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Altera_Forum
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22 years ago

sdram transfer

We have tested block transfer in sdram with memcpy() fonction on développement kit stratix 1S10 NIOS II with uclinux v1.1. The frequency CPU is 50Mhz. We obtained with nois ii /s (no data cac...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
22 years ago

Fred,

Thanks for the valuable info and please keep it coming!

The only way I found to copy/move memory around quickly was using the dma controller. memcpy and pointer arithmetic are slow. The dma controller uses the exact timing set in SOPC builder with no delay inbetween writes. Probably not your point here, but just in case.

If you want to post your test code, I'd be happy to run it on my NiosI and NiosII sdram systems. (Cyclone based, 75MHz)

Ken