In this quick tutorial we will see how to program our arduino board with the help of an external programmer and not by using the arduino bootloader.
Before proceeding with this tutorial take a look at the "burn arduino with usb tiny" tutorial.
The first thing you have to understand is that by uploading a program with an external programmer you are going to lose your already burned bootloader on your ATMEGA chip.
So before proceeding make sure you can bootload your chips using your external programmer.
The beauty of micro controllers is that some operations can be achieved in more than a single way.
When you buy them you generally get them free of any software or - better - firmware, totally virgin and ready only to be inserted onto your board.
Sometimes they are bootloaded, that's necessary to communicate with some other specific hardware: ATMega is a good example.
Thanks to Arduino board's popularity is easy to find ATMega microcontrollers directly set to work with it. ...continue reading "Burn Arduino bootloader into ATMega (USBtinyISP)"