Atmel-ICE, PIO

Terminal output:

Configuring upload protocol...
AVAILABLE: atmel-ice, blackmagic, jlink, sam-ba
CURRENT: upload_protocol = atmel-ice
Uploading .pio\build\adafruit_trinket_m0\firmware.bin
xPack OpenOCD, 64-bit Open On-Chip Debugger 0.10.0+dev (2019-07-17-11:28)
Licensed under GNU GPL v2
For bug reports, read
        http://openocd.org/doc/doxygen/bugs.html
debug_level: 1

at91samd21e18
in procedure 'program'
** OpenOCD init failed **
shutdown command invoked

*** [upload] Error 1





platform.ini:

[env:adafruit_trinket_m0]
platform = atmelsam
board = adafruit_trinket_m0
; debug_tool = blackmagic
debug_tool = atmel-ice
upload_protocol = atmel-ice
framework = arduino
lib_extra_dirs = ~/Documents/Arduino/libraries