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Altera_Forum's avatar
Altera_Forum
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20 years ago

SDRAM - trouble !!!!!!!!!!!

I got BIG problem with nios2 project

I design board with SDRAM - developing was ok

After that i start serial production of this board

And 60 boards was maked without any problems

they all work correctly

BUT NOW I start new serial for 200 boards and got problem

with SDRAM memory - all boards hangs after some time

I guess that is SDRAM problem - but i don't know how to be sure about SDRAM timings - is they ok or not ?

All my fits without any reds int compilation reports of quatrus.

2 Replies

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

    What board are you using?

    I have with a StratiX II the problem that it crashes after some time, no idea what may cause this error.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    20 years ago

    are you using the same type of chip as on the first run and on the prototype board?

    if you are using a type of chip not included in the nios SOPC builder you will need to set your own timings, these can be found in the datasheet from the manufacturer

    also, are you sure it isnt a software problem causing the machine to fill up all its ram?