Manually pull PDI clock pin high for 1ms before disabling PDI mode in the AVRISP...

[pub/USBasp.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 c0d1ccd..d248868 100644 (file)
--- a/LUFA/Drivers/USB/Class/Device/CDC.h
+++ b/LUFA/Drivers/USB/Class/Device/CDC.h
@@ -1,21 +1,21 @@
 /*\r
              LUFA Library\r
 /*\r
              LUFA Library\r

-     Copyright (C) Dean Camera, 2009.\r
+     Copyright (C) Dean Camera, 2010.\r

               \r
   dean [at] fourwalledcubicle [dot] com\r
       www.fourwalledcubicle.com\r
 */\r
 \r
 /*\r
               \r
   dean [at] fourwalledcubicle [dot] com\r
       www.fourwalledcubicle.com\r
 */\r
 \r
 /*\r

-  Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)\r
+  Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)\r

 \r
 \r

-  Permission to use, copy, modify, and distribute this software\r
-  and its documentation for any purpose and without fee is hereby\r
-  granted, provided that the above copyright notice appear in all\r
-  copies and that both that the copyright notice and this\r
-  permission notice and warranty disclaimer appear in supporting\r
-  documentation, and that the name of the author not be used in\r
-  advertising or publicity pertaining to distribution of the\r
+  Permission to use, copy, modify, distribute, and sell this \r
+  software and its documentation for any purpose is hereby granted\r
+  without fee, provided that the above copyright notice appear in \r
+  all copies and that both that the copyright notice and this\r
+  permission notice and warranty disclaimer appear in supporting \r
+  documentation, and that the name of the author not be used in \r
+  advertising or publicity pertaining to distribution of the \r

   software without specific, written prior permission.\r
 \r
   The author disclaim all warranties with regard to this\r
   software without specific, written prior permission.\r
 \r
   The author disclaim all warranties with regard to this\r


@@ -28,26 +28,44 @@
   this software.\r
 */\r
 \r
   this software.\r
 */\r
 \r

-/** \ingroup Group_USBDeviceClassDrivers\r
- *  @defgroup Group_USBClassCDCDevice CDC Device Class Driver - LUFA/Drivers/Class/Device/CDC.h\r
+/** \ingroup Group_USBClassCDC\r
+ *  @defgroup Group_USBClassCDCDevice CDC Class Device Mode Driver\r

  *\r
  *  \section Sec_Dependencies Module Source Dependencies\r
  *  The following files must be built with any user project that uses this module:\r
  *    - LUFA/Drivers/USB/Class/Device/CDC.c\r
  *\r
  *  \section Module Description\r
  *\r
  *  \section Sec_Dependencies Module Source Dependencies\r
  *  The following files must be built with any user project that uses this module:\r
  *    - LUFA/Drivers/USB/Class/Device/CDC.c\r
  *\r
  *  \section Module Description\r

- *  Functions, macros, variables, enums and types related to the management of USB CDC Class interfaces\r
- *  within a USB device, for the implementation of CDC-ACM virtual serial ports.\r
+ *  Device Mode USB Class driver framework interface, for the CDC USB Class driver.\r
+ *\r
+ *  \note There are several major drawbacks to the CDC-ACM standard USB class, however\r
+ *        it is very standardized and thus usually available as a built-in driver on\r
+ *        most platforms, and so is a better choice than a proprietary serial class.\r
+ *        \r
+ *        One major issue with CDC-ACM is that it requires two Interface descriptors,\r
+ *        which will upset most hosts when part of a multi-function "Composite" USB\r
+ *        device, as each interface will be loaded into a separate driver instance. To\r
+ *        conbat this, you should use the "Interface Association Descriptor" addendum to\r
+ *        the USB standard which is available on most OSes when creating Composite devices.\r
+ *\r
+ *        Another major oversight is that there is no mechanism for the host to notify the\r
+ *        device that there is a data sink on the host side ready to accept data. This\r
+ *        means that the device may try to send data while the host isn't listening, causing\r
+ *        lengthy blocking timeouts in the transmission routines. To combat this, it is\r
+ *        recommended that the virtual serial line DTR (Data Terminal Ready) be used where\r
+ *        possible to determine if a host application is ready for data.\r

  *\r
  *  @{\r
  */\r
  \r
  *\r
  *  @{\r
  */\r
  \r

-#ifndef _CDC_CLASS_H_\r
-#define _CDC_CLASS_H_\r
+#ifndef _CDC_CLASS_DEVICE_H_\r
+#define _CDC_CLASS_DEVICE_H_\r

 \r
        /* Includes: */\r
                #include "../../USB.h"\r
 \r
        /* Includes: */\r
                #include "../../USB.h"\r

+               #include "../Common/CDC.h"\r

 \r
 \r

+               #include <stdio.h>\r

                #include <string.h>\r
 \r
        /* Enable C linkage for C++ Compilers: */\r
                #include <string.h>\r
 \r
        /* Enable C linkage for C++ Compilers: */\r


@@ -55,231 +73,225 @@
                        extern "C" {\r
                #endif\r
 \r
                        extern "C" {\r
                #endif\r
 \r

-       /* Macros: */\r
-               /** CDC Class specific request to get the current virtual serial port configuration settings. */\r
-               #define REQ_GetLineEncoding              0x21\r
+       /* Public Interface - May be used in end-application: */\r
+               /* Type Defines: */\r
+                       /** Class state structure. An instance of this structure should be made for each CDC interface\r
+                        *  within the user application, and passed to each of the CDC class driver functions as the\r
+                        *  CDCInterfaceInfo parameter. This stores each CDC interface's configuration and state information.\r
+                        */\r
+                       typedef struct\r
+                       {\r
+                               const struct\r
+                               {\r
+                                       uint8_t  ControlInterfaceNumber; /**< Interface number of the CDC control interface within the device */\r

 \r
 \r

-               /** CDC Class specific request to set the current virtual serial port configuration settings. */\r
-               #define REQ_SetLineEncoding              0x20\r
+                                       uint8_t  DataINEndpointNumber; /**< Endpoint number of the CDC interface's IN data endpoint */\r
+                                       uint16_t DataINEndpointSize; /**< Size in bytes of the CDC interface's IN data endpoint */\r
+                                       bool     DataINEndpointDoubleBank; /** Indicates if the CDC interface's IN data endpoint should use double banking */\r

 \r
 \r

-               /** CDC Class specific request to set the current virtual serial port handshake line states. */\r
-               #define REQ_SetControlLineState          0x22\r
-               \r
-               /** Notification type constant for a change in the virtual serial port handshake line states, for\r
-                *  use with a USB_Notification_Header_t notification structure when sent to the host via the CDC \r
-                *  notification endpoint.\r
-                */\r
-               #define NOTIF_SerialState                0x20\r
+                                       uint8_t  DataOUTEndpointNumber; /**< Endpoint number of the CDC interface's OUT data endpoint */\r
+                                       uint16_t DataOUTEndpointSize;  /**< Size in bytes of the CDC interface's OUT data endpoint */\r
+                                       bool     DataOUTEndpointDoubleBank; /** Indicates if the CDC interface's OUT data endpoint should use double banking */\r

 \r
 \r

-               /** Mask for the DTR handshake line for use with the REQ_SetControlLineState class specific request\r
-                *  from the host, to indicate that the DTR line state should be high.\r
-                */\r
-               #define CDC_CONTROL_LINE_OUT_DTR         (1 << 0)\r
+                                       uint8_t  NotificationEndpointNumber; /**< Endpoint number of the CDC interface's IN notification endpoint, if used */\r
+                                       uint16_t NotificationEndpointSize;  /**< Size in bytes of the CDC interface's IN notification endpoint, if used */\r
+                                       bool     NotificationEndpointDoubleBank; /** Indicates if the CDC interface's notification endpoint should use double banking */\r
+                               } Config; /**< Config data for the USB class interface within the device. All elements in this section\r
+                                          *   <b>must</b> be set or the interface will fail to enumerate and operate correctly.\r
+                                          */\r
+                               struct\r
+                               {\r
+                                       struct\r
+                                       {\r
+                                               uint8_t HostToDevice; /**< Control line states from the host to device, as a set of CDC_CONTROL_LINE_OUT_*\r
+                                                                                          *   masks.\r
+                                                                                          */\r
+                                               uint8_t DeviceToHost; /**< Control line states from the device to host, as a set of CDC_CONTROL_LINE_IN_*\r
+                                                                                          *   masks.\r
+                                                                                          */\r
+                                       } ControlLineStates;\r

 \r
 \r

-               /** Mask for the RTS handshake line for use with the REQ_SetControlLineState class specific request\r
-                *  from the host, to indicate that theRTS line state should be high.\r
-                */\r
-               #define CDC_CONTROL_LINE_OUT_RTS         (1 << 1)\r
+                                       struct\r
+                                       {\r
+                                               uint32_t BaudRateBPS; /**< Baud rate of the virtual serial port, in bits per second */\r
+                                               uint8_t  CharFormat; /**< Character format of the virtual serial port, a value from the\r
+                                                                                         *   CDCDevice_CDC_LineCodingFormats_t enum\r
+                                                                                         */\r
+                                               uint8_t  ParityType; /**< Parity setting of the virtual serial port, a value from the\r
+                                                                                         *   CDCDevice_LineCodingParity_t enum\r
+                                                                                         */\r
+                                               uint8_t  DataBits; /**< Bits of data per character of the virtual serial port */\r
+                                       } LineEncoding;                 \r
+                               } State; /**< State data for the USB class interface within the device. All elements in this section\r
+                                         *   are reset to their defaults when the interface is enumerated.\r
+                                         */\r
+                       } USB_ClassInfo_CDC_Device_t;\r

                \r
                \r

-               /** Mask for the DCD handshake line for use with the a NOTIF_SerialState class specific notification\r
-                *  from the device to the host, to indicate that the DCD line state is currently high.\r
-                */\r
-               #define CDC_CONTROL_LINE_IN_DCD          (1 << 0)\r
-\r
-               /** Mask for the DSR handshake line for use with the a NOTIF_SerialState class specific notification\r
-                *  from the device to the host, to indicate that the DSR line state is currently high.\r
-                */\r
-               #define CDC_CONTROL_LINE_IN_DSR          (1 << 1)\r
-\r
-               /** Mask for the BREAK handshake line for use with the a NOTIF_SerialState class specific notification\r
-                *  from the device to the host, to indicate that the BREAK line state is currently high.\r
-                */\r
-               #define CDC_CONTROL_LINE_IN_BREAK        (1 << 2)\r
+               /* Function Prototypes: */              \r
+                       /** Configures the endpoints of a given CDC interface, ready for use. This should be linked to the library\r
+                        *  \ref EVENT_USB_Device_ConfigurationChanged() event so that the endpoints are configured when the configuration containing\r
+                        *  the given CDC interface is selected.\r
+                        *\r
+                        *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state\r
+                        *\r
+                        *  \return Boolean true if the endpoints were successfully configured, false otherwise\r
+                        */\r
+                       bool CDC_Device_ConfigureEndpoints(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r

 \r
 \r

-               /** Mask for the RING handshake line for use with the a NOTIF_SerialState class specific notification\r
-                *  from the device to the host, to indicate that the RING line state is currently high.\r
-                */\r
-               #define CDC_CONTROL_LINE_IN_RING         (1 << 3)\r
+                       /** Processes incoming control requests from the host, that are directed to the given CDC class interface. This should be\r
+                        *  linked to the library \ref EVENT_USB_Device_UnhandledControlRequest() event.\r
+                        *\r
+                        *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state\r
+                        */\r
+                       void CDC_Device_ProcessControlRequest(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r

 \r
 \r

-               /** Mask for use with the a NOTIF_SerialState class specific notification from the device to the host,\r
-                *  to indicate that a framing error has occurred on the virtual serial port.\r
-                */\r
-               #define CDC_CONTROL_LINE_IN_FRAMEERROR   (1 << 4)\r
+                       /** General management task for a given CDC class interface, required for the correct operation of the interface. This should\r
+                        *  be called frequently in the main program loop, before the master USB management task \ref USB_USBTask().\r
+                        *\r
+                        *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state\r
+                        */\r
+                       void CDC_Device_USBTask(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r

 \r
 \r

-               /** Mask for use with the a NOTIF_SerialState class specific notification from the device to the host,\r
-                *  to indicate that a parity error has occurred on the virtual serial port.\r
-                */\r
-               #define CDC_CONTROL_LINE_IN_PARITYERROR  (1 << 5)\r
+                       /** CDC class driver event for a line encoding change on a CDC interface. This event fires each time the host requests a\r
+                        *  line encoding change (containing the serial parity, baud and other configuration information) and may be hooked in the\r
+                        *  user program by declaring a handler function with the same name and parameters listed here. The new line encoding\r
+                        *  settings are available in the LineEncoding structure inside the CDC interface structure passed as a parameter.\r
+                        *\r
+                        *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state\r
+                        */\r
+                       void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r
+                       \r
+                       /** CDC class driver event for a control line state change on a CDC interface. This event fires each time the host requests a\r
+                        *  control line state change (containing the virtual serial control line states, such as DTR) and may be hooked in the\r
+                        *  user program by declaring a handler function with the same name and parameters listed here. The new control line states\r
+                        *  are available in the ControlLineStates.HostToDevice value inside the CDC interface structure passed as a parameter, set as\r
+                        *  a mask of CDC_CONTROL_LINE_OUT_* masks.\r
+                        *\r
+                        *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state\r
+                        */\r
+                       void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r

 \r
 \r

-               /** Mask for use with the a NOTIF_SerialState class specific notification from the device to the host,\r
-                *  to indicate that a data overrun error has occurred on the virtual serial port.\r
-                */\r
-               #define CDC_CONTROL_LINE_IN_OVERRUNERROR (1 << 6)\r
-               \r
-               /** Macro to define a CDC class-specific functional descriptor. CDC functional descriptors have a\r
-                *  uniform structure but variable sized data payloads, thus cannot be represented accurately by\r
-                *  a single typedef struct. A macro is used instead so that functional descriptors can be created\r
-                *  easily by specifying the size of the payload. This allows sizeof() to work correctly.\r
-                *\r
-                *  \param DataSize  Size in bytes of the CDC functional descriptor's data payload\r
-                */\r
-               #define CDC_FUNCTIONAL_DESCRIPTOR(DataSize)        \\r
-                    struct                                        \\r
-                    {                                             \\r
-                         USB_Descriptor_Header_t Header;          \\r
-                             uint8_t                 SubType;         \\r
-                         uint8_t                 Data[DataSize];  \\r
-                    }\r
-\r
-       /* Enums: */\r
-               /** Enum for the possible line encoding formats of a virtual serial port. */\r
-               enum CDCDevice_CDC_LineCodingFormats_t\r
-               {\r
-                       CDC_LINEENCODING_OneStopBit          = 0, /**< Each frame contains one stop bit */\r
-                       CDC_LINEENCODING_OneAndAHalfStopBits = 1, /**< Each frame contains one and a half stop bits */\r
-                       CDC_LINEENCODING_TwoStopBits         = 2, /**< Each frame contains two stop bits */\r
-               };\r
-               \r
-               /** Enum for the possible line encoding parity settings of a virtual serial port. */\r
-               enum CDCDevice_LineCodingParity_t\r
-               {\r
-                       CDC_PARITY_None    = 0, /**< No parity bit mode on each frame */\r
-                       CDC_PARITY_Odd     = 1, /**< Odd parity bit mode on each frame */\r
-                       CDC_PARITY_Even    = 2, /**< Even parity bit mode on each frame */\r
-                       CDC_PARITY_Mark    = 3, /**< Mark parity bit mode on each frame */\r
-                       CDC_PARITY_Space   = 4, /**< Space parity bit mode on each frame */\r
-               };\r
+                       /** 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. Bytes will be queued for transmission to the host until either the endpoint bank becomes full, or the\r
+                        *  \ref CDC_Device_Flush() function is called to flush the pending data to the host. This allows for multiple bytes to be \r
+                        *  packed into a single endpoint packet, increasing data throughput.\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
+                        *\r
+                        *  \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum\r
+                        */\r
+                       uint8_t CDC_Device_SendString(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, char* const Data, const uint16_t Length)\r
+                                                     ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);\r
+                       \r
+                       /** 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. Bytes will be queued for transmission to the host until either the endpoint bank becomes full, or the\r
+                        *  \ref CDC_Device_Flush() function is called to flush the pending data to the host. This allows for multiple bytes to be \r
+                        *  packed into a single endpoint packet, increasing data throughput.\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
+                        *  \return A value from the \ref Endpoint_WaitUntilReady_ErrorCodes_t enum\r
+                        */\r
+                       uint8_t CDC_Device_SendByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, const uint8_t Data) ATTR_NON_NULL_PTR_ARG(1);\r
+                       \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
+                        */\r
+                       uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r
+                       \r
+                       /** Reads a byte of data from the host. If no data is waiting to be read of if a USB host is not connected, the function\r
+                        *  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
+                        */\r
+                       uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r
+                       \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
+                        */\r
+                       uint8_t CDC_Device_Flush(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);\r
+                       \r
+                       /** Sends a Serial Control Line State Change notification to the host. This should be called when the virtual serial\r
+                        *  control lines (DCD, DSR, etc.) have changed states, or to give BREAK notifications to the host. Line states persist\r
+                        *  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

 \r
 \r

-       /* Type Defines: */\r
-               /** Class state structure. An instance of this structure should be made for each CDC interface\r
-                *  within the user application, and passed to each of the CDC class driver functions as the\r
-                *  CDCInterfaceInfo parameter. The contents of this structure should be set to their correct\r
-                *  values when used, or ommitted to force the library to use default values.\r
-                */\r
-               typedef struct\r
-               {\r
-                       uint8_t  ControlInterfaceNumber; /**< Interface number of the CDC control interface within the device */\r
+                       /** Creates a standard characer stream for the given CDC Device instance so that it can be used with all the regular\r
+                        *  functions in the avr-libc <stdio.h> library that accept a FILE stream as a destination (e.g. fprintf). The created\r
+                        *  stream is bidirectional and can be used for both input and output functions.\r
+                        *\r
+                        *  Reading data from this stream is non-blocking, i.e. in most instances, complete strings cannot be read in by a single\r
+                        *  fetch, as the endpoint will not be ready at some point in the transmission, aborting the transfer. However, this may\r
+                        *  be used when the read data is processed byte-per-bye (via getc()) or when the user application will implement its own\r
+                        *  line buffering.\r
+                        *\r
+                        *  \note The created stream can be given as stdout if desired to direct the standard output from all <stdio.h> functions\r
+                        *        to the given CDC interface.\r
+                        *\r
+                        *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state\r
+                        *  \param[in,out] Stream  Pointer to a FILE structure where the created stream should be placed\r
+                        */\r
+                       void CDC_Device_CreateStream(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, FILE* Stream);\r

 \r
 \r

-                       uint8_t  DataINEndpointNumber; /**< Endpoint number of the CDC interface's IN data endpoint */\r
-                       uint16_t DataINEndpointSize; /**< Size in bytes of the CDC interface's IN data endpoint */\r
+                       /** Identical to CDC_Device_CreateStream(), except that reads are blocking until the calling stream function terminates\r
+                        *  the transfer. While blocking, the USB and CDC service tasks are called repeatedly to maintain USB communications.\r
+                        *\r
+                        *  \param[in,out] CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state\r
+                        *  \param[in,out] Stream  Pointer to a FILE structure where the created stream should be placed\r
+                        */\r
+                       void CDC_Device_CreateBlockingStream(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, FILE* Stream);\r

 \r
 \r

-                       uint8_t  DataOUTEndpointNumber; /**< Endpoint number of the CDC interface's OUT data endpoint */\r
-                       uint16_t DataOUTEndpointSize;  /**< Size in bytes of the CDC interface's OUT data endpoint */\r
+       /* Private Interface - For use in library only: */\r
+       #if !defined(__DOXYGEN__)\r
+               /* Function Prototypes: */\r
+                       #if defined(INCLUDE_FROM_CDC_CLASS_DEVICE_C)\r
+                               static int CDC_Device_putchar(char c, FILE* Stream);\r
+                               static int CDC_Device_getchar(FILE* Stream);\r
+                               static int CDC_Device_getchar_Blocking(FILE* Stream);\r
+                               \r
+                               void CDC_Device_Event_Stub(void);\r
+                               void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)\r
+                                                                                                                 ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(CDC_Device_Event_Stub);\r
+                               void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)\r
+                                                                                                                        ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(CDC_Device_Event_Stub);\r
+                       #endif\r

 \r
 \r

-                       uint8_t  NotificationEndpointNumber; /**< Endpoint number of the CDC interface's IN notification endpoint, if used */\r
-                       uint16_t NotificationEndpointSize;  /**< Size in bytes of the CDC interface's IN notification endpoint, if used */\r
-\r
-                       uint8_t  ControlLineState; /**< Current control line states, as set by the host */\r
-\r
-                       struct\r
-                       {\r
-                               uint32_t BaudRateBPS; /**< Baud rate of the virtual serial port, in bits per second */\r
-                               uint8_t  CharFormat; /**< Character format of the virtual serial port, a value from the\r
-                                                                         *   CDCDevice_CDC_LineCodingFormats_t enum\r
-                                                                         */\r
-                               uint8_t  ParityType; /**< Parity setting of the virtual serial port, a value from the\r
-                                                                         *   CDCDevice_LineCodingParity_t enum\r
-                                                                         */\r
-                               uint8_t  DataBits; /**< Bits of data per character of the virtual serial port */\r
-                       } LineEncoding;\r
-               } USB_ClassInfo_CDC_t;\r
-               \r
-       /* Function Prototypes: */\r
-               #if defined(INCLUDE_FROM_CDC_CLASS_C)\r
-                       void CDC_Device_Event_Stub(void);\r
-                       void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_t* CDCInterfaceInfo)\r
-                                                                                                     ATTR_WEAK ATTR_ALIAS(CDC_Device_Event_Stub);\r
-                       void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_t* CDCInterfaceInfo)\r
-                                                                    ATTR_WEAK ATTR_ALIAS(CDC_Device_Event_Stub);\r
-               #endif\r
+       #endif\r

        \r
        \r

-               /** Configures the endpoints of a given CDC interface, ready for use. This should be linked to the library\r
-                *  \ref EVENT_USB_ConfigurationChanged() event so that the endpoints are configured when the configuration containing the\r
-                *  given CDC interface is selected.\r
-                *\r
-                *  \param CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
-                *\r
-                *  \return Boolean true if the endpoints were sucessfully configured, false otherwise\r
-                */\r
-               bool CDC_Device_ConfigureEndpoints(USB_ClassInfo_CDC_t* CDCInterfaceInfo);\r
-\r
-               /** Processes incomming control requests from the host, that are directed to the given CDC class interface. This should be\r
-                *  linked to the library \ref EVENT_USB_UnhandledControlPacket() event.\r
-                *\r
-                *  \param CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
-                */\r
-               void CDC_Device_ProcessControlPacket(USB_ClassInfo_CDC_t* CDCInterfaceInfo);\r
-\r
-               /** General management task for a given CDC class interface, required for the correct operation of the interface. This should\r
-                *  be called frequently in the main program loop, before the master USB management task \ref USB_USBTask().\r
-                *\r
-                *  \param CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
-                */\r
-               void CDC_Device_USBTask(USB_ClassInfo_CDC_t* CDCInterfaceInfo);\r
-\r
-               /** CDC class driver event for a line encoding change on a CDC interface. This event fires each time the host requests a\r
-                *  line encoding change (containing the serial parity, baud and other configuration information) and may be hooked in the\r
-                *  user program by declaring a handler function with the same name and parameters listed here. The new line encoding\r
-                *  settings are available in the LineEncoding structure inside the CDC interface structure passed as a parameter.\r
-                *\r
-                *  \param CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
-                */\r
-               void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_t* CDCInterfaceInfo);\r
-               \r
-               /** CDC class driver event for a control line state change on a CDC interface. This event fires each time the host requests a\r
-                *  control line state change (containing the virtual serial control line states, such as DTR) and may be hooked in the\r
-                *  user program by declaring a handler function with the same name and parameters listed here. The new control line states\r
-                *  are available in the ControlLineState value inside the CDC interface structure passed as a parameter, set as a mask of\r
-                *  CDC_CONTROL_LINE_OUT_* masks.\r
-                *\r
-                *  \param CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
-                */             \r
-               void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_t* CDCInterfaceInfo);\r
-\r
-               /** 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
-                *  \param CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
-                *  \param Data  Pointer to the string to send to the host\r
-                *  \param Length  Size in bytes of the string to send to the host\r
-                */\r
-               void CDC_Device_SendString(USB_ClassInfo_CDC_t* CDCInterfaceInfo, char* Data, uint16_t Length);\r
-               \r
-               /** 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
-                *  \param CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
-                *  \param Data  Byte of data to send to the host\r
-                */\r
-               void CDC_Device_SendByte(USB_ClassInfo_CDC_t* CDCInterfaceInfo, uint8_t Data);\r
-               \r
-               /** Determines the number of bytes received by the CDC interface from the host, waiting to be read.\r
-                *\r
-                *  \param 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
-                */\r
-               uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_t* CDCInterfaceInfo);\r
-               \r
-               /** Reads a byte of data from the host. If no data is waiting to be read of if a USB host is not connected, the function\r
-                *  returns 0. The USB_CDC_BytesReceived() function should be queried before data is recieved to ensure that no data\r
-                *  underflow occurs.\r
-                *\r
-                *  \param 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
-                */\r
-               uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_t* CDCInterfaceInfo);\r
-               \r
-               /** Sends a Serial Control Line State Change notification to the host. This should be called when the virtual serial control\r
-                *  lines (DCD, DSR, etc.) have changed states, or to give BREAK notfications to the host. Line states persist until they are\r
-                *  cleared via a second notification.\r
-                *\r
-                *  \param CDCInterfaceInfo  Pointer to a structure containing a CDC Class configuration and state.\r
-                *  \param LineStateMask  Mask of CDC_CONTROL_LINE_IN_* masks giving the current control line states\r
-                */\r
-               void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_t* CDCInterfaceInfo, uint16_t LineStateMask);\r
-\r

        /* Disable C linkage for C++ Compilers: */\r
                #if defined(__cplusplus)\r
                        }\r
        /* Disable C linkage for C++ Compilers: */\r
                #if defined(__cplusplus)\r
                        }\r