Reading fuses to determine bootloader start

[jackhumbert]

This information doesn't really need to be an option in QMK - it's configurable via the fuses, and if we read from that, we'd be doing the same thing that the actual reset button does (it's stored in the HIGH byte):

#include <avr/boot.h>;

uint8_t high = boot_lock_fuse_bits_get(GET_HIGH_FUSE_BITS);
if (high & 0b110)
// 256
else if (high & 0b010)
// 512
else if (high & 0b100)
// 1024
else
// 2048

[drashna]

I think that you fixed this already? https://github.com/qmk/qmk_firmware/blob/7c9d5ace143d3cc6d767a354acde814926d566fd/tmk_core/common/avr/bootloader.c#L81-L93

[drashna]

@jackhumbert Okay if I close this?

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