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Altera_Forum
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20 years ago

DMA SDRAM burst read not working

I just posted this as a support service request... We are using a SOPC Builder-instantiated DMA controller to interface between the SDRAM and a small on-chip cache of 1600 bytes. The DMA is co...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

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originally posted by slava+mar 17 2006, 12:21 am--><div class='quotetop'>quote (slava @ mar 17 2006, 12:21 am)</div>

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<!--quotebegin-rhaikh@Mar 16 2006, 08:28 PM

check it:

http://www.yikes.com/~ptolemy/sopc_system.jpg (http://www.yikes.com/~ptolemy/sopc_system.jpg)

http://www.yikes.com/~ptolemy/signaltap_waveform.jpg (http://www.yikes.com/~ptolemy/signaltap_waveform.jpg)

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=13516)

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SDRAM controller from SOPC builder does not work in burst modes.

I have tried to read burst from sdram and I had same problems.

<div align='right'><{post_snapback}> (index.php?act=findpost&pid=13539)</div>

[/b]

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The exact same configuration works in other designs: it used to work on this board, and it continues to work on the devkit. You&#39;re right though, it is problematic.