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发表于 2018-4-21 21:59:33
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是不是zero time glitch?
modelsim 有办法显示的。
大概意思是t时刻,net is driven by a value, T+0, net is driven by another value.
If you think the RTL code as a program, then you can understand which part executed first, then second. Mostly it is because of race condition.
In default, modelsim just record latest value in VCD, you won't see the 0 time glitch in time t.
If you set one attribute in control file of modelsim (I can't remember, I think you can find it in modelsim userguide), it can help you to record this glitch, you can extend it in that time. |
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