IOWR problem

[Altera_Forum]

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]

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().