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Altera_Forum's avatar
Altera_Forum
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12 years ago

DDR2 with Cyclone V

Have anyone been able to control a DDR2 SDRAM using the UniPHY Megacore IP from Cyclone V??

Im trying to do so, I have use this same memory with a Cyclone III before and im using the same circuit design, same time parameter, everything. But no matter how much I tried, the memory seem to not respond ( I tried 2 different FPGAS and 2 different memories)

Do any one has some idea about this? Has anyone controlled a DDR2 with Cyclone V?

Thanks all for the nice help,

Bart

6 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    12 years ago

    Helo,

    Do you have our Cyclone V dev kit? Did you try to run the simulation first using the generated example design? Make sure the PHY calibration is passing as well as the user mode (read / write).

    After that you may jump into hardware testing and you may use the EMIF toolkit to check if your design is working.

    Hope this helps.
  • Altera_Forum's avatar
    Altera_Forum
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    12 years ago

    Hello guys,

    I am also facing difficulties to get the DDR2 uniphy controller work. Calibration is failing at the last steps: "Write Calibration - Per-bit write deskew failure". (message from EMIF toolkit)

    Any idea what I should check?
  • Altera_Forum's avatar
    Altera_Forum
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    11 years ago

    Can you try to reduce the interface speed for example from 400MHz to 200MHz?

    And full compilation did you see any timing violation reported inside Quartus II?
  • Altera_Forum's avatar
    Altera_Forum
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    11 years ago

    I reduced the speed interface to 200MHz, I can validate the timing, but the calibration still fails.

    So that I can pass the calibration I've had to configure the "Advanced Clock Phase Control" parameter:

    "Additional Command And Clock Phase : 115 degrees".

    But then the timing analysis fails.

    Altera support answers was: Soft controller is not suppported for your speed grade 8 CycloneV (5CSEBA6U23C8).

    Very happy to know that at this step of the project...
  • Altera_Forum's avatar
    Altera_Forum
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    11 years ago

    Did you tried to run RTL simulation using modelsim or any other simulation tool?

    Check if the cal_successful signal is asserted or not.
  • Altera_Forum's avatar
    Altera_Forum
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    11 years ago

    I generated the "example project" from Qsys and ran the simulation on Modelsim. Calibration completed and the example ended successfully.