Same response Shawn ::
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address@hidden:~$ avr-gcc -mmcu=atxmega256a3bu ledblink.c -o ledblink.o | grep 256
In file included from ledblink.c:2:0:
/usr/lib/avr/include/avr/io.h:428:6: warning: #warning "device type not defined" [-Wcpp]
# warning "device type not defined"
^
In file included from ledblink.c:3:0:
/usr/lib/avr/include/util/delay.h:90:3: warning: #warning "F_CPU not defined for <util/delay.h>" [-Wcpp]
# warning "F_CPU not defined for <util/delay.h>"
^
/usr/lib/avr/include/util/delay.h:95:3: warning: #warning "Compiler optimizations disabled; functions from <util/delay.h> won't work as designed" [-Wcpp]
# warning "Compiler optimizations disabled; functions from <util/delay.h> won't work as designed"
^
ledblink.c: In function ‘main’:
ledblink.c:16:9: error: ‘DDRC’ undeclared (first use in this function)
DDRC |=1<<PC2; /* PC2 will now be the output pin */
^
ledblink.c:16:9: note: each undeclared identifier is reported only once for each function it appears in
ledblink.c:16:19: error: ‘PC2’ undeclared (first use in this function)
DDRC |=1<<PC2; /* PC2 will now be the output pin */
^
ledblink.c:19:17: error: ‘PORTC’ undeclared (first use in this function)
PORTC &= ~(1<<PC2);/* PC2 LOW */
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Clearly either I am missing something, or something is really screwed up :-\