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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



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.