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Altera_Forum's avatar
Altera_Forum
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12 years ago

Custom instruction to access SDRAM

Hi, I'm inexperienced with FPGA's. I want to implement a custom instruction, which calculates an SDRAM address and writes something into. I use NIOS II e and SDRAM controller IP. My question...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

I believe what you would like to do can be accomplished with a single new IP component which has two interfaces:

  1. A custom instruction slave connected to the NIOS

  2. An Avalon-MM Master connected to the SDRAM controller (or, any bridge you have in front of the SDRAM controller)

It is not commonly done, but I expect there is nothing preventing you from doing this.