2012-05-26 02:20:38 +00:00
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/*
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LUFA Library
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Copyright (C) Dean Camera, 2012.
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dean [at] fourwalledcubicle [dot] com
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www.lufa-lib.org
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*/
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/*
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Copyright 2012 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/** \file
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* \brief USB Event management definitions.
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* \copydetails Group_Events
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*
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* \note This file should not be included directly. It is automatically included as needed by the USB driver
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* dispatch header located in LUFA/Drivers/USB/USB.h.
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*/
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/** \ingroup Group_USB
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* \defgroup Group_Events USB Events
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* \brief USB Event management definitions.
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*
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* This module contains macros and functions relating to the management of library events, which are small
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* pieces of code similar to ISRs which are run when a given condition is met. Each event can be fired from
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* multiple places in the user or library code, which may or may not be inside an ISR, thus each handler
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* should be written to be as small and fast as possible to prevent possible problems.
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*
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* Events can be hooked by the user application by declaring a handler function with the same name and parameters
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* listed here. If an event with no user-associated handler is fired within the library, it by default maps to an
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* internal empty stub function.
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*
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* Each event must only have one associated event handler, but can be raised by multiple sources by calling the
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* event handler function (with any required event parameters).
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*
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* @{
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*/
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#ifndef __USBEVENTS_H__
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#define __USBEVENTS_H__
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/* Includes: */
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#include "../../../Common/Common.h"
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#include "USBMode.h"
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/* Enable C linkage for C++ Compilers: */
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/* Preprocessor Checks: */
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#if !defined(__INCLUDE_FROM_USB_DRIVER)
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#error Do not include this file directly. Include LUFA/Drivers/USB/USB.h instead.
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#endif
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/* Public Interface - May be used in end-application: */
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/* Pseudo-Functions for Doxygen: */
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#if !defined(__INCLUDE_FROM_EVENTS_C) || defined(__DOXYGEN__)
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/** Event for USB mode pin level change. This event fires when the USB interface is set to dual role
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* mode, and the UID pin level has changed to indicate a new mode (device or host). This event fires
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* before the mode is switched to the newly indicated mode but after the \ref EVENT_USB_Device_Disconnect
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* event has fired (if disconnected before the role change).
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*
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* \note This event only exists on microcontrollers that support dual role USB modes.
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* \n\n
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*
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* \note This event does not exist if the \c USB_DEVICE_ONLY or \c USB_HOST_ONLY tokens have been supplied
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* to the compiler (see \ref Group_USBManagement documentation).
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*/
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void EVENT_USB_UIDChange(void);
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/** Event for USB host error. This event fires when a hardware fault has occurred whilst the USB
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* interface is in host mode.
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*
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* \param[in] ErrorCode Error code indicating the failure reason, a value in \ref USB_Host_ErrorCodes_t.
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*
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* \note This event only exists on microcontrollers that supports USB host mode.
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* \n\n
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*
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* \note This event does not exist if the \c USB_DEVICE_ONLY token is supplied to the compiler (see
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* \ref Group_USBManagement documentation).
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*/
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void EVENT_USB_Host_HostError(const uint8_t ErrorCode);
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/** Event for USB device attachment. This event fires when a the USB interface is in host mode, and
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* a USB device has been connected to the USB interface. This is interrupt driven, thus fires before
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* the standard \ref EVENT_USB_Device_Connect() event and so can be used to programmatically start the USB
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* management task to reduce CPU consumption.
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*
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* \note This event only exists on microcontrollers that supports USB host mode.
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* \n\n
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*
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* \note This event does not exist if the \c USB_DEVICE_ONLY token is supplied to the compiler (see
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* \ref Group_USBManagement documentation).
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*
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* \see \ref USB_USBTask() for more information on the USB management task and reducing CPU usage.
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*/
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void EVENT_USB_Host_DeviceAttached(void);
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/** Event for USB device removal. This event fires when a the USB interface is in host mode, and
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* a USB device has been removed the USB interface whether or not it has been enumerated. This
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* can be used to programmatically stop the USB management task to reduce CPU consumption.
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*
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* \note This event only exists on microcontrollers that supports USB host mode.
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* \n\n
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*
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* \note This event does not exist if the \c USB_DEVICE_ONLY token is supplied to the compiler (see
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* \ref Group_USBManagement documentation).
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*
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* \see \ref USB_USBTask() for more information on the USB management task and reducing CPU usage.
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*/
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void EVENT_USB_Host_DeviceUnattached(void);
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/** Event for USB device enumeration failure. This event fires when a the USB interface is
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* in host mode, and an attached USB device has failed to enumerate completely.
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*
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* \param[in] ErrorCode Error code indicating the failure reason, a value in
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* \ref USB_Host_EnumerationErrorCodes_t.
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*
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* \param[in] SubErrorCode Sub error code indicating the reason for failure - for example, if the
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* ErrorCode parameter indicates a control error, this will give the error
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* code returned by the \ref USB_Host_SendControlRequest() function.
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*
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* \note This event only exists on microcontrollers that supports USB host mode.
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* \n\n
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*
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* \note This event does not exist if the \c USB_DEVICE_ONLY token is supplied to the compiler (see
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* \ref Group_USBManagement documentation).
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*/
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void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
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const uint8_t SubErrorCode);
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/** Event for USB device enumeration completion. This event fires when a the USB interface is
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* in host mode and an attached USB device has been completely enumerated and is ready to be
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* controlled by the user application.
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*
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* This event is time-critical; exceeding OS-specific delays within this event handler (typically of around
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* 1 second) when a transaction is waiting to be processed by the device will prevent break communications
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* and cause the host to reset the USB bus.
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*/
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void EVENT_USB_Host_DeviceEnumerationComplete(void);
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/** Event for USB Start Of Frame detection, when enabled. This event fires at the start of each USB
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* frame, once per millisecond, and is synchronized to the USB bus. This can be used as an accurate
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* millisecond timer source when the USB bus is not suspended while in host mode.
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*
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* This event is time-critical; it is run once per millisecond and thus long handlers will significantly
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* degrade device performance. This event should only be enabled when needed to reduce device wake-ups.
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*
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* \note This event is not normally active - it must be manually enabled and disabled via the
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* \ref USB_Host_EnableSOFEvents() and \ref USB_Host_DisableSOFEvents() commands after enumeration of
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* a USB device.
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* \n\n
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*
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* \note This event does not exist if the \c USB_DEVICE_ONLY token is supplied to the compiler (see
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* \ref Group_USBManagement documentation).
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*/
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void EVENT_USB_Host_StartOfFrame(void);
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/** Event for USB device connection. This event fires when the microcontroller is in USB Device mode
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* and the device is connected to a USB host, beginning the enumeration process measured by a rising
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* level on the microcontroller's VBUS sense pin.
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*
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* This event is time-critical; exceeding OS-specific delays within this event handler (typically of around
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* two seconds) will prevent the device from enumerating correctly.
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*
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* \note For the microcontrollers with limited USB controller functionality, VBUS sensing is not available.
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* this means that the current connection state is derived from the bus suspension and wake up events by default,
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* which is not always accurate (host may suspend the bus while still connected). If the actual connection state
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* needs to be determined, VBUS should be routed to an external pin, and the auto-detect behaviour turned off by
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* passing the \c NO_LIMITED_CONTROLLER_CONNECT token to the compiler via the -D switch at compile time. The connection
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* and disconnection events may be manually fired, and the \ref USB_DeviceState global changed manually.
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* \n\n
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*
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* \note This event may fire multiple times during device enumeration on the microcontrollers with limited USB controllers
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* if \c NO_LIMITED_CONTROLLER_CONNECT is not defined.
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*
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* \see \ref Group_USBManagement for more information on the USB management task and reducing CPU usage.
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*/
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void EVENT_USB_Device_Connect(void);
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/** Event for USB device disconnection. This event fires when the microcontroller is in USB Device mode and the device is
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* disconnected from a host, measured by a falling level on the microcontroller's VBUS sense pin.
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*
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* \note For the microcontrollers with limited USB controllers, VBUS sense is not available to the USB controller.
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* this means that the current connection state is derived from the bus suspension and wake up events by default,
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* which is not always accurate (host may suspend the bus while still connected). If the actual connection state
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* needs to be determined, VBUS should be routed to an external pin, and the auto-detect behaviour turned off by
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* passing the \c NO_LIMITED_CONTROLLER_CONNECT token to the compiler via the -D switch at compile time. The connection
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* and disconnection events may be manually fired, and the \ref USB_DeviceState global changed manually.
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* \n\n
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*
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* \note This event may fire multiple times during device enumeration on the microcontrollers with limited USB controllers
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* if \c NO_LIMITED_CONTROLLER_CONNECT is not defined.
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*
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* \see \ref Group_USBManagement for more information on the USB management task and reducing CPU usage.
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*/
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void EVENT_USB_Device_Disconnect(void);
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/** Event for control requests. This event fires when a the USB host issues a control request
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* to the mandatory device control endpoint (of address 0). This may either be a standard
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* request that the library may have a handler code for internally, or a class specific request
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* issued to the device which must be handled appropriately. If a request is not processed in the
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* user application via this event, it will be passed to the library for processing internally
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* if a suitable handler exists.
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*
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* This event is time-critical; each packet within the request transaction must be acknowledged or
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* sent within 50ms or the host will abort the transfer.
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*
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* The library internally handles all standard control requests with the exceptions of SYNC FRAME,
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* SET DESCRIPTOR and SET INTERFACE. These and all other non-standard control requests will be left
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* for the user to process via this event if desired. If not handled in the user application or by
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* the library internally, unknown requests are automatically STALLed.
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*
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* \note This event does not exist if the \c USB_HOST_ONLY token is supplied to the compiler (see
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* \ref Group_USBManagement documentation).
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* \n\n
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*
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* \note Requests should be handled in the same manner as described in the USB 2.0 Specification,
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* or appropriate class specification. In all instances, the library has already read the
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* request SETUP parameters into the \ref USB_ControlRequest structure which should then be used
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* by the application to determine how to handle the issued request.
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*/
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void EVENT_USB_Device_ControlRequest(void);
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/** Event for USB configuration number changed. This event fires when a the USB host changes the
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* selected configuration number while in device mode. This event should be hooked in device
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* applications to create the endpoints and configure the device for the selected configuration.
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*
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* This event is time-critical; exceeding OS-specific delays within this event handler (typically of around
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* one second) will prevent the device from enumerating correctly.
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*
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* This event fires after the value of \ref USB_Device_ConfigurationNumber has been changed.
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*
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* \note This event does not exist if the \c USB_HOST_ONLY token is supplied to the compiler (see
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* \ref Group_USBManagement documentation).
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*/
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void EVENT_USB_Device_ConfigurationChanged(void);
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/** Event for USB suspend. This event fires when a the USB host suspends the device by halting its
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* transmission of Start Of Frame pulses to the device. This is generally hooked in order to move
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* the device over to a low power state until the host wakes up the device. If the USB interface is
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* enumerated with the \ref USB_OPT_AUTO_PLL option set, the library will automatically suspend the
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* USB PLL before the event is fired to save power.
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*
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* \note This event does not exist if the \c USB_HOST_ONLY token is supplied to the compiler (see
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* \ref Group_USBManagement documentation).
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* \n\n
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*
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* \note This event does not exist on the microcontrollers with limited USB VBUS sensing abilities
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* when the \c NO_LIMITED_CONTROLLER_CONNECT compile time token is not set - see
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* \ref EVENT_USB_Device_Disconnect.
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*
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* \see \ref EVENT_USB_Device_WakeUp() event for accompanying Wake Up event.
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*/
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void EVENT_USB_Device_Suspend(void);
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/** Event for USB wake up. This event fires when a the USB interface is suspended while in device
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* mode, and the host wakes up the device by supplying Start Of Frame pulses. This is generally
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* hooked to pull the user application out of a low power state and back into normal operating
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* mode. If the USB interface is enumerated with the \ref USB_OPT_AUTO_PLL option set, the library
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* will automatically restart the USB PLL before the event is fired.
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*
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* \note This event does not exist if the \c USB_HOST_ONLY token is supplied to the compiler (see
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* \ref Group_USBManagement documentation).
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* \n\n
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*
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* \note This event does not exist on the microcontrollers with limited USB VBUS sensing abilities
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* when the \c NO_LIMITED_CONTROLLER_CONNECT compile time token is not set - see
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* \ref EVENT_USB_Device_Disconnect.
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*
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* \see \ref EVENT_USB_Device_Suspend() event for accompanying Suspend event.
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*/
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void EVENT_USB_Device_WakeUp(void);
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/** Event for USB interface reset. This event fires when the USB interface is in device mode, and
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* a the USB host requests that the device reset its interface. This event fires after the control
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* endpoint has been automatically configured by the library.
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*
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* This event is time-critical; exceeding OS-specific delays within this event handler (typically of around
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* two seconds) will prevent the device from enumerating correctly.
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*
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* \note This event does not exist if the \c USB_HOST_ONLY token is supplied to the compiler (see
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* \ref Group_USBManagement documentation).
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*/
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void EVENT_USB_Device_Reset(void);
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/** Event for USB Start Of Frame detection, when enabled. This event fires at the start of each USB
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* frame, once per millisecond, and is synchronized to the USB bus. This can be used as an accurate
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* millisecond timer source when the USB bus is enumerated in device mode to a USB host.
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*
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* This event is time-critical; it is run once per millisecond and thus long handlers will significantly
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* degrade device performance. This event should only be enabled when needed to reduce device wake-ups.
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*
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* \pre This event is not normally active - it must be manually enabled and disabled via the
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* \ref USB_Device_EnableSOFEvents() and \ref USB_Device_DisableSOFEvents() commands after enumeration.
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* \n\n
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*
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* \note This event does not exist if the \c USB_HOST_ONLY token is supplied to the compiler (see
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* \ref Group_USBManagement documentation).
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*/
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void EVENT_USB_Device_StartOfFrame(void);
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#endif
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/* Private Interface - For use in library only: */
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#if !defined(__DOXYGEN__)
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/* Function Prototypes: */
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#if defined(__INCLUDE_FROM_EVENTS_C)
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void USB_Event_Stub(void) ATTR_CONST;
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#if defined(USB_CAN_BE_BOTH)
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void EVENT_USB_UIDChange(void) ATTR_WEAK ATTR_ALIAS(USB_Event_Stub);
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#endif
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#if defined(USB_CAN_BE_HOST)
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void EVENT_USB_Host_HostError(const uint8_t ErrorCode) ATTR_WEAK ATTR_ALIAS(USB_Event_Stub);
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void EVENT_USB_Host_DeviceAttached(void) ATTR_WEAK ATTR_ALIAS(USB_Event_Stub);
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void EVENT_USB_Host_DeviceUnattached(void) ATTR_WEAK ATTR_ALIAS(USB_Event_Stub);
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void EVENT_USB_Host_DeviceEnumerationComplete(void) ATTR_WEAK ATTR_ALIAS(USB_Event_Stub);
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void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode,
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const uint8_t SubErrorCode)
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ATTR_WEAK ATTR_ALIAS(USB_Event_Stub);
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void EVENT_USB_Host_StartOfFrame(void) ATTR_WEAK ATTR_ALIAS(USB_Event_Stub);
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#endif
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#if defined(USB_CAN_BE_DEVICE)
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void EVENT_USB_Device_Connect(void) ATTR_WEAK ATTR_ALIAS(USB_Event_Stub);
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void EVENT_USB_Device_Disconnect(void) ATTR_WEAK ATTR_ALIAS(USB_Event_Stub);
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void EVENT_USB_Device_ControlRequest(void) ATTR_WEAK ATTR_ALIAS(USB_Event_Stub);
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void EVENT_USB_Device_ConfigurationChanged(void) ATTR_WEAK ATTR_ALIAS(USB_Event_Stub);
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void EVENT_USB_Device_Suspend(void) ATTR_WEAK ATTR_ALIAS(USB_Event_Stub);
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void EVENT_USB_Device_WakeUp(void) ATTR_WEAK ATTR_ALIAS(USB_Event_Stub);
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void EVENT_USB_Device_Reset(void) ATTR_WEAK ATTR_ALIAS(USB_Event_Stub);
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void EVENT_USB_Device_StartOfFrame(void) ATTR_WEAK ATTR_ALIAS(USB_Event_Stub);
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#endif
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#endif
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#endif
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/* Disable C linkage for C++ Compilers: */
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|
#if defined(__cplusplus)
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}
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#endif
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#endif
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/** @} */
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