Receiving bad data from FIFO with DMA transfer

Hello Henning, hello Bert.

First of all i like to thank you for your ideas.

<div class='quotetop'>QUOTE </div>

--- Quote Start ---

>If you have cache on Data, there are precautions to take to ensure the consistency of the external memory<[/b]

--- Quote End ---

i&#39;m using a Nios/f core. To check if it&#39;s a cache issue i downgraded the core and removed the cache. the error remains.

<div class='quotetop'>QUOTE </div>

--- Quote Start ---

In SOPC, check that your avalon switch fabric is properly connected to your DMA port.[/b]

--- Quote End ---

I will go after the connections (again and again :-)).

________

Meanwhile i verified that Memory is OK: I made a testpattern, which i copy from onchip ram to SDRAM and back, and from SDRAM to SDRAM.

Hopefully someone else has hint or better a solution.

Are there some known issues about configurations, which should be avoided.

I will check everything step by step...

Thanks

Helmar