0x09, 0x02,           /*   Usage (Vendor Defined)                        */\r
        0x75, 0x08,           /*   Report Size (8)                               */\r
        0x95, GENERIC_REPORT_SIZE, /*   Report Count (GENERIC_REPORT_SIZE)       */\r
-       0x15, 0x00,           /*   Logical Minimum (0)                           */\r
-       0x25, 0xff,           /*   Logical Maximum (255)                         */\r
+       0x15, 0x80,           /*   Logical Minimum (-128)                        */\r
+       0x25, 0x7F,           /*   Logical Maximum (127)                         */\r
        0x81, 0x02,           /*   Input (Data, Variable, Absolute)              */\r
        0x09, 0x03,           /*   Usage (Vendor Defined)                        */\r
        0x75, 0x08,           /*   Report Size (8)                               */\r