--- Quote Start ---
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)
--- Quote End ---
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)
--- Quote Start ---
You can possibly try these:
- run from onchip memory and perform a sdram test by writing and reading back data
--- Quote End ---
Please see the picture, Cris. Thank you :o
--- Quote Start ---
- keep code in sdram but in Nios properties, set reset and exception vectors to onchip memory
--- Quote End ---
--- Quote End ---
tested! Error Message :
verifying 00800000 ( 0%)
verify failed between address 0x800000 and 0x8001af
leaving target processor paused Thank you,
Yuyex:o
Honored Contributor
