X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/ee744abb7efd5fef49782991d58895e10696809a..d41cd9a41aca81eaa21e65e6c53672fe604fa3d5:/LUFA/Drivers/USB/Class/Host/CDC.h
diff --git a/LUFA/Drivers/USB/Class/Host/CDC.h b/LUFA/Drivers/USB/Class/Host/CDC.h
index f3abb296e..fdbc7aee5 100644
--- a/LUFA/Drivers/USB/Class/Host/CDC.h
+++ b/LUFA/Drivers/USB/Class/Host/CDC.h
@@ -1,235 +1,334 @@
-/*
- LUFA Library
- Copyright (C) Dean Camera, 2009.
-
- dean [at] fourwalledcubicle [dot] com
- www.fourwalledcubicle.com
-*/
-
-/*
- Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
-
- Permission to use, copy, modify, and distribute this software
- and its documentation for any purpose and without fee is hereby
- granted, provided that the above copyright notice appear in all
- copies and that both that the copyright notice and this
- permission notice and warranty disclaimer appear in supporting
- documentation, and that the name of the author not be used in
- advertising or publicity pertaining to distribution of the
- software without specific, written prior permission.
-
- The author disclaim all warranties with regard to this
- software, including all implied warranties of merchantability
- and fitness. In no event shall the author be liable for any
- special, indirect or consequential damages or any damages
- whatsoever resulting from loss of use, data or profits, whether
- in an action of contract, negligence or other tortious action,
- arising out of or in connection with the use or performance of
- this software.
-*/
-
-/** \ingroup Group_USBClassCDC
- * @defgroup Group_USBClassCDCHost CDC Class Host Mode Driver
- *
- * \section Sec_Dependencies Module Source Dependencies
- * The following files must be built with any user project that uses this module:
- * - LUFA/Drivers/USB/Class/Host/CDC.c
- *
- * \section Module Description
- * Host Mode USB Class driver framework interface, for the CDC USB Class driver.
- *
- * @{
- */
-
-#ifndef __CDC_CLASS_HOST_H__
-#define __CDC_CLASS_HOST_H__
-
- /* Includes: */
- #include "../../USB.h"
- #include "../Common/CDC.h"
-
- /* Enable C linkage for C++ Compilers: */
- #if defined(__cplusplus)
- extern "C" {
- #endif
-
- /* Public Interface - May be used in end-application: */
- /* Type Defines: */
- /** Class state structure. An instance of this structure should be made within the user application,
- * and passed to each of the CDC class driver functions as the CDCInterfaceInfo parameter. This
- * stores each CDC interface's configuration and state information.
- */
- typedef struct
- {
- const struct
- {
- uint8_t DataINPipeNumber; /**< Pipe number of the CDC interface's IN data pipe */
- uint8_t DataOUTPipeNumber; /**< Pipe number of the CDC interface's OUT data pipe */
- uint8_t NotificationPipeNumber; /**< Pipe number of the CDC interface's IN notification endpoint, if used */
- } Config; /**< Config data for the USB class interface within the device. All elements in this section
- * must be set or the interface will fail to enumerate and operate correctly.
- */
- struct
- {
- bool Active; /**< Indicates if the current interface instance is connected to an attached device, valid
- * after \ref HID_Host_ConfigurePipes() is called and the Host state machine is in the
- * Configured state
- */
- uint8_t ControlInterfaceNumber; /**< Interface index of the CDC-ACM control interface within the attached device */
-
- uint16_t DataINPipeSize; /**< Size in bytes of the CDC interface's IN data pipe */
- uint16_t DataOUTPipeSize; /**< Size in bytes of the CDC interface's OUT data pipe */
- uint16_t NotificationPipeSize; /**< Size in bytes of the CDC interface's IN notification endpoint, if used */
-
- struct
- {
- uint8_t HostToDevice; /**< Control line states from the host to device, as a set of CDC_CONTROL_LINE_OUT_*
- * masks.
- */
- uint8_t DeviceToHost; /**< Control line states from the device to host, as a set of CDC_CONTROL_LINE_IN_*
- * masks.
- */
- } ControlLineStates;
-
- struct
- {
- uint32_t BaudRateBPS; /**< Baud rate of the virtual serial port, in bits per second */
- uint8_t CharFormat; /**< Character format of the virtual serial port, a value from the
- * CDCDevice_CDC_LineCodingFormats_t enum
- */
- uint8_t ParityType; /**< Parity setting of the virtual serial port, a value from the
- * CDCDevice_LineCodingParity_t enum
- */
- uint8_t DataBits; /**< Bits of data per character of the virtual serial port */
- } LineEncoding;
- } State; /**< State data for the USB class interface within the device. All elements in this section
- * may be set to initial values, but may also be ignored to default to sane values when
- * the interface is enumerated.
- */
- } USB_ClassInfo_CDC_Host_t;
-
- /* Enums: */
- /** Enum for the possible error codes returned by the \ref CDC_Host_ConfigurePipes() function. */
- enum
- {
- CDC_ENUMERROR_NoError = 0, /**< Configuration Descriptor was processed successfully */
- CDC_ENUMERROR_InvalidConfigDescriptor = 1, /**< The device returned an invalid Configuration Descriptor */
- CDC_ENUMERROR_NoCDCInterfaceFound = 2, /**< A compatible CDC interface was not found in the device's Configuration Descriptor */
- CDC_ENUMERROR_EndpointsNotFound = 3, /**< Compatible CDC endpoints were not found in the device's CDC interface */
- } CDCHost_EnumerationFailure_ErrorCodes_t;
-
- /* Function Prototypes: */
- /** General management task for a given CDC host class interface, required for the correct operation of the interface. This should
- * be called frequently in the main program loop, before the master USB management task \ref USB_USBTask().
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing an CDC Class host configuration and state
- */
- void CDC_Host_USBTask(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Host interface configuration routine, to configure a given CDC host interface instance using the Configuration
- * Descriptor read from an attached USB device. This function automatically updates the given CDC Host instance's
- * state values and configures the pipes required to communicate with the interface if it is found within the device.
- * This should be called once after the stack has enumerated the attached device, while the host state machine is in
- * the Addressed state.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing an CDC Class host configuration and state
- * \param[in] ConfigDescriptorLength Length of the attached device's Configuration Descriptor
- * \param[in] DeviceConfigDescriptor Pointer to a buffer containing the attached device's Configuration Descriptor
- */
- uint8_t CDC_Host_ConfigurePipes(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo, uint16_t ConfigDescriptorLength,
- uint8_t* DeviceConfigDescriptor) ATTR_NON_NULL_PTR_ARG(1, 3);
-
- /** Sets the line encoding for the attached device's virtual serial port. This should be called when the LineEncoding
- * values of the interface have been changed to push the new settings to the USB device.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class host configuration and state
- */
- uint8_t CDC_Host_SetLineEncoding(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Sends a Serial Control Line State Change notification to the device. This should be called when the virtual serial
- * control lines (DTR, RTS, etc.) have changed states. Line states persist until they are cleared via a second
- * notification. This should be called each time the CDC class driver's ControlLineStates.HostToDevice value is updated
- * to push the new states to the USB device.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class host configuration and state
- */
- uint8_t CDC_Host_SendControlLineStateChange(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Sends a given string to the attached USB device, if connected. If a device is not connected when the function is called, the
- * string is discarded.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class host configuration and state
- * \param[in] Data Pointer to the string to send to the device
- * \param[in] Length Size in bytes of the string to send to the device
- */
- void CDC_Host_SendString(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo, char* Data, uint16_t Length) ATTR_NON_NULL_PTR_ARG(1, 2);
-
- /** Sends a given byte to the attached USB device, if connected. If a host is not connected when the function is called, the
- * byte is discarded.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class host configuration and state
- * \param[in] Data Byte of data to send to the device
- */
- void CDC_Host_SendByte(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo, uint8_t Data) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Determines the number of bytes received by the CDC interface from the device, waiting to be read.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class host configuration and state
- *
- * \return Total number of buffered bytes received from the device
- */
- uint16_t CDC_Host_BytesReceived(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Reads a byte of data from the device. If no data is waiting to be read of if a USB device is not connected, the function
- * returns 0. The \ref CDC_Host_BytesReceived() function should be queried before data is recieved to ensure that no data
- * underflow occurs.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class host configuration and state
- *
- * \return Next received byte from the device, or 0 if no data received
- */
- uint8_t CDC_Host_ReceiveByte(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** CDC class driver event for a control line state change on a CDC host interface. This event fires each time the device notifies
- * the host of a control line state change (containing the virtual serial control line states, such as DCD) and may be hooked in the
- * user program by declaring a handler function with the same name and parameters listed here. The new control line states
- * are available in the ControlLineStates.DeviceToHost value inside the CDC host interface structure passed as a parameter, set as
- * a mask of CDC_CONTROL_LINE_IN_* masks.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class host configuration and state
- */
- void EVENT_CDC_Host_ControLineStateChanged(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /* Private Interface - For use in library only: */
- #if !defined(__DOXYGEN__)
- /* Macros: */
- #define CDC_CONTROL_CLASS 0x02
- #define CDC_CONTROL_SUBCLASS 0x02
- #define CDC_CONTROL_PROTOCOL 0x01
- #define CDC_DATA_CLASS 0x0A
- #define CDC_DATA_SUBCLASS 0x00
- #define CDC_DATA_PROTOCOL 0x00
-
- #define CDC_FOUND_DATAPIPE_IN (1 << 0)
- #define CDC_FOUND_DATAPIPE_OUT (1 << 1)
- #define CDC_FOUND_DATAPIPE_NOTIFICATION (1 << 2)
-
- /* Function Prototypes: */
- #if defined(INCLUDE_FROM_CDC_CLASS_HOST_C)
- void CDC_Host_Event_Stub(void);
- void EVENT_CDC_Host_ControLineStateChanged(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo)
- ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(CDC_Host_Event_Stub);
- static uint8_t DComp_CDC_Host_NextCDCControlInterface(void* CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
- static uint8_t DComp_CDC_Host_NextCDCDataInterface(void* CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
- static uint8_t DComp_CDC_Host_NextInterfaceCDCDataEndpoint(void* CurrentDescriptor);
- #endif
- #endif
-
- /* Disable C linkage for C++ Compilers: */
- #if defined(__cplusplus)
- }
- #endif
-
-#endif
-
-/** @} */
+/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2010.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
+
+ Permission to use, copy, modify, distribute, and sell this
+ software and its documentation for any purpose is hereby granted
+ without fee, provided that the above copyright notice appear in
+ all copies and that both that the copyright notice and this
+ permission notice and warranty disclaimer appear in supporting
+ documentation, and that the name of the author not be used in
+ advertising or publicity pertaining to distribution of the
+ software without specific, written prior permission.
+
+ The author disclaim all warranties with regard to this
+ software, including all implied warranties of merchantability
+ and fitness. In no event shall the author be liable for any
+ special, indirect or consequential damages or any damages
+ whatsoever resulting from loss of use, data or profits, whether
+ in an action of contract, negligence or other tortious action,
+ arising out of or in connection with the use or performance of
+ this software.
+*/
+
+/** \file
+ * \brief Host mode driver for the library USB CDC Class driver.
+ *
+ * Host mode driver for the library USB CDC Class driver.
+ *
+ * \note This file should not be included directly. It is automatically included as needed by the USB module driver
+ * dispatch header located in LUFA/Drivers/USB.h.
+ */
+
+/** \ingroup Group_USBClassCDC
+ * @defgroup Group_USBClassCDCHost CDC Class Host Mode Driver
+ *
+ * \section Sec_Dependencies Module Source Dependencies
+ * The following files must be built with any user project that uses this module:
+ * - LUFA/Drivers/USB/Class/Host/CDC.c (Makefile source module name: LUFA_SRC_USBCLASS)
+ *
+ * \section Module Description
+ * Host Mode USB Class driver framework interface, for the CDC USB Class driver.
+ *
+ * @{
+ */
+
+#ifndef __CDC_CLASS_HOST_H__
+#define __CDC_CLASS_HOST_H__
+
+ /* Includes: */
+ #include "../../USB.h"
+ #include "../Common/CDC.h"
+
+ #include
+ #include
+
+ /* Enable C linkage for C++ Compilers: */
+ #if defined(__cplusplus)
+ extern "C" {
+ #endif
+
+ /* Preprocessor Checks: */
+ #if !defined(__INCLUDE_FROM_CDC_DRIVER)
+ #error Do not include this file directly. Include LUFA/Drivers/USB.h instead.
+ #endif
+
+ #if defined(__INCLUDE_FROM_CDC_HOST_C) && defined(NO_STREAM_CALLBACKS)
+ #error The NO_STREAM_CALLBACKS compile time option cannot be used in projects using the library Class drivers.
+ #endif
+
+ /* Public Interface - May be used in end-application: */
+ /* Type Defines: */
+ /** \brief CDC Class Host Mode Configuration and State Structure.
+ *
+ * Class state structure. An instance of this structure should be made within the user application,
+ * and passed to each of the CDC class driver functions as the CDCInterfaceInfo parameter. This
+ * stores each CDC interface's configuration and state information.
+ */
+ typedef struct
+ {
+ const struct
+ {
+ uint8_t DataINPipeNumber; /**< Pipe number of the CDC interface's IN data pipe. */
+ bool DataINPipeDoubleBank; /**< Indicates if the CDC interface's IN data pipe should use double banking. */
+
+ uint8_t DataOUTPipeNumber; /**< Pipe number of the CDC interface's OUT data pipe. */
+ bool DataOUTPipeDoubleBank; /**< Indicates if the CDC interface's OUT data pipe should use double banking. */
+
+ uint8_t NotificationPipeNumber; /**< Pipe number of the CDC interface's IN notification endpoint, if used. */
+ bool NotificationPipeDoubleBank; /**< Indicates if the CDC interface's notification pipe should use double banking. */
+ } Config; /**< Config data for the USB class interface within the device. All elements in this section
+ * must be set or the interface will fail to enumerate and operate correctly.
+ */
+ struct
+ {
+ bool IsActive; /**< Indicates if the current interface instance is connected to an attached device, valid
+ * after \ref CDC_Host_ConfigurePipes() is called and the Host state machine is in the
+ * Configured state.
+ */
+ uint8_t ControlInterfaceNumber; /**< Interface index of the CDC-ACM control interface within the attached device. */
+
+ uint16_t DataINPipeSize; /**< Size in bytes of the CDC interface's IN data pipe. */
+ uint16_t DataOUTPipeSize; /**< Size in bytes of the CDC interface's OUT data pipe. */
+ uint16_t NotificationPipeSize; /**< Size in bytes of the CDC interface's IN notification pipe, if used. */
+
+ struct
+ {
+ uint8_t HostToDevice; /**< Control line states from the host to device, as a set of CDC_CONTROL_LINE_OUT_*
+ * masks - to notify the device of changes to these values, call the
+ * \ref CDC_Host_SendControlLineStateChange() function.
+ */
+ uint8_t DeviceToHost; /**< Control line states from the device to host, as a set of CDC_CONTROL_LINE_IN_*
+ * masks. This value is updated each time \ref CDC_Host_USBTask() is called.
+ */
+ } ControlLineStates; /**< Current states of the virtual serial port's control lines between the device and host. */
+
+ CDC_LineEncoding_t LineEncoding; /**< Line encoding used in the virtual serial port, for the device's information.
+ * This is generally only used if the virtual serial port data is to be
+ * reconstructed on a physical UART. When set by the host application, the
+ * \ref CDC_Host_SetLineEncoding() function must be called to push the changes
+ * to the device.
+ */
+ } State; /**< State data for the USB class interface within the device. All elements in this section
+ * may be set to initial values, but may also be ignored to default to sane values when
+ * the interface is enumerated.
+ */
+ } USB_ClassInfo_CDC_Host_t;
+
+ /* Enums: */
+ /** Enum for the possible error codes returned by the \ref CDC_Host_ConfigurePipes() function. */
+ enum CDC_Host_EnumerationFailure_ErrorCodes_t
+ {
+ CDC_ENUMERROR_NoError = 0, /**< Configuration Descriptor was processed successfully. */
+ CDC_ENUMERROR_InvalidConfigDescriptor = 1, /**< The device returned an invalid Configuration Descriptor. */
+ CDC_ENUMERROR_NoCompatibleInterfaceFound = 2, /**< A compatible CDC interface was not found in the device's Configuration Descriptor. */
+ };
+
+ /* Function Prototypes: */
+ /** General management task for a given CDC host class interface, required for the correct operation of the interface. This should
+ * be called frequently in the main program loop, before the master USB management task \ref USB_USBTask().
+ *
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing an CDC Class host configuration and state.
+ */
+ void CDC_Host_USBTask(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
+
+ /** Host interface configuration routine, to configure a given CDC host interface instance using the Configuration
+ * Descriptor read from an attached USB device. This function automatically updates the given CDC Host instance's
+ * state values and configures the pipes required to communicate with the interface if it is found within the device.
+ * This should be called once after the stack has enumerated the attached device, while the host state machine is in
+ * the Addressed state.
+ *
+ * \note The pipe index numbers as given in the interface's configuration structure must not overlap with any other
+ * interface, or pipe bank corruption will occur. Gaps in the allocated pipe numbers or non-sequential indexes
+ * within a single interface is allowed, but no two interfaces of any type have have interleaved pipe indexes.
+ *
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing an CDC Class host configuration and state.
+ * \param[in] ConfigDescriptorSize Length of the attached device's Configuration Descriptor.
+ * \param[in] DeviceConfigDescriptor Pointer to a buffer containing the attached device's Configuration Descriptor.
+ *
+ * \return A value from the \ref CDC_Host_EnumerationFailure_ErrorCodes_t enum.
+ */
+ uint8_t CDC_Host_ConfigurePipes(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
+ uint16_t ConfigDescriptorSize,
+ void* DeviceConfigDescriptor) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(3);
+
+ /** Sets the line encoding for the attached device's virtual serial port. This should be called when the LineEncoding
+ * values of the interface have been changed to push the new settings to the USB device.
+ *
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class host configuration and state.
+ *
+ * \return A value from the \ref USB_Host_SendControlErrorCodes_t enum.
+ */
+ uint8_t CDC_Host_SetLineEncoding(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
+
+ /** Sends a Serial Control Line State Change notification to the device. This should be called when the virtual serial
+ * control lines (DTR, RTS, etc.) have changed states. Line states persist until they are cleared via a second
+ * notification. This should be called each time the CDC class driver's ControlLineStates.HostToDevice value is updated
+ * to push the new states to the USB device.
+ *
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class host configuration and state.
+ *
+ * \return A value from the \ref USB_Host_SendControlErrorCodes_t enum.
+ */
+ uint8_t CDC_Host_SendControlLineStateChange(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
+
+ /** Sends a Send Break request to the device. This is generally used to separate data data or to indicate a special condition
+ * to the receiving device.
+ *
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class host configuration and state.
+ * \param[in] Duration Duration of the break, in milliseconds.
+ *
+ * \return A value from the \ref USB_Host_SendControlErrorCodes_t enum.
+ */
+ uint8_t CDC_Host_SendBreak(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
+ const uint8_t Duration) ATTR_NON_NULL_PTR_ARG(1);
+
+ /** Sends a given string to the attached USB device, if connected. If a device is not connected when the function is called, the
+ * string is discarded. Bytes will be queued for transmission to the device until either the pipe bank becomes full, or the
+ * \ref CDC_Host_Flush() function is called to flush the pending data to the host. This allows for multiple bytes to be
+ * packed into a single pipe packet, increasing data throughput.
+ *
+ * \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
+ * call will fail.
+ *
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class host configuration and state.
+ * \param[in] Data Pointer to the string to send to the device.
+ * \param[in] Length Size in bytes of the string to send to the device.
+ *
+ * \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum.
+ */
+ uint8_t CDC_Host_SendString(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
+ const char* const Data,
+ const uint16_t Length) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
+
+ /** Sends a given byte to the attached USB device, if connected. If a device is not connected when the function is called, the
+ * byte is discarded. Bytes will be queued for transmission to the device until either the pipe bank becomes full, or the
+ * \ref CDC_Host_Flush() function is called to flush the pending data to the host. This allows for multiple bytes to be
+ * packed into a single pipe packet, increasing data throughput.
+ *
+ * \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
+ * call will fail.
+ *
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class host configuration and state.
+ * \param[in] Data Byte of data to send to the device.
+ *
+ * \return A value from the \ref Pipe_WaitUntilReady_ErrorCodes_t enum.
+ */
+ uint8_t CDC_Host_SendByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
+ const uint8_t Data) ATTR_NON_NULL_PTR_ARG(1);
+
+ /** Determines the number of bytes received by the CDC interface from the device, waiting to be read. This indicates the number
+ * of bytes in the IN pipe bank only, and thus the number of calls to \ref CDC_Host_ReceiveByte() which are guaranteed to succeed
+ * immediately. If multiple bytes are to be received, they should be buffered by the user application, as the pipe bank will not be
+ * released back to the USB controller until all bytes are read.
+ *
+ * \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
+ * call will fail.
+ *
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class host configuration and state.
+ *
+ * \return Total number of buffered bytes received from the device.
+ */
+ uint16_t CDC_Host_BytesReceived(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
+
+ /** Reads a byte of data from the device. If no data is waiting to be read of if a USB device is not connected, the function
+ * returns a negative value. The \ref CDC_Host_BytesReceived() function may be queried in advance to determine how many bytes
+ * are currently buffered in the CDC interface's data receive pipe.
+ *
+ * \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
+ * call will fail.
+ *
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class host configuration and state.
+ *
+ * \return Next received byte from the device, or a negative value if no data received.
+ */
+ int16_t CDC_Host_ReceiveByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
+
+ /** Flushes any data waiting to be sent, ensuring that the send buffer is cleared.
+ *
+ * \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
+ * call will fail.
+ *
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class host configuration and state.
+ *
+ * \return A value from the \ref Pipe_WaitUntilReady_ErrorCodes_t enum.
+ */
+ uint8_t CDC_Host_Flush(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
+
+ /** Creates a standard character stream for the given CDC Device instance so that it can be used with all the regular
+ * functions in the avr-libc library that accept a FILE stream as a destination (e.g. fprintf). The created
+ * stream is bidirectional and can be used for both input and output functions.
+ *
+ * \note The created stream can be given as stdout if desired to direct the standard output from all functions
+ * to the given CDC interface.
+ *
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
+ * \param[in,out] Stream Pointer to a FILE structure where the created stream should be placed.
+ */
+ void CDC_Host_CreateStream(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
+ FILE* const Stream);
+
+ /** Identical to CDC_Host_CreateStream(), except that reads are blocking until the calling stream function terminates
+ * the transfer. While blocking, the USB and CDC service tasks are called repeatedly to maintain USB communications.
+ *
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state.
+ * \param[in,out] Stream Pointer to a FILE structure where the created stream should be placed.
+ */
+ void CDC_Host_CreateBlockingStream(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo,
+ FILE* const Stream);
+
+ /** CDC class driver event for a control line state change on a CDC host interface. This event fires each time the device notifies
+ * the host of a control line state change (containing the virtual serial control line states, such as DCD) and may be hooked in the
+ * user program by declaring a handler function with the same name and parameters listed here. The new control line states
+ * are available in the ControlLineStates.DeviceToHost value inside the CDC host interface structure passed as a parameter, set as
+ * a mask of CDC_CONTROL_LINE_IN_* masks.
+ *
+ * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class host configuration and state.
+ */
+ void EVENT_CDC_Host_ControLineStateChanged(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
+
+ /* Private Interface - For use in library only: */
+ #if !defined(__DOXYGEN__)
+ /* Function Prototypes: */
+ #if defined(__INCLUDE_FROM_CDC_HOST_C)
+ static int CDC_Host_putchar(char c,
+ FILE* Stream) ATTR_NON_NULL_PTR_ARG(2);
+ static int CDC_Host_getchar(FILE* Stream) ATTR_NON_NULL_PTR_ARG(1);
+ static int CDC_Host_getchar_Blocking(FILE* Stream) ATTR_NON_NULL_PTR_ARG(1);
+
+ void CDC_Host_Event_Stub(void);
+ void EVENT_CDC_Host_ControLineStateChanged(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
+ ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(CDC_Host_Event_Stub);
+
+ static uint8_t DCOMP_CDC_Host_NextCDCControlInterface(void* const CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
+ static uint8_t DCOMP_CDC_Host_NextCDCDataInterface(void* const CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
+ static uint8_t DCOMP_CDC_Host_NextCDCInterfaceEndpoint(void* const CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
+ #endif
+ #endif
+
+ /* Disable C linkage for C++ Compilers: */
+ #if defined(__cplusplus)
+ }
+ #endif
+
+#endif
+
+/** @} */
+