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Data-transmission method, system and CPU interface controller

A data transmission method and technology of an interface controller, applied in the field of communication, can solve the problems of reducing the working efficiency of the transmission system, occupying the transmission bandwidth of the AHB bus, and the AHB bus cannot be released, etc., to achieve the effect of improving the bus utilization rate

Active Publication Date: 2010-07-28
HUAWEI TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the AHB bus transmits data at a fast speed, but the CPU interface transmits data at a slow speed, and it usually takes more than 100ns to transmit data once. Therefore, in the CPU interface controller, the AHB bus transmission data at the input end is controlled by the CPU interface at the output end. Only after completing a data transmission through the CPU interface, the AHB bus can complete this transmission work. That is, because the transmission rate of the AHB bus is much higher than the transmission rate of the CPU interface, the AHB bus cannot be released before the CPU interface completes the transmission to complete the system. Therefore, multiple transmissions of image display data will occupy a large amount of transmission bandwidth of the AHB bus and reduce the working efficiency of the transmission system

Method used

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  • Data-transmission method, system and CPU interface controller
  • Data-transmission method, system and CPU interface controller

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Embodiment Construction

[0032] Embodiments of the present invention provide a data transmission method, a system, and a CPU interface controller for driving image display through a CPU interface in a mobile terminal device. After receiving the data transmitted through the bus, the data is stored, and then the stored data is stored. The data is sequentially transmitted to the corresponding display device through the CPU interface.

[0033] In order to enable those skilled in the art to better understand the technical solutions provided by the embodiments of the present invention, the technical solutions provided by the embodiments of the present invention will be further described in detail below in conjunction with the drawings and specific implementation methods.

[0034] The flow of the first embodiment of the data transmission method of the present invention is as follows figure 1 Shown:

[0035] Step 101: After receiving the data transmitted through the bus, store the data.

[0036] Step 102: ...

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Abstract

In the embodiment, the invention discloses a data transmission method, a data transmission system and a CPU interface controller. The method comprises the steps that: after data transmitted through a bus is received, the data is stored; and the stored data is transmitted to a corresponding display unit through the time sequence of a CPU interface. With the invention, the bus transmission functionand the CPU transmission function do not need to be finished in one-time data transmission, but bus data transmitted at high-speed is stored to ensure that the bus resource can be released in time, thereby finishing other work in the system; then the CPU interface makes low-speed transmission to the stored data to ensure that the bus transmission and the CPU transmission are respectively finished, thereby effectively improving the bus utilization rate and the working efficiency of the system under the condition of failing to change the transmission rate of the CPU interface.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a data transmission method, system and CPU interface controller. Background technique [0002] Mobile terminal equipment usually uses a CPU (Central Processing Unit, central processing unit) interface to drive an LCD (Liquid Crystal Display, liquid crystal display) for image display. The image display data is generated by a data transmission device, and the data transmission device passes through AHB (Advanced High-Performance Bus , advanced high-performance bus) bus sends the processed data to the CPU interface controller, and the CPU interface controller transmits the data to the LCD for display according to the CPU interface protocol, that is to say, the CPU interface controller needs to perform image display data transmission Interface timing conversion. [0003] The inventor found in the research of the prior art that because the existing CPU interface controller only...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F3/147
Inventor 邓莉季渊
Owner HUAWEI TECH CO LTD
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