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Altera_Forum's avatar
Altera_Forum
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17 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
14 years ago

You set the byte enables on the master side, I haven't used that bridge before but it should be possible to do 8, 16, and 32 bit (aligned) accesses. You don't have to use 8 or 16 bit accesses for the narrow slave, if you perform a 32-bit access the interconnect will chop that up into two sequential 16-bit accesses for you. If you created the component with the slave port and have not included byte enables I highly recommend doing so, I have seen lots of people shoot themselves in the foot by not including byte enables on their IP.