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Altera_Forum's avatar
Altera_Forum
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8 years ago

setting placement constraints in Quartus

Hi everybody,

I am new with Quartus. I want to set some placement constraints on some logic blocks of the FPGA. For example, I want to prohibit some sites (ALM, block RAMs,...) and tell the tool to do not place any thing on these sites. Additionally, I want to force the tool to place some modules in a specified location (a rectangular region in the target FPGA). Is this capabilities available in Quartus?

Thanks in advance,

farzian

4 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    8 years ago

    Hi,

    I think "Partition planner" and "Logilock regions" in Quatus is what you are looking for, but these features are only available in Quartus standard and Pro editions.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    8 years ago

    Afaik, you cannot lock areas of the chip to prevent their use - just reserve areas/specific logic elements for specific entities/logic elements that give priority to the blocks you specify. If they are not used by this logic, then the fitter is free to put something else there.

    But why are you attempting to do this? unless you have some timing issues, its better to let the tool do the placement.