Unlock instant, AI-driven research and patent intelligence for your innovation.

Double reception FIFO method based on Ethernet receiving controller

A controller, Ethernet technology, applied in data exchange networks, digital transmission systems, electrical components, etc., can solve problems such as data frame discarding, and achieve the effect of improving efficiency, low cost, and achieving flexibility

Inactive Publication Date: 2008-06-11
JIANGSU LEMOTE TECH CORP
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1, purpose of the invention: the purpose of the invention is to provide a kind of method that can effectively improve Ethernet receiving data processing ability, solve the problem that may cause the data frame to be received to discard in the existing single receiving FIFO in SoC chip design

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0010] The present invention is specifically implemented for the tax control SoC chip and the Linux operating system based on Godson No. 1, which will be described in detail below:

[0011] The tax control SoC chip based on Godson 1 integrates a 10 / 100Mbps Ethernet core controller IP core. In a 10Mbps network environment, since the operating frequency (2.5MHz) of the receiving controller is far lower than the main frequency (33MHz) of the system, the data frame interval to be received is relatively large. Using a receive FIFO is enough to meet the data receiving and processing requirements. After starting the Linux operating system, use the ping command and other test tools to completely receive IP data packets of various sizes. It can be seen that the Ethernet core receiving controller does not discard data frames.

[0012] But in the 100Mbps network environment, the receiving controller operating frequency (25MHz) is slightly lower than the system main frequency (33MHz). W...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a dual-receiving FIFO method based on Ethernet core receiving controller, wherein said method makes two receiving FIFO work parallel, while one writes the data of preceding frame into main memory, and another receives the next data frame, and two receiving FIFO are switched. The invention can completely solve the frame lost problem, to improve the efficiency of data transmission, with low cost.

Description

1. Technical field [0001] The invention relates to an Ethernet core controller system structure, in particular to a double receiving FIFO method based on the Ethernet core receiving controller. 2. Background technology [0002] The design of the Ethernet core receiving controller is one of the key designs of the entire Ethernet core controller. At present, the general-purpose Ethernet core receiving controllers first temporarily store the data frames on the network in the receiving FIFO (the depth of the receiving FIFO varies). In SoC chip design, in order to effectively and reasonably use the bus, the data is written into the main memory when the amount of data written in the receiving FIFO reaches a certain upper limit value. A larger data frame may have to be written into the main memory from the receive FIFO several times. Unlike the sending controller, when the data frame sent over the network is not transmitted, the length of the data frame is not known. Therefore, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/00
Inventor 吴少刚章军肖永田
Owner JIANGSU LEMOTE TECH CORP