I try to run a Atmel SAM D20 MCU at 48MHz using the internal oscillator (OCM8M) and the digital frequency locked loop (DFLL48M). All I achieve is a deadlock of the processor, even I use a simple "Atmel Start" project.
I searched hard, but I found no examples or even descriptions how to achieve this. Everything references to some other source, but no source explains the process in detail.
Which is the correct way to put the CPU into internal 48MHz mode?
Are there any detailed examples or explanations somewhere? Did I miss an important source?
Any help is welcome. Any code examples are welcome in any language.