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Altera_Forum's avatar
Altera_Forum
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14 years ago

booting from a tightly coupled memory

INTRO: I'm trying to desing a system where two NiosII share the same instruction TCM. I need that for the design to fit the available M9K and achieve the required performance. It should work as...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Did you remember to point the Nios II reset vector at the TCM? It should be just a matter of making sure reset is set appropriately and having .text pointed at the TCM (or at least the section of code you plan on putting in the TCM).

Also I recommend using two TCMs, one per CPU while you are prototyping your software so that you can hook the 2nd memory port to the data master. That way you can make code changes and download them to the board. Then when you are finished with the software pull out one of the TCMs and hook up the 2nd CPU to the shared TCM.