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

[pub/lufa.git] / LUFA / Drivers / USB / Class / Device / Audio.h

diff --git a/LUFA/Drivers/USB/Class/Device/Audio.h b/LUFA/Drivers/USB/Class/Device/Audio.h
index fcfd65d..e516b71 100644 (file)
--- a/LUFA/Drivers/USB/Class/Device/Audio.h
+++ b/LUFA/Drivers/USB/Class/Device/Audio.h
@@ -123,6 +123,9 @@
                        /** Determines if the given audio interface is ready for a sample to be read from it, and selects the streaming\r
                         *  OUT endpoint ready for reading.\r
                         *\r
+                        *  \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or\r
+                        *        the call will fail.\r
+                        *\r
                         *  \param[in,out] AudioInterfaceInfo  Pointer to a structure containing an Audio Class configuration and state\r
                         *\r
                         *  \return Boolean true if the given Audio interface has a sample to be read, false otherwise\r
@@ -132,6 +135,9 @@
                        /** Determines if the given audio interface is ready to accept the next sample to be written to it, and selects\r
                         *  the streaming IN endpoint ready for writing.\r
                         *\r
+                        *  \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or\r
+                        *        the call will fail.\r
+                        *\r
                         *  \param[in,out] AudioInterfaceInfo  Pointer to a structure containing an Audio Class configuration and state\r
                         *\r
                         *  \return Boolean true if the given Audio interface is ready to accept the next sample, false otherwise\r