topic Re: MC9S12C32 Interrupts In CodeWarrior in S12 / MagniV Microcontrollers

MC9S12C32 Interrupts In CodeWarrior

Assembly — Tue, 06 Feb 2007 04:18:20 GMT

I Have been able to run interrupts on my Microcontroller but all of the sudden th same interrupts wont work anymore. I am assigning the vector address in the linker file as well as the interrupt Service routine name. I am using the command enable Interrupts in CodeWarrior. I am calling the interrupt service function the same as the one in the linker file. I am using the function Header interrupt void function_Name(void).

Do you have any sugestions as to why the interrupts arnt working any more.

Re: MC9S12C32 Interrupts In CodeWarrior

JimDon — Wed, 07 Feb 2007 04:51:53 GMT

Which interrupt(s) are we talking about.
Maybe the device that was giving the interrupt is no longer enables/set up properly.

Re: MC9S12C32 Interrupts In CodeWarrior

Assembly — Wed, 07 Feb 2007 08:52:31 GMT

The Timer Overflow and the Timer Output Capture 0

Recentaly I tried a couple of things and i notced that if you set the output on Capture 0 the led will togle but still wont run the interupt service routine.

Atached is a coppy of the scource code that i wrote

Re: MC9S12C32 Interrupts In CodeWarrior

JimDon — Wed, 07 Feb 2007 09:11:00 GMT

Try this in the int handler

TC0 += PERIOD ;

and

TC0 = TCNT + PERIOD;
When you init it.

Also, you don't need
TFLG1 = 0x01;
in the hander - writing to TC0 clears and rearms the int.

Try something less than FFFF for the period.
Not sure if that will cause a problem, but it might.

If you need longer periods, use a sub counter like:
int subCntr; // global scope

(in the int handler)
++subCntr;
if( subCntr == 100 ) // pick a number that gives you the desired delay.
{

// write to the leds or what ever.

subCntr = 0;
}
(rest of handler)

Message Edited by JimDon on 2007-02-0608:20 PM

Message Edited by JimDon on 2007-02-0608:22 PM