DONE信号是否表示配置完成且FPGA可以正常工作？

第一个问题可能是由于锁定DCM所需的时间。
如果您关闭等待DCM锁定，
然后，一旦你发布GWE，设计应该会运行。
至于你的第二个问题，配置后的INIT值为零时为零
代码中没有初始化。
如果您有同步或异步重置
代码中的值，例如在您发布异步重置的代码段中
“1010”然后配置后的值将匹配该值，除非您有
以两种方式之一显式分配INIT值：
1）使用INIT属性（参见约束手册）
2）在信号声明中应用初始值（参见XST手册）
在这种情况下，您可以将INIT值设置为您想要的任何值，这将是值
在配置时。
它不必匹配异步或
同步复位值。
问候，
的Gabor
-  Gabor



以下为原文

The first issue is likely due to the time it takes to lock the DCM.  If you turn off Wait to DCM Lock,
then the design should come up running as soon as you release GWE.
 
As to your second question, the INIT value after configuration is zero when there is
no initialization in your code.  If you have a synchronous or asynchronous reset
value in the code, for example in the snippet you posted an asynchronous reset to
"1010" then the value after configuration will match that value unless you have
explicitly assigned an INIT value in one of two ways:
 
1) using the INIT attribute (see the constraints manual)
 
2) by applying an initial value in the signal declaration (see the XST manual)
 
In this case you can set the INIT value to anything you want, which will be the value
at the time of configuration.  It does not have to match the asynchronous or
synchronous reset value.
 
Regards,
Gabor
-- Gabor

要添加到Gabor的观点，如果在您的设计中实例化了STARTUP_SPARTAN3A原语，则可以访问GSR。
有关详细信息，请参阅Spartan-3A库指南，第272页：
http://www.xilinx.com/support/documentation/sw_manuals/xilinx12_3/spartan3a_hdl.pdf
上述post引用的初始化值将是特定元素在重置后的值，无论该重置是本地的，还是来自配置后的GSR或来自用户。
希望这可以帮助
-Eric



以下为原文

To add to Gabor's point, you do have access to the GSR using the STARTUP_SPARTAN3A primitive if it is instantiated in your design.  See the Spartan-3A Libraries Guide, page 272 for more details:
http://www.xilinx.com/support/documentation/sw_manuals/xilinx12_3/spartan3a_hdl.pdf
 
The initialization value which the above post references will be the value that the specific element comes out of reset in, regardless if that reset is local, from the GSR after config or from the user. 
 
Hope this helps
-Eric