请提供足够详细的信息来有效地描述您的问题。
你以前听过这个，从那时起没有任何改变。
由于您知道50MHz时钟正在运行，请尝试将50MHz时钟连接到25MHz时钟输出引脚。
这将验证输出引脚是否正常工作。
如果没有看到顶级设计代码（带引脚连接），至少提供更有用的建议是很困难的。
还要检查信号名称拼写，这会导致与引脚或UCF条目断开连接。
检查后P / R引脚报告。
- 鲍勃埃尔金德
签名：新手的自述文件在这里：http：//forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369总结：1。
阅读手册或用户指南。
你读过手册了吗？
你能找到手册吗？2。
搜索论坛（并搜索网页）以寻找类似的主题。
不要在多个论坛上发布相同的问题。
不要在别人的主题上发布新主题或问题，开始新的主题！5。
学生：复制代码与学习设计不同.6“它不起作用”不是一个可以回答的问题。
提供有用的详细信息（请与网页，数据表链接）.7。
您的代码中的评论不需要支付额外费用。
我没有支付论坛帖子的费用。
如果我写一篇好文章，那么我一无所获。
以上来自于谷歌翻译
以下为原文
Please provide sufficent details to usefully describe your problem. You've heard this before, and nothing has changed since then.
Since you know that the 50MHz clock is functioning, try connecting the 50MHz clock to your 25MHz clock output pin. This will verify that the output pin is functioning. It's difficult to offer more useful advice without seeing your top-level design code (with pin connections), at the very least.
Also check signal name spellings which would result in disconnections to the pins or UCF entries. Check the post-P/R pin report.
- Bob Elkind
SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369
Summary:
1. Read the manual or user guide. Have you read the manual? Can you find the manual?
2. Search the forums (and search the web) for similar topics.
3. Do not post the same question on multiple forums.
4. Do not post a new topic or question on someone else's thread, start a new thread!
5. Students: Copying code is not the same as learning to design.
6 "It does not work" is not a question which can be answered. Provide useful details (with webpage, datasheet links, please).
7. You are not charged extra fees for comments in your code.
8. I am not paid for forum posts. If I write a good post, then I have been good for nothing.
请提供足够详细的信息来有效地描述您的问题。
你以前听过这个，从那时起没有任何改变。
由于您知道50MHz时钟正在运行，请尝试将50MHz时钟连接到25MHz时钟输出引脚。
这将验证输出引脚是否正常工作。
如果没有看到顶级设计代码（带引脚连接），至少提供更有用的建议是很困难的。
还要检查信号名称拼写，这会导致与引脚或UCF条目断开连接。
检查后P / R引脚报告。
- 鲍勃埃尔金德
签名：新手的自述文件在这里：http：//forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369总结：1。
阅读手册或用户指南。
你读过手册了吗？
你能找到手册吗？2。
搜索论坛（并搜索网页）以寻找类似的主题。
不要在多个论坛上发布相同的问题。
不要在别人的主题上发布新主题或问题，开始新的主题！5。
学生：复制代码与学习设计不同.6“它不起作用”不是一个可以回答的问题。
提供有用的详细信息（请与网页，数据表链接）.7。
您的代码中的评论不需要支付额外费用。
我没有支付论坛帖子的费用。
如果我写一篇好文章，那么我一无所获。
以上来自于谷歌翻译
以下为原文
Please provide sufficent details to usefully describe your problem. You've heard this before, and nothing has changed since then.
Since you know that the 50MHz clock is functioning, try connecting the 50MHz clock to your 25MHz clock output pin. This will verify that the output pin is functioning. It's difficult to offer more useful advice without seeing your top-level design code (with pin connections), at the very least.
Also check signal name spellings which would result in disconnections to the pins or UCF entries. Check the post-P/R pin report.
- Bob Elkind
SIGNATURE:
README for newbies is here: http://forums.xilinx.com/t5/New-Users-Forum/README-first-Help-for-new-users/td-p/219369
Summary:
1. Read the manual or user guide. Have you read the manual? Can you find the manual?
2. Search the forums (and search the web) for similar topics.
3. Do not post the same question on multiple forums.
4. Do not post a new topic or question on someone else's thread, start a new thread!
5. Students: Copying code is not the same as learning to design.
6 "It does not work" is not a question which can be answered. Provide useful details (with webpage, datasheet links, please).
7. You are not charged extra fees for comments in your code.
8. I am not paid for forum posts. If I write a good post, then I have been good for nothing.
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