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Diffstat (limited to 'lib/lufa/LUFA/Drivers/USB/Class/Host/CDCClassHost.h')
| -rw-r--r-- | lib/lufa/LUFA/Drivers/USB/Class/Host/CDCClassHost.h | 385 |
1 files changed, 385 insertions, 0 deletions
diff --git a/lib/lufa/LUFA/Drivers/USB/Class/Host/CDCClassHost.h b/lib/lufa/LUFA/Drivers/USB/Class/Host/CDCClassHost.h new file mode 100644 index 0000000000..86ce6def38 --- /dev/null +++ b/lib/lufa/LUFA/Drivers/USB/Class/Host/CDCClassHost.h @@ -0,0 +1,385 @@ +/* + LUFA Library + Copyright (C) Dean Camera, 2017. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2017 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 disclaims 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_USBClassCDCHost_Dependencies Module Source Dependencies + * The following files must be built with any user project that uses this module: + * - LUFA/Drivers/USB/Class/Host/CDCClassHost.c <i>(Makefile source module name: LUFA_SRC_USBCLASS)</i> + * + * \section Sec_USBClassCDCHost_ModDescription 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/CDCClassCommon.h" + + #include <stdio.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/USB.h instead. + #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 \c CDCInterfaceInfo parameter. This + * stores each CDC interface's configuration and state information. + */ + typedef struct + { + struct + { + USB_Pipe_Table_t DataINPipe; /**< Data IN Pipe configuration table. */ + USB_Pipe_Table_t DataOUTPipe; /**< Data OUT Pipe configuration table. */ + USB_Pipe_Table_t NotificationPipe; /**< Notification IN Pipe configuration table. */ + } 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 + { + 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. */ + + struct + { + uint16_t HostToDevice; /**< Control line states from the host to device, as a set of \c CDC_CONTROL_LINE_OUT_* + * masks - to notify the device of changes to these values, call the + * \ref CDC_Host_SendControlLineStateChange() function. + */ + uint16_t DeviceToHost; /**< Control line states from the device to host, as a set of \c 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 + * <b>may</b> 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. */ + CDC_ENUMERROR_PipeConfigurationFailed = 3, /**< One or more pipes for the specified interface could not be configured correctly. */ + }; + + /* 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. + * + * \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] ConfigDescriptorData 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* ConfigDescriptorData) 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 \c 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 \c 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 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 data buffer to the attached USB device, if connected. If a device is not connected when the function is + * called, the data will be 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 device. 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] Buffer Pointer to a buffer containing the data to send to the device. + * \param[in] Length Length of the data to send to the device. + * + * \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum. + */ + uint8_t CDC_Host_SendData(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo, + const void* const Buffer, + const uint16_t Length) ATTR_NON_NULL_PTR_ARG(1); + + /** Sends a given data buffer from PROGMEM space 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 host until either the pipe + * bank becomes full, or the \ref CDC_Host_Flush() function is called to flush the pending data to the device. 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] Buffer Pointer to a buffer containing the data to send to the device. + * \param[in] Length Length of the data to send to the host. + * + * \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum. + */ + uint8_t CDC_Host_SendData_P(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo, + const void* const Buffer, + const uint16_t Length) ATTR_NON_NULL_PTR_ARG(1); + + /** Sends a given null-terminated 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 device. 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] String Pointer to the null terminated 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 String) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2); + + /** Sends a given null terminated string from PROGMEM space 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 device. 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] String Pointer to the null terminated string to send to the host. + * + * \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum. + */ + uint8_t CDC_Host_SendString_P(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo, + const char* const String) 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); + + #if defined(FDEV_SETUP_STREAM) || defined(__DOXYGEN__) + /** Creates a standard character stream for the given CDC Device instance so that it can be used with all the regular + * functions in the standard \c <stdio.h> library that accept a \c FILE stream as a destination (e.g. \c 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 \c getc()) or when the user application will implement its own + * line buffering. + * + * \note The created stream can be given as \c stdout if desired to direct the standard output from all \c <stdio.h> functions + * to the given CDC interface. + * \n\n + * + * \note This function is not available on all microcontroller architectures. + * + * \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) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2); + + /** Identical to \ref 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. + * + * \note This function is not available on all microcontroller architectures. + * + * \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) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2); + #endif + + /** 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 \c ControlLineStates.DeviceToHost value inside the CDC host interface structure passed as a parameter, set as + * a mask of \c 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) + #if defined(FDEV_SETUP_STREAM) + 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); + #endif + + void CDC_Host_Event_Stub(void) ATTR_CONST; + + 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_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1); + static uint8_t DCOMP_CDC_Host_NextCDCDataInterface(void* const CurrentDescriptor) + ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1); + static uint8_t DCOMP_CDC_Host_NextCDCInterfaceEndpoint(void* const CurrentDescriptor) + ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1); + #endif + #endif + + /* Disable C linkage for C++ Compilers: */ + #if defined(__cplusplus) + } + #endif + +#endif + +/** @} */ + |