usbd: Use EP_IN_FLAG from utils for mass storage

Author: turmoni

micropython/usbd/msc.py

@@ -7,6 +7,7 @@
     split_bmRequestType,
     STAGE_SETUP,
     REQ_TYPE_CLASS,
+    EP_IN_FLAG
 )
 from micropython import const
 import micropython
@@ -23,9 +24,6 @@
 _MASS_STORAGE_RESET_REQUEST = const(0xFF)
 _GET_MAX_LUN_REQUEST = const(0xFE)
 
-EP_IN_FLAG = const(1 << 7)
-EP_OUT_FLAG = const(0x7F)
-
 
 class CBW:
     """Command Block Wrapper - handles the incoming data from the host to the device"""
@@ -179,7 +177,7 @@ def get_endpoint_descriptors(self, ep_addr, str_idx):
         self.log(f"MSC: get_endpoint_descriptors, {ep_addr}, {str_idx}")
         # The OUT endpoint is from host to device, and has the top bit set to 0
         # The IN endpoint is from device to host, and has the top bit set to 1
-        self.ep_out = ep_addr & EP_OUT_FLAG
+        self.ep_out = ep_addr & ~EP_IN_FLAG
         self.ep_in = (ep_addr + 1) | EP_IN_FLAG
         e_out = endpoint_descriptor(self.ep_out, "bulk", _MAX_PACKET_SIZE)
         e_in = endpoint_descriptor(self.ep_in, "bulk", _MAX_PACKET_SIZE)