无法在IOS 11上使用时钟向导实例化dcm

看起来您已经附加了体系结构生成的.ucf文件
向导到你的项目。
实例名称“DCM_SP_INST”来自
实例化的模块。
因此，您需要编辑要包含的.ucf文件
该模块的分层路径。
例如，如果您实例化了
您的顶级模块：
dcm_10Mhz foo
（
...
）;
然后你需要改变：
INST DCM_SP_INST CLK_FEEDBACK = 1X;
至：
INST foo / DCM_SP_INST CLK_FEEDBACK = 1X;
或者你可以不像我想的那样包含这个.ucf文件
除了可能的周期限制之外的所有事情
在源文件中。
HTH，
的Gabor
-  Gabor



以下为原文

It looks like you have attached the .ucf file generated by the architecture
wizard to your project.  The instance name "DCM_SP_INST" comes from
the instantiated module.  So you would need to edit the .ucf file to contain
the hierarchical path to that module.  For example if you instantiated the
module from your top level as:
 
dcm_10Mhz foo
(
 ...
);
 
Then you need to change:
 
INST DCM_SP_INST CLK_FEEDBACK = 1X;
 
to:
 
INST foo/DCM_SP_INST CLK_FEEDBACK = 1X;
 
Alternately you can just not include this .ucf file as I would think
everything except possibly period constraints would already be
in the source file.
 
HTH,
Gabor
-- Gabor