AVR-Chat

On Fri, Apr 16, 2004 at 06:48:31AM -0700, chris atwan wrote:

> I verified that the JTAGEN fuse is "1".  Any ideas??

Is there any way in AVR Studio to print out the 8-bit hex value of all
the fuse bytes?  There are three - the Extended Fuse, High Fuse, and
Low Fuse.

I'm asking these questions to ensure that the fuse bits are set
appropriately.  Due to the "programmed=0" and "unprogrammed=1"
semantics, and AVR Studio's "checked=0", and "unchecked=1" - it is
sometimes not clear what their actual settings are.

In AVR Studio, is the check-box for the JTAGEN fuse checked or
unchecked?

If it is "unchecked", your problem lies elsewhere.  If it is
"checked", then uncheck it, apply the new fuse bit settings, and try
your keypad interface code again.  I'm assuming you are not actually
using a JTAGICE programmer/debugger.  If you are, then you are stuck -
you can't use the upper nibble of PORTF since it is being used for the
JTAG interface.

-Brian
-- 
Brian Dean
http://www.bdmicro.com/