如何检查约束是否有效？

嗨，@ arthur42，请先参考以下链接：https：//forums.xilinx.com/t5/Implementation/How-to-apply-set-property-ALLOW-COMBINATORIAL-LOOPS-TRUE-to-pass/mp
/ 781323＃M18432
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-----------------------不要忘记回答，kudo，并接受为解决方案.-------------
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在原帖中查看解决方案



以下为原文

Hi, @arthur42 ,
Please refer to the below link first:
https://forums.xilinx.com/t5/Implementation/How-to-apply-set-property-ALLOW-COMBINATORIAL-LOOPS-TRUE-to-pass/m-p/781323#M18432

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嗨，
请分享错误消息。
谢谢，佳日



以下为原文

Hi,
 
Please share the error message.
 
Thanks,
Yash

嗨，@ arthur42，请先参考以下链接：https：//forums.xilinx.com/t5/Implementation/How-to-apply-set-property-ALLOW-COMBINATORIAL-LOOPS-TRUE-to-pass/mp
/ 781323＃M18432
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-----------------------不要忘记回答，kudo，并接受为解决方案.-------------
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以下为原文

Hi, @arthur42 ,
Please refer to the below link first:
https://forums.xilinx.com/t5/Implementation/How-to-apply-set-property-ALLOW-COMBINATORIAL-LOOPS-TRUE-to-pass/m-p/781323#M18432

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Don't forget to reply, kudo, and accept as solution.
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@ arthur42，
您是否实际检查了原理图并在组合循环上进行验证？
问题主要是由于RTL代码不正确。
请查看以下论坛链接：
https://forums.xilinx.com/t5/Synthesis/Debugging-combinatorial-loop/td-p/684698
https://forums.xilinx.com/t5/Implementation/DRC-LUTLP-1-Combinatorial-Loop-Error-bitstream-generation-failed/td-p/833650
--Syed
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以下为原文

@arthur42,
 
Did you actually check the schematic and validate on the combinational loop? The issue is mostly due to incorrect RTL code. 
Please check the following forums link: 
 
https://forums.xilinx.com/t5/Synthesis/Debugging-combinatorial-loop/td-p/684698
 
https://forums.xilinx.com/t5/Implementation/DRC-LUTLP-1-Combinatorial-Loop-Error-bitstream-generation-failed/td-p/833650
 
--Syed
 
 
 
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