mkiiskila commented on issue #1515: bbc microbit tutorial or example? URL: https://github.com/apache/mynewt-core/issues/1515#issuecomment-437853204 If I recall correctly, BBC microbit did not have a simple LED to drive with a single GPIO, so maybe it's still just working? I don't have microbit at hand, but according to schematics the serial console is going to JTAG chip, so that should show up as a serial device. And you should be able to verify that it comes up ok with your favorite terminal program. Blinky does not enable console, but slinky does. Openocd erases the underlying flash when loading. If the flashing does not 'stick', it does not complain. So if you're uncertain whether flash is write protected or not, you should make sure that what you wrote is what's now in the flash. I can't recall what was going on with RedBear Nano2 to require eraseall cycle. Maybe they had locked out JTAG access?
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