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Transmission system and method for directly accessing controller data

A data transmission system and storage access technology, which is applied in the field of direct storage access controller data transmission system, can solve the problems of wasting handshake time, etc., achieve the effect of reducing work load, saving handshake time, and improving work efficiency

Inactive Publication Date: 2010-09-29
VIMICRO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen from this that the existing DMA controller reads and writes the external memory of the chip, all of which send read and write commands to the external memory through the internal MCU, and then hand over the control right to the DMA controller, and then read and write data. Wasted a lot of handshake time

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  • Transmission system and method for directly accessing controller data
  • Transmission system and method for directly accessing controller data
  • Transmission system and method for directly accessing controller data

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Embodiment Construction

[0019] The specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0020] In one embodiment, the present invention proposes a direct memory access (Direct Memory Access, DMA for short) controller data transmission system, wherein figure 1 A structural block diagram of the DMA controller data transmission system is shown. Such as figure 1 As shown, the DMA controller data transmission system includes an internal memory 120 , a DMA controller 140 , a microprocessor (Micro Controller Unit, MCU for short) 160 , an input / output interface 180 and an external memory 200 . The internal memory 120 , the DMA controller 140 , the microprocessor 160 and the I / O interface 180 can be integrated into an integrated circuit 100 .

[0021] The input and output interface 180 may be a serial peripheral interface (Serial Peripheral Interface, SPI for short). The external memory 200 may be a flash memory (Flash Memory) or a read only...

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Abstract

The invention discloses a direct store access controller data transmission system comprising a first storage, a second storage, a microcontroller and a direct store access controller. The direct store access controller comprises a command register. The microcontroller configures an access first storage's command for the command register. When the system need to directly store an access transmission, the microcontroller start the direct store access controller, and the direct store access controller sends an access command to the first storage according to the content of the command register in order to start the direct store access transmission between the first storage and the second storage. In this way, the system not only saves lots of handshake time but also alleviates working load of the microcontroller so that the efficiency is improved.

Description

【Technical field】 [0001] The invention relates to the field of data processing, in particular to a direct memory access (Direct Memory Access, DMA for short) controller data transmission system and method. 【Background technique】 [0002] At present, data transmission between a computer system and an external device, or between different memories of a computer system is usually performed through a central processing unit (Central Processor Unit, CPU for short). The CPU can use the program control method or the interrupt method to control the data transmission with the external device, but these two data transmission methods are relatively slow. When a large amount of data is quickly transmitted between high-speed external devices and computer system memory, or between different memories in the computer system, these two data transmission methods limit the data transmission rate to a certain extent. In order to increase the speed of data transmission between the computer syst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/28
Inventor 张桂友付军李建军王秉举
Owner VIMICRO CORP