Heureca! I finally got around to compile my first true Baremetal program for #arm .
From a previous project, I had enough parts and PCB to quickly assemble a SAMD21G15 based test circuit.

I finally fully understood, how linkers work too and how my bootup sequence first has to load the .data segment from flash into sram and zero out the .bss section.

https://codeberg.org/dj-bauer/baremetal-adventures/

#electronics #openocd