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Altera_Forum's avatar
Altera_Forum
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16 years ago

avalon mm byte enable

In the project we are currently working on, we want to read and write pixels to external DDR SDRAM. We need to be able to use byte-mask / byte-enable bits to not overwrite some previously writt...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

That is not supported but if you aligned your pixels to 4 byte boundaries it will probably work. That said I would just waste some memory and just store your pixels as 32 bit data. Then your master can access multiple pixels without having to worry about unsupportted byte enables. If you look at the video NEEK designs you'll see this achieved with the streaming ARGB to RGB (or whatever it is called)