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Embedded system and method for deciding its buffer size

An embedded system and buffer technology, applied in transmission systems, digital transmission systems, memory address/allocation/relocation, etc., can solve problems such as increased manufacturing costs

Active Publication Date: 2008-10-15
VIA TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such a configuration will greatly increase the manufacturing cost

Method used

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  • Embedded system and method for deciding its buffer size
  • Embedded system and method for deciding its buffer size
  • Embedded system and method for deciding its buffer size

Examples

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Embodiment Construction

[0019] figure 2 A schematic diagram of an embedded system according to an embodiment of the present invention is shown. The embedded system 2 at least includes an arbiter 20 , a device 22 , a device 24 , a device 26 , a device 28 and a bus 29 . The device 22 , the device 24 , the device 26 , and the device 28 share the bus 29 for transmitting and receiving data through the bus 29 . Among them, these devices can be any kind of communication devices, such as MAC controllers of wired or wireless networks, etc., and can also be any devices that require continuous transmission / reception, wherein each device has a buffer and a survival value (TTD). Therefore, the survival values ​​of devices 22, 24, 26, and 28 can be denoted as TDD1, TDD2, TDD3, and TDD4, respectively.

[0020] In the present invention, the buffer is used to temporarily store the data required for the transmission process, and the survival value is used to record the current state of the buffer, that is, the tim...

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PUM

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Abstract

The invention relates to a buffer size decide method, used in embedded system, wherein it comprises: first, testing the buffer fill time (BFT) and request response time (RRT); then calculating the media data rate (MDR) and the number of several bus maters (NBM); at least, based on these data, deciding the size of each buffer.

Description

technical field [0001] The present invention relates to a buffer size determination method, in particular to a buffer size determination method of an embedded system and its device. Background technique [0002] Embedded systems are currently a very common design approach. Several devices in an embedded system, such as a central processing unit (CPU), a bridge, and a medium access controller (medium access control, MAC), etc. may share the same bus (bus), and only one of them can be used at a time Has the right to use the bus (bus ownership). Therefore, there is usually an arbiter to manage the bus ownership according to some arbitration rules, such as round robin or priority. When a certain device in the system wants to use the bus, it sends a request to the arbiter to request the right to use the bus. The arbitrator judges the current state of the bus and the priority levels of all requesting devices according to the arbitration rules, and decides to hand over the bus u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F12/02H04L12/56H04L49/901
Inventor 徐荣灿蔡文宗
Owner VIA TECH INC