I want to try bare metal programming the core. But I am unsure what I need to keep the USB bootloader alife.
If I would create an empty project, dropping out all the Spark’s firmware. Maybe even write nonsense to the flash. Would the USB flash loader be alife and I can reprogram without a JTAG programmer? Or is there a chance of bricking the core.
Maybe anyone has some minimal project which only does some hardware initialization and may blink the LED or something.
What would be in the core if I would program such an empty firmware. Init code or maybe even a network driver? The bootloader?