#define register

[elee40]

I am using a freescale hc12 with codewarrior and trying to use a #define to refer to a memory register but continue to receive an error.  The error I get is

C2450: Expected ~ (IDENT auto const extern register static typedef volatile__interrupt friend inline operator virtual) .  I realize that these definitions are already in the header files....But for educational purposes I am trying to define my own references to the memory registers. Any help or suggestions would be much appreciated.

#include <hidef.h>      /* common defines and macros */
#include <mc9s12dt256.h>     /* derivative information */
#pragma LINK_INFO DERIVATIVE "mc9s12dt256b"

#define EPCNT 0x000000AC
EPCNT = 0; 

  Thanks

        Erik

[joeservo · Accepted solution]

try something like this:

#define PORTA    (*((volatile unsigned char*) (0x0000)))

what you are doing is only defining the number to a word.

you will probably get a link error about duplicate register names.  i usually change that to a warning and ignore.

[elee40]

Still getting error C2450: Expected: ~ (IDENT operator .  Also getting error C1067: Object is missing decl specifiers.  I looked at the help under these errors, but as I am not the greatest programmer the explanation was not clear. 

#include <hidef.h>      /* common defines and macros */
#include <mc9s12dt256.h>     /* derivative information */
#pragma LINK_INFO DERIVATIVE "mc9s12dt256b"

#define EPWM (*((volatile unsigned char*) (0x000000AC)))
EPWM = 0;

Erik

[elee40]

Ignore my previous message.  It works as long as I assign a value to the memory register inside of main().  Thanks again.  Erik