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dap: add user friendly "Target not detected" message in discovery #2045

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Merged
RobertRostohar merged 1 commit into from
Oct 8, 2026
+17 −12
Merged

dap: add user friendly "Target not detected" message in discovery #2045

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29 changes: 17 additions & 12 deletions pyocd/coresight/dap.py
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Original file line number Diff line number Diff line change
Expand Up @@ -461,18 +461,23 @@ def disable_debug_port_hook(self) -> Optional[bool]:
return cst.call_pre_discovery_debug_sequence('DebugPortStop')

def _connect(self) -> None:
# Connect the probe.
probe_conn = ProbeConnector(self.probe)
probe_conn.connect(self._protocol)

# Attempt to connect DP.
connector = DPConnector(self.probe)
if not self.connect_debug_port_hook():
connector.connect()
self.dpidr = connector.idr
else:
# We still need to read the IDR for our own use.
self.dpidr = connector.read_idr()
try:
# Connect the probe.
probe_conn = ProbeConnector(self.probe)
probe_conn.connect(self._protocol)

# Attempt to connect DP.
connector = DPConnector(self.probe)
if not self.connect_debug_port_hook():
connector.connect()
self.dpidr = connector.idr
else:
# We still need to read the IDR for our own use.
self.dpidr = connector.read_idr()
except exceptions.Error as err:
LOG.error("%s", err)
raise exceptions.Error(
"Target not detected. Check connection to target. Potentially reduce debug clock.") from err
assert self.dpidr

# Report on DP version.
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