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dns13's avatar
dns13
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6 years ago
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alftp components missing in altera_mf_components on Quartus 20.1

I've recently updated from 18.1 Lite to 20.1 Lite and now my build is failing as all altfp components are missing in the declaration file. I haven't found anything about deprecation of this use. Do...
  • FvM's avatar
    FvM
    3 years ago

    Hello,

    I came across the same problem today and noticed that the question hasn't been clearly answered by Intel team.

    The answer seems quite obvious though. All altfp_xxx IP has been removed from the library since Quartus 19 but is still in the IP catalog for some devices, curiously not for all, e.g. MAX10. As stated in a different thread, it's expected that you use the new HLS based FP_FUNCTIONS Intel FPGA IP instead. It has additional features like freely selecting the pipeline level based on speed requirements.

    Regards
    Frank

dns13's avatar
dns13
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6 years ago

Hi KhaiY,

I've attached a component (and the used component "st_driver") that's failing compilation on 20.1 with "Error (10482): VHDL error at measure_trigger_time.vhd(75): object "altfp_div" is used but not declared". It worked completely fine with 18.1 as it is.

When I check the library file under "<quartus install dir>/libraries/vhdl/altera_mf/altera_mf_components.vhd" all altfp_* declarations are missing - they are present in the 18.1 version of this file. I could do the component declaration in each file for my own, but I think that's not how it's supposed to be.

Thanks
Jan

dns13's avatar
dns13
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6 years ago

The issue seems to lay deeper:

  • Just creating a new library with all the altfp_* component declarations from 18.1 failed with component not found
  • Then I tried to use the megafunction compiler to create the used megafunctions. This worked for altfp_div, but alftp_convert just creates an empty *.qip file with not even opening the MegaWizard, failed with "Error (14736): Error: Wizard "ALTFP_CONVERT" cannot be launched."
  • Reinstalling Quartus 20.1 did not help