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Valued Contributor III
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IOWR Macro to access 64-bit QDRII

32-bit Nios II is intended to access a 64-bit QDRII using IOWR and IORD macros. Can anyone tell me how should I do this? Noticed that now the access is as such:- 

32-bit nios ii writes to 64-bit qdrii and 64-bit qdrii writes to 72-bit afi 

 

Thanks, 

Carid
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Valued Contributor III

Re: IOWR Macro to access 64-bit QDRII

Just a guess: I know that there is IORD_32DIRECT(), maybe such macro for 64bits? :)

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Valued Contributor III

Re: IOWR Macro to access 64-bit QDRII

The Nios CPU always sees its data space as 32 bits so a 64-bits read/write operation will have to be split up into two 32-bit operations.

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