Add branch for the conversion of demos to use standard C header files for configurati...

[pub/USBasp.git] / LUFA / Drivers / USB / Class / Common / MIDIClassCommon.h

diff --git a/LUFA/Drivers/USB/Class/Common/MIDIClassCommon.h b/LUFA/Drivers/USB/Class/Common/MIDIClassCommon.h
index 60b0908..25b80b7 100644 (file)
--- a/LUFA/Drivers/USB/Class/Common/MIDIClassCommon.h
+++ b/LUFA/Drivers/USB/Class/Common/MIDIClassCommon.h
@@ -84,8 +84,20 @@
                 *  addresses are zero-indexed. This converts a natural MIDI channel number into the logical channel address.
                 *
                 *  \param[in] channel  MIDI channel number to address.
+                *
+                *  \return Constructed MIDI channel ID.
                 */
                #define MIDI_CHANNEL(channel)        ((channel) - 1)
+               
+               /** Constructs a MIDI event ID from a given MIDI command and a virtual MIDI cable index. This can then be
+                *  used to create and decode \ref MIDI_EventPacket_t MIDI event packets.
+                *
+                *  \param[in] virtualcable  Index of the virtual MIDI cable the event relates to
+                *  \param[in] command       MIDI command to send through the virtual MIDI cable
+                *
+                *  \return Constructed MIDI event ID.
+                */
+               #define MIDI_EVENT(virtualcable, command) ((virtualcable << 4) | (command >> 4))
 
        /* Enums: */
                /** Enum for the possible MIDI jack types in a MIDI device jack descriptor. */
@@ -290,8 +302,7 @@
                 */
                typedef struct
                {
-                       unsigned Command     : 4; /**< Upper nibble of the MIDI command being sent or received in the event packet. */
-                       unsigned CableNumber : 4; /**< Virtual cable number of the event being sent or received in the given MIDI interface. */
+                       uint8_t Event; /**< MIDI event type, constructed with the \ref MIDI_EVENT() macro. */
 
                        uint8_t  Data1; /**< First byte of data in the MIDI event. */
                        uint8_t  Data2; /**< Second byte of data in the MIDI event. */