Fix MassStorageKeyboard demo USE_INTERNAL_SERIAL check being performed before the...

[pub/lufa.git] / LUFA / Drivers / USB / Class / Host / MIDI.h

diff --git a/LUFA/Drivers/USB/Class/Host/MIDI.h b/LUFA/Drivers/USB/Class/Host/MIDI.h
index 31b7991..2a64dc0 100644 (file)
--- a/LUFA/Drivers/USB/Class/Host/MIDI.h
+++ b/LUFA/Drivers/USB/Class/Host/MIDI.h
@@ -121,6 +121,9 @@
 \r
                        /** Sends a MIDI event packet to the device. If no device is connected, the event packet is discarded.\r
                         *\r
+                        *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the\r
+                        *        call will fail.\r
+                        *\r
                         *  \param[in,out] MIDIInterfaceInfo  Pointer to a structure containing a MIDI Class configuration and state\r
                         *  \param[in] Event  Pointer to a populated USB_MIDI_EventPacket_t structure containing the MIDI event to send\r
                         *\r
@@ -131,6 +134,9 @@
 \r
                        /** Receives a MIDI event packet from the device.\r
                         *\r
+                        *  \note This function must only be called when the Host state machine is in the HOST_STATE_Configured state or the\r
+                        *        call will fail.\r
+                        *\r
                         *  \param[in,out] MIDIInterfaceInfo  Pointer to a structure containing a MIDI Class configuration and state\r
                         *  \param[out] Event  Pointer to a USB_MIDI_EventPacket_t structure where the received MIDI event is to be placed\r
                         *\r