Fix attaching debugger while paused

SConstruct

@@ -433,7 +433,13 @@ distenv.PhonyTarget(
 # Find blackmagic probe
 distenv.PhonyTarget(
     "get_blackmagic",
-    "@echo $( ${BLACKMAGIC_ADDR} $)",
+    [
+        [
+            "${PYTHON3}",
+            "${FBT_SCRIPT_DIR}/enable_debug.py",
+        ],
+        "@echo $( ${BLACKMAGIC_ADDR} $)",
+    ],
 )
 
 

scripts/enable_debug.py

@@ -0,0 +1,36 @@
+import serial.tools.list_ports as list_ports
+import serial
+
+
+def main():
+    try:
+        flippers = list(list_ports.grep("flip_"))
+        if len(flippers) != 1:
+            return
+
+        port = serial.Serial()
+        port.port = flippers[0].device
+        port.timeout = 0.1
+        port.write_timeout = 0.1
+        port.baudrate = 115200  # Doesn't matter for VCP
+        port.open()
+    except Exception:
+        return
+
+    try:
+        port.write(
+            b"sysctl debug 1\r"
+            b"sysctl sleep_mode legacy\r"
+            b"sysctl log_level debug\r"
+        )
+    except Exception:
+        pass
+    finally:
+        try:
+            port.close()
+        except Exception:
+            pass
+
+
+if __name__ == "__main__":
+    main()

scripts/fbt_tools/blackmagic.py

@@ -1,6 +1,4 @@
 from SCons.Errors import StopError
-from flipper.storage import FlipperStorage
-import serial.tools.list_ports as list_ports
 
 
 class BlackmagicResolver:
@@ -32,18 +30,6 @@ class BlackmagicResolver:
             # print("\n".join([f"{p.device} {vars(p)}" for p in ports]))
             return sorted(ports, key=lambda p: f"{p.location}_{p.name}")[0]
 
-    def _enable_flipper_debug(self):
-        flippers = list(list_ports.grep("flip_"))
-        if len(flippers) != 1:
-            return
-        with FlipperStorage(flippers[0].device) as storage:
-            storage.send_and_wait_eol("sysctl debug 1\r")
-            storage.read.until(storage.CLI_EOL)
-            storage.send_and_wait_eol("sysctl sleep_mode legacy\r")
-            storage.read.until(storage.CLI_EOL)
-            storage.send_and_wait_eol("sysctl log_level debug\r")
-            storage.read.until(storage.CLI_EOL)
-
     # Look up blackmagic probe hostname with dns
     def _resolve_hostname(self):
         import socket
@@ -57,7 +43,6 @@ class BlackmagicResolver:
     def get_serial(self):
         if not (probe := self._find_probe()):
             return None
-        self._enable_flipper_debug()
         # print(f"Found Blackmagic probe on {probe.device}")
         if self.env.subst("$PLATFORM") == "win32":
             return f"\\\\.\\{probe.device}"