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Altera_Forum
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8 years ago

Nios II read/write to DDR3 using external DDR3 controller

Hello, I have a simple Qsys SoC consisting of Nios II, on-chip memory, 2 Avalon MM masters and 1 AXI slave. I have connected the Nios II to each Avalon MM master (one for read and one for...
Altera_Forum's avatar
Altera_Forum
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8 years ago

Sorry about the image. Hopefully the one I have uploaded now is visible. In the SoC, the Nios II instruction and data master are connected to on-chip RAM, and the data master is also connected to the 2 Avalon MM master agents. The master agents are in turn connected to an AXI slave, the AXI interface of which is exported for connecting to the external DDR3 controller. I have programmed the OCRAM with a .hex file generated in Eclipse. In this program, I'm trying to get the Nios II to write to DDR3. But it doesn't seem to work. https://www.alteraforum.com/forum/attachment.php?attachmentid=14473