9S12x Interrupt vector address in .prm file or in code?

[jcdammeyer]

I've done several projects on the 9S12XDP512 and in each case I've used the .prm file to specify the names of the interrupt handling functions.

/* use these definitions in plane of the vector table ('vectors') above */

VECTOR 0 _Startup /* reset vector: this is the default entry point for a C/C++ application. */

//VECTOR 0 Entry  /* reset vector: this is the default entry point for an Assembly application. */

//INIT Entry      /* for assembly applications: that this is as well the initialization entry point */

VECTOR ADDRESS 0xFF78     PIT1_ISR            

VECTOR ADDRESS 0xFF7A     PIT0_ISR            

VECTOR ADDRESS 0xFFD6     COM1Interrupt

VECTOR ADDRESS 0xFFD4     COM2Interrupt

This is all based on the original example code from the Softec Development board I started with.

The linker fills in the rest of the table with FFFF so a spurious interrupt should reset the application since the entry at that RESET vector is 0xC000.

Is there a better way to do this or should I care?

In the timer.c file I have:

#pragma CODE_SEG __NEAR_SEG NON_BANKED

interrupt void PIT0_ISR(void) {

     TickCount++;

	PITTF = 0x01;
}

#pragma CODE_SEG DEFAULT

In order to access the variable TickCount I disable interrupts since TickCount is a 16 bit variable and could change between reading it and clearing it.

// disable timer interrupts

    PITINTE &= DELAY_TIMER_DISABLE;

    // Update local copy.

    t_Delay = TickCount;

    TickCount = 0;

    // re-enable timer interrupts

    PITINTE |= DELAY_TIMER_ENABLE;

Any comments on the above.  Is there anything unique in the 9S12 family that I'm missing here?  Specifically when I see the comments in the .prm file about OSEK etc.

ENTRIES /* keep the following unreferenced variables */

    /* OSEK: always allocate the vector table and all dependent objects */

    //_vectab OsBuildNumber _OsOrtiStackStart _OsOrtiStart

END

Thanks

John

.

[ZhangJennie · Accepted solution]

hi John. !

the interrupt vector address is correct in your code.

please perform interrupt per attached technical note.

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ZhangJun