エラーとその対処
J-LINK
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16 | $ JLinkExe -device NRF52 -if SWD -speed 1518 -autoconnect 1
SEGGER J-Link Commander V6.34h (Compiled Oct 9 2018 15:49:05)
DLL version V6.34h, compiled Oct 9 2018 15:48:55
Connecting to J-Link via USB...O.K.
Firmware: J-Link Lite-Cortex-M V8 compiled Sep 15 2016 12:05:01
Hardware version: V8.00
S/N: 518112173
License(s): GDB
VTref=0.000V
Device "NRF52" selected.
Connecting to target via SWD
Cannot connect to target.
J-Link>
|
VTRef=0.000Vなので、ボードに電源が供給されていない。