CN201570264U

CN201570264U - Music player

Info

Publication number: CN201570264U
Application number: CN2009202144740U
Authority: CN
Inventors: 丁红
Original assignee: Shanghai Polytechnic University
Current assignee: Shanghai Polytechnic University
Priority date: 2009-11-30
Filing date: 2009-11-30
Publication date: 2010-09-01
Anticipated expiration: 2019-11-30

Abstract

The utility model relates to a music player, which is characterized in that the music player comprises a control module and an audio decoding module connected with the control module, wherein the control module comprises a microprocessor module, a direct memory access module and an internal memory; the audio decoding module is connected with the microprocessor module of the control module; the direct memory access module is connected with the microprocessor module; and the internal memory is respectively connected with the direct memory access module and the microprocessor module. Since the arranged direct memory access module can directly read/write data in the internal memory without the control of the microprocessor module, the data reading/writing speed is increased; based on the serial digital audio bus (IIS) standard, an arranged audio bus can realize double-channel bidirectional data connection with the audio decoding module and the direct memory access module respectively through two groups of data input and output interfaces; and since a key and a touch screen are arranged in an input module, two modes can be provided for parameter setting.

Description

A kind of music player

Technical field

The utility model relates to a kind of music player, particularly a kind of music player based on the ARM3000 development platform.

Background technology

Music player is finished the mode of the common service routine interruption of the data read of audio file at present.The mode of program interrupt needs the request of microprocessor responds program interrupt, ongoing data processor is suspended, make microprocessor begin to carry out the transmission work of audio file, behind DTD, microprocessor is got back to the work of the interruption node continuation data processing of program.Because audio file is bigger usually, so the time of microprocessor transfer audio files data is longer, make interrupted program be can not get response by long-time the hang-up, influence the processing response time of music player, reduce its work efficiency.

The utility model content

The purpose of this utility model is to provide a kind of music player, can shorten the response processing time of each program, improves the speed of voice data read-write.

In order to achieve the above object, the technical solution of the utility model provides a kind of music player, is characterized in, comprises control module, connected audio decoder module; Above-mentioned control module comprises microprocessor module, direct memory access module, internal storage; Above-mentioned audio decoder module is connected with the microprocessor module of control module; Above-mentioned direct memory access module is connected with microprocessor module; Above-mentioned internal storage is connected with direct memory access module, microprocessor module respectively.

Above-mentioned control module also comprises audio-frequency bus, audio-frequency bus control module; Above-mentioned audio-frequency bus control module is connected with microprocessor module, audio-frequency bus; Above-mentioned audio-frequency bus also is connected with above-mentioned audio decoder module.

Above-mentioned music player also comprises load module, and it is connected with the microprocessor module of control module; Above-mentioned load module comprises plurality of keys, touch-screen.

Above-mentioned music player also comprises display module, and it is connected with the microprocessor module of control module.

The utility model music player compared with prior art, its advantage is:

The utility model can directly carry out the data write processing at internal storage not by the control of microprocessor module owing to be provided with the direct memory access module, improves the speed of reading and writing data;

The utility model can realize that with audio decoder module, direct memory access module twin-channel bi-directional data is connected respectively with data output interface IISDO by two groups of Data Input Interface IISDI because the audio-frequency bus that is provided with uses serial digital audio-frequency bus (IIS) standard;

The utility model can provide dual mode to carry out audio file and select, plays, stops isoparametric setting owing to be provided with button and touch-screen at load module.

Description of drawings

Fig. 1 is the general structure block diagram of the utility model music player.

Embodiment

Below in conjunction with description of drawings embodiment of the present utility model.

See also shown in Figure 1ly, the utility model music player comprises control module 10, respectively connected audio decoder module 20, load module 30, display module 40.

Control module 10 is S3C44B0X microprocessor chips of Samsung.Control module 10 comprises microprocessor module 11, direct memory access module 12, audio-frequency bus 13, audio-frequency bus control module 14, internal storage 15.

Audio-frequency bus control module 14 is connected with the control signal interface of microprocessor module 11, audio-frequency bus 13 respectively.Microprocessor module 11 sends control signal, inputs or outputs voice data by audio-frequency bus control module 14 control audio buses 13.

Audio-frequency bus 13 uses serial digital audio-frequency bus (IIS) standard, is connected with audio decoder module 20, direct memory access module 12 respectively with data output interface IISDO by two groups of Data Input Interface IISDI, realizes twin-channel bidirectional data transfers.Audio-frequency bus 13 will output to audio decoder module 20 from the voice data that direct memory access module 12 is obtained, or the voice data of audio decoder module 20 typings is exported to direct memory access module 12.

Direct memory access module 12 also is connected with internal storage 15, microprocessor module 11 respectively.Direct memory access module 12 is sent direct memory access request (DMA) to micro treatment module 11, after obtaining the permission request of microprocessor module 11, direct memory access module 12 can directly be carried out data write at internal storage 15 and handle not by the control of microprocessor module 11.

Audio decoder module 20 is audio chips of UDA1341TS, be connected with audio-frequency bus 13 by the one group of audio bus interface that is provided with, be connected by the control signal interface with the microprocessor module 11 of control module 10, also be connected with microphone with the loudspeaker of outside respectively.Microprocessor module 11 is exported to audio decoder module 20 with digital audio processing parameter and system control parameters, 20 decodings of control audio decoder module are exported from the DAB of audio-frequency bus 13 transmission, or the voice signal of outside typing is transferred to audio-frequency bus 13 afterwards through analog to digital conversion and coding.

Load module 30 is connected with the microprocessor module 11 of control module 10, carries out audio file by the button that is provided with and touch-screen and selects, plays, stops isoparametric setting.

Display module 40 is LCDs, and it is connected with the microprocessor module 11 of control module 10.Microprocessor module 11 obtains filename, the author information of audio file from coupled internal storage 15, and correlation parameter data such as control, broadcast interface are in the LCDs output of display module 40.

Although content of the present utility model has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.After those skilled in the art have read foregoing, for multiple modification of the present utility model with to substitute all will be conspicuous.Therefore, protection domain of the present utility model should be limited to the appended claims.

Claims

1. a music player is characterized in that, comprises control module (10), connected audio decoder module (20);

Described control module (10) comprises microprocessor module (11), direct memory access module (12), internal storage (15);

Described audio decoder module (20) is connected with the microprocessor module (11) of control module (10);

Described direct memory access module (12) is connected with microprocessor module (11);

Described internal storage (15) is connected with direct memory access module (12), microprocessor module (11) respectively.

2. music player as claimed in claim 1 is characterized in that, described control module (10) also comprises audio-frequency bus (13), audio-frequency bus control module (14); Described audio-frequency bus control module (14) is connected with microprocessor module (11), audio-frequency bus (13); Described audio-frequency bus (13) also is connected with described audio decoder module (20).

3. music player as claimed in claim 1 is characterized in that, also comprises load module (30), and it is connected with the microprocessor module (11) of control module (10); Described load module (11) comprises plurality of keys, touch-screen.

4. music player as claimed in claim 1 is characterized in that, also comprises display module (40), and it is connected with the microprocessor module (11) of control module (10).