AVR-Chat

Tom

The only bit that has anything to do with interrupts in the
SREG is Bit7:GlobalInterruptEnable.  Are you doing all that
to try to set and clear Bit7? 

It would seem like it OUGHT to execute an ISR. Do you have
the  corresponding bits set in the timer? For a Mega16, its
the TIMSK (Timer Mask Register) and, after the timer event
happens, a bit is set in the TIFR (Timer Interrupt Flag
Register). This latter bit will be cleared when the ISR
executes.

Jim


On Fri, 05 Jan 2007 19:17:14 -0600
 Thomas Keller <tjkeller1@alltel.net> wrote:
> John.
> 
>      I didn't use an sei instruction,no. I set the
> appropriate bit in a 
> register, read in the current SREG vale, or'ed it
> together,t hen used an 
> out instruction to store the result in the SREG.  While
> unconventional, 
> it SHOULD have the same net result.
> 
> John Samperi wrote:
> >
> > At 07:32 AM 6/01/2007, you wrote:
> > >I cannot get the timer interrupt to work.
> >
> > You have NOT enabled the general interrupts as far as I
> can
> > see with a SEI instruction. This sets the general
> interrupt
> > bit. You will also need to set to the timer interrupt,
> don't have
> > time right now to go through your code :(
> >
> 

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