AVR-Chat

At 03:50 PM 11/07/2007, you wrote:
>The code that I'm using to handle the WDR is a very old

That COULD be the problem, I think the M128 needs a different
init than the older chips.

This is what I had in one project when I had to use either old 8515 or new
M8515. Of course I don't know if this is true in your case. :-)

.if     mega8515
         clr             r16
         out             mcusr,r16                       ;Clear reset flags
         ldi             r16,(1<<wdce)|(1<<wde)          ;Start WD 
change timed  sequence
         out             wdtcr,r16
         ldi             r16,(1<<wde)|(1<<wdp2)|(1<<wdp1)|(1<<wdp0)
         out             wdtcr,r16
.else
         ldi             r16,(1<<wde)|(1<<wdp2)|(1<<wdp1)|(1<<wdp0)
         out             wdtcr,r16
.endif

 From the data sheet:

1. In the same operation, write a logic one to WDCE and WDE. A logic 
one must be
written to WDE regardless of the previous value of the WDE bit.
2. Within the next four clock cycles, in the same operation, write the WDE and
WDP bits as desired, but with the WDCE bit cleared.

Regards

John Samperi

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