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Control J-Link programmer-supplied power during upload #878

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Control J-Link programmer-supplied power during upload #878

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20b08c4
Implement pre and post power commands in upload
greyltc Dec 10, 2025
882698f
Fix syntax errors in power command handling
greyltc Dec 11, 2025
417d220
clean up exit from jlink upload script
greyltc Dec 11, 2025
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29 changes: 28 additions & 1 deletion builder/main.py
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Original file line number Diff line number Diff line change
Expand Up @@ -187,8 +187,35 @@ def _jlink_cmd_script(env, source):
"loadbin \"%s\", %s" % (source, board.get(
"upload.offset_address", "0x08000000")),
"r",
"q"
"exit",
]

upload_options = {}
if "BOARD" in env:
upload_options = env.BoardConfig().get("upload", {})

try:
power_target_pre = int(upload_options.get("power_target_pre", None))
pre_pwr_cmds = [
"Power on",
f"Sleep {power_target_pre}",
]
commands = pre_pwr_cmds + commands
except:
pass

try:
depower_target_post = int(upload_options.get("depower_target_post", None))
post_pwr_cmds = [
f"Sleep {depower_target_post}",
"Power off",
"exit",
]
commands.remove("exit")
commands = commands + post_pwr_cmds
except:
pass

with open(script_path, "w") as fp:
fp.write("\n".join(commands))
return script_path
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