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Direct access device of storage and data transmission method thereof

A technology of access device and memory, applied in the direction of electrical digital data processing, instruments, etc., can solve the problems of speeding up the switching processing speed of DMA commands, not eliminating the waste of resources and complex design of chained DMA, so as to save time and expense and control progress , the effect of flexible progress

Inactive Publication Date: 2006-01-11
SHANGHAI MAGIMA DIGITAL INFORMATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this queue-type DMA can speed up the processing speed of DMA command switching to a certain extent, it does not eliminate the defects of chained DMA waste of resources and complicated design.

Method used

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  • Direct access device of storage and data transmission method thereof
  • Direct access device of storage and data transmission method thereof
  • Direct access device of storage and data transmission method thereof

Examples

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Embodiment Construction

[0026] Combined in this example Figure 1A and 1B The application shown in is described in detail the content of the present invention. figure 2 It is an exemplary structural block diagram of the direct memory access (DMA) device 200 of the present invention, the DMA device 200 mainly includes a control register 203, a parameter random access memory (RAM) 204 and two working units 214, 215 for reading and writing.

[0027] Figure 3A It is a schematic diagram of the data channel composition of the direct memory storage device of the present invention. Figure 3A Among them, the DMA device 200 of the present invention can include multiple data channels, and here we will take 64 data channels as an example for illustration, but if it is required by the function, the setting of channels can also be increased or decreased, which should also be included in the present invention within the substantive range. Corresponding to the data channels one by one, the parameter RAM 204 is...

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Abstract

The present invention relates to a direct memory access (DMA) device and method. DMA device includes control register, data bus, address bus, parameter RAM and at least a working engine. The parameter RAM can be divided into several entries, every entry and data bus, address bus and working engine are formed into a data channel together. The working engine includes data transmission unit, address computing unit and global address memory. Said invention also provides the concrete steps of DMA method.

Description

technical field [0001] The invention relates to a direct memory access device (Direct Memory Access, DMA) and a data transmission method thereof, in particular to a direct memory access device for conveniently and rapidly performing data transmission operations in discontinuous address spaces. Background technique [0002] In the era of image transmission becoming more and more popular, the high-speed transmission of image data has become an important research topic. Direct memory access device (DMA) is widely used in various processor systems. It can directly connect peripheral devices, such as various input / output devices, with the corresponding addresses of the memory, and directly transfer data between the two through the bus. , It can also directly transmit data between memories, it does not need to be allocated by the central processing unit, and can greatly speed up the speed of data transmission. Therefore, using a DMA device to transmit im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/28
Inventor 周振亚陶南孙民梁
Owner SHANGHAI MAGIMA DIGITAL INFORMATION
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