feat: add DOA3 script for USB device direction tracking and update tuning response handling for Python 3

DOA3.py

@@ -0,0 +1,29 @@
+from tuning import Tuning
+import usb.core
+import usb.util
+import time
+
+# Find the USB device by Vendor ID (VID) and Product ID (PID)
+dev = usb.core.find(idVendor=0x2886, idProduct=0x0018)
+
+if dev:
+    # Initialize the Tuning object
+    mic_tuning = Tuning(dev)
+
+    # Print the initial direction
+    print(f"Initial Direction: {mic_tuning.direction}")
+
+    # Main loop to continuously print the direction
+    while True:
+        try:
+            # Python 3 print function syntax
+            print(f"Current Direction: {mic_tuning.direction}")
+            time.sleep(1)
+
+        # Updated exception handling (Python 3 requires 'as e' for accessing the exception object)
+        except KeyboardInterrupt:
+            print("\nExiting loop...")
+            break
+
+else:
+    print("Error: USB device (VID=0x2886, PID=0x0018) not found.")

tuning.py

@@ -106,7 +106,9 @@ def read(self, name):
             usb.util.CTRL_IN | usb.util.CTRL_TYPE_VENDOR | usb.util.CTRL_RECIPIENT_DEVICE,
             0, cmd, id, length, self.TIMEOUT)
 
-        response = struct.unpack(b'ii', response.tostring())
+        # response = struct.unpack(b'ii', response.tostring())
+        # New Python 3 code
+        response = struct.unpack(b'ii', response.tobytes())
 
         if data[2] == 'int':
             result = response[0]