I have been using Atmel debuggers for professional development for many years. Atmel ICE, the latest in its family, can work with both ATMega devices and newer Atmel ARM devices like the SamC21. It also does touch debugging for C21, eliminating the need for that QT100 board. Combined with Atmel Studio, this is a powerful development tool. And it costs hundreds less than other ARM debuggers. Whether you are a professional or an amateur, this is a great tool for your workplace.
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