Re: [avr-gcc-list] simple program

[Timothy Smith]

Ian Caddy wrote:

> hi Timothy,
>
> You need to deifine the processor you are using when you call the 
> compiler using the -m field, example we use the Mega128
>
> -mmcu=atmega128
>
> on the compiler line.  Replace atmega128 with the processor that you 
> are trying to build.
>
> I hope this helps,
>
> Ian Caddy
>
>
> Timothy Smith wrote:
>
> > hi there i'm new to gcc and avr development and i've tried to make a
> > very simple program to turn on an LED connected to one of the pins.
> > cat led.c
> > #include <inttypes.h>
> > #include <avr/io.h>
> >
> > int main(void)
> > {
> >    sbi(DDRD, 1);
> >    outb(PORTD,1);
> > }
> >
> > and below you can see the error. i also tried i simple test program i
> > downloaded and i got similar errors, so i'm not sure what i'm doing 
> > wrong?
> >
> > titan# avr-gcc led.c
> >
> > In file included from led.c:2:
> > /usr/local/lib/gcc/avr/3.4.4/../../../../avr/include/avr/io.h:252:6:
> > warning: #warning "device type not defined"
> > led.c: In function `main':
> > led.c:6: error: `DDRD' undeclared (first use in this function)
> > led.c:6: error: (Each undeclared identifier is reported only once
> > led.c:6: error: for each function it appears in.)
> > led.c:7: error: `PORTD' undeclared (first use in this function)
> >
> >
> >
> >
> >
> >
> > _______________________________________________
> > AVR-GCC-list mailing list
> > address@hidden
> > http://lists.nongnu.org/mailman/listinfo/avr-gcc-list

ok thanks, i got a little further
avr-gcc -mmcu=atmega32 led.c
/var/tmp//ccK1E1Fr.o(.text+0x12): In function `main':
: undefined reference to `sbi'
/var/tmp//ccK1E1Fr.o(.text+0x20): In function `main':
: undefined reference to `outb'
titan# avr-gcc -mmcu=atmega32 -m led.c

i've actually compiled and run an simple program with avr-gcc before, 
i'm just missing something obvious.