对CPU感兴趣的朋友可以到这里来,不要乱找了!

fineamy

http://www.opencores.org/browse.cgi/by_category

The need

Today, deep submicron (DSM) designs include many millions of gates in a single application-specific integrated circuit (ASIC). The number of gates continues to grow, with the result that design times get longer and longer. This can result in excessive time- to-market and excessive cost.

The technical solution to the problem is core re-use. This speeds up the design by enabling engineers to cooperate.

Currently, cores available for integration are proprietary and must be purchased from established vendors, often at very high prices. These costs can be burdensome, especially for small design teams with limited funding. Proprietary cores are hard to integrate due to the multiplicity of incompatible design and test tools. Usually, proprietary cores lack adequate documentation, and the purchasor does not have access to the source, which makes the task of integration much more difficult, perhaps prohibitively so.


Project objective

Our main objective is to design and publish core designs under a license for hardware modelled on the Lesser General Public License (LGPL) for software. We are committed to the ideal of freely available, freely usable and re-usable open source hardware.


Subsidiary objectives

We have set the following objectives as the means of reaching our main objective:


Develop standards for open source cores and platforms
Create tools and methods for development of open source cores and platforms
Develop open source cores and platforms
Provide documentation for these cores and platforms
These tools and methods should allow large, widespread, even international, teams to develop hardware in an open way.

Expected benefits

Open source hardware is the solution to most of the problems associated with proprietary cores. It has the following benefits.


Each core will have a larger user base, which will ensure better support, better documentation and better implementation examples to work from.
The source is available, so any developer can find out what he or she needs to know about the core.
There is no charge for using the core.
Eventually, as cores and standards for them are developed, cores will become more standards-compliant than proprietary cores.
Challenges


How can the reliability of open source cores be guaranteed?
What precise licensing methods should be used?

sep

谢谢楼主的提供。我推荐一个硬件技术论坛：http://bbs.chinaecnet.com/，如果有兄弟做pcb或嵌入式的可以去看看，同时也希望推荐一些好的论坛给我们。我就觉得cu上的嵌入式板块太少人气了。

cjaizss

偶一向奉行：万物皆嵌入