problem with sdram on nios2 dev kit

Altera_Forum · ‎07-03-2006

Hi

I have some problems getting started with my nios2 dev-kit.

The dev kit is a stratix2 EPS2S60 board.

I have tried with both verison 5.1 and 6.0 of the dev-tools.

In the nios2 ide "getting started" tutorial I got this error message as I tried

to run my project as nios2 hardware:

Using cable "USB-Blaster ", device 1, instance 0x00
Pausing target processor: OK
Reading System ID at address 0x021208B8: verified
Initializing CPU cache (if present)
OK
Downloading 01000020 ( 0%)
Downloaded 1KB in 0.0s        
Verifying 01000020 ( 0%)
Verify failed between address 0x1000020 and 0x10000DF
Leaving target processor paused

A memtest gave me the following:

Testing RAM from 0x1000000 to 0x1FFFFFF 
 -Data bus test passed 
 -Address bus test failed at address 0x1000004 
Press enter to continue...

onchip_ram, ext_ram and ext_flash works fine, but the sdram is no-go.

I appreciate any help.

Altera_Forum · ‎07-07-2006

Good news!

I solved the problem.

I adjusted the pll clock phase shift for sdram_clk_out

from default -3.50ns to -4.0ns

Testing RAM from 0x1000000 to 0x1FFFFFF
 -Data bus test passed
 -Address bus test passed
 -Byte and half-word access test passed
 -Testing each bit in memory device. . .  passed
 -Testing memory using DMA.  passed
Memory at 0x1000000 Okay
Press enter to continue...

Strange that the dafault settings didn't work on a development board...