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Altera_Forum's avatar
Altera_Forum
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14 years ago

compile the same project several times get several different timing results, why?

In my project, the original files are top.vhd, Niosii_cpu.sopcinfo, Niosii_CPU.sopc, create-quartus-project.tcl , board.tcl file (which includes setting configuration), board.sdc (which include timin...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

I think it is better to make my question clear here:

In order to check it is the matter of regeneration of sopc system or not.

I open the generated project file in Quatus (all generated files are kept, and the worst setup slack is -0.597ns), I recompiled by double click compilation design in Quatus GUI. The timing result (0.173) is still different with previous result(-0.597) which is compiled by make script. But if I recompile the same project file in Quatus GUI again, it will stay the same (0.173). I do not understand, are there any difference between Quatus GUI and script command?