Device Driver problem

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originally posted by kuni124d+jun 30 2006, 01:44 pm--><div class='quotetop'>quote (kuni124d @ jun 30 2006, 01:44 pm)</div>

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<!--quotebegin-hippo@Jun 30 2006, 07:02 AM

set bit 31 of the memory address , ie | 0x80000000 , to uncache the access in both driver and user app.

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Thanx , i shall follow your instructions. But , the memory location is in "On- chip" memory , which I beleive is not cached. There could be some other problem

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Why do you mean the onchip memory is not cached?

If you have d-cache in nios2, everything is cached unless you turn on bit31 of the address or use IORW macro .