hat switch experiments

Author: BinaryMan32

examples/phoenix-arduino-joystick/phoenix-arduino-joystick.ino

@@ -51,6 +51,25 @@ static const u8 sHidDescriptorData[] PROGMEM = {
     Global::ReportCount | 1, 24,
     Main::Input | 1, DataBits::Variable,
 
+#if 0
+    /*
+     * 8 way hat switch
+     * Reports an angle in 45 degree increments by mapping the values 0-7
+     * to the angles 0-315 degrees. Report -8 (the most negative value) if
+     * the hat is in the null position.
+     */
+    Global::UsagePage | 1, usage::Page::GenericDesktop,
+    Local::Usage | 1, usage::generic_desktop::Miscellaneous::HatSwitch,
+    Global::LogicalMinimum | 1, 0,
+    Global::LogicalMaximum | 1, 7,
+    Global::PhysicalMinimum | 1, 0,
+    Global::PhysicalMaximum | 2, 0x3b, 0x01, // 0x13b = 315
+    Global::Unit | 1, 0x14, // Degrees | EnglishRotation
+    Global::ReportSize | 1, 4,
+    Global::ReportCount | 1, 1,
+    Main::Input | 1, DataBits::Variable | DataBits::NullState,
+#endif
+
   Main::EndCollection | 0,
 };
 

src/HidDescriptorHelper.h

@@ -27,7 +27,7 @@ enum class Global : u8
   UsagePage       = 0x0, // See usage::Page for values
   LogicalMinimum  = 0x1,
   LogicalMaximum  = 0x2,
-  PhysicalMinumum = 0x3,
+  PhysicalMinimum = 0x3,
   PhysicalMaximum = 0x4,
   UnitExponent    = 0x5,
   Unit            = 0x6,
@@ -115,9 +115,14 @@ constexpr u8 operator | (Local tag, int size)
 // Bits used in constructing values of Main::Input, Main::Output, and Main::Feature
 enum DataBits
 {
-  Constant = 0x01, // Data if not set
-  Variable = 0x02, // Array if not set
-  Relative = 0x04, // Absolute if not set
+  Constant    = 0x01, // Data if not set
+  Variable    = 0x02, // Array if not set
+  Relative    = 0x04, // Absolute if not set
+  Wrap        = 0x08, // NoWrap if not set
+  NonLinear   = 0x10, // Linear if not set
+  NoPreferred = 0x20, // Has Preferred state if not set
+  NullState   = 0x40, // NoNullPosition if not set
+  Volatile    = 0x80, // NonVolatile if not set
 };
 
 // Values of Main::Collection