I have realized that there might be some kind of mystery fog around the Atmel ARM Cortex related product line to me. That said, it is very unclear which tools and toolchain can be employed to start developing programs. There is a lot of information out there but I'd prefer this forum due to the fact that everyone here are mostly dealing with the Atmel products. As for myself, I am quite familiar with AVR Devices and can work with them pretty well. But what would be the advice to the newcomer into the world of ARM products of the Atmel. I mean to start efficient and learning in a constructive pace. Is there anything similar like for the AVR toolchain=?, or maybe like <avr/io.h> file where all sorts of stuff is already defined?=. Any information here will be highly appreciated.