Oops - forgot to add in LOGICAL MINIMUM and LOGICAL MAXIMUM report items into the standard library Joystick HID report descriptor macro. Add in support for joystick resolution reporting via PHYSICAL_MINIMUM and PHYSICAL_MAXIMUM items.

Demos/Device/ClassDriver/GenericHID/Descriptors.c

@@ -45,7 +45,7 @@
  */
 USB_Descriptor_HIDReport_Datatype_t PROGMEM GenericReport[] =
 {
-	/* Use the HID class driver's standard Joystick report.
+	/* Use the HID class driver's standard Vendor HID report.
 	 *  Vendor Usage Page: 1
 	 *  Vendor Collection Usage: 1
 	 *  Vendor Report IN Usage: 2

Demos/Device/ClassDriver/Joystick/Descriptors.c

@@ -48,9 +48,11 @@ USB_Descriptor_HIDReport_Datatype_t PROGMEM JoystickReport[] =
 	/* Use the HID class driver's standard Joystick report.
 	 *   Min X/Y Axis values: -100
 	 *   Max X/Y Axis values:  100
+	 *   Min physical X/Y Axis values (used to determine resolution): -1
+	 *   Max physical X/Y Axis values (used to determine resolution):  1
 	 *   Buttons: 2
 	 */
-	HID_DESCRIPTOR_JOYSTICK(-100, 100, 2)
+	HID_DESCRIPTOR_JOYSTICK(-100, 100, -1, 1, 2)
 };
 
 /** Device descriptor structure. This descriptor, located in FLASH memory, describes the overall

Demos/Device/LowLevel/Joystick/Descriptors.c

@@ -54,8 +54,10 @@ USB_Descriptor_HIDReport_Datatype_t PROGMEM JoystickReport[] =
 	        HID_RI_USAGE(8, 0x31), /* Usage Y */
 	        HID_RI_LOGICAL_MINIMUM(8, -100),
 	        HID_RI_LOGICAL_MAXIMUM(8, 100),
-	        HID_RI_REPORT_SIZE(8, 0x08),
+	        HID_RI_PHYSICAL_MINIMUM(8, -1),
+	        HID_RI_PHYSICAL_MAXIMUM(8, 1),
 	        HID_RI_REPORT_COUNT(8, 0x02),
+	        HID_RI_REPORT_SIZE(8, 0x08),
 	        HID_RI_INPUT(8, HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_ABSOLUTE),
 	    HID_RI_END_COLLECTION(0),
 	    HID_RI_USAGE_PAGE(8, 0x09), /* Button */

LUFA/Drivers/USB/Class/Common/HID.h

@@ -343,11 +343,13 @@
 		 *  Where \c uintA_t is a type large enough to hold one bit per button, and \c intB_t is a type large enough to hold the
 		 *  ranges of the signed \c MinAxisVal and \c MaxAxisVal values.
 		 *
-		 *  \param[in] MinAxisVal  Minimum X/Y logical axis value
-		 *  \param[in] MaxAxisVal  Maximum X/Y logical axis value
-		 *  \param[in] Buttons     Total number of buttons in the device
+		 *  \param[in] MinAxisVal      Minimum X/Y logical axis value
+		 *  \param[in] MaxAxisVal      Maximum X/Y logical axis value
+		 *  \param[in] MinPhysicalVal  Minimum X/Y physical axis value, for movement resolution calculations
+		 *  \param[in] MaxPhysicalVal  Maximum X/Y physical axis value, for movement resolution calculations
+		 *  \param[in] Buttons         Total number of buttons in the device
 		 */
-		#define HID_DESCRIPTOR_JOYSTICK(MinAxisVal, MaxAxisVal, Buttons) \
+		#define HID_DESCRIPTOR_JOYSTICK(MinAxisVal, MaxAxisVal, MinPhysicalVal, MaxPhysicalVal, Buttons) \
 			HID_RI_USAGE_PAGE(8, 0x01),                     \
 			HID_RI_USAGE(8, 0x04),                          \
 			HID_RI_COLLECTION(8, 0x01),                     \
@@ -355,8 +357,12 @@
 				HID_RI_COLLECTION(8, 0x00),                 \
 					HID_RI_USAGE(8, 0x30),                  \
 					HID_RI_USAGE(8, 0x31),                  \
-					HID_RI_REPORT_SIZE(8, (((((uint16_t)MinAxisVal > 0xFF) && ((uint16_t)MaxAxisVal < 0xFF)) ? 8 : 16))), \
+					HID_RI_LOGICAL_MINIMUM(16, MinAxisVal), \
+					HID_RI_LOGICAL_MAXIMUM(16, MaxAxisVal), \
+					HID_RI_PHYSICAL_MINIMUM(16, MinPhysicalVal), \
+					HID_RI_PHYSICAL_MAXIMUM(16, MaxPhysicalVal), \
 					HID_RI_REPORT_COUNT(8, 0x02),           \
+					HID_RI_REPORT_SIZE(8, (((((uint16_t)MinAxisVal > 0xFF) && ((uint16_t)MaxAxisVal < 0xFF)) ? 8 : 16))), \
 					HID_RI_INPUT(8, HID_IOF_DATA | HID_IOF_VARIABLE | HID_IOF_ABSOLUTE), \
 				HID_RI_END_COLLECTION(0),                   \
 				HID_RI_USAGE_PAGE(8, 0x09),                 \

Projects/TempDataLogger/Descriptors.c

@@ -57,7 +57,7 @@
  */
 USB_Descriptor_HIDReport_Datatype_t PROGMEM GenericReport[] =
 {
-	/* Use the HID class driver's standard Joystick report.
+	/* Use the HID class driver's standard Vendor HID report.
 	 *  Vendor Usage Page: 1
 	 *  Vendor Collection Usage: 1
 	 *  Vendor Report IN Usage: 2