Compile a program for attiny13

This is a description how to compile a program, beep.hex in this example, for the attiny13 processor. It is based on SUSE 12.2. Other distributions may work similar.

Set up the compile environment

• 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

Understand the ATtiny13

The ATtiny13 is a processor. Its pins have the following meaning:

            ------
       PB0-|ATtiny|-GND
       PB1-|  13  |-PB4
       PB2-|      |-PB3
       VCC-|     o|-RES
            ------

There are 5 binary pins PB: PB0 till PB4. Then there is a pin to reset the processor, one voltage ground and one power supply (voltage common cathode VCC).

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

Build

To compile and link your software beep.hex issue the statement

make

And you will get a file beep.hex

Next step

Next step is to upload the file beep.hex to the ATtiny13, see attiny13.