usb mouse: Use bytes literal for report descriptor.

(More RAM and bytecode efficient.)

Signed-off-by: Angus Gratton <angus@redyak.com.au>

Author: projectgus

micropython/usb/usb-device-mouse/usb/device/mouse.py

@@ -61,58 +61,34 @@ def move_by(self, dx, dy):
 
 
 # Basic 3-button mouse HID Report Descriptor.
-# This is cribbed from Appendix E.10 of the HID v1.11 document.
-_MOUSE_REPORT_DESC = bytes(
-    [
-        0x05,
-        0x01,  # Usage Page (Generic Desktop)
-        0x09,
-        0x02,  # Usage (Mouse)
-        0xA1,
-        0x01,  # Collection (Application)
-        0x09,
-        0x01,  # Usage (Pointer)
-        0xA1,
-        0x00,  # Collection (Physical)
-        0x05,
-        0x09,  # Usage Page (Buttons)
-        0x19,
-        0x01,  # Usage Minimum (01),
-        0x29,
-        0x03,  # Usage Maximun (03),
-        0x15,
-        0x00,  # Logical Minimum (0),
-        0x25,
-        0x01,  # Logical Maximum (1),
-        0x95,
-        0x03,  # Report Count (3),
-        0x75,
-        0x01,  # Report Size (1),
-        0x81,
-        0x02,  # Input (Data, Variable, Absolute), ;3 button bits
-        0x95,
-        0x01,  # Report Count (1),
-        0x75,
-        0x05,  # Report Size (5),
-        0x81,
-        0x01,  # Input (Constant), ;5 bit padding
-        0x05,
-        0x01,  # Usage Page (Generic Desktop),
-        0x09,
-        0x30,  # Usage (X),
-        0x09,
-        0x31,  # Usage (Y),
-        0x15,
-        0x81,  # Logical Minimum (-127),
-        0x25,
-        0x7F,  # Logical Maximum (127),
-        0x75,
-        0x08,  # Report Size (8),
-        0x95,
-        0x02,  # Report Count (2),
-        0x81,
-        0x06,  # Input (Data, Variable, Relative), ;2 position bytes (X & Y)
-        0xC0,  # End Collection,
-        0xC0,  # End Collection
-    ]
+# This is based on Appendix E.10 of the HID v1.11 document.
+# fmt: off
+_MOUSE_REPORT_DESC = (
+    b'\x05\x01'  # Usage Page (Generic Desktop)
+        b'\x09\x02'  # Usage (Mouse)
+    b'\xA1\x01'  # Collection (Application)
+        b'\x09\x01'  # Usage (Pointer)
+        b'\xA1\x00'  # Collection (Physical)
+            b'\x05\x09'  # Usage Page (Buttons)
+                b'\x19\x01'  # Usage Minimum (01),
+                b'\x29\x03'  # Usage Maximun (03),
+                b'\x15\x00'  # Logical Minimum (0),
+                b'\x25\x01'  # Logical Maximum (1),
+                b'\x95\x03'  # Report Count (3),
+                b'\x75\x01'  # Report Size (1),
+                b'\x81\x02'  # Input (Data, Variable, Absolute), ;3 button bits
+                b'\x95\x01'  # Report Count (1),
+                b'\x75\x05'  # Report Size (5),
+                b'\x81\x01'  # Input (Constant), ;5 bit padding
+            b'\x05\x01'  # Usage Page (Generic Desktop),
+                b'\x09\x30'  # Usage (X),
+                b'\x09\x31'  # Usage (Y),
+                b'\x15\x81'  # Logical Minimum (-127),
+                b'\x25\x7F'  # Logical Maximum (127),
+                b'\x75\x08'  # Report Size (8),
+                b'\x95\x02'  # Report Count (2),
+                b'\x81\x06'  # Input (Data, Variable, Relative), ;2 position bytes (X & Y)
+        b'\xC0'  # End Collection
+    b'\xC0'  # End Collection
 )
+# fmt: on