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Valued Contributor III
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The output sof files are different each time synthesis the project in Quartus

Hi everybody, 

I'm developing a project using Cyclone V FPGA in Quartus 15.1 Prime Lite edition (http://dl.altera.com/15.1/?edition=lite&lang=en). I have encountered with "strange" circumstances that some time when I synthesis my design (without changing it) I have a different sof output file. Therefore the main problem in this case is: when I program and execute the design on the development kit, the actual result of each design is different. I can not find out the root cause of this case. Please support me some advise and recommendation for this problem. Thank you!
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Valued Contributor III
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Hi, 

 

Have you read this document (http://www.alterawiki.com/wiki/file:fittingalgorithms_and_seedsweeps.pdf)? It explains some of the variations.
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Valued Contributor III
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Hi, 

 

I found out something (http://www.alterawiki.com/wiki/the_quartus_ii_fitter_and_seed_sweeps) in the Wiki on the matter. I think the linked document might answer a few of your questions. 

 

Smith
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