IOWR problem

Question

Hello every body

I have problem in using the IOWR function in my code;

the problem is my code doesnot work when I write on base address 0 in my hardware as:

IOWR(AES_0_BASE,0,0); // doesnot work

but it work if i changed the base address to 32 as

IOWR(AES_0_BASE,32,0); // work proberly

however it also didnot work if i use :# define Cipherkey2_BASE AES_0_BASE+32

and i canot write on this base address as follow

IOWR(Cipherkey2_BASE,32,0); // doesnot work

what is the problem.

altera_forum · Answer

At a guess the address offset is sometimes multipled by 4.

The last line you are also trying to add the offset twice.

Personally i don't think the Altera IOWRxxx() do anything other than hide what is going on.

I also suspect you want to do 32bit accesses, I thought there was an IOWR32().

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