topic Re: Problem with #define in microcontroller header file in CodeWarrior for MCU

Problem with #define in microcontroller header file

matheus — Fri, 04 Apr 2008 20:49:11 GMT

Hi All!

I have a problem with #defines in my application. It seems that my application don't recognizes mc9s08ac16.h #defines. My code seems like this:

#include "spihw.h" //#include <mc9s08ac16.h> is in spihw.h

Hw_Init(){

UINT8 atualiza = 1;

do{

        if(atualiza)
        {
            atualiza = 0;
            ui16OldTime = TPM1CNT;
        }

        if( (TPM1CNT - ui16OldTime) > TPM1_1MS)
        {
            atualiza = 1;
            LED00 = !LED00;
        }
    }while(1);

}

When this code is running the ui16OldTime value is always zero and when I try watch TPM1CNT value data window shows a message: "undefined expression (unknown identifier)", but TPM1CNT is declared in mc9s08ac16.h.

Someone know what is happening with my application?

Thanks,

Matheus.

Re: Problem with #define in microcontroller header file

allawtterb — Fri, 04 Apr 2008 22:04:48 GMT

The actual variable behind TPM1CNT in the header is probably _TPM1CNT, try adding this to your watched expressions. The debugger will not show the value of defines, these are only seen by the pre-processor. TPM1CNT is replaced with whatever it is defined is, probably _TPM1CNT.Word.

Re: Problem with #define in microcontroller header file

fabio — Fri, 04 Apr 2008 22:22:54 GMT

Hello Matheus,

Did you initialize TPM1? Out of reset, TPM1SC = 0x00 meaning that the TPM clock source is disabled (the timer does not increment).

Regarding the TPM1CNT symbol, I agree with Allawtterb. The correct debugging symbol is _TPM1CNT.

Best regards,

Re: Problem with #define in microcontroller header file

matheus — Fri, 04 Apr 2008 23:41:28 GMT

Hello allawtterb!

You are right. I used _TPM1CNT.Word instead of TPM1CNT and the debugger showed me the correct value of PM1CNT.

Thanks a lot,

Matheus

Re: Problem with #define in microcontroller header file

matheus — Fri, 04 Apr 2008 23:52:38 GMT

Hello Fabio!

Yes I did. I was not using the _TPM1CNT debbuging symbol. When I used _TPM1CNT.Word instead of TPM1CNT I saw the correct value.

Thanks for fast answer,

Matheus.