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author | Jack Humbert <jack.humb@gmail.com> | 2017-07-07 17:55:23 +0200 |
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committer | Jack Humbert <jack.humb@gmail.com> | 2017-07-07 17:55:23 +0200 |
commit | 60b30c036397cb5627fa374bb930794b225daa29 (patch) | |
tree | e156c2d6b27f01db6985f2cc560c9c345d48fdac /LUFA/Drivers/USB/Class/Device/CDCClassDevice.h | |
download | qmk_firmware-60b30c036397cb5627fa374bb930794b225daa29.tar.gz qmk_firmware-60b30c036397cb5627fa374bb930794b225daa29.tar.xz |
Squashed 'lib/lufa/' content from commit 385d40300
git-subtree-dir: lib/lufa
git-subtree-split: 385d4030035dbaf41591309dbde47653bd03841b
Diffstat (limited to 'LUFA/Drivers/USB/Class/Device/CDCClassDevice.h')
-rw-r--r-- | LUFA/Drivers/USB/Class/Device/CDCClassDevice.h | 386 |
1 files changed, 386 insertions, 0 deletions
diff --git a/LUFA/Drivers/USB/Class/Device/CDCClassDevice.h b/LUFA/Drivers/USB/Class/Device/CDCClassDevice.h new file mode 100644 index 000000000..9d5c4e5a0 --- /dev/null +++ b/LUFA/Drivers/USB/Class/Device/CDCClassDevice.h @@ -0,0 +1,386 @@ +/* + 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 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 USB module driver + * dispatch header located in LUFA/Drivers/USB.h. + */ + +/** \ingroup Group_USBClassCDC + * \defgroup Group_USBClassCDCDevice CDC Class Device Mode Driver + * + * \section Sec_USBClassCDCDevice_Dependencies Module Source Dependencies + * The following files must be built with any user project that uses this module: + * - LUFA/Drivers/USB/Class/Device/CDCClassDevice.c <i>(Makefile source module name: LUFA_SRC_USBCLASS)</i> + * + * \section Sec_USBClassCDCDevice_ModDescription 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. This is because each interface will be loaded into a separate driver + * instance, causing the two interfaces be become unlinked. To prevent this, you + * should use the "Interface Association Descriptor" addendum to the USB 2.0 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. It is thus highly recommended + * that the virtual serial line DTR (Data Terminal Ready) signal 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/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 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 + { + struct + { + uint8_t ControlInterfaceNumber; /**< Interface number of the CDC control interface within the device. */ + + USB_Endpoint_Table_t DataINEndpoint; /**< Data IN endpoint configuration table. */ + USB_Endpoint_Table_t DataOUTEndpoint; /**< Data OUT endpoint configuration table. */ + USB_Endpoint_Table_t NotificationEndpoint; /**< Notification IN Endpoint 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 + { + struct + { + uint16_t HostToDevice; /**< Control line states from the host to device, as a set of \c CDC_CONTROL_LINE_OUT_* + * masks. This value is updated each time \ref CDC_Device_USBTask() is called. + */ + uint16_t DeviceToHost; /**< Control line states from the device to host, as a set of \c 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. */ + + 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. + */ + } 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 \c true if the endpoints were successfully configured, \c 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_ControlRequest() 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 \c 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 \c ControlLineStates.HostToDevice value inside the CDC interface structure passed as a parameter, set as + * a mask of \c 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 separate + * 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, + const uint8_t Duration) ATTR_NON_NULL_PTR_ARG(1); + + /** Sends a given data buffer 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. + * + * \pre This function must only be called when the Device state machine is in the \ref 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] 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 Endpoint_Stream_RW_ErrorCodes_t enum. + */ + uint8_t CDC_Device_SendData(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, + const void* const Buffer, + const uint16_t Length) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2); + + /** Sends a given data buffer from PROGMEM space 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. + * + * \pre This function must only be called when the Device state machine is in the \ref 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] 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 Endpoint_Stream_RW_ErrorCodes_t enum. + */ + uint8_t CDC_Device_SendData_P(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, + const void* const Buffer, + const uint16_t Length) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2); + + /** Sends a given null terminated 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. + * + * \pre This function must only be called when the Device state machine is in the \ref 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] String Pointer to the null terminated 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, + 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 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. + * + * \pre This function must only be called when the Device state machine is in the \ref 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] String Pointer to the null terminated string to send to the host. + * + * \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum. + */ + uint8_t CDC_Device_SendString_P(USB_ClassInfo_CDC_Device_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 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. + * + * \pre This function must only be called when the Device state machine is in the \ref 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. This indicates the number + * of bytes in the OUT endpoint bank only, and thus the number of calls to \ref CDC_Device_ReceiveByte() which are guaranteed to + * succeed immediately. If multiple bytes are to be received, they should be buffered by the user application, as the endpoint + * bank will not be released back to the USB controller until all bytes are read. + * + * \pre This function must only be called when the Device state machine is in the \ref 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 a negative value. The \ref CDC_Device_BytesReceived() function may be queried in advance to determine how many + * bytes are currently buffered in the CDC interface's data receive endpoint bank, and thus how many repeated calls to this + * function which are guaranteed to succeed. + * + * \pre This function must only be called when the Device state machine is in the \ref 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 a negative value if no data received. + */ + int16_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. + * + * \pre This function must only be called when the Device state machine is in the \ref 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 + * \c ControlLineStates.DeviceToHost value is updated to push the new states to the USB host. + * + * \pre This function must only be called when the Device state machine is in the \ref 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); + + #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 <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_Device_CreateStream(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, + FILE* const Stream) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2); + + /** Identical to \ref 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. + * + * \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_Device_CreateBlockingStream(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo, + FILE* const Stream) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2); + #endif + + /* Private Interface - For use in library only: */ + #if !defined(__DOXYGEN__) + /* Function Prototypes: */ + #if defined(__INCLUDE_FROM_CDC_DEVICE_C) + #if defined(FDEV_SETUP_STREAM) + static int CDC_Device_putchar(char c, + FILE* Stream) ATTR_NON_NULL_PTR_ARG(2); + static int CDC_Device_getchar(FILE* Stream) ATTR_NON_NULL_PTR_ARG(1); + static int CDC_Device_getchar_Blocking(FILE* Stream) ATTR_NON_NULL_PTR_ARG(1); + #endif + + void CDC_Device_Event_Stub(void) ATTR_CONST; + + 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, + const 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 + +/** @} */ + |