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MAP的时候总是会出现这个错误,导致MAP失败,到底是什么原因导致的,我也只调用了6个BUFG啊!!!!!
ERROR lace:1368 - Automatic clock placement failed. Please attempt to analyze the global clocking required for this
design and either lock the clock placement or area locate the logic driven by the clocks so that that the clocks may
be placed in such a way that all logic driven by them may be routed. There are two main restrictions on clock
placement for this architecture. The first is that only 12 of 32 clocks sourced by BUFGs may enter a region. The
second is that all loads of a BUFH must be placed in the same region as the BUFH. For further information see the
"Clocking Resources" section in the 7 Series FPGAs Clocking Resources User Guide.
ERROR ack:1654 - The timing-driven placement phase encountered an error. |
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