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Altera_Forum
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14 years ago

AVALON-MM Master Template on DE2

I'm attempting to use the Avalon-MM Master Templates located at: (altera.com/support/examples/nios2/exm-avalon-mm.html) in order to control some external SDRAM on the Terasic DE2 Development board an...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Hi,

I've run into the same (similar) problem with trying to use QDRII SRAM interface (AValon-enabled) in Qsys with Aletra's MM master read/write templates. The sims run correctly, but when I go to hadware, write transactions complte OK, but reads never return (control_done signal goes low upon asserting 'go' and never goes high again). I take it that the waitrequest from the fabric is staying high. Any clues?

The fifos are defined size 32 (someone had an issue with size '4'). In the sims the interface takes a while to complete calibration. Is it possible the same happens in real life, i.e. calibration never succeeds?

I'm using straix iv 100g dev board.

Thanks