#Atmel dragon programmer how to#

This is used to cause a reset to be triggered when communication is initiated via the USB. If you check the Arduino Schematic, you will see that there IS a 100nF capacitor connected to RESET. All external reset sources must be disconnected.Capacitors connected to the RESET pin must be disconnected when using debugWire.I also recommend you get the ATMega328 data sheet. an AVR Dragon (a fairly cheap USB programmer/on-chip-debugger) and a 6-way cable to connect it.Atmel Studio 6 (Windows only but you could try using it from inside VirtualBox if you are a linux or Mac user – I’ve had a good experience of VirtualBox on Ubuntu, although I’ve not tried Atmel Studio ).as for the simulator, but for the real hardware. Inspect memory, single-step through code, set break-points (at which execution will stop), inspect registers and input/output port values etc.

#Atmel dragon programmer how to#

The previous post describes how to get started with using the Atmel Studio simulator, which is a good introduction to the activities required during on-chip debugging (OCD) without needing to fiddle quite so much and without wondering whether the hardware is playing nicely.

This really notes for myself for next time, when I’m bound to have forgotten the recipe, but I hope someone else will find it useful. There are quite a few brief comments on the forums and people asking how to do it but nothing really good, with the possible exception of a post by Steve Cogswell which refers to an old version of Arduino and an old version of Atmel Studio. This post is motivated by the lack of information about using debugWire with an Arduino (or similar) on the web.