Changed HID report to relative values

Changed from absolute to relative values to avoid the need for jiggling the values. This is needed because equal absolute inputs are ignored in linux. Check the discussion in spacenavd for more informations: FreeSpacenav/spacenavd#108 (comment)
AndunHH · Jul 4, 2024 · c2b9900 · c2b9900
1 parent 7d700db
commit c2b9900
Showing 1 changed file with 5 additions and 4 deletions.
diff --git a/spacemouse-keys/hidInterface.h b/spacemouse-keys/hidInterface.h
@@ -2,8 +2,7 @@
 
 // This portion sets up the communication with the 3DConnexion software. The communication protocol is created here.
 // hidReportDescriptor webpage can be found here: https://eleccelerator.com/tutorial-about-usb-hid-report-descriptors/
-// Altered physical, logical range to ranges the 3DConnexion software expects by Daniel_1284580.
-#define HIDMAXBUTTONS 24 // was 32 by Daniel_1284580, but 24 in the comment... must be multiple of 8!
+#define HIDMAXBUTTONS 24 // must be multiple of 8!
 
 static const uint8_t _hidReportDescriptor[] PROGMEM = {
     0x05, 0x01,          // Usage Page (Generic Desktop)
@@ -20,7 +19,8 @@ static const uint8_t _hidReportDescriptor[] PROGMEM = {
     0x09, 0x32,          // Usage (Z)
     0x75, 0x10,          // Report Size (16)
     0x95, 0x03,          // Report Count (3)
-    0x81, 0x02,          // Input (variable,absolute)
+    //0x81, 0x02,          // Input (variable,absolute) // original Space Mouse Pro (wireless) reports it values as absolute
+    0x81, 0x06,        //     Input (Data,Var,Rel,No Wrap,Linear,Preferred State,No Null Position) // copied from Space Navigator to avoid the need for jiggling
     0xC0,                // End Collection
     0xa1, 0x00,          // Collection (Physical)
     0x85, 0x02,          // Report ID (2)
@@ -33,7 +33,8 @@ static const uint8_t _hidReportDescriptor[] PROGMEM = {
     0x09, 0x35,          // Usage (RZ)
     0x75, 0x10,          // Report Size (16)
     0x95, 0x03,          // Report Count (3)
-    0x81, 0x02,          // Input (variable,absolute)
+    //0x81, 0x02,          // Input (variable,absolute)     // see above
+    0x81, 0x06,        //     Input (Data,Var,Rel,No Wrap,Linear,Preferred State,No Null Position) // see above
     0xC0,                // End Collection
     0xa1, 0x00,          // Collection (Physical)
     0x85, 0x03,          //  Report ID (3)