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

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

diff --git a/LUFA/Drivers/USB/Class/Device/CDC.h b/LUFA/Drivers/USB/Class/Device/CDC.h
index fb64d9e..30d3526 100644 (file)
--- a/LUFA/Drivers/USB/Class/Device/CDC.h
+++ b/LUFA/Drivers/USB/Class/Device/CDC.h
@@ -157,6 +157,9 @@
                        /** Sends a given string to the attached USB host, if connected. If a host is not connected when the function is called, the\r
                         *  string is discarded.\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] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state\r
                         *  \param[in] Data  Pointer to the string to send to the host\r
                         *  \param[in] Length  Size in bytes of the string to send to the host\r
@@ -169,6 +172,9 @@
                        /** Sends a given byte to the attached USB host, if connected. If a host is not connected when the function is called, the\r
                         *  byte is discarded.\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] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state\r
                         *  \param[in] Data  Byte of data to send to the host\r
                         *\r
@@ -178,6 +184,9 @@
                        \r
                        /** Determines the number of bytes received by the CDC interface from the host, waiting to be read.\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] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state\r
                         *\r
                         *  \return Total number of buffered bytes received from the host\r
@@ -188,6 +197,9 @@
                         *  returns 0. The \ref CDC_Device_BytesReceived() function should be queried before data is received to ensure that no data\r
                         *  underflow occurs.\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] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state\r
                         *\r
                         *  \return Next received byte from the host, or 0 if no data received\r
@@ -196,6 +208,9 @@
                        \r
                        /** Flushes any data waiting to be sent, ensuring that the send buffer is cleared.\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] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state\r
                         *\r
                         *  \return A value from the \ref Endpoint_WaitUntilReady_ErrorCodes_t enum\r
@@ -207,6 +222,9 @@
                         *  until they are cleared via a second notification. This should be called each time the CDC class driver's \r
                         *  ControlLineStates.DeviceToHost value is updated to push the new states to the USB host.\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] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state\r
                         */\r
                        void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r