How to program an Attiny85 or Attiny84

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Prerequisite

  • Arduino IDE must be installed
  • You have a programmer board with FTDI/USB adaptor. FTDI_Programmer

Tiny Core Library

We recommend the tiny core library from this link below. 

http://code.google.com/p/arduino-tiny/

Download it and install it in the sketchbook/hardware folder. Follow instructions in the README file for this.


Connect the hardware

Insert the MCU (Atiny85 or Attiny84) on the programmer board. Beware of the direction when the inserting the MCU. The small dot must be pointed toward the left of the board.

Connect the Programmer board to the FTDI adaptor. Both grounds must be connected together.

Connect the FTDI adaptor to the computer with a USB cable.

Make sure the FTDI adaptor is set to operate on 5V.

Once all connected the Programmer board will show heartbeat with the green led.

Bootloader

If programming the MCU for the first time you must burn the bootloader onto it. For this first select the appropriate board in the Arduino IDE. Tools | Board | ATtiny85 @ 8Mhz. Then select Tools | Burn Bootloarder.


Upload Sketch (ATtiny)

Open your sketch file with the Arduino IDE. Make sure you select the appropriate MCU type in Tools | Board. Upload the sketch from the IDE.

Upload Sketch (ATmega)

It is possible to use this board to upload a sketch to an ATmega chip. For the primary ATmega chip form the board must be removed and replaced with the chip that you wish to program. Open your sketch file with the Arduino IDE. Make sure you select the Arduino UNO type in Tools | Board. Upload the sketch from the IDE.


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