Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
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
9 years ago

So the mSGDMA is working great, but now it almost looks like I'm seeing endianess issues when reading back the data in to the HPS. Has anyone seen this? In SignalTap the signals are definitely correct, but when reading the values back in the HPS, it looks like the endianess is flipped.

As the Nios and HPS are little-endian, does the mSGDMA do any sort of internal conversion to handle this?