using the '@' directive , to assign a variable to specific address

[lel_chen]

Hi,

    To assign a variable to a specific addresses, I tried using the '@' directive as given below:

int glob @0x0500 = 10;

This gives a compiler error which says:

"Expected ; instead of '@' ".

I tried with the C99 & GCC extensions enabled in c/C++ Language settings tab. This did not help.

Any solutions?

Thanks,

Chen

[CarlFST60L · Accepted solution]

This thread really has nothing to do with MQX

Firstly, you should define the varible as global i.e. outside your code body in the following format

volatile type name @0xADDRESS;         

//Example copied from one of my 8 bit processors I happen to have open

volatile unsigned char __far NV_ICSTRM_FAR @0x0000FFBE;

You could always check the header files for definitions of the standard ports and copy those

Message Edited by CarlFST60L on 2009-08-11 11:21 PM

[lel_chen]

Thank You,

        I hadnt declared it as a global - that was the mistake.

Thanks,

Chen