typecast arm7 problem

joelcote · **Joined:** Wed Jul 29, 2009 5:06 pm **Posts:** 2

Hi

I use eclipse+yagarto+the exemple getting-started-project-1.3-at91sam7x-ek or RTOS "ARM7_AT91SAM7X256_Eclipse". I have a problem when I do this
char var1[2];
int short var2 = 0x1234;

*(int short*)var1 = var2

When I do the typecast the arm stop working if the address is odd. Can you tell me why the arm his not able to do that and how I can solve my problem, because with the Rabbit I was able to do that. I know I can use memcpy, but with this cast I save some CPU time.

stefan192 · **Joined:** Fri Oct 19, 2007 10:18 am **Posts:** 40

What happens if you cast the address of the first element?

Code:

*(int short*)(&var1[0]) = var2

joelcote · **Joined:** Wed Jul 29, 2009 5:06 pm **Posts:** 2

that doesn't work, it happen the same thing that my cast

typecast arm7 problem

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