AVR-Chat

--- In AVR-Chat@yahoogroups.com, "Chuck Hackett" <egroupscdh@W...> 
wrote:

> ... JTAG ICE Cube ... STK500 and ECROS's
> Butterfly Carrier ... couple of problems ...

Thanks for this post, Chuck, this is the Internet at its best. If I 
do a good job I win, if I don't I lose. No hiding here!

Your start-up problems were, of course, unrelated to the ICE-Cube 
itself and you would have had the same issues with the Atmel JTAG ICE 
or any other. It should also be said that you solved the problems 
yourself though my brain certainly got a work out too!

Regarding the JTAGEN fuse, it is programmed in the chips as they come 
from Atmel, so the safest thing is to leave it alone. You do not need 
an ISP interface (in addition to JTAG) to program this fuse before 
you can start debugging. I agree that AVR Studio's fuse dialog can be 
confusing. The text does seem to say you have the fuse programmed, 
but this is only true if the checkbox at the left has the check mark 
in it. Otherwise, the text is precisely false! (Embedded Systems 
Programming magazine has a good article on user interface design this 
month.)

Graham.