Make Voltage a FEATURE-only report to simplify the report.

Author: forderud

src/HIDPowerDevice.cpp

@@ -63,8 +63,6 @@ static const uint8_t _hidReportDescriptor[] PROGMEM = {
     0x27, 0xFF, 0xFF, 0x00, 0x00, //     LOGICAL_MAXIMUM (65535)
     0x67, 0x21, 0xD1, 0xF0, 0x00, //     UNIT (Centivolts)
     0x55, 0x05, //     UNIT_EXPONENT (5)
-    0x81, 0xA3, //     INPUT (Constant, Variable, Absolute, No Wrap, Linear, No Preferred, No Null Position, Bitfield)
-    0x09, 0x30, //     USAGE (Voltage)
     0xB1, 0xA3, //     FEATURE (Constant, Variable, Absolute, No Wrap, Linear, No Preferred, No Null Position, Volatile, Bitfield)
     0x09, 0x02, //     USAGE (PresentStatus)
     0xA1, 0x02, //     COLLECTION (Logical)

src/HIDPowerDevice.h

@@ -40,7 +40,7 @@
 //================================================================================
 
 #define HID_PD_PRESENTSTATUS         0x07 // INPUT OR FEATURE(required by Windows)
-#define HID_PD_VOLTAGE               0x0B // 11 INPUT (NA) OR FEATURE(implemented)
+#define HID_PD_VOLTAGE               0x0B // 11 FEATURE
 #define HID_PD_REMAININGCAPACITY     0x0C // 12 INPUT OR FEATURE(required by Windows)
 #define HID_PD_FULLCHRGECAPACITY     0x0E // 14 FEATURE ONLY. Last Full Charge Capacity 
 #define HID_PD_CAPACITYMODE          0x16