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Structure and method for improving speed of external memory interface of high-definition image real-time collecting system DSP

An external memory and real-time acquisition technology, applied in the field of electronic information, can solve problems such as poor input and output speeds, and achieve the effect of improving efficiency and improving transmission efficiency

Inactive Publication Date: 2010-04-14
上海凯意电子科技有限公司
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Problems solved by technology

[0006] Because this method reads data in units of frames, it makes full use of the fast speed of SDRAM in continuous data operations, eliminates the waiting time for data line and field blanking, solves the problem of input and output speed differences, and completes the image data processing. seamless buffering

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  • Structure and method for improving speed of external memory interface of high-definition image real-time collecting system DSP
  • Structure and method for improving speed of external memory interface of high-definition image real-time collecting system DSP
  • Structure and method for improving speed of external memory interface of high-definition image real-time collecting system DSP

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Embodiment Construction

[0033] A specific implementation case of the present invention is as follows: figure 1 As shown, the structure for improving the interface speed of the DSP external memory of the high-definition image real-time acquisition system uses DM642 (1) as the core processor, and among the four CE spaces of the external memory interface, CE0 and CE2 are configured as 32-bit synchronous spaces; CE1 is The asynchronous space is connected to FLASH; CE3 is an 8-bit asynchronous space connected to serial ports and network ports. CE0 is connected to SDRAM1(3) as the main code data memory, CE2 space is connected to FPGA(2), and SDRAM2(5) and SDRAM3(6) used as data buffer are switched through FPGA(2) for ping-pong operation.

[0034] The SDWE, Eclkout2, SDCAS, SDRAS, EA[17:3], ED[31:0] and BE[3:0] signal pins of the DM642(1) external memory interface are respectively connected to the WE, CKE, CAS, RAS, A, D and DQM pins, CE0 pin is connected to the / CS pin of SDRAM1(3), while SDWE, Eclkout2, ...

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Abstract

The invention relates to a structure and a method for improving the speed of an external memory interface of a high-definition image real-time collecting system DSP. The structure comprises a system core processor DM642, a FPGA, a CCD collecting module and three memory devices. The method comprises the steps that the data bus between the DSP and two SDRAMs is alternatively switched by the FPGA so as to realize the dual-cache ping-pong operation of the image data, and a writing control signal is generated by the FPGA so as to directly write the CCD data in the two SDRAMs. The structure and the method complete the real-time collecting task of the high-definition images and greatly improve the switching speed of the EMIF bus data.

Description

technical field [0001] The invention relates to a solution that uses two SDRAMs to perform ping-pong operations as image data buffers to increase the data acquisition speed of an EMIF port of a DSP to meet the requirements for real-time acquisition of high-definition images. It belongs to the field of electronic information. Background technique [0002] With the development of intelligent surveillance technology, higher requirements are put forward for the resolution of surveillance video images. At present, the embedded image acquisition system scheme based on DM642 basically adopts the method of inputting the standard video data stream into the core processor DM642 through the VP port of the video interface. In order to break through the limitation of traditional video capture resolution and provide enough data volume for video analysis, the external memory interface (EMIF) of DSP is used for data capture and exchange with external data. The EMIF of TMS320C6000DSP has s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06G06F13/40G06F13/28G11C7/10H04N5/907
Inventor 金臻陆小锋张颖杨辉袁承宗
Owner 上海凯意电子科技有限公司
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