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441 lines
20 KiB
441 lines
20 KiB
16 years ago
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/*
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LUFA Library
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Copyright (C) Dean Camera, 2009.
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dean [at] fourwalledcubicle [dot] com
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www.fourwalledcubicle.com
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*/
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/*
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Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, and distribute this software
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and its documentation for any purpose and without fee is hereby
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granted, provided that the above copyright notice appear in all
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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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/** Library events module. This module contains macros and functions relating to the management of library
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* events, which are small pieces of code similar to ISRs which are run when a given condition is met. Each
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* event can be fired from multiple places in the user or library code, which may or may not be inside an ISR,
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* thus each handler 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 using the EVENT_HANDLER() and HANDLES_EVENT() macros. If an
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* event with no associated handler is fired within the library, it by default fires an internal empty stub
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* function. This is achieved through the use of the GCC compiler's "alias" attribute.
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*
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* Each event must only have one associated event handler, but can be raised by multiple sources.
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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 <avr/io.h>
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#include "../../../Common/Common.h"
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#include "../LowLevel/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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/* Public Interface - May be used in end-application: */
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/* Macros: */
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/** Raises a given event name, with the specified parameters. For events with no parameters the
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* only argument to the macro is the event name, events with parameters list the parameter values
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* after the name as a comma seperated list.
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*
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* When a given event is fired, its corresponding event handler code is executed.
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*
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* Usage Examples:
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* \code
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* // Raise the USB_VBUSChange event, which takes no parameters
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* RAISE_EVENT(USB_VBUSChange);
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*
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* // Raise the USB_UnhandledControlPacket event which takes two parameters
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* RAISE_EVENT(USB_UnhandledControlPacket, 0, 1);
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* \endcode
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*
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* \see RAISES_EVENT()
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*/
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#define RAISE_EVENT(e, ...) Event_ ## e (__VA_ARGS__)
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/** Indicates that a given module can raise a given event. This is the equivelent of putting the
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* event function's prototype into the module, but in a cleaner way. Each event which may be
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* fired via the RAISE_EVENT macro in the module should have an accompanying RAISES_EVENT
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* prototype in the module's header file.
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*
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* Usage Examples:
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* \code
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* // Module can raise the USB_VBUSChange event
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* RAISES_EVENT(USB_VBUSChange);
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*
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* // ...
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* // Inside a block of code in a function of the module, raise the USB_VBUSChange event
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* RAISE_EVENT(USB_VBUSChange);
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* \endcode
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*
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* \see RAISE_EVENT()
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*/
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#define RAISES_EVENT(e) HANDLES_EVENT(e)
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/** Defines an event handler for the given event. Event handlers should be short in length, as they
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* may be raised from inside an ISR. The user application can react to each event as it sees fit,
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* such as logging the event, indicating the change to the user or performing some other action.
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*
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* Only one event handler may be defined in any user project for each individual event. Events may
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* or may not have parameters - for each event, refer to its documentation elsewhere in this module
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* to determine the presense and purpose of any event parameters.
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*
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* Usage Example:
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* \code
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* // Create an event handler for the USB_VBUSChange event
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* EVENT_HANDLER(USB_VBUSChange)
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* {
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* // Code to execute when the VBUS level changes
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* }
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* \endcode
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*
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* \see HANDLES_EVENT()
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*/
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#define EVENT_HANDLER(e) void Event_ ## e e ## _P
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/** Indicates that a given module handles an event. This is the equivelent of putting the
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* event function's prototype into the module, but in a cleaner way. Each event which may be
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* handled via the EVENT_HANDLER macro in the module should have an accompanying HANDLES_EVENT
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* prototype in the module's header file.
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*
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* Usage Examples:
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* \code
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* // Module handles the USB_VBUSChange event
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* HANDLES_EVENT(USB_VBUSChange);
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*
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* // Create the USB_VBUSChange event handler
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* EVENT_HANDLER(USB_VBUSChange)
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* {
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* // Event handler code here
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* }
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* \endcode
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*
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* \see EVENT_HANDLER()
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*/
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#define HANDLES_EVENT(e) EVENT_HANDLER(e)
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/* Psudo-Functions for Doxygen: */
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#if defined(__DOXYGEN__)
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/** Event for VBUS level change. This event fires when the VBUS line of the USB AVR changes from
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* high to low or vice-versa.
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*
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* \note This event is only available on USB AVR models which support VBUS notification interrupts.
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*/
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void USB_VBUSChange(void);
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/** Event for VBUS attachment. This event fires when the VBUS line of the USB AVR changes from
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* low to high, signalling the attachment of the USB device to a host, before the enumeration
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* process has begun.
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*
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* \note This event is only available on USB AVR models which support VBUS notification interrupts.
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*/
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void USB_VBUSConnect(void);
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/** Event for VBUS detachment. This event fires when the VBUS line of the USB AVR changes from
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* high to low, signalling the USB device has been removed from a host whether it has been enumerated
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* or not.
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*
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* \note This event is only available on USB AVR models which support VBUS notification interrupts.
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*/
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void USB_VBUSDisconnect(void);
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/** Event for USB device connection. This event fires when the AVR is in USB host mode and a device
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* has been attached (but not yet fully enumerated), or when in device mode and the device is connected
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* to a host, beginning the enumeration process.
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*
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* When in device mode, this can be used to progmatically start the USB management task to reduce
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* CPU usage.
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*
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* \note For the smaller USB AVRs (AT90USBXX2) with limited USB controllers, VBUS 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 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 by RAISE_EVENT(), and the USB_IsConnected global changed manually.
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*
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* \see USBTask.h for more information on the USB management task and reducing CPU usage.
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*/
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void USB_Connect(void);
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/** Event for USB device disconnection. This event fires when the AVR is in USB host mode and an
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* attached and enumerated device has been disconnected, or when in device mode and the device is
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* disconnected from the host.
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*
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* When in device mode, this can be used to progmatically stop the USB management task to reduce
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* CPU usage.
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*
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* \note For the smaller USB AVRs (AT90USBXX2) with limited USB controllers, VBUS 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 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 by RAISE_EVENT(), and the USB_IsConnected global changed manually.
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*
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* \see USBTask.h for more information on the USB management task and reducing CPU usage.
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*/
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void USB_Disconnect(void);
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/** Event for USB device power on failure. This event fires when the USB interface fails to
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* initialize correctly due to a hardware or software fault.
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*
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* \param ErrorCode Error code indicating the failure reason, a value in USB_PowerOnErrorCodes_t
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* located in LowLevel.h.
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*/
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void USB_PowerOnFail(const uint8_t ErrorCode);
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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.
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*
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* \note This event only exists on USB AVR models which support dual role modes.
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*
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* \note This event does not exist if the USB_DEVICE_ONLY or USB_HOST_ONLY tokens have been supplied
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* to the compiler (see LowLevel.h documentation).
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*/
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void 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 ErrorCode Error code indicating the failure reason, a value in USB_Host_ErrorCodes_t
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* located in Host.h.
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*
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* \note This event only exists on USB AVR models which supports host mode.
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*
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* \note This event does not exist if the USB_DEVICE_ONLY token is supplied to the compiler (see
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* LowLevel.h documentation).
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*/
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void USB_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 USB_DeviceConnect event and so can be used to programatically start the USB management
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* task to reduce CPU consumption.
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*
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* \note This event only exists on USB AVR models which supports host mode.
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*
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* \note This event does not exist if the USB_DEVICE_ONLY token is supplied to the compiler (see
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* LowLevel.h documentation).
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*
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* \see USBTask.h for more information on the USB management task and reducing CPU usage.
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*/
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void USB_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 programatically stop the USB management task to reduce CPU consumption.
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*
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* \note This event only exists on USB AVR models which supports host mode.
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*
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* \note This event does not exist if the USB_DEVICE_ONLY token is supplied to the compiler (see
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* LowLevel.h documentation).
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*
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* \see USBTask.h for more information on the USB management task and reducing CPU usage.
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*/
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void USB_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 ErrorCode Error code indicating the failure reason, a value in
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* USB_Host_EnumerationErrorCodes_t located in Host.h.
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*
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* \param 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 USB_Host_SendControlRequest() function.
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*
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* \note This event only exists on USB AVR models which supports host mode.
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*
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* \note This event does not exist if the USB_DEVICE_ONLY token is supplied to the compiler (see
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* LowLevel.h documentation).
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*/
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void USB_DeviceEnumerationFailed(const uint8_t ErrorCode, 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, or when the library is in device mode, and the Host
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* has finished enumerating the device.
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*/
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void USB_DeviceEnumerationComplete(void);
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/** Event for unhandled control requests. This event fires when a the USB host issues a control
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* request to the control endpoint (address 0) that the library does not handle. This may either
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* be a standard request that the library has no handler code for, or a class specific request
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* issued to the device which must be handled appropriately. Due to the strict timing requirements
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* on control transfers, interrupts are disabled during control request processing.
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*
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* \param bRequest Request value, indicating what command the host has issued.
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* \param bmRequestType Mask indicating the request data direction (if any), type and recipient.
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*
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* \note This event does not exist if the USB_HOST_ONLY token is supplied to the compiler (see
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* LowLevel.h documentation).
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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 bmRequestType and bRequest values out (into the Request and RequestType parameters
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* respectively) so that it can correctly determine if it is able to handle the request
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* internally, or hand off the request to the user application via this event. Other request
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* parameters (wValue, wIndex, wLength, and Data) remain in the control endpoint bank until
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* read out by the user application for processing.
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*/
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void USB_UnhandledControlPacket(const uint8_t bRequest, const uint8_t bmRequestType);
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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 fires after the value of USB_ConfigurationNumber has been changed.
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*
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* \note This event does not exist if the USB_HOST_ONLY token is supplied to the compiler (see
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* LowLevel.h documentation).
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*/
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void USB_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.
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*
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* \note This event does not exist if the USB_HOST_ONLY token is supplied to the compiler (see
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* LowLevel.h documentation).
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*
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* \see USB_WakeUp() event for accompanying Wake Up event.
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*/
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void USB_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 lowe power state and back into normal operating
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* mode.
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*
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* \note This event does not exist if the USB_HOST_ONLY token is supplied to the compiler (see
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* LowLevel.h documentation).
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*
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* \see USB_Suspend() event for accompanying Suspend event.
|
||
|
|
*/
|
||
|
|
void USB_WakeUp(void);
|
||
|
|
|
||
|
|
/** Event for USB interface reset. This event fires when a the USB interface is in device mode, and
|
||
|
|
* a the USB host requests that the device reset its interface. This is generally hooked so that
|
||
|
|
* the USB control endpoint can be switched to interrupt driven mode, by selecting it and calling
|
||
|
|
* USB_INT_Enable(ENDPOINT_INT_SETUP). Before this event fires, all device endpoints are reset and
|
||
|
|
* disabled.
|
||
|
|
*
|
||
|
|
* \note This event does not exist if the USB_HOST_ONLY token is supplied to the compiler (see
|
||
|
|
* LowLevel.h documentation).
|
||
|
|
*/
|
||
|
|
void USB_Reset(void);
|
||
|
|
|
||
|
|
/** Event for USB device mode error. This event fires when the USB interface is in device mode,
|
||
|
|
* and an error occurs which prevents it from operating normally.
|
||
|
|
*
|
||
|
|
* \param ErrorCode Error code indicating the source of the error. One of the values in the
|
||
|
|
* USB_Device_ErrorCodes_t enum located in Device.h.
|
||
|
|
*
|
||
|
|
* \note This event does not exist if the USB_HOST_ONLY token is supplied to the compiler (see
|
||
|
|
* LowLevel.h documentation).
|
||
|
|
*/
|
||
|
|
void USB_DeviceError(const uint8_t ErrorCode);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Private Interface - For use in library only: */
|
||
|
|
#if !defined(__DOXYGEN__)
|
||
|
|
/* Macros: */
|
||
|
|
#define ALIAS_STUB(e) EVENT_HANDLER(e) ATTR_WEAK ATTR_ALIAS(USB_Event_Stub)
|
||
|
|
|
||
|
|
#if defined(USB_FULL_CONTROLLER) || defined(USB_MODIFIED_FULL_CONTROLLER)
|
||
|
|
#define USB_VBUSChange_P (void)
|
||
|
|
#define USB_VBUSConnect_P (void)
|
||
|
|
#define USB_VBUSDisconnect_P (void)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define USB_Connect_P (void)
|
||
|
|
#define USB_Disconnect_P (void)
|
||
|
|
#define USB_DeviceEnumerationComplete_P (void)
|
||
|
|
|
||
|
|
#if defined(USB_CAN_BE_BOTH)
|
||
|
|
#define USB_PowerOnFail_P (const uint8_t ErrorCode)
|
||
|
|
#define USB_UIDChange_P (void)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(USB_CAN_BE_HOST)
|
||
|
|
#define USB_HostError_P (const uint8_t ErrorCode)
|
||
|
|
#define USB_DeviceAttached_P (void)
|
||
|
|
#define USB_DeviceUnattached_P (void)
|
||
|
|
#define USB_DeviceEnumerationFailed_P (const uint8_t ErrorCode, const uint8_t SubErrorCode)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(USB_CAN_BE_DEVICE)
|
||
|
|
#define USB_UnhandledControlPacket_P (const uint8_t bRequest, const uint8_t bmRequestType)
|
||
|
|
#define USB_ConfigurationChanged_P (void)
|
||
|
|
#define USB_Suspend_P (void)
|
||
|
|
#define USB_WakeUp_P (void)
|
||
|
|
#define USB_Reset_P (void)
|
||
|
|
#define USB_DeviceError_P (const uint8_t ErrorCode)
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Function Prototypes: */
|
||
|
|
#if defined(INCLUDE_FROM_EVENTS_C)
|
||
|
|
void USB_Event_Stub (void) ATTR_CONST;
|
||
|
|
|
||
|
|
#if defined(USB_FULL_CONTROLLER) || defined(USB_MODIFIED_FULL_CONTROLLER)
|
||
|
|
ALIAS_STUB(USB_VBUSChange);
|
||
|
|
ALIAS_STUB(USB_VBUSConnect);
|
||
|
|
ALIAS_STUB(USB_VBUSDisconnect);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
ALIAS_STUB(USB_Connect);
|
||
|
|
ALIAS_STUB(USB_Disconnect);
|
||
|
|
ALIAS_STUB(USB_DeviceEnumerationComplete);
|
||
|
|
|
||
|
|
#if defined(USB_CAN_BE_BOTH)
|
||
|
|
ALIAS_STUB(USB_PowerOnFail);
|
||
|
|
ALIAS_STUB(USB_UIDChange);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(USB_CAN_BE_HOST)
|
||
|
|
ALIAS_STUB(USB_HostError);
|
||
|
|
ALIAS_STUB(USB_DeviceAttached);
|
||
|
|
ALIAS_STUB(USB_DeviceUnattached);
|
||
|
|
ALIAS_STUB(USB_DeviceEnumerationFailed);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if defined(USB_CAN_BE_DEVICE)
|
||
|
|
ALIAS_STUB(USB_UnhandledControlPacket);
|
||
|
|
ALIAS_STUB(USB_ConfigurationChanged);
|
||
|
|
ALIAS_STUB(USB_Suspend);
|
||
|
|
ALIAS_STUB(USB_WakeUp);
|
||
|
|
ALIAS_STUB(USB_Reset);
|
||
|
|
ALIAS_STUB(USB_DeviceError);
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* Disable C linkage for C++ Compilers: */
|
||
|
|
#if defined(__cplusplus)
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif
|