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Transmission device and transmission method for direct memory access

A transmission device and memory technology, which is applied in the direction of instruments, electrical digital data processing, sustainable buildings, etc., can solve the problems of not being able to completely separate from the system, and the inability to obtain system power consumption and transmission effects, etc., to achieve reduced power consumption and low system cost. The effect of power consumption

Active Publication Date: 2014-02-12
ARKMICRO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To sum up, the current DMA transmission methods in the prior art cannot be completely separated from the system. Every transmission process must start the CPU to configure the DMA transmission device, and neither can achieve a balance between system power consumption and transmission effect.

Method used

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  • Transmission device and transmission method for direct memory access
  • Transmission device and transmission method for direct memory access
  • Transmission device and transmission method for direct memory access

Examples

Experimental program
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Effect test

Embodiment 1

[0036] The structure of Embodiment 1 of the direct memory access transmission device of the present invention is as follows figure 1 As shown, it includes a three-dimensional DMA control module 100, a first data terminal 104, a second data terminal 105, a storage task module 109, a first clock 106, a second clock 107, and a third clock 108.

[0037] The three-dimensional DMA in the present invention refers to the addition of one more time dimension on the basis of the two-dimensional DMA described in the prior art. All three-dimensional DMA in the present invention is explained in this way.

[0038] The three-dimensional DMA control module 100 includes: a time control module 101, a time transmission control module 102, a first FIFO module 103, a two-dimensional task transmission control module 111, a two-dimensional task register 110, and a task fetching module 112.

[0039] The time control module 101 is used to configure the time dimension and the priority of each operation trigger ...

Embodiment 2

[0071] The DMA transmission device described in this embodiment is based on link DMA, and is characterized in that it contains multiple tasks at a single time point. The specific structure of the DMA transmission device is basically the same as the structure of the DMA transmission device described in Embodiment 1. One feature of the link DMA is that there will be n tasks at an operation trigger point, and another feature is that each task packet contains both the task content and the storage address of the next task packet.

[0072] The working principle of the DMA transmission device described in this embodiment is basically the same as that described in embodiment 1:

[0073] The central processing unit CPU300 configures the DMA transmission device through the second FIFO module 301, that is, configures the time control module 101 and the two-dimensional task register 110 in the three-dimensional DMA control module 100 respectively.

[0074] The configuration of the time control m...

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Abstract

The invention discloses a transmission device for direct memory access. The device comprises a DMA control module, a source end storage module, a destination storage module and a storage task module,wherein the source end storage module, the destination storage module and the storage task module are connected with the DMA control module respectively; and the storage task module is connected witha CPU. The invention also discloses a transmission method for the direct memory access, which comprises the following steps: determining each DMA operation trigger point on a time dimension, determining two-dimensional transmission task on the each operation trigger point, and configuring the priority order of the two-dimensional transmission task on the each operation trigger point. The DMA transmission device and the method can well meet the requirements when portable consumer electronic products carry out image data transmission, and obviously reduce the used power consumption of the system.

Description

Technical field [0001] The present invention relates to a direct memory access transmission device and method, in particular to a direct memory access transmission device and method based on portable multimedia application equipment for data transmission. Background technique [0002] Direct Memory Access (DMA, Direct Memory Access) is an important transmission technology for microcomputer systems to improve data transmission efficiency. The traditional DMA transmission technology can access the data blocks in the system equipment while the central processing unit (CPU, Central Process Unit) is performing tasks, reducing the load on the processor, and because it is a direct memory access, its transmission The speed is faster than that of the CPU to access data; DMA transmission technology can also control the access of data blocks by a dedicated hardware circuit without the participation of the CPU. [0003] In the application of multimedia technology, the data transmission speed ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F13/28
CPCY02B60/1228Y02B60/1235Y02D10/00
Inventor 方应龙金善子刘俊秀石岭
Owner ARKMICRO TECH