diff options
| author | Dean <Dean@d5102386-fcda-11dd-9fdb-3debd5008f28> | 2010-05-08 03:12:14 +0000 |
|---|---|---|
| committer | Dean <Dean@d5102386-fcda-11dd-9fdb-3debd5008f28> | 2010-05-08 03:12:14 +0000 |
| commit | b5f6d7ca1be6920de8226721ebb3fc2f937854cd (patch) | |
| tree | 960446788703b69f0bb285450be80c5b3d8cc22c /LUFA/Drivers/USB/Class/Device/CDC.h | |
| parent | 1acf6dfebeef8112b7df381b71253cebc75c16f3 (diff) | |
Add svn:eol-style property to source files, so that the line endings are correctly converted to the target system's native end of line style.
git-svn-id: http://lufa-lib.googlecode.com/svn/trunk@1248 d5102386-fcda-11dd-9fdb-3debd5008f28
Diffstat (limited to 'LUFA/Drivers/USB/Class/Device/CDC.h')
| -rw-r--r-- | LUFA/Drivers/USB/Class/Device/CDC.h | 662 |
1 files changed, 331 insertions, 331 deletions
diff --git a/LUFA/Drivers/USB/Class/Device/CDC.h b/LUFA/Drivers/USB/Class/Device/CDC.h index 0b2c4c03..f0351f5d 100644 --- a/LUFA/Drivers/USB/Class/Device/CDC.h +++ b/LUFA/Drivers/USB/Class/Device/CDC.h @@ -1,331 +1,331 @@ -/*
- LUFA Library
- Copyright (C) Dean Camera, 2010.
-
- dean [at] fourwalledcubicle [dot] com
- www.fourwalledcubicle.com
-*/
-
-/*
- 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 Device mode driver for the library USB CDC Class driver.
- *
- * Device 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 class driver
- * dispatch header located in LUFA/Drivers/USB/Class/CDC.h.
- */
-
-/** \ingroup Group_USBClassCDC
- * @defgroup Group_USBClassCDCDevice CDC Class Device 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/Device/CDC.c
- *
- * \section Module Description
- * Device Mode USB Class driver framework interface, for the CDC USB Class driver.
- *
- * \note There are several major drawbacks to the CDC-ACM standard USB class, however
- * it is very standardized and thus usually available as a built-in driver on
- * most platforms, and so is a better choice than a proprietary serial class.
- *
- * One major issue with CDC-ACM is that it requires two Interface descriptors,
- * which will upset most hosts when part of a multi-function "Composite" USB
- * device, as each interface will be loaded into a separate driver instance. To
- * conbat this, you should use the "Interface Association Descriptor" addendum to
- * the USB standard which is available on most OSes when creating Composite devices.
- *
- * Another major oversight is that there is no mechanism for the host to notify the
- * device that there is a data sink on the host side ready to accept data. This
- * means that the device may try to send data while the host isn't listening, causing
- * lengthy blocking timeouts in the transmission routines. To combat this, it is
- * recommended that the virtual serial line DTR (Data Terminal Ready) be used where
- * possible to determine if a host application is ready for data.
- *
- * @{
- */
-
-#ifndef _CDC_CLASS_DEVICE_H_
-#define _CDC_CLASS_DEVICE_H_
-
- /* Includes: */
- #include "../../USB.h"
- #include "../Common/CDC.h"
-
- #include <stdio.h>
- #include <string.h>
-
- /* 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/Class/CDC.h instead.
- #endif
-
- /* Public Interface - May be used in end-application: */
- /* Type Defines: */
- /** \brief CDC Class Device Mode Configuration and State Structure.
- *
- * Class state structure. An instance of this structure should be made for each CDC interface
- * 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 ControlInterfaceNumber; /**< Interface number of the CDC control interface within the device */
-
- uint8_t DataINEndpointNumber; /**< Endpoint number of the CDC interface's IN data endpoint */
- uint16_t DataINEndpointSize; /**< Size in bytes of the CDC interface's IN data endpoint */
- bool DataINEndpointDoubleBank; /** Indicates if the CDC interface's IN data endpoint should use double banking */
-
- uint8_t DataOUTEndpointNumber; /**< Endpoint number of the CDC interface's OUT data endpoint */
- uint16_t DataOUTEndpointSize; /**< Size in bytes of the CDC interface's OUT data endpoint */
- bool DataOUTEndpointDoubleBank; /** Indicates if the CDC interface's OUT data endpoint should use double banking */
-
- uint8_t NotificationEndpointNumber; /**< Endpoint number of the CDC interface's IN notification endpoint, if used */
- uint16_t NotificationEndpointSize; /**< Size in bytes of the CDC interface's IN notification endpoint, if used */
- bool NotificationEndpointDoubleBank; /** Indicates if the CDC interface's notification endpoint should use double banking */
- } Config; /**< Config data for the USB class interface within the device. All elements in this section
- * <b>must</b> be set or the interface will fail to enumerate and operate correctly.
- */
- struct
- {
- struct
- {
- uint8_t HostToDevice; /**< Control line states from the host to device, as a set of CDC_CONTROL_LINE_OUT_*
- * masks. This value is updated each time \ref CDC_Device_USBTask() is called.
- */
- uint8_t DeviceToHost; /**< Control line states from the device to host, as a set of CDC_CONTROL_LINE_IN_*
- * masks - to notify the host of changes to these values, call the
- * \ref CDC_Device_SendControlLineStateChange() function.
- */
- } ControlLineStates; /**< Current states of the virtual serial port's control lines between the device and host. */
-
- 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; /** 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.
- */
- } State; /**< State data for the USB class interface within the device. All elements in this section
- * are reset to their defaults when the interface is enumerated.
- */
- } USB_ClassInfo_CDC_Device_t;
-
- /* Function Prototypes: */
- /** Configures the endpoints of a given CDC interface, ready for use. This should be linked to the library
- * \ref EVENT_USB_Device_ConfigurationChanged() event so that the endpoints are configured when the configuration containing
- * the given CDC interface is selected.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
- *
- * \return Boolean true if the endpoints were successfully configured, false otherwise
- */
- bool CDC_Device_ConfigureEndpoints(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Processes incoming control requests from the host, that are directed to the given CDC class interface. This should be
- * linked to the library \ref EVENT_USB_Device_UnhandledControlRequest() event.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
- */
- void CDC_Device_ProcessControlRequest(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** General management task for a given CDC 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 a CDC Class configuration and state
- */
- void CDC_Device_USBTask(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** CDC class driver event for a line encoding change on a CDC interface. This event fires each time the host requests a
- * line encoding change (containing the serial parity, baud and other configuration information) and may be hooked in the
- * user program by declaring a handler function with the same name and parameters listed here. The new line encoding
- * settings are available in the LineEncoding structure inside the CDC interface structure passed as a parameter.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
- */
- void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** CDC class driver event for a control line state change on a CDC interface. This event fires each time the host requests a
- * control line state change (containing the virtual serial control line states, such as DTR) 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.HostToDevice value inside the CDC interface structure passed as a parameter, set as
- * a mask of CDC_CONTROL_LINE_OUT_* masks.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
- */
- void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** CDC class driver event for a send break request sent to the device from the host. This is generally used to seperate
- * data or to indicate a special condition to the receiving device.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
- * \param[in] Duration Duration of the break that has been sent by the host, in milliseconds
- */
- void EVENT_CDC_Device_BreakSent(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, uint8_t Duration) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Sends a given string to the attached USB host, if connected. If a host is not connected when the function is called, the
- * string is discarded. Bytes will be queued for transmission to the host until either the endpoint bank becomes full, or the
- * \ref CDC_Device_Flush() function is called to flush the pending data to the host. This allows for multiple bytes to be
- * packed into a single endpoint packet, increasing data throughput.
- *
- * \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
- * the call will fail.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
- * \param[in] Data Pointer to the string to send to the host
- * \param[in] Length Size in bytes of the string to send to the host
- *
- * \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum
- */
- uint8_t CDC_Device_SendString(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, 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 host, if connected. If a host is not connected when the function is called, the
- * byte is discarded. Bytes will be queued for transmission to the host until either the endpoint bank becomes full, or the
- * \ref CDC_Device_Flush() function is called to flush the pending data to the host. This allows for multiple bytes to be
- * packed into a single endpoint packet, increasing data throughput.
- *
- * \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
- * the call will fail.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
- * \param[in] Data Byte of data to send to the host
- *
- * \return A value from the \ref Endpoint_WaitUntilReady_ErrorCodes_t enum
- */
- uint8_t CDC_Device_SendByte(USB_ClassInfo_CDC_Device_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 host, waiting to be read.
- *
- * \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
- * the call will fail.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
- *
- * \return Total number of buffered bytes received from the host
- */
- uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** 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
- * returns 0. The \ref CDC_Device_BytesReceived() function should be queried before data is received to ensure that no data
- * underflow occurs.
- *
- * \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
- * the call will fail.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
- *
- * \return Next received byte from the host, or 0 if no data received
- */
- uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Flushes any data waiting to be sent, ensuring that the send buffer is cleared.
- *
- * \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
- * the call will fail.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
- *
- * \return A value from the \ref Endpoint_WaitUntilReady_ErrorCodes_t enum
- */
- uint8_t CDC_Device_Flush(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Sends a Serial Control Line State Change notification to the host. This should be called when the virtual serial
- * control lines (DCD, DSR, etc.) have changed states, or to give BREAK notifications to the host. Line states persist
- * until they are cleared via a second notification. This should be called each time the CDC class driver's
- * ControlLineStates.DeviceToHost value is updated to push the new states to the USB host.
- *
- * \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or
- * the call will fail.
- *
- * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state
- */
- void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
-
- /** Creates a standard characer stream for the given CDC Device instance so that it can be used with all the regular
- * functions in the avr-libc <stdio.h> 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.
- *
- * Reading data from this stream is non-blocking, i.e. in most instances, complete strings cannot be read in by a single
- * fetch, as the endpoint will not be ready at some point in the transmission, aborting the transfer. However, this may
- * be used when the read data is processed byte-per-bye (via getc()) or when the user application will implement its own
- * line buffering.
- *
- * \note The created stream can be given as stdout if desired to direct the standard output from all <stdio.h> 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_Device_CreateStream(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, FILE* Stream);
-
- /** Identical to CDC_Device_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_Device_CreateBlockingStream(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, FILE* Stream);
-
- /* Private Interface - For use in library only: */
- #if !defined(__DOXYGEN__)
- /* Function Prototypes: */
- #if defined(__INCLUDE_FROM_CDC_CLASS_DEVICE_C)
- static int CDC_Device_putchar(char c, FILE* Stream);
- static int CDC_Device_getchar(FILE* Stream);
- static int CDC_Device_getchar_Blocking(FILE* Stream);
-
- void CDC_Device_Event_Stub(void);
- void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
- ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(CDC_Device_Event_Stub);
- void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
- ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(CDC_Device_Event_Stub);
- void EVENT_CDC_Device_BreakSent(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, uint8_t Duration)
- ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(CDC_Device_Event_Stub);
- #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.fourwalledcubicle.com +*/ + +/* + 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 Device mode driver for the library USB CDC Class driver. + * + * Device 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 class driver + * dispatch header located in LUFA/Drivers/USB/Class/CDC.h. + */ + +/** \ingroup Group_USBClassCDC + * @defgroup Group_USBClassCDCDevice CDC Class Device 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/Device/CDC.c + * + * \section Module Description + * Device Mode USB Class driver framework interface, for the CDC USB Class driver. + * + * \note There are several major drawbacks to the CDC-ACM standard USB class, however + * it is very standardized and thus usually available as a built-in driver on + * most platforms, and so is a better choice than a proprietary serial class. + * + * One major issue with CDC-ACM is that it requires two Interface descriptors, + * which will upset most hosts when part of a multi-function "Composite" USB + * device, as each interface will be loaded into a separate driver instance. To + * conbat this, you should use the "Interface Association Descriptor" addendum to + * the USB standard which is available on most OSes when creating Composite devices. + * + * Another major oversight is that there is no mechanism for the host to notify the + * device that there is a data sink on the host side ready to accept data. This + * means that the device may try to send data while the host isn't listening, causing + * lengthy blocking timeouts in the transmission routines. To combat this, it is + * recommended that the virtual serial line DTR (Data Terminal Ready) be used where + * possible to determine if a host application is ready for data. + * + * @{ + */ + +#ifndef _CDC_CLASS_DEVICE_H_ +#define _CDC_CLASS_DEVICE_H_ + + /* Includes: */ + #include "../../USB.h" + #include "../Common/CDC.h" + + #include <stdio.h> + #include <string.h> + + /* 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/Class/CDC.h instead. + #endif + + /* Public Interface - May be used in end-application: */ + /* Type Defines: */ + /** \brief CDC Class Device Mode Configuration and State Structure. + * + * Class state structure. An instance of this structure should be made for each CDC interface + * 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 ControlInterfaceNumber; /**< Interface number of the CDC control interface within the device */ + + uint8_t DataINEndpointNumber; /**< Endpoint number of the CDC interface's IN data endpoint */ + uint16_t DataINEndpointSize; /**< Size in bytes of the CDC interface's IN data endpoint */ + bool DataINEndpointDoubleBank; /** Indicates if the CDC interface's IN data endpoint should use double banking */ + + uint8_t DataOUTEndpointNumber; /**< Endpoint number of the CDC interface's OUT data endpoint */ + uint16_t DataOUTEndpointSize; /**< Size in bytes of the CDC interface's OUT data endpoint */ + bool DataOUTEndpointDoubleBank; /** Indicates if the CDC interface's OUT data endpoint should use double banking */ + + uint8_t NotificationEndpointNumber; /**< Endpoint number of the CDC interface's IN notification endpoint, if used */ + uint16_t NotificationEndpointSize; /**< Size in bytes of the CDC interface's IN notification endpoint, if used */ + bool NotificationEndpointDoubleBank; /** Indicates if the CDC interface's notification endpoint should use double banking */ + } Config; /**< Config data for the USB class interface within the device. All elements in this section + * <b>must</b> be set or the interface will fail to enumerate and operate correctly. + */ + struct + { + struct + { + uint8_t HostToDevice; /**< Control line states from the host to device, as a set of CDC_CONTROL_LINE_OUT_* + * masks. This value is updated each time \ref CDC_Device_USBTask() is called. + */ + uint8_t DeviceToHost; /**< Control line states from the device to host, as a set of CDC_CONTROL_LINE_IN_* + * masks - to notify the host of changes to these values, call the + * \ref CDC_Device_SendControlLineStateChange() function. + */ + } ControlLineStates; /**< Current states of the virtual serial port's control lines between the device and host. */ + + 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; /** 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. + */ + } State; /**< State data for the USB class interface within the device. All elements in this section + * are reset to their defaults when the interface is enumerated. + */ + } USB_ClassInfo_CDC_Device_t; + + /* Function Prototypes: */ + /** Configures the endpoints of a given CDC interface, ready for use. This should be linked to the library + * \ref EVENT_USB_Device_ConfigurationChanged() event so that the endpoints are configured when the configuration containing + * the given CDC interface is selected. + * + * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state + * + * \return Boolean true if the endpoints were successfully configured, false otherwise + */ + bool CDC_Device_ConfigureEndpoints(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); + + /** Processes incoming control requests from the host, that are directed to the given CDC class interface. This should be + * linked to the library \ref EVENT_USB_Device_UnhandledControlRequest() event. + * + * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state + */ + void CDC_Device_ProcessControlRequest(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); + + /** General management task for a given CDC 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 a CDC Class configuration and state + */ + void CDC_Device_USBTask(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); + + /** CDC class driver event for a line encoding change on a CDC interface. This event fires each time the host requests a + * line encoding change (containing the serial parity, baud and other configuration information) and may be hooked in the + * user program by declaring a handler function with the same name and parameters listed here. The new line encoding + * settings are available in the LineEncoding structure inside the CDC interface structure passed as a parameter. + * + * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state + */ + void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); + + /** CDC class driver event for a control line state change on a CDC interface. This event fires each time the host requests a + * control line state change (containing the virtual serial control line states, such as DTR) 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.HostToDevice value inside the CDC interface structure passed as a parameter, set as + * a mask of CDC_CONTROL_LINE_OUT_* masks. + * + * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state + */ + void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); + + /** CDC class driver event for a send break request sent to the device from the host. This is generally used to seperate + * data or to indicate a special condition to the receiving device. + * + * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state + * \param[in] Duration Duration of the break that has been sent by the host, in milliseconds + */ + void EVENT_CDC_Device_BreakSent(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, uint8_t Duration) ATTR_NON_NULL_PTR_ARG(1); + + /** Sends a given string to the attached USB host, if connected. If a host is not connected when the function is called, the + * string is discarded. Bytes will be queued for transmission to the host until either the endpoint bank becomes full, or the + * \ref CDC_Device_Flush() function is called to flush the pending data to the host. This allows for multiple bytes to be + * packed into a single endpoint packet, increasing data throughput. + * + * \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or + * the call will fail. + * + * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state + * \param[in] Data Pointer to the string to send to the host + * \param[in] Length Size in bytes of the string to send to the host + * + * \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum + */ + uint8_t CDC_Device_SendString(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, 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 host, if connected. If a host is not connected when the function is called, the + * byte is discarded. Bytes will be queued for transmission to the host until either the endpoint bank becomes full, or the + * \ref CDC_Device_Flush() function is called to flush the pending data to the host. This allows for multiple bytes to be + * packed into a single endpoint packet, increasing data throughput. + * + * \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or + * the call will fail. + * + * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state + * \param[in] Data Byte of data to send to the host + * + * \return A value from the \ref Endpoint_WaitUntilReady_ErrorCodes_t enum + */ + uint8_t CDC_Device_SendByte(USB_ClassInfo_CDC_Device_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 host, waiting to be read. + * + * \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or + * the call will fail. + * + * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state + * + * \return Total number of buffered bytes received from the host + */ + uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); + + /** 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 + * returns 0. The \ref CDC_Device_BytesReceived() function should be queried before data is received to ensure that no data + * underflow occurs. + * + * \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or + * the call will fail. + * + * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state + * + * \return Next received byte from the host, or 0 if no data received + */ + uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); + + /** Flushes any data waiting to be sent, ensuring that the send buffer is cleared. + * + * \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or + * the call will fail. + * + * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state + * + * \return A value from the \ref Endpoint_WaitUntilReady_ErrorCodes_t enum + */ + uint8_t CDC_Device_Flush(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); + + /** Sends a Serial Control Line State Change notification to the host. This should be called when the virtual serial + * control lines (DCD, DSR, etc.) have changed states, or to give BREAK notifications to the host. Line states persist + * until they are cleared via a second notification. This should be called each time the CDC class driver's + * ControlLineStates.DeviceToHost value is updated to push the new states to the USB host. + * + * \note This function must only be called when the Device state machine is in the DEVICE_STATE_Configured state or + * the call will fail. + * + * \param[in,out] CDCInterfaceInfo Pointer to a structure containing a CDC Class configuration and state + */ + void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); + + /** Creates a standard characer stream for the given CDC Device instance so that it can be used with all the regular + * functions in the avr-libc <stdio.h> 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. + * + * Reading data from this stream is non-blocking, i.e. in most instances, complete strings cannot be read in by a single + * fetch, as the endpoint will not be ready at some point in the transmission, aborting the transfer. However, this may + * be used when the read data is processed byte-per-bye (via getc()) or when the user application will implement its own + * line buffering. + * + * \note The created stream can be given as stdout if desired to direct the standard output from all <stdio.h> 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_Device_CreateStream(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, FILE* Stream); + + /** Identical to CDC_Device_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_Device_CreateBlockingStream(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo, FILE* Stream); + + /* Private Interface - For use in library only: */ + #if !defined(__DOXYGEN__) + /* Function Prototypes: */ + #if defined(__INCLUDE_FROM_CDC_CLASS_DEVICE_C) + static int CDC_Device_putchar(char c, FILE* Stream); + static int CDC_Device_getchar(FILE* Stream); + static int CDC_Device_getchar_Blocking(FILE* Stream); + + void CDC_Device_Event_Stub(void); + void EVENT_CDC_Device_LineEncodingChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) + ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(CDC_Device_Event_Stub); + void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo) + ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(CDC_Device_Event_Stub); + void EVENT_CDC_Device_BreakSent(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, uint8_t Duration) + ATTR_WEAK ATTR_NON_NULL_PTR_ARG(1) ATTR_ALIAS(CDC_Device_Event_Stub); + #endif + + #endif + + /* Disable C linkage for C++ Compilers: */ + #if defined(__cplusplus) + } + #endif + +#endif + +/** @} */ |
