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Altera_Forum's avatar
Altera_Forum
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10 years ago

mSGDMA, Qsys, and Linux Integration

So I've been trying to get the Modular SG-DMA working in a Qsys project tied with Linux. I can get it to show up in the device tree, be recognized by Linux in /sys, and it looks like the memory mappi...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

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Hi Derim. I am not sure if this example design from Rocketboards (http://rocketboards.org/foswiki/view/documentation/datamoverdesignexample) would convey you the info that you need. But worth having a look :)

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Thanks-- I think I'm going to debug this a bit myself a bit more as I'm thinking that there's either an endianess or timing issue with the HPS driving the mSGDMA directly when mapping /dev/mem. It would be great to know if anyone else has tried it as the examples all rely on a Nios core, which should be redundant for an HPS-based design. Depending, of course, on one's application.