06-23-2012 04:26 PM
Dear all,I have a Qsys system with PCie, user logic, DDR2 SDRAM. I use user logic to continuously write/read a DDR2 SDRAM. It seems working properly. I use windriver to write/read from DDR2 SDRAM, it seems working properly too. Now I want to add sgdma to do fast communication between PC and DDR2 SDRAM. After I add sgdma, and connect its to DDR2 SDRAM, the continuously writing/reading seems stop even I don't issue a DMA command yet. Why the modular sgdma stops/interferes my reading/writing to DDR2 SDRAM using user logic? anyone can give me some advices? Thank you very much!
06-27-2012 05:11 AM
Interesting question... If it's not working, then maybe it is not configured correctly, isn't it?Read the documentation and check all the required parameters. Also take design examples into consideration.