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Altera_Forum's avatar
Altera_Forum
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16 years ago

SGDMA dropping two bytes just before (not at) end of transfer

I'm having problems with an SGDMA controller connected up to a TSE ethernet MAC. It's a 32-bit memory to stream SGDMA set to accept misaligned transfers. I'm trying to transmit a packet produce...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

It's been a while but I did a lot of early work with the TSE MAC and helped isolate some issues with it. I remember trying to get the SGDMA controllers to properly perform unaligned data transfers in conjunction with the TSE MAC but never could get it working. As dim99 mentioned, the TSE megawizard has an option to align the packet headers to 32-bit boundaries to avoid the need for unaligned transfers at the SGDMA controller.

Jake