Re: [avr-gcc-list] simple program

[Ian Caddy]

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)
>
>
>
>
>
>
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--
Ian Caddy
Goanna Technologies Pty Ltd
+61 8 9221 1860