exported after amplification from earphone;When using sound-recording function, sound passes through MIC heads on recording module, collect voice signal, through inside ADC switch to data signal, store in SD card, so as to Family plays recorded audio file at any time;System memory module is used to store Hanzi font library and the use parameter of user, touches Module is used for man-machine interaction, and LCD MODULE is used for listed files, playing progress rate, lyrics information and shown.
  2. 2. audio player as claimed in claim 1, it is characterised in that the main control module is STM32F103RCT6.
  3. 3. audio player as claimed in claim 1, it is characterised in that the audio decoder module is VS1053B chips.
  4. 4. audio player as claimed in claim 1, it is characterised in that the power module is changed 5V by voltage stabilizing chip For 3.3V and 1.8V.
CN201721015440.XU 2017-08-14 2017-08-14 A kind of portable audio player of playable multi-format source of sound Expired - Fee Related CN207199305U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721015440.XU CN207199305U (en) 2017-08-14 2017-08-14 A kind of portable audio player of playable multi-format source of sound

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721015440.XU CN207199305U (en) 2017-08-14 2017-08-14 A kind of portable audio player of playable multi-format source of sound

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CN207199305U true CN207199305U (en) 2018-04-06

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107393580A (en) * 2017-08-14 2017-11-24 南京信息工程大学 A kind of portable audio player of playable multi-format source of sound
CN114245270A (en) * 2021-12-10 2022-03-25 深圳市中力能科技有限公司 Automatic voice explanation intelligent earphone circuit for sightseeing of scenic spots

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107393580A (en) * 2017-08-14 2017-11-24 南京信息工程大学 A kind of portable audio player of playable multi-format source of sound
CN114245270A (en) * 2021-12-10 2022-03-25 深圳市中力能科技有限公司 Automatic voice explanation intelligent earphone circuit for sightseeing of scenic spots

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20180406

Termination date: 20190814

CF01 Termination of patent right due to non-payment of annual fee