Francois DUGUE

Exception processing

Discussion created by Francois DUGUE on Jul 21, 2010
Latest reply on Jul 24, 2010 by Francois DUGUE

Hi hall.

I'm working on a MCF51AC256.

ColdFire V1.


I've just experience with HCS08 (DZ60). I have made a very small RT system on I.

On HSC08, If you put "asm CLI" in the ISR, you can "preempt" it (the isr can be interrupted).


On a Coldfire, the Exception processing is more complex and i have some difficulty to do what i want...


In my application:

- i only run as supervisor

- I just use module ISR (FTM, SCI...)


What must i do to be sure that one ISR, for exemple TMP3_OVF ,  can be interrupted by others ?


Thank's in advance for your reply.