HI all,
I have programmed ATMega8 in the past (worked great). I have purchased a
ATMega2560 board now and am trying to get my avr gcc tool chain to accept this
chip:
Makefile
==================
# AVR-GCC Makefile
PROJECT=toggle_led
SOURCES=main.c
HEADERS=
CC=avr-gcc
OBJCOPY=avr-objcopy
MMCU=atmega2560
CFLAGS=-mmcu=$(MMCU) -Wall -O2 -I /usr/local/avr/include
$(PROJECT).hex: $(PROJECT).out
$(OBJCOPY) -j .text -O ihex $(PROJECT).out $(PROJECT).hex
$(PROJECT).out: $(SOURCES)
$(CC) $(CFLAGS) -I./ -o $(PROJECT).out $(SOURCES)
program: $(PROJECT).hex
avrdude -p $(MMCU) -c avrispmkII -P usb -e -U flash:w:$(PROJECT).hex
clean:
rm -f $(PROJECT).out
rm -f $(PROJECT).hex
main.c
==================
#define F_CPU 16000000UL /* 16 MHz CPU clock */
#include <util/delay.h>
#define OUTPUTPORT PORTB
#define OUTPUTPIN PB7
int main (void)
{
DDRB = 0xff; // all outputs
while (1) /* loop forever */
{
if ((PORTB & _BV(PB7)) > 0) PORTB &= ~_BV(PB7);
else PORTB |= _BV(PB7);
delay_ms(500);
}
return (0);
}
When I try to make this project I get
-bash-3.2$ make
avr-gcc -mmcu=atmega2560 -Wall -O2 -I /usr/local/avr/include -I./ -o
toggle_led.out main.c
unknown MCU 'atmega2560' specified
Known MCU names:
avr2
at90s2313
...
attiny12
attiny15
attiny28
main.c:1: error: MCU 'atmega2560' supported for assembler only
main.c: In function 'toggleOutput':
main.c:19: error: 'PORTB' undeclared (first use in this function)
main.c:19: error: (Each undeclared identifier is reported only once
main.c:19: error: for each function it appears in.)
main.c:19: warning: implicit declaration of function '_BV'
main.c:19: error: 'PB7' undeclared (first use in this function)
main.c: In function 'main':
main.c:34: error: 'DDRB' undeclared (first use in this function)
main.c:45: error: 'PORTB' undeclared (first use in this function)
main.c:45: error: 'PB7' undeclared (first use in this function)
make: *** [toggle_led.out] Error 1
The chip atmega2560 indeed is not in the offered list!? I built my tool chain
as shown below! What am I missing? How can this be fixed?
Thanks a lot!!!
Andreas
********************************************************************************************************
We download http://ftp.gnu.org/gnu/binutils/binutils-2.24.tar.gz:
PREFIX=/usr/local/avr
export PREFIX
PATH=$PATH:$PREFIX/bin
export PATH
cd /usr/src
mkdir avr
cd avr
scp ahoesch@192.168.1.7:/home/ahoesch/Downloads/binutils-2.24.tar.gz .
gunzip binutils-2.24.tar.gz
gtar xvf binutils-2.24.tar
cd binutils-2.24
./configure --target=avr --program-prefix="avr-" --prefix=$PREFIX
make
make install
We download http://gcc.cybermirror.org/releases/gcc-4.3.3/gcc-4.3.3.tar.bz2:
cd /usr/src/
gtar xvf mpfr-2.4.0.tar
cd mpfr-2.4.0
./configure
make
make install
cd /usr/src/avr
mkdir avrgcc
scp ahoesch@192.168.1.7:/home/ahoesch/Downloads/gcc-4.3.3.tar.bz2 .
bunzip2 gcc-4.3.3.tar.bz2
gtar xvf gcc-4.3.3.tar
cd avrgcc
../gcc-4.3.3/configure --target=avr --prefix=/usr/local/avr
--enable-languages=c --disable-libssp --disable-shared --disable-libada
--disable-libssp --disable-nls --with-dwarf2 --with-gmp=/usr/local
--with-mpfr=/usr/local --prefix=/usr/local/avr
make
make install
pico /etc/default/login
pico /etc/default/su
PATH= ...:/usr/local/avr/bin
SUPATH= ...:/usr/local/avr/bin
Relogin to get the new PATH value.
which avr-gcc
We download
http://download.savannah.gnu.org/releases/avr-libc/avr-libc-1.8.1.tar.bz2:
cd /usr/src/avr
scp ahoesch@192.168.1.7:/home/ahoesch/Downloads/avr-libc-1.8.1.tar.bz2 .
bunzip2 avr-libc-1.8.1.tar.bz2
gtar xvf avr-libc-1.8.1.tar
cd avr-libc-1.8.1
./configure --host=avr --prefix=/usr/local/avr
make
make install
We sync avrdude-5.8 and arduino.sh from the 192.168.1.2
rsync -avz -e ssh arduino.sh avrdude-5.8 root@192.168.1.7:/usr/src/avr
and build as follows:
LIBUSB=/usr/sfw
export CPPFLAGS="-I${LIBUSB}/include"
export LDFLAGS="-L${LIBUSB}/lib"
make
make install
This installs
/usr/local/bin/avrdude
/usr/local/etc/avrdude.conf
We can now do
avrdude -c avrispmkII -P usb -p atmega8
...
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