Compile a program for attiny13

This is a description how to compile a program for the attiny13 processor. It is based on SUSE 12.2. Other distributions may work similar.

• install cross-avr-binutils

yast -i cross-avr-binutils

• install cross-avr-gcc from http://software.opensuse.org/package/cross-avr-gcc
• install avr-libc from http://software.opensuse.org/package/avr-libc
• create a path /cross

mkdir /cross

• link the files to the respective places

ln -s /usr/bin/avr-as /cross/as
ln -s /usr/bin/avr-ld /cross/ld

• tell the system to use these

export PATH=/cross:$PATH

• now you can build this: http://gitorious.org/avr-gcc-examples/avr-gcc-examples/trees/master/attiny13-blink

beep

Here is my program for an ATtiny13 to beep with a frequency of 500Hz:

beep.c

#include <avr/io.h>
#define F_CPU 1000000UL
#include <util/delay.h>

int main(void)
{
  DDRB = 8; # PB4 will be sender, all other ports receiver
  while (1)
  {
    PORTB = 8;
    _delay_ms(1);
    PORTB = 0;
    _delay_ms(1);
  }
  return 0;
}

Makefile

MCU=attiny13
CC=avr-gcc
OBJCOPY=avr-objcopy
CFLAGS=-g -mmcu=$(MCU) -Os

all: beep.hex

beep.hex : beep.o 
	$(OBJCOPY) -R .eeprom -O ihex beep.o beep.hex 
beep.o : beep.c 
	$(CC) $(CFLAGS) -Os -o beep.o beep.c
clean:
	rm -f *.hex *.o