CN1971544A - Second development board of audio video control options of MPU based on audio video embedded development platform - Google Patents
Second development board of audio video control options of MPU based on audio video embedded development platform Download PDFInfo
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Abstract
The invention relates to a microprocessor audio and video frequency controlling option secondary develop board based on the video and audio frequency embedded developing platform, it includes: a video frequency embedded developing platform, the developing platform standard system bus module of the said video and audio frequency embedded developing platform is connected with the microprocessor audio and video frequency controlling option secondary develop board by the SRDU interface to manage the video processing timely, generate the video frequency standard code flow, transmit and store, it's an efficient digital video and audio frequency embedded system studying and designing platform.
Description
Technical field
The present invention relates to a kind of microprocessor audio frequency and video control option secondary development plate based on embedded platform for developing audio and video, embedded platform for developing audio and video based on special use, realization is handled at real-time video, the audio standard code stream generates, transmission and memory function, embedded platform for developing audio and video among the present invention has perfect video, audio frequency and various data communication interface, be with 15 cun LCDs, microprocessor audio frequency and video control option among the present invention, it is the secondary development plate that utilizes the standard system bus realization of embedded platform for developing audio and video, this system has realized the complete audio digital signals processing procedure of looking, and is the embedded system study of an effective digital video-audio technology and the platform of design.
Background technology
The digital video-audio industry has data prediction as one of great ingredient of electronics and information industry, and by 2008, Chinese digital video-audio industry annual value of production will reach 9,000 hundred million yuan, surpasses communications industry and leaps to the information industry first place; And by 2010, look the audio frequency industry and will reach 1.5 trillion yuan, become the first pillar of national economy; Simultaneously, because the embedded system function is progressively powerful, the processing speed of traditional microcontroller (MCU) has not caught up with the requirement of development, microprocessor begins rejuvenation and development, the application of microprocessor makes embedded OS become possibility, the introducing of operating system with the writing, upgrade and transplant greatly and to simplify of software, has also increased the reliability of system again simultaneously.
Present various embedded system development plates, be based on the learning board of more low-grade processor chips, can only do some simple programming study, can't look the audio frequency exploitation, if the learning board of high-grade processor chips based on the comparison, then interface is all abundant inadequately, video particularly, audio interface especially lacks, the user also can only carry out related software study, hardware is not supported user's secondary development, the Large-size LCD Screen that does not also provide simultaneously video to show usefulness, these defectives make these development boards can't realize specific Embedded System Design and the study of handling at video/audio signal.
Investigate according to coordinate indexing, at present in colleges and universities' course, the content relevant with modern video and audio frequency technology applications is fewer, and corresponding practice course lacks more, in addition, science and technology class company is in the R﹠D process of digital video audio product, and the reusability of hardware platform is very low, is unfavorable for the quick research and development listing of Product Cost Control and product.Development of technologies, no matter cultivate from the practice and the manipulative ability of college student, still the aspect such as constantly weed out the old and bring forth the new of product in the scientific ﹠ technical corporation, all require us can develop along with the development of technology at the method for designing and the design level of digital video audio system design aspect, and can in time release the platform of the embedded system study and the design of an effective digital video-audio technology, realize the complete audio digital signals processing procedure of looking.
Summary of the invention
The defective and the real needs that the objective of the invention is to exist at prior art provide a kind of microprocessor audio frequency and video control option secondary development plate based on embedded platform for developing audio and video, having the real-time video of realization handles, the generation of audio standard code stream, transmission and memory function are effective digital video-audio embedded system study and design platform.For achieving the above object, design of the present invention is: the embedded platform for developing audio and video among the present invention has perfect video, audio frequency and various data communication interface, be with 15 cun LCDs, can be used as digital video Audio Processing experiment porch, finish multiple audio frequency experiment or the teaching demonstration function of looking, secondly can utilize development platform standard system bus and the rich data communication interface open to the user, carry out the secondary development of digital video audio embedded type system, in addition, can also utilize the programmable features of this platform, on the basis that does not change hardware, carry out special-purpose embedded software developing or look the prototype design work of audio product; Microprocessor audio frequency and video control option among the present invention is the secondary development plate that utilizes the standard system bus realization of embedded platform for developing audio and video, realizes the real-time video processing, the generation of audio standard code stream, transmission and memory function.Embedded platform for developing audio and video among the present invention adopts field programmable gate function (FPGA) as development platform master control core, and implanted the soft nuclear management system of NiosII, its programmability has improved the tailorability of system, reduced system development costs, the audio interface of looking that platform is perfect provides signal source for user's secondary development, 15 cun LCD can satisfy the requirement that high definition video shows, development platform standard system bus interface is supported the embedded system secondary development of user based on this platform, makes this platform have great adaptability and high performance price ratio; Microprocessor audio frequency and video control option among the present invention, the ARM chip that adopts Samsung is as the main control core, and transplanted uCOS operating system, be used for dispatching all plate level tasks, adopt option standard system bus and special-purpose embedded platform for developing audio and video to carry out supporting, level of integrated system and reliability have been improved, and utilize Ethernet, communication mode such as USB and serial ports is realized the remote transmission and the system management of data, the standard system bus of this option solves this option encoded signals source and decoding rear video by being connected with embedded platform for developing audio and video, problems such as sound signal broadcast.External ethernet interface module and usb interface module provide the standard channel of information transmission, and system remote control channel also is provided, and have improved the extensibility and general adaptability of system.
According to above-mentioned inventive concept, the present invention adopts following technical proposals:
A kind of microprocessor audio frequency and video control option secondary development plate based on embedded platform for developing audio and video, comprise an embedded platform for developing audio and video, it is characterized in that the development platform standard system bus module of described embedded platform for developing audio and video connects a microprocessor audio frequency and video control option secondary development plate by the SRDU interface.
Above-mentioned microprocessor audio frequency and video control option secondary development plate, comprise the common store module, the option main system control module, option system Co-processor Module, usb interface module, ethernet interface module and option standard system bus module, the various video that secondary development plate option is handled, audio frequency, control and other data messages all pass through option standard system bus module and are connected with supporting embedded platform for developing audio and video, adopt the control core of SAMSUNG S3C44B0X01 chip as system master molding piece, the option main system control module respectively with the common store module, option system Co-processor Module, usb interface module, ethernet interface module and option standard system bus module, option standard system bus module respectively with development platform standard system bus module, the option main system control module, option system Co-processor Module, usb interface module links to each other with ethernet interface module.The core control part that the core component that adopts the option main system control module to handle as system data is handled as system data, ARM chip is wherein supported multiple task operating system, can support uCOS, real time operating systems such as uCLinux, combine with the common store module, support program storage and data storage, constitute basic embedded system, its multitask can be divided into vision operation part and audio operation part, the vision operation part, the ARM microprocessor will be controlled the real time video data that obtains on the option standard system bus of CPLD Co-processor Module at 160 pins, carry out multiple processing operation, and the processed images data are returned the option standard system bus of 160 pins, show by embedded platform for developing audio and video, the audio operation part, the realaudio data that the ARM microprocessor obtains on will the option standard system bus at 160 pins, carry out multiple processing, voice data can be stored in FIFO in the sheet, or store the SDRAM data storage part of common store module into, the voice data of handling can return embedded platform for developing audio and video by the standard system bus of 160 pins, by the output of decoding of the audio decoder chip of embedded platform for developing audio and video, adopt the ethernet interface module and the usb interface module of option configuration, by the option standard system bus, support data the real-time remote transmission and with the data communication and the remote system administration of peripheral hardware.
Above-mentioned option main system control module links to each other with the common store module by the DAC interface, by Ctrl, DATA interface and option system Co-processor Module, link to each other with usb interface module by the UDAC interface, link to each other with ethernet interface module by the EDAC interface, link to each other with option standard system bus module by UART, IIC and ADB interface, form complete audio frequency and video treatment channel.
Above-mentioned option standard system bus module is passed through UART, IIC and ADB interface link to each other with the option main system control module, pass through GPIOB, VDB and VDctrl interface link to each other with option system Co-processor Module, link to each other with usb interface module by the UIB interface, link to each other with ethernet interface module by the EIB interface, link to each other with development platform standard system bus module by the SRDU interface, form the signal input of this system, output channel, and remote data transmission and management channels, the option STD bus is obtained video by the SRDU interface from the development platform STD bus, audio frequency, control, serial communication and other data messages.
Above-mentioned common store module adopts AM29LV320DB FLASH and HY67V641620HG SDRAM pin-saving chip.
Above-mentioned option main system control module adopts SAMSUNG S3C44B0X01 chip as system's major control chip.
The above-mentioned option Co-processor Module employing MAX CPLD of system chip EPM3256ATC144 assists process chip as system.
Above-mentioned usb interface module adopts PDIUSBD12 USB access control chip.
Above-mentioned ethernet interface module adopts RTL8019AS Ethernet multimedia visit control chip.Above-mentioned option standard system bus module adopts the gauge pin of double 160 pins, embeds the standard socket of looking development platform and is connected with the supporting audio frequency of looking by the SRDU interface.
Above-mentioned embedded platform for developing audio and video, comprise development platform main control module, difference video signal generation and handover module, development platform standard system bus module, communication module, display module, video input module and audio frequency input/output module composition, the system integration perfect video, audio frequency, demonstration and other communication interfaces, the development platform standard system bus is opened to the user, supports secondary development; Adopt main control module and standard system bus core as platform, development platform standard system bus module links to each other with handover module, communication module, video input module, audio frequency input/output module and option standard system bus module with development platform main control module, difference video signal generation respectively, and difference video signal generates and links to each other with display module with development platform main control module, development platform standard system bus module respectively with handover module; Adopt the core of field programmable gate function (FPGA) chip, support the soft renucleation of NiosII, external multiple memory chip of while, support program storage, data storage and buffering as the development platform main control module; Adopt the development platform standard system bus of 160 pins, open to the user, support digital video voicefrequency circuit embedded system secondary development based on this platform, platform is supported various video audio interface and external communication interface; Adopt low voltage, high-speed difference (LVDS) video signal transmission mode, reduced the video interference, be supported in real-time display video image on 15 cun LCD in the display module.
Above-mentioned development platform standard system bus module links to each other with the development platform main control module by the DAV interface, link to each other with handover module with the difference video signal generation by the LVDS interface, link to each other with communication module by the CMB interface, link to each other with video input module by the DV interface, link to each other with the audio frequency input/output module by the DAB interface, link to each other with option standard system bus module by the SRDU interface, formed the complete video of this platform, audio frequency and various outbound data communication interface, the development platform standard system bus is open fully to the user, supports the user to be undertaken developing based on the secondary embedded system option of this platform by the SRDU interface.
Above-mentioned difference video signal generates and links to each other with the development platform main control module by the VoC interface with handover module, link to each other with development platform standard system bus module by the LVDS interface, link to each other with display module by the LVDS interface, formed signal Processing, storage and the display channel of this platform.
It is main control chip that above-mentioned development platform main control module adopts large-scale F PGA chip EP1C6Q240C8; Described difference video signal generates with handover module and adopts DS90C385 difference video to generate chip, adopts DS90CP22 difference video switch chip; Described development platform standard system bus module adopts the standard socket of double 160 pins; Described video input module adopts the SAA7111 video decoding chip, supports the input of two-way analog video signal, the input of one road S terminal component video signal; Described audio frequency input/output module adopts the CS4297 audio coding decoding chip that meets AC ' 97 audio standards, supports the input of No. one microphone, a route input, a route output, the output of one road S/PDIF standard audio; Described display module adopts 15 cun LCD; Described communication module comprises serial interface, USB interface, Ethernet interface and keyboard interface.
The present invention compares with existing correlation technique, has following conspicuous outstanding substantive distinguishing features and remarkable advantage:
The characteristics of embedded platform for developing audio and video and advantage:
1, supports multiple format video signal input, the output that the user is controlled and showing, for system and user's secondary development provides perfect video signal source.2, support the sound signal input and output of AC ' 97 audio standard signals, for system and user's secondary development provides perfect audio signal source.3, support multiple storer such as CF card, memory capacity is big, can plug, with the PC interface compatibility.4, the development platform standard system bus is open to the user fully, and video, audio frequency and other data communication interfaces are provided, and for user's secondary development provides unified interface standard, disposes easy.5,15 cun high definition liquid crystal displays are for the exploitation of system and user's secondary video provides perfect display channel.6, support multichannel difference (LVDS) vision signal to generate, transmit, switch and show, guaranteed the sharpness of vision signal.
The characteristics and the advantage of microprocessor audio frequency and video control option:
1, this option obtains the video/audio signal source by the standard system bus of special-purpose embedded platform for developing audio and video, the design of hardware circuit meets special-purpose embedded platform for developing audio and video user secondary development standard, and the signal of option output simultaneously also realizes by the standard system bus of special-purpose embedded platform for developing audio and video.2, main control chip adopts SAMSUNG S3C44B0X01 chip, supports the implantation of several operation systems, combines with the common store module, and support program storage and data storage constitute basic embedded system.3, adopt the vision signal Co-processor Module of CPLD as this option, the control ability that has made full use of microprocessor is closed the processing power 4 of CPLD, is adopted the embedded audio processing modules audio signal of ARM, demonstrated fully microprocessor processing power 5, utilize communication modes such as Ethernet, USB and serial ports to realize the remote transmission and the system management of system datas.
Description of drawings
Fig. 1 is a system global structure block diagram of the present invention.
Fig. 2 is an embedded platform for developing audio and video main control module structured flowchart.
Fig. 3 is that the embedded platform for developing audio and video difference video signal generates and the handover module structured flowchart.
Fig. 4 is the main system control module structured flowchart of microprocessor audio frequency and video control option secondary development plate.
Fig. 5 is system's Co-processor Module structured flowchart of microprocessor audio frequency and video control option secondary development plate.
Embodiment
Details are as follows in conjunction with the accompanying drawings for a preferred embodiment of the present invention:
This based on the system global structure block diagram of microprocessor audio frequency and video of embedded platform for developing audio and video control option secondary development plate as shown in Figure 1, comprise an embedded platform for developing audio and video 15, development platform standard system bus module 8 wherein connects a microprocessor audio frequency and video control option secondary development plate 1 by the SRDV interface.
Overall system is generated with handover module 12, development platform standard system bus module 8, communication module 13, display module 14, video input module 9, audio frequency input/output module 10, common store module 2, option main system control module 3, option system Co-processor Module 4, usb interface module 5, ethernet interface module 6 and option standard system bus module 7 by development platform main control module 11, difference video signal to be formed.Realize the function difference according to system, can be divided into two major parts, video processing part and Audio Processing part, and the Audio Processing part can be divided into two processes, the first audio storage process, the second Audio Processing replayed section.
Video processing part, mainly be treated to the master to lead directly to, do some feasible Flame Image Process experiments simultaneously, with development platform standard system bus module 8 and option standard system bus module 7 is core, and development platform standard system bus module 8 links to each other with development platform main control module 11 by the DAV interface; Development platform standard system bus module 8 generates with difference video signal by the LVDS interface and links to each other with handover module 12; Development platform standard system bus module 8 links to each other with communication module 13 by the CMB interface; Development platform standard system bus module 8 links to each other with video input module 9 by the DV interface; Development platform standard system bus module 8 links to each other with audio frequency input/output module 10 by the DAB interface; Development platform standard system bus module 8 links to each other with the option standard system bus module 7 of secondary development plate by the SRDU interface; Formed complete video, audio frequency and the various outbound data communication interface of this platform, the development platform standard system bus is open fully to the user, supports the user to be undertaken developing based on the secondary embedded system option of this platform by the SRDU interface; Option standard system bus module 7 links to each other with option main system control module 3 by UART, IIC and ADB interface; Option standard system bus module 7 links to each other with option system Co-processor Module 4 by GPIOB, VDB and VDctrl interface; Option standard system bus module 7 links to each other with usb interface module 5 by the UIB interface; Option standard system bus module 7 links to each other with ethernet interface module 6 by the EIB interface; Option standard system bus module 7 links to each other with development platform standard system bus module 8 by the SRDU interface, signal input, the output channel of forming this option system, and remote data transmission and management channels, the option STD bus is obtained video, audio frequency, control, serial communication and other data messages by the SRDU interface from the development platform STD bus.Development platform standard system bus module 8 on the embedded platform for developing audio and video provides real-time digital video signal to the option main system control module 3 of microprocessor audio frequency and video control option under the control of development platform main control module 11, handle in real time through the CPLD in the option system Co-processor Module 4 by option main system control module 3 control figure vision signals, the content user of handling can be self-defined in program as required, digital video signal is after treatment exported to embedded platform for developing audio and video by the option standard system bus module 7 of microprocessor audio frequency and video control option, utilize display module 14 real-time play on the embedded platform for developing audio and video then, realize the function that the realtime graphic processing is play.
The Audio Processing part, the audio storage process serves as to handle core with option main system control module 3 mainly, the DAB and other data message that provide with the development platform standard system bus module 8 on the embedded platform for developing audio and video are signal source, option main system control module 3 links to each other with common store module 2 by the DAC interface, option main system control module 3 passes through Ctrl, DATA interface and option system Co-processor Module 4, option main system control module 3 links to each other with usb interface module 5 by the UDAC interface, option main system control module 3 links to each other with ethernet interface module 6 by the EDAC interface, option main system control module 3 passes through UART, IIC and ADB interface link to each other with option standard system bus module 7, form complete audio frequency and video treatment channel, microprocessor audio frequency and video control option is by option standard system bus module 7, obtain audio frequency and other data message of standard format from embedded platform for developing audio and video, signal source as the standard code stream, the necessary control instruction also is provided simultaneously, as the control channel of the master control ARM chip in the option system control module to signal source, S3C44B0X01ARM chip in the option main system control module obtains audio signal source by the ADB interface from option standard system bus module 7, IIS interface by self deposits ARM chip internal FIFO in, scheduling by embedded OS control audio data processing task, the execution voice data is handled, deposit data processed in SDRAM by the DAC interface by CPU control, the voice data that deposits in can be carried out transformation task by operating system scheduling, voice data is imported into platform network interface module 6 by the EDAC interface, be transferred to other equipment by cable network, perhaps utilize usb interface module 5 to carry out data transmission by USB port by the UDAC interface, these two kinds of communication modes also can be used as the telemanagement passage of system simultaneously, execution is to the control and management of CPU, audio playback process serves as to handle core with option main system control module 3 mainly, DAB and other data message are provided and realize real-time play by the audio frequency input/output module 10 of option standard system bus module 7 on embedded platform for developing audio and video, option main system control module 3 links to each other with common store module 2 by the DAC interface, option main system control module 3 passes through Ctrl, DATA interface and option system Co-processor Module 4, option main system control module 3 links to each other with usb interface module 5 by the UDAC interface, option main system control module 3 links to each other with ethernet interface module 6 by the EDAC interface, option main system control module 3 passes through UART, IIC and ADB interface link to each other with option standard system bus module 7, form complete audio frequency and video treatment channel, option main system control module 3 is imported into the data among the SDRAM in the common store module 2 among the FIFO in the embedded audio-frequency module of ARM by operating system control and goes, output to the ADB interface by ARM control again, by option standard system bus module 7, be input to audio frequency input/output module 10 on the embedded platform for developing audio and video through the SRDU interface, by the microphone output sound, voice data also can be imported data to ethernet interface module 6 by network interface by miscellaneous equipment simultaneously, or by miscellaneous equipment by USB interface input data to usb interface module 5, send into option main system control module 3 by EDAC interface or UDAC interface, by ARM data are sent among the FIFO in its embedded audio-frequency module again, output to the ADB interface by ARM control then, by option standard system bus module 7, be input to audio frequency input/output module 10 on the embedded platform for developing audio and video through the SRDU interface, by the microphone output sound, handle like this and made full use of existing module on the embedded platform for developing audio and video, demonstrated fully the data transmission capabilities of network interface and USB port.
Development platform main control module 11 as shown in Figure 2, master control fpga chip 17 adopts the EP1C6Q240C8 chips, inside comprises 5980 logical blocks, supports the soft renucleation of NiosII.EP1C6Q240C8 links to each other with development platform standard system bus module 8 by the DAV interface, reception is from the digital video on the standard system bus, audio frequency and other data message, and carry out related data according to user's program definition and handle, generate and handover module 12 to difference video signal by VoC interface output processed video data then, carry out the generation of difference video signal; The EP1C6Q240C8 exterior arrangement FLASH storer A19, hardware configuration program that both can storage system also can be stored the executable file in the soft nuclear of NiosII, can also store other user data simultaneously; SRAM storer 20 is as the running environment of executable file in the soft nuclear of NiosII; SDRAM storer A18 is as the buffer memory of video, audio frequency and other data message; CF card memory 16 can be stored real-time video, audio frequency or other data messages, convenient plug, and direct browsing content on PC.Design like this, both solved the high speed processing problem of a large amount of real-time video voice datas in the system, also can utilize abundant peripheral memory, real time data is stored and cushioned, and can display the play in real time with handover module 12 by the difference video signal generation, finished input, processing, storage and the Presentation Function of video/audio signal.
Difference video signal generation and handover module 12 are as shown in Figure 3, adopted the generation module of DS90C385 chip 22 as difference video signal, DS90C385 allows to convert 24 rgb video signals to the LVDS differential signal, be output as the LVDS signal in five-way road, chip is supported the video rgb signal of 85MHz, per 7 signals generate one road LVDS signal, therefore each channel rate is 595Mbps, total data throughout is 297.5Mbytes/ second, the video signal format that adopts in the native system is RGB565, data rate has only 13.5MHz, therefore each LVDS differential signal channel is 94.5Mbps, totally four LVDS signal output channels, total data throughout is 47.25Mbytes/ second; Adopt special-purpose VGA conversion LVDS difference video signal plate 21, the VGA conversion of signals that the outside is directly imported becomes the LVDS difference video signal; Adopt the handover module of DS90CP22 chip 23 as difference video signal, DS90CP22 is that the dual-channel LVDS differential signal switches chip, shared four DS90CP22 chips in system, be used for switching the two-way LVDS difference video signal that generates chip DS90C38522 and special-purpose VGA commentaries on classics LVDS signal plate 21 respectively from difference video signal, the difference video signal that switches output can be got back to development platform standard system bus module 8, also can output to display module 14 and directly show.
Option main system control module 3 as shown in Figure 4, option system primary processor 25 adopts the SAMSUNGS3C44B0X01 chip, this ARM chip is examined based on ARM7TDMI CPU, adopt 16/32 RISC order set, highest point reason frequency can reach 66MHz, integrated IIC, IIS, multiple peripheral hardware such as UART and SIO, can implant multiple embedded OS, S3C44B0X01 passes through UART, IIC links to each other with option standard system bus module 7 with the ADB interface, reception is from the digital audio and video signals on the system bus, the various signals of IIC and UART communication port, option system primary processor is according to user's needs, above various signals are handled accordingly, can deliver to ethernet interface module 6 or usb interface module 5 transmits by EDAC or UDAC interface then, or directly return embedded platform for developing audio and video output and play by the ADB interface, S3C44B0X01 carries out processing to picture signal by Ctrl interface control option system coprocessor CPLD26, simultaneously can carry out some exchanges data by the DATA interface, the S3C44B0X01 exterior arrangement FLASH storer B27 be used as program storage, application storing and embedded OS, the S3C44B0X01 outside has also disposed SDRAM storer B24 and has been used as data-carrier store, operational data during the storage system operation, perhaps also can be used as program storage, routine data among the FLASH storer B27 copied among the SDRAM storer B24 move, can the faster procedure travelling speed.
Option system Co-processor Module 4 as shown in Figure 5, option system coprocessor CPLD26 adopts MAX CPLD chip EPM3256ATC144, contain 116 general purpose I/O pin, contain 256 d type flip flops, the input of 27M clock, can be to doing real-time processing from the data image signal of option standard system bus module 7, EPM3256ATC144 links to each other with option system primary processor 25 by DATA and Ctrl interface, EPM3256ATC144 passes through GPIOB, VDB links to each other with option standard system bus interface 7 with the VDctrl interface, EPM3256ATC144 passes through GPIOB, VDB and VDctrl interface receive from digital video signal on the system bus and corresponding video control signal, EPM3256ATC144 is by the control information of Ctrl interface reception from option system primary processor 25, do corresponding Flame Image Process according to different control informations, the processed images data are passed through GPIOB again, VDB and VDctrl interface return the embedded platform for developing audio and video real-time play by option standard system bus module 7, EPM3256ATC144 carries out some data transmission by DATA interface and option system primary processor 25 simultaneously, option system coprocessor CPLD26 can also directly produce picture signal, as colour bar, test signals such as grid, by GPIOB, VDB and VDctrl interface return embedded platform for developing audio and video by option standard system bus module 7 and play demonstration, the audio frequency and video passage of microprocessor audio frequency and video control option secondary development plate is isolated fully, has made full use of the speciality of dealing with device separately.
The microprocessor audio frequency and video control option secondary development plate based on embedded platform for developing audio and video of present embodiment, embedded platform for developing audio and video based on special use, realization is at real-time video, the processing of sound signal, storage and transmission, ARM and CPLD finish the processing to Voice ﹠ Video separately, utilize supporting with it embedded platform for developing audio and video to provide signal source and video display interface and audio interface to display the play, level of integrated system and reliability have been improved, external ethernet interface module and usb interface module provide the standard channel of information transmission, system remote control channel also is provided, and has increased the extensibility and general adaptability of system.
Here by the reference specific embodiment the present invention is described in detail, but this is an applicating example, should knows that those of ordinary skill in the art can make various modifications and variations under situation about not departing from the scope and spirit of the present invention.
Claims (9)
1, a kind of microprocessor audio frequency and video control option secondary development plate based on embedded platform for developing audio and video, comprise an embedded platform for developing audio and video (15), it is characterized in that the development platform standard system bus module (8) of described embedded platform for developing audio and video (15) connects a microprocessor audio frequency and video control option secondary development plate (1) by the SRDU interface.
2, according to claim 1 described microprocessor audio frequency and video control option secondary development plate based on embedded platform for developing audio and video, it is characterized in that described microprocessor audio frequency and video control option secondary development plates (1) are by common store module (2), option main system control module (3), option system Co-processor Module (4), usb interface module (5), ethernet interface module (6) and option standard system bus module (7) constitute, the video that secondary development plate option is handled, audio frequency, control and other data messages all pass through option standard system bus module (7) and are connected with supporting embedded platform for developing audio and video, adopt the control core of SAMSUNG S3C44B0X01 chip as option main system control module (3), option main system control module (3) respectively with common store module (2), option system Co-processor Module (4), usb interface module (5), ethernet interface module (6) links to each other with option standard system bus module (7), option standard system bus module (7) respectively with development platform standard system bus module (8), option main system control module (3), option system Co-processor Module (4), usb interface module (5) links to each other with ethernet interface module (6); The core control part that adopts option main system control module (3) to handle as system data, ARM chip is wherein supported multiple task operating system, can support uCOS, the uCLinux real time operating system, combine with the common store module, support program storage and data storage, constitute basic embedded system, its multitask is divided into vision operation part and audio operation part, the vision operation part, the ARM microprocessor will be controlled the real time video data that obtains on the option standard system bus of CPLD Co-processor Module (4) at 160 pins, carry out multiple processing operation, and the processed images data are returned the option standard system bus of 160 pins, show by embedded platform for developing audio and video, the audio operation part, the realaudio data that the ARM microprocessor obtains on will the option standard system bus at 160 pins, carry out multiple processing, voice data can be stored in FIFO in the sheet, or store the SDRAM data storage part of common store module into, the voice data of handling can return embedded platform for developing audio and video by the standard system bus of 160 pins, by the output of decoding of the audio decoder chip of embedded platform for developing audio and video, adopt the ethernet interface module (6) and the usb interface module (5) of option configuration, by the option standard system bus, support data the real-time remote transmission and with the data communication and the remote system administration of peripheral hardware.
3, microprocessor audio frequency and video control option secondary development plate based on embedded platform for developing audio and video according to claim 2, it is characterized in that described option main system control module (3) links to each other with common store module (2) by the DAC interface, pass through Ctrl, the DATA interface links to each other with option system Co-processor Module (4), link to each other with usb interface module (5) by the UDAC interface, link to each other with ethernet interface module (6) by the EDAC interface, pass through UART, IIC and ADB interface link to each other with option standard system bus module (7), form complete audio frequency and video treatment channel.
4, microprocessor audio frequency and video control option secondary development plate based on embedded platform for developing audio and video according to claim 3, it is characterized in that described option standard system bus module (7) passes through UART, IIC and ADB interface link to each other with option main system control module (3), pass through GPIOB, VDB and VDctrl interface link to each other with option system Co-processor Module (4), link to each other with usb interface module (5) by the UIB interface, link to each other with ethernet interface module (6) by the EIB interface, link to each other with development platform standard system bus module (8) by the SRDU interface, form the signal input of this system, output channel, and remote data transmission and management channels, the option STD bus is obtained video by the SRDU interface from the development platform STD bus, audio frequency, control, serial communication and other data messages.
5, the microprocessor audio frequency and video control option secondary development plate based on embedded platform for developing audio and video according to claim 2 is characterized in that described common store module (2) adopts AM29LV320DB FLASH and HY67V641620HG SDRAM pin-saving chip; Described option main system control module (3) adopts SAMSUNG S3C44B0X01 chip as system's major control chip; Described option system's Co-processor Module (4) adopts MAX CPLD chip EPM3256ATC144 to assist process chip as system; Described usb interface module (5) adopts PDIUSBD12 USB access control chip; Described ethernet interface module (6) adopts RTL8019AS Ethernet multimedia visit control chip; Described option standard system bus module (7) adopts the gauge pin of double 160 pins, looks the audio frequency embedding and looks the standard socket of development platform and be connected with supporting by the SRDU interface.
6, microprocessor audio frequency and video control option secondary development plate based on embedded platform for developing audio and video according to claim 1, it is characterized in that described embedded platform for developing audio and video (15) is by development platform main control module (11), difference video signal generates and handover module (12), development platform standard system bus module (8), communication module (13), display module (14), video input module (9) and audio frequency input/output module (10) are formed, development platform standard system bus module (8) respectively with development platform main control module (11), difference video signal generates and handover module (12), communication module (13), video input module (9) links to each other with audio frequency input/output module (10), difference video signal generate with handover module (12) respectively with development platform main control module (11), development platform standard system bus module (8) links to each other with display module (14); Adopt the core of field programmable gate function chip, support the soft renucleation of NiosII, external multiple memory chip of while, support program storage, data storage and buffering as development platform main control module (11); Rice is with the development platform standard system bus of 160 pins, and is open to the user, supports the digital video voicefrequency circuit embedded system secondary development based on this platform, and platform is supported various video audio interface and external communication interface; Adopt low voltage, high-speed difference video signal transmission mode, reduced the video interference, be supported in real-time display video image on 15 cun LCD in the display module (14).
7, microprocessor audio frequency and video control option secondary development plate based on embedded platform for developing audio and video according to claim 6, it is characterized in that described development platform standard system bus module (8) links to each other with development platform main control module (11) by the DAV interface, link to each other with handover module (12) with the difference video signal generation by the LVDS interface, link to each other with communication module (13) by the CMB interface, link to each other with video input module (9) by the DV interface, link to each other with audio frequency input/output module (10) by the DAB interface, link to each other with option standard system bus module (7) by the SRDU interface, formed the complete video of this platform, audio frequency and various outbound data communication interface, the development platform standard system bus is open fully to the user, supports the user to be undertaken developing based on the secondary embedded system option of this platform by the SRDU interface.
8, the microprocessor audio frequency and video control option secondary development plate based on embedded platform for developing audio and video according to claim 6, it is characterized in that described difference video signal generation links to each other with development platform main control module (11) by the VoC interface with handover module (12), link to each other with development platform standard system bus module (8) by the LVDS interface, link to each other with display module (14) by the LVDS interface, formed signal Processing, storage and the display channel of this platform.
9, the microprocessor audio frequency and video control option secondary development plate based on embedded platform for developing audio and video according to claim 6 is characterized in that it is main control chip that described development platform main control module (11) adopts large-scale F PGA chip EP1C6Q240C8; Described difference video signal generates with handover module (12) and adopts DS90C385 difference video to generate chip, adopts DS90CP22 difference video switch chip; Described development platform standard system bus module (8) adopts the standard socket of double 160 pins; Described video input module (9) adopts the SAA7111 video decoding chip, supports the input of two-way analog video signal, the input of one road S terminal component video signal; Described audio frequency input/output module (10) adopts the CS4297 audio coding decoding chip that meets AC ' 97 audio standards, supports the input of No. one microphone, a route input, a route output, the output of one road S/PDIF standard audio; Described display module (14) adopts 15 cun LCD; Described communication module (13) comprises serial interface, USB interface, Ethernet interface and keyboard interface.
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| CN 200610117311 CN1971544A (en) | 2006-10-19 | 2006-10-19 | Second development board of audio video control options of MPU based on audio video embedded development platform |
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| CN 200610117311 CN1971544A (en) | 2006-10-19 | 2006-10-19 | Second development board of audio video control options of MPU based on audio video embedded development platform |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235561A (en) * | 2013-02-26 | 2013-08-07 | 烟台中正新技术有限公司 | Universal development platform with audio and video functions for embedded measuring and controlling equipment |
| CN103281540A (en) * | 2013-06-19 | 2013-09-04 | 上海电力学院 | Method for achieving standard definition television transcoding |
| CN105204586A (en) * | 2015-10-27 | 2015-12-30 | 北京天华星航科技有限公司 | Novel thin client |
| CN110058542A (en) * | 2019-03-19 | 2019-07-26 | 徐州工程学院 | A kind of development platform device based on ARM9260 |
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2006
- 2006-10-19 CN CN 200610117311 patent/CN1971544A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235561A (en) * | 2013-02-26 | 2013-08-07 | 烟台中正新技术有限公司 | Universal development platform with audio and video functions for embedded measuring and controlling equipment |
| CN103281540A (en) * | 2013-06-19 | 2013-09-04 | 上海电力学院 | Method for achieving standard definition television transcoding |
| CN105204586A (en) * | 2015-10-27 | 2015-12-30 | 北京天华星航科技有限公司 | Novel thin client |
| CN110058542A (en) * | 2019-03-19 | 2019-07-26 | 徐州工程学院 | A kind of development platform device based on ARM9260 |
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