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IOWR Macro to access 64-bit QDRII

Altera_Forum
Honored Contributor II
‎07-02-2011 12:02 AM
1,169 Views

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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Altera_Forum
Honored Contributor II
‎07-02-2011 10:28 AM
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Just a guess: I know that there is IORD_32DIRECT(), maybe such macro for 64bits? :)

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Altera_Forum
Honored Contributor II
‎07-04-2011 08:32 AM
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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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