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RTT_COMMAND: Allow no down-channels #1680

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RTT_COMMAND: Allow no down-channels #1680

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18 changes: 12 additions & 6 deletions pyocd/subcommands/rtt_cmd.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@
# Copyright (C) 2022 Johan Carlsson <[email protected]>
# Copyright (C) 2022 Samuel Dewan
# Copyright (C) 2022 Zhengji Li
# Copyright (C) 2024 Laurens Miers
# SPDX-License-Identifier: Apache-2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
Expand Down Expand Up @@ -117,12 +118,13 @@ def invoke(self) -> int:
kb = KBHit()

if self._args.log_file is None:
if len(control_block.down_channels) < 1:
LOG.error("No down channels.")
return 1
down_chan: RTTDownChannel = control_block.down_channels[self._args.down_channel_id]
down_name = down_chan.name if down_chan.name is not None else ""
LOG.info(f"Writing to down channel {self._args.down_channel_id} (\"{down_name}\")")
if control_block.down_channels:
down_chan: RTTDownChannel = control_block.down_channels[self._args.down_channel_id]
down_name = down_chan.name if down_chan.name is not None else ""
LOG.info(f"Writing to down channel {self._args.down_channel_id} (\"{down_name}\")")
else:
down_chan = None
LOG.info("No down channel, input will be ignored")

self.viewer_loop(up_chan, down_chan, kb)
else:
Expand Down Expand Up @@ -199,6 +201,10 @@ def viewer_loop(self, up_chan, down_chan, kb):
if not cmd:
continue

# If no channel, ignore command
if not down_chan:
continue

# write cmd buffer to down buffer 0 (host -> target)
bytes_out = down_chan.write(cmd)
cmd = cmd[bytes_out:]