diff --git a/scripts/dump_spi_flash.py b/scripts/dump_spi_flash.py
index b92fd62..4eb24dc 100644
--- a/scripts/dump_spi_flash.py
+++ b/scripts/dump_spi_flash.py
@@ -6,8 +6,9 @@ from contextlib import suppress
 
 import hid
 
-from joycontrol import logging_default as log
+from joycontrol import logging_default as log, utils
 from joycontrol.report import OutputReport, InputReport, SubCommand
+from joycontrol.utils import AsyncHID
 
 logger = logging.getLogger(__name__)
 
@@ -17,23 +18,6 @@ PRODUCT_ID_JR = 8199
 PRODUCT_ID_PC = 8201
 
 
-class AsyncHID(hid.Device):
-    def __init__(self, *args, loop=asyncio.get_event_loop(), **kwargs):
-        super().__init__(*args, **kwargs)
-        self._loop = loop
-
-        self._write_lock = asyncio.Lock()
-        self._read_lock = asyncio.Lock()
-
-    async def read(self, size, timeout=None):
-        async with self._read_lock:
-            return await self._loop.run_in_executor(None, hid.Device.read, self, size, timeout)
-
-    async def write(self, data):
-        async with self._write_lock:
-            return await self._loop.run_in_executor(None, hid.Device.write, self, data)
-
-
 class DataReader:
     def __init__(self):
         self.pending_request = None
@@ -160,13 +144,9 @@ async def _main(args, loop):
 
     logger.info(f'Found controller "{controller}".')
 
-    if args.output:
-        with open(args.output, 'wb') as output:
-            with AsyncHID(path=controller['path'], loop=loop) as hid_controller:
-                await dump_spi_flash(hid_controller, output_file=output)
-    else:
+    with utils.get_output(path=args.output, open_flags='wb', default=None) as output:
         with AsyncHID(path=controller['path'], loop=loop) as hid_controller:
-            await dump_spi_flash(hid_controller)
+            await dump_spi_flash(hid_controller, output_file=output)
 
 
 if __name__ == '__main__':
@@ -193,5 +173,3 @@ if __name__ == '__main__':
     finally:
         loop.stop()
         loop.close()
-
-