gotchas

CMSIS-DAP HID adapters need two udev rules, not just one!!!!!!

https://github.com/signal11/hidapi/blob/425ef9f86e8745ddd5ef5172ef6a607d65cd9726/udev/99-hid.rules

HIDAPI/hidraw

KERNEL=="hidraw*", ATTRS{busnum}=="1", ATTRS{idVendor}=="04d8", ATTRS{idProduct}=="003f", MODE="0666"

---

K20 Reset pin oscillating at ~1.5 ms period (measures around 1.3 v on a meter):

telnet to openocd and issue: kinetis mdm mass_erase