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XQSHEN's avatar
XQSHEN
Icon for Occasional Contributor rankOccasional Contributor
6 years ago
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problems find when simulate UniPHY + DDR2

IP: UniPHY with DDR2 controller Quartus Prime Standard 18.0 Simulation: Nios 2 + Uniphy + Micron DDR2 (MT47H128M16) Modelsim-intel is used. Problem: it stops during ddr2 initialization phase....
  • IntelSupport's avatar
    IntelSupport
    6 years ago

    Hi Xiaoqiang Shen,

    UniPHY simulation does not adhere to the initialization timing to speed up the simulation so it will fail when using the Micron memory model. I assume the simulation passes with the DDR2 example design with Intel generated memory model. As a workaround, you can comment out the initialization time check in the Micron memory model.

    Hope this helps.

    Thanks,

    Rashmi



IntelSupport's avatar
IntelSupport
Icon for Contributor rankContributor
6 years ago

Unfortunately, UniPHY simulation does not adhere to the initialization timing to speed up the simulation so it will fail when using the Micron memory model.


Which simulation option they have selected. You probably have "skip calibration" selected which is the default.Please change the setting to "full calibration" to get past the error but it will take forever (~4 days) to complete.



XQSHEN's avatar
XQSHEN
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

I used +define+ALTERA_ALT_MEM_IF_PHY_FAST_SIM_MODEL=0 in related files nios_mem_if_ddr2_emif_0_p0.sv and nios_mem_if_ddr2_emif_0_pll0.sv.

And modelsim shows message: # Using Regular core emif simulation models.

But it still doesn't work.

  • Rashmi1's avatar
    Rashmi1
    Icon for Occasional Contributor rankOccasional Contributor
    6 years ago
    Does this latest sim run much longer than the previous simulation? It should if you are running full calibration
    • Rashmi1's avatar
      Rashmi1
      Icon for Occasional Contributor rankOccasional Contributor
      6 years ago

      Does this latest sim run much longer than the previous simulation? It should be running full calibration

      Can you please check how long mem_reset is asserted? It should stay low for at least 200usec in full calibration mode

      • XQSHEN's avatar
        XQSHEN
        Icon for Occasional Contributor rankOccasional Contributor
        6 years ago

        It stops at the same position. Nothing changed.