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Altera_Forum
Honored Contributor
Honored ContributorTSE with the dual SGDMA modules...
Hi All, I guess I am uncertain how the TX/RX dma's work on the TSE - specifically I am looking to be able to read a few bytes out of a packet, use these bytes to select a memory mapped data str...
Altera_ForumHonored Contributor
Honored ContributorYou would have to modify the TSE driver to do that, but it should be possible.
You could prepare a first descriptor for the SGDMA asking to load only the first bytes you require, and then when you decide what to do with the data, create a second descriptor to load the remaining bytes in the packet. You can have a look at the sgdma datasheet (http://www.altera.com/literature/hb/nios2/qts_qii55003.pdf) to see how it works.
