Most of Seeed & Adafruit boards Seeeduino M0/M4, featuring M0, M4 and nRF52840 are able to run the daplink sketch. It allows us to flash/burn bootloader of any ARM Cortex-M MCU (M0, M4, nRF52832, nRF52840 etc ..) and step debugging with gdb and/or supported IDE such as eclipse, Keil, IAR. For your convenience, a precompiled daplink firmware in uf2 format for specific board can be found at wiki page
Contributing to this software is warmly welcomed. You can do this basically by
forking, committing modifications and then pulling requests (follow the links above
for operating guide). Adding change log and your contact into file header is encouraged.
Thanks for your contribution.