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Altera_Forum's avatar
Altera_Forum
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21 years ago

DMA

Hello, I want to make a stream from a PIO to the SDRAM. Knowing that the values on the PIO changes every 1/27Mhz, how can the DMA "know" when the data have been changed? http://forum.niosforum....
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

Kero,

The Nios sim I am running is okay with 50 Mhz to a 35 Mhz domain. Granted this is not P&R logic, but when I tried to run faster SOPC inserted wait states, I guess anticipating that this logic could not run faster.

In any case, what allowed my simualtion to run at speed was taking out the one clock write wait state.

I will see if this all works when I build real hardware.

-Baycool