SOPC with SDRAM Contoller

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If you haven't already done it, please check:

- pin assignments

- sdram controller properties in sopc builder; they must match your sdram specifications

- timing analysis (although I think you shouldn't have problems at 50MHz)

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I have checked them in these two days :wacko: and I am sure for all of the specs EXCEPT for the WRITE RECOVERY TIME which cant be found from the data sheet, so I leaved it on the default value.

(FYI, I have attached DE0 SDRAM timing spec on the top of this topic :o)

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You can possibly try these:

- run from onchip memory and perform a sdram test by writing and reading back data

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Please see the picture, Cris. Thank you :o

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- keep code in sdram but in Nios properties, set reset and exception vectors to onchip memory

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tested!

Error Message :

verifying 00800000 ( 0%)

verify failed between address 0x800000 and 0x8001af

leaving target processor paused

Thank you,

Yuyex:o