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Altera_Forum
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13 years ago

SGDMA with pipeline bridge inside a Qsys subsystem

Hi I'm trying to get an SGDMA core to run inside a QSys subsystem which has its own sgdma desc memory. And the subsystem is connected to the outside system with nios using an avalon mm pipeli...
Altera_Forum's avatar
Altera_Forum
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13 years ago

For those who read this later.

Just be careful about the source/destination addresses you give to the sgdma core.

They have to be the ones marked as viewed by sgdma ip core in system.h

The descriptor address I used was initialized as follows

alt_sgdma_descriptor *transmit_descriptors = (alt_sgdma_descriptor *) SUBSYSTEM_1_SGDMA_DESC_BASE; // This is a memory inside the subsystem

It works.

Cheers

ZubairLK