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Altera_Forum's avatar
Altera_Forum
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15 years ago

What is the ds_MISO signal in my SPI?

Hi,

I've implemented several SPI (Alter IP) interfaces in several SOPC systems.

Today, I made another one and this time I found an additional port that I don't know about. It is called ds_MISO (see attachment) and I found nothing in the documentation about it.

The funny thing is that the settings are exactly the same like in an other project where this extra port does not appear. I double checked the settings and can't see any differences.

Can somebody please tell me what is going on here?

Thanks,

Maik

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    i've seen this before, as i recall you can comment out the 2 lines containing ds_MISO in the generated HDL. i think it was fixed in later versions (which are you using?)

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

    Hi,

    thanks for your answer. So it is basically a bug, right?

    My Quartus version you can find in the attachment (9.1 SP 2).

    The funny thing is, that I use this Quartus Version for quiet a time now and never had this bug to appear.

    Maik
  • Altera_Forum's avatar
    Altera_Forum
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    15 years ago

    yes, its a bug. i think it was supposed to be fixed in 10.0

    it is strange that it seems to occur randomly