Forum Discussion

Honored Contributor

16 years ago

Cyclone III Starter Kit - DDR-SDRAM - help

I'm newbie user in FPGA and I need to read and to write in DDR-SDRAM from Cyclone III starter kit.

I altered the QB3 example (.bdf).

And I created a new project in Nios II loading the .ptf file from cycloneIII_3c25_start_niosII_standard_sopc.ptf.

I program a little code for test, bu I don't have success.

Somebody can help me ?

Thanks

Rester

Altera_Forum
Honored Contributor
16 years ago
It looks like a hardware problem on the sdram access.
Is the sof file the reference one given with the kit, or did you recompile it yourself?
Altera_Forum
Honored Contributor
16 years ago
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It appears memory bit failed to be verified at data bit 0x01 sort of msg in console
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I also had this problem once, the cause of this error was the use of a false base adress. When you are, for example, using a clock crossing bridge, you get an absolute and a relative base adress and it is very important to use the absolute base adress in the memtest application.

That solved the problem for me (I'm not a specialist myself, just trying to help...)

There's a picture of the SOPC builder in the attachment that shows what I mean.

Good luck!

Best,

Hans