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Altera_Forum
Honored Contributor
Honored ContributorCan I pass multi inputs for SGDMA?
Hi all, I just wonder that I can pass multiple inputs/outputs for SGDMA (Sink/Source). Because I build a custom SGDMA protocols that connect to mm_to_st and st_to_mm. Thank you, Sean
Altera_ForumHonored Contributor
Honored ContributorUnfortunately I don't have an example. If you need to see how to implement these by hand you can take a look at the "one_to_two_demux" and "two_to_one_mux" cores in this design: http://www.altera.com/support/examples/design-entry-tools/qsys/exm-qsys-tut.html
By the way, if your output after all the streaming stuff is equal in length to the input you might find this mSGDMA easier to work with since it exposes ST ports between the read and write masters so that you can do the data movement as a single MM to MM transfer: http://www.altera.com/support/examples/nios2/exm-modular-scatter-gather-dma.html If you turned on packet support and coded a channel number at the beginning of the buffer that would be an easy way to route the ST datagram through your custom ST components. Food for thought....
