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probe: jlink: open emulator before issuing commands #1927

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probe: jlink: open emulator before issuing commands #1927

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14 changes: 13 additions & 1 deletion pyocd/probe/jlink_probe.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@
# Copyright (c) 2020,2025 Arm Limited
# Copyright (c) 2021-2022 Chris Reed
# Copyright (c) 2023 Marian Muller Rebeyrol
# Copyright (c) 2026 Christophe Dufaza
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
Expand Down Expand Up @@ -187,12 +188,23 @@ def open(self):
try:
# Configure UI usage. We must do this here rather than in the ctor because the ctor
# doesn't have access to the session.
if self.session.options.get('jlink.non_interactive'):
non_interactive = self.session.options.get('jlink.non_interactive')

# With JLink DLL versions 9.14 and above, calling disable_dialog_boxes()
# before open() puts the pylink adapter into an inconsistent state.
# See:
# - #1925 "Jlink V9.22 No emulator with serial number"
# - #1927 "probe: jlink: open emulator before issuing commands"
# - square/pylink#259 "Fix exec command"
if non_interactive and self._link.version < "9.14":
self._link.disable_dialog_boxes()

self._link.open(self._serial_number_int)
self._is_open = True

if non_interactive and self._link.version >= "9.14":
self._link.disable_dialog_boxes()

# Get available wire protocols.
ifaces = self._link.supported_tifs()
self._supported_protocols = [DebugProbe.Protocol.DEFAULT]
Expand Down