URGENT: IOWR problem

What memory is your code running from? If your code is also in SDRAM starting at address zero, then your test code would be overwriting itself. Testing from just 0 - 9 may still work as it might only be overwriting the reset vector location or some other small portion of memory no longer required by your code to continue proper execution.

yes, my code is in SDRAM too... how do i know if my code is starting at address zero too? besides, how to fix it? how do i know my code ends at which address? sorry, i am new to this things. thanks!

Why do you want to write to the SDRAM using IOWR macros, instead of using static variables or allocated memory?

As Daixiwen said, there's normally no reason to use IOWR/IORD to access SDRAM. Anyway, if you really want to use IOWR you must be sure you are writing to a free ram area; you can do something like this:

int sdram_array;
for(x = 0;x < 100; x++){
   IOWR(SDRAM_BASE, &sdram_array, x);
   /* this is equivalent to   sdram_array = x  */
   }

Daixiwen: Thanks for the info. I am new, so i am not sure there is some other ways to write to SDRAM? Can you please provide me with more info or maybe tutorials? thanks!

thanks for the reply