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Altera_Forum's avatar
Altera_Forum
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16 years ago

EPCS4 data format?

I have an EPCS4 on a board with a Cyclone II. I'm using the pof file to load the EPCS4 and that all works fine. I have a processor on the board which then goes to read the EPCS4 to save it on an SD C...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

No need to consult th SRunner software. I've encountered this situation before, but I just could not put my finger on the definitive statement.

Thanks for clearing that up.

To sumarize:

  1. In writing from a file (pof or hexout) to an EPCS4 I should send the data from the file to the EPCS4 LSB first.

  2. In reading data from the EPCS4 I will receive it LSB first assuming it was written according to item 1 above. To rewite this data to a standard file (pof or hexout) I will need to either reverse the bits if shifting from right to left, or equivalently shift them from left to right during byte assembly.
I think that just about covers it.