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Altera_Forum
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12 years ago

Cyclone IV Development Kit bts_general won't fit when compiled with 12.1

I have the Cyclone IV GX Transceiver Starter Kit. I am trying to use the bts_general project included with it. For comparison's sake, I am compiling it with two different Quartus versions, 10.1 and...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

I guess some device in your sopc uses some memory (1kB, according to DLR usage difference) which 10.1 implemented with block RAM, while 12.1 now synthesizes with logic cell registers. Probably Qsys and SOPC builder optimiize the design in different ways.

Check device options in Qsys: for some of them you can explicitly select to use registers rather than block RAM.

You can also browse Quartus Fitter report in order to show resource utilization for each design entity.