Watchdog functions

desponia_ — Wed, 22 Mar 2006 16:55:41 GMT

Hello

I m using CW V 3.1 for programmming and debug MC9s12DG128 microcontroller. When i use __RESER_WATCHDOG(); functions in main.c it gives an error that " C10011 : ' :' expected to delimit label". but all of helper application or example application uses it. Could you say me what is wrong?

And i m also using _FEED_COP. But there is no error if i use it.

the diffirences beetwen them is that __RESET_WATCHDOG(); function is defined in "mc9s12dg128.h" file whereas the _FEED_COP() function is defined in "hidef.h" file.

these are functions declarations;

#define __RESET_WATCHDOG() {asm sta COPCTL;} // in the mc9s12dg128.h

#define _FEED_COP() ((*(volatile unsigned char*)_COP_RST_ADR)= 0x55,

(*(volatile unsigned char*)_COP_RST_ADR)= 0xAA)

and also i think that it is wrong to use __RESET_WATCHDOG(); function because you are not giving 0x55 and 0xAA value with in turn in which shape has been decleared in datasheet.

am i rigth to think that the _FEED_COP(); function must be used to reset watchdog.?

best regards.

Re: Watchdog functions

CompilerGuru — Fri, 24 Mar 2006 19:45:32 GMT

Use the _FEED_COP, which works.
The implementation of __RESER_WATCHDOG is for a HC08, not for a HC12, so better do not use it. The actual error message you see is because it used the HC08 STA and not the HC12 STAA instruction in the macro.

>but all of helper application or example application uses it

Actually I did (fortunately) not find any use of __RESER_WATCHDOG in the HC12 V3.1 installation. Where did you see those usages? Maybe in HC08 code?

Daniel

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Watchdog functions

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