Program an ATtiny with Arduino
Follows are
directions for programming the ATtiny microcontrollers using the Arduino IDE.
In plain English, this is how to program 8-pin Atmel chips as you would
normally an Arduino. This is cool because the ATtiny is tiny, and - well - this
allows you to make tiny things that don't need a big ol' microcontroller.
The
instructions I have posted here are pretty much the same as instructions given
by the incredibly awesome High-Low Tech Tutorial. I posted my version of the
instructions here because I plan to make a couple of upcoming projects using
ATtiny chips and figured I would show my process.
Step 1: Go get
stuff
You will
need:
- Arduino
- Breadboard
- ATtiny85
(or ATtiny45)
- 10uF 16V
electrolytic capacitor
- 220ohm 1/4
watt resistor
- LED
- solid core
hookup wire
Step 2: Wire
the circuit
Connect the Arduino to the ATtiny as follows:
- Arduino +5V ---> ATtiny Pin 8
- Arduino Ground ---> ATtiny Pin 4
- Arduino Pin 10 ---> ATtiny Pin 1
- Arduino Pin 11 ---> ATtiny Pin 5
- Arduino Pin 12 ---> ATtiny Pin 6
- Arduino Pin 13 ---> ATtiny Pin 7
Step 3: Program
the Arduino
Select the
"ArduinoISP" sketch from the "Examples" menu.
Upload the
sketch to your Arduino as you would any other sketch.
Your Arduino
is now configured as a serial programmer that can program other chips.
Step 4: Filter
cap
Put the 10uF
capacitor between ground and the Arduino reset pin. Make sure to keep an eye on
the capacitors polarity (ground to ground!).
It is
rumored you only need this for the Arduino Uno, but I have found it helped
matters to include it with earlier versions as well. If you find that it is not
working in the next steps, simple remove it and see if that helps.
Step 5: ATtiny
core files
Take note of
your sketchbook folder from the Arduino preference menu.
Create a new
folder in your sketchbook folder called "hardware"
Then, go to
this page and download the file: attiny45_85.zip
Unzip this
file and leave it in the new hardware folder.
Finally,
restart the Arduino programming environment. The new cores should now be
loaded.
Note that
there are also core files for a number of other ATtiny chips.
Step 6: Program
the ATtiny
Select from
the top menu:
Tools -->
Board --> ATtiny85 (w/ Arduino as ISP)
(Of course,
you will want to select a different chip for this if you are using one.)
Then open
the basic blink example and change the pin number from 13 to 0.
Finally,
upload it as you would any other sketch.
It should
give the following error twice:
avrdude:
please define PAGEL and BS2 signals in the configuration file for part ATtiny85
avrdude:
please define PAGEL and BS2 signals in the configuration file for part ATtiny85
Simply
ignore the error message and you should be good to go.
Step 7: Test
circuit
Connect a
220 ohm resistor to pin 5.
Connect an
LED between the resistor and +5V.
It should
blink.
Congratulations.
You're done.
You can also read the article here
: http://www.instructables.com/id/Program-an-ATtiny-with-Arduino/