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by jordz 3385 days ago
We use NXP/Kinetis chips (Cortex M0+) and have been relatively happy with them from a cost and hassle point of view. When developing we use SWD with a kinetis dev board as the programmer hooked up to the target MCU. We have had strange issues with the MSB bricking things when updating the bootloaders but thankfully they're cheap enough to replace.