* Fix maixcam can not release resource

Author: lxowalle

maix/__signal_handle__.py

@@ -1,23 +1,29 @@
 import signal, sys, threading
 from . import _maix
 
-force_exit_timeout = 2
+# force_exit_timeout = 2
 
-def force_exit():
-    print("Force exit now")
-    sys.exit(1)
+# def force_exit():
+#     print("Force exit now")
+#     sys.exit(1)
 
 def signal_handle(signum, frame):
     _maix.app.set_exit_flag(True)
     signal.signal(signal.SIGINT, signal.SIG_DFL)
     signal.signal(signal.SIGILL, signal.SIG_DFL)
     signal.signal(signal.SIGABRT, signal.SIG_DFL)
-    # set exit flag and wait force_exit_timeout seconds, then force exit
-    t = threading.Timer(force_exit_timeout, force_exit)
-    t.daemon = True
-    t.start()
-    _maix.util.do_exit_function()
 
+    device_name = _maix.sys.device_name().lower()
+    if device_name == 'maixcam' or device_name == 'maixcam-pro': # MaixCAM must exit at here, otherwise it can not release hardware resources
+        _maix.util.do_exit_function()
+        sys.exit(0)
+    else:
+        _maix.util.do_exit_function()
+        sys.exit(0)
+        # # set exit flag and wait force_exit_timeout seconds, then force exit
+        # t = threading.Timer(force_exit_timeout, force_exit)
+        # t.daemon = True
+        # t.start()
 def register_signal_handle():
     signal.signal(signal.SIGINT, signal_handle)
     signal.signal(signal.SIGILL, signal_handle)