用Xilinx的AccelDSP工具设计流程跑到Implement步骤时序错误，跪求过来人解答

oosnake

小弟刚开始学用Acceldsp工具跑DSP设计的流程，做的实验在跑到综合后，轮到实现Implement步骤时报错，错误如下：
Running delay-based LUT packing...
#ERRORack:1653 - At least one timing constraint is impossible to meet because
#   component delays alone exceed the constraint. A timing constraint summary
#   below shows the failing constraints (preceded with an Asterisk (*)). Please
#   use the Timing Analyzer (GUI) or TRCE (command line) with the Mapped NCD and
#   PCF files to identify which constraints and paths are failing because of the
#   component delays alone. If the failing path(s) is mapped to Xilinx components
#   as expected, consider relaxing the constraint. If it is not mapped to
#   components as expected, re-evaluate your hdl and how synthesis is optimizing
#   the path. To allow the tools to bypass this error, set the environment
#   variable XIL_TIMING_ALLOW_IMPOSSIBLE to 1.
#
#
#   For more information about the Timing Analyzer, consult the Xilinx Timing
#   Analyzer Reference manual; for more information on TRCE, consult the Xilinx
#   Development System Reference Guide "TRACE" chapter.
#
它说是时序有一处错误，需要用Timing Analyzer分析，但是我找不到这个工具，请问遇到这种问题应该如何定位错误源，怎么分析！！！
另外，我看的是Xilinx ISE Design Suite 10.X FPGA开发指南 DSP 、嵌入式与高速传输篇这本教材，上面讲到用AccelDSP跑流程给我的感觉是在工具界面按它给的流程点按钮，从验证浮点程序到Implement，最后还有验证门级网表，请问这些跑完如何才能产生下载到Xilinx开发板上的bitstream！！！
非常感谢

gglight

我也想学，难吗？

菜鸟要飞

这个AccelDSP工具到了ISE高级版本，是不是就没了？