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418 lines
23 KiB
418 lines
23 KiB
/*
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LUFA Library
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Copyright (C) Dean Camera, 2010.
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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 2010 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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/** \ingroup Group_USB
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* @defgroup Group_Host Host Management
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*
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* USB Host mode related macros and enums. This module contains macros and enums which are used when
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* the USB controller is initialized in host mode.
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*
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* @{
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*/
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#ifndef __USBHOST_H__
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#define __USBHOST_H__
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/* Includes: */
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#include <avr/io.h>
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#include <stdbool.h>
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#include <util/delay.h>
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#include "../../../Common/Common.h"
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#include "../HighLevel/USBInterrupt.h"
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#include "../HighLevel/StdDescriptors.h"
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#include "Pipe.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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/* Macros: */
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/** Indicates the fixed USB device address which any attached device is enumerated to when in
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* host mode. As only one USB device may be attached to the AVR in host mode at any one time
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* and that the address used is not important (other than the fact that it is non-zero), a
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* fixed value is specified by the library.
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*/
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#define USB_HOST_DEVICEADDRESS 1
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#if !defined(USB_HOST_TIMEOUT_MS) || defined(__DOXYGEN__)
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/** Constant for the maximum software timeout period of sent USB control transactions to an attached
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* device. If a device fails to respond to a sent control request within this period, the
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* library will return a timeout error code.
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*
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* This value may be overridden in the user project makefile as the value of the
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* \ref USB_HOST_TIMEOUT_MS token, and passed to the compiler using the -D switch.
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*/
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#define USB_HOST_TIMEOUT_MS 1000
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#endif
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#if !defined(HOST_DEVICE_SETTLE_DELAY_MS) || defined(__DOXYGEN__)
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/** Constant for the delay in milliseconds after a device is connected before the library
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* will start the enumeration process. Some devices require a delay of up to 5 seconds
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* after connection before the enumeration process can start or incorrect operation will
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* occur.
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*
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* This value may be overridden in the user project makefile as the value of the
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* HOST_DEVICE_SETTLE_DELAY_MS token, and passed to the compiler using the -D switch.
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*/
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#define HOST_DEVICE_SETTLE_DELAY_MS 1500
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#endif
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/* Pseudo-Function Macros: */
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#if defined(__DOXYGEN__)
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/** Resets the USB bus, including the endpoints in any attached device and pipes on the AVR host.
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* USB bus resets leave the default control pipe configured (if already configured).
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*
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* If the USB bus has been suspended prior to issuing a bus reset, the attached device will be
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* woken up automatically and the bus resumed after the reset has been correctly issued.
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*/
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static inline void USB_Host_ResetBus(void);
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/** Determines if a previously issued bus reset (via the \ref USB_Host_ResetBus() macro) has
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* completed.
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*
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* \return Boolean true if no bus reset is currently being sent, false otherwise.
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*/
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static inline void USB_Host_IsBusResetComplete(void);
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/** Resumes USB communications with an attached and enumerated device, by resuming the transmission
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* of the 1MS Start Of Frame messages to the device. When resumed, USB communications between the
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* host and attached device may occur.
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*/
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static inline void USB_Host_ResumeBus(void);
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/** Suspends the USB bus, preventing any communications from occurring between the host and attached
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* device until the bus has been resumed. This stops the transmission of the 1MS Start Of Frame
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* messages to the device.
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*/
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static inline void USB_Host_SuspendBus(void);
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/** Determines if the USB bus has been suspended via the use of the \ref USB_Host_SuspendBus() macro,
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* false otherwise. While suspended, no USB communications can occur until the bus is resumed,
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* except for the Remote Wakeup event from the device if supported.
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*
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* \return Boolean true if the bus is currently suspended, false otherwise
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*/
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static inline bool USB_Host_IsBusSuspended(void);
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/** Determines if the attached device is currently enumerated in Full Speed mode (12Mb/s), or
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* false if the attached device is enumerated in Low Speed mode (1.5Mb/s).
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*
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* \return Boolean true if the attached device is enumerated in Full Speed mode, false otherwise
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*/
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static inline bool USB_Host_IsDeviceFullSpeed(void);
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/** Determines if the attached device is currently issuing a Remote Wakeup request, requesting
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* that the host resume the USB bus and wake up the device, false otherwise.
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*
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* \return Boolean true if the attached device has sent a Remote Wakeup request, false otherwise
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*/
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static inline bool USB_Host_IsRemoteWakeupSent(void);
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/** Clears the flag indicating that a Remote Wakeup request has been issued by an attached device. */
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static inline void USB_Host_ClearRemoteWakeupSent(void);
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/** Accepts a Remote Wakeup request from an attached device. This must be issued in response to
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* a device's Remote Wakeup request within 2ms for the request to be accepted and the bus to
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* be resumed.
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*/
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static inline void USB_Host_ResumeFromWakeupRequest(void);
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/** Determines if a resume from Remote Wakeup request is currently being sent to an attached
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* device.
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*
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* \return Boolean true if no resume request is currently being sent, false otherwise
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*/
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static inline bool USB_Host_IsResumeFromWakeupRequestSent(void);
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#else
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#define USB_Host_ResetBus() MACROS{ UHCON |= (1 << RESET); }MACROE
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#define USB_Host_IsBusResetComplete() ((UHCON & (1 << RESET)) ? false : true)
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#define USB_Host_ResumeBus() MACROS{ UHCON |= (1 << SOFEN); }MACROE
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#define USB_Host_SuspendBus() MACROS{ UHCON &= ~(1 << SOFEN); }MACROE
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#define USB_Host_IsBusSuspended() ((UHCON & (1 << SOFEN)) ? false : true)
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#define USB_Host_IsDeviceFullSpeed() ((USBSTA & (1 << SPEED)) ? true : false)
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#define USB_Host_IsRemoteWakeupSent() ((UHINT & (1 << RXRSMI)) ? true : false)
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#define USB_Host_ClearRemoteWakeupSent() MACROS{ UHINT &= ~(1 << RXRSMI); }MACROE
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#define USB_Host_ResumeFromWakeupRequest() MACROS{ UHCON |= (1 << RESUME); }MACROE
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#define USB_Host_IsResumeFromWakeupRequestSent() ((UHCON & (1 << RESUME)) ? false : true)
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#endif
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/* Function Prototypes: */
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/** Convenience function. This routine sends a SetConfiguration standard request to the attached
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* device, with the given configuration index. This can be used to easily set the device
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* configuration without creating and sending the request manually.
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*
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* \note After this routine returns, the control pipe will be selected.
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*
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* \param[in] ConfigNumber Configuration index to send to the device
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*
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* \return A value from the \ref USB_Host_SendControlErrorCodes_t enum to indicate the result.
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*/
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uint8_t USB_Host_SetDeviceConfiguration(const uint8_t ConfigNumber);
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/** Convenience function. This routine sends a GetDescriptor standard request to the attached
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* device, requesting the device descriptor. This can be used to easily retrieve information
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* about the device such as its VID, PID and power requirements.
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*
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* \note After this routine returns, the control pipe will be selected.
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*
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* \param[out] DeviceDescriptorPtr Pointer to the destination device descriptor structure where
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* the read data is to be stored
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*
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* \return A value from the \ref USB_Host_SendControlErrorCodes_t enum to indicate the result.
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*/
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uint8_t USB_Host_GetDeviceDescriptor(void* const DeviceDescriptorPtr);
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/** Convenience function. This routine sends a GetDescriptor standard request to the attached
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* device, requesting the string descriptor of the specified index. This can be used to easily
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* retrieve string descriptors from the device by index, after the index is obtained from the
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* Device or Configuration descriptors.
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*
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* \note After this routine returns, the control pipe will be selected.
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*
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* \param[in] Index Index of the string index to retrieve
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* \param[out] Buffer Pointer to the destination buffer where the retrieved string decriptor is
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* to be stored
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* \param[in] BufferLength Maximum size of the string descriptor which can be stored into the buffer
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*
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* \return A value from the \ref USB_Host_SendControlErrorCodes_t enum to indicate the result.
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*/
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uint8_t USB_Host_GetDeviceStringDescriptor(uint8_t Index, void* const Buffer, uint8_t BufferLength);
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/** Clears a stall condition on the given pipe, via a ClearFeature request to the attached device.
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*
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* \note After this routine returns, the control pipe will be selected.
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*
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* \param[in] EndpointIndex Index of the endpoint to clear
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*
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* \return A value from the \ref USB_Host_SendControlErrorCodes_t enum to indicate the result.
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*/
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uint8_t USB_Host_ClearPipeStall(uint8_t EndpointIndex);
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/* Enums: */
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/** Enum for the various states of the USB Host state machine. Only some states are
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* implemented in the LUFA library - other states are left to the user to implement.
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*
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* For information on each state, refer to the USB 2.0 specification. Some states have
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*
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* \see \ref USB_HostState, which stores the current host state machine state.
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*/
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enum USB_Host_States_t
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{
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HOST_STATE_WaitForDeviceRemoval = 0, /**< Internally implemented by the library. This state can be
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* used by the library to wait until the attached device is
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* removed by the user - useful for when an error occurs or
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* further communication with the device is not needed. This
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* allows for other code to run while the state machine is
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* effectively disabled.
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*/
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HOST_STATE_WaitForDevice = 1, /**< Internally implemented by the library. This state indicates
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* that the stack is waiting for an interval to elapse before
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* continuing with the next step of the device enumeration
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* process.
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*
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* \note Do not manually change to this state in the user code.
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*/
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HOST_STATE_Unattached = 2, /**< Internally implemented by the library. This state indicates
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* that the host state machine is waiting for a device to be
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* attached so that it can start the enumeration process.
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*
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* \note Do not manually change to this state in the user code.
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*/
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HOST_STATE_Powered = 3, /**< Internally implemented by the library. This state indicates
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* that a device has been attached, and the library's internals
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* are being configured to begin the enumeration process.
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*
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* \note Do not manually change to this state in the user code.
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*/
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HOST_STATE_Powered_WaitForDeviceSettle = 4, /**< Internally implemented by the library. This state indicates
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* that the stack is waiting for the initial settling period to
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* elapse before beginning the enumeration process.
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*
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* \note Do not manually change to this state in the user code.
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*/
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HOST_STATE_Powered_WaitForConnect = 5, /**< Internally implemented by the library. This state indicates
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* that the stack is waiting for a connection event from the USB
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* controller to indicate a valid USB device has been attached to
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* the bus and is ready to be enumerated.
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*
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* \note Do not manually change to this state in the user code.
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*/
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HOST_STATE_Powered_DoReset = 6, /**< Internally implemented by the library. This state indicates
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* that a valid USB device has been attached, and that it is
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* will now be reset to ensure it is ready for enumeration.
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*
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* \note Do not manually change to this state in the user code.
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*/
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HOST_STATE_Powered_ConfigPipe = 7, /**< Internally implemented by the library. This state indicates
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* that the attached device is currently powered and reset, and
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* that the control pipe is now being configured by the stack.
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*
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* \note Do not manually change to this state in the user code.
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*/
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HOST_STATE_Default = 8, /**< Internally implemented by the library. This state indicates
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* that the stack is currently retrieving the control endpoint's
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* size from the device, so that the control pipe can be altered
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* to match.
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*
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* \note Do not manually change to this state in the user code.
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*/
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HOST_STATE_Default_PostReset = 9, /**< Internally implemented by the library. This state indicates that
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* the control pipe is being reconfigured to match the retrieved
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* control endpoint size from the device, and the device's USB bus
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* address is being set.
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*
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* \note Do not manually change to this state in the user code.
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*/
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HOST_STATE_Default_PostAddressSet = 10, /**< Internally implemented by the library. This state indicates that
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* the device's address has now been set, and the stack is has now
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* completed the device enumeration process. This state causes the
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* stack to change the current USB device address to that set for
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* the connected device, before progressing to the user-implemented
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* HOST_STATE_Addressed state for further communications.
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*
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* \note Do not manually change to this state in the user code.
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*/
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HOST_STATE_Addressed = 11, /**< May be implemented by the user project. This state should
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* set the device configuration before progressing to the
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* HOST_STATE_Configured state. Other processing (such as the
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* retrieval and processing of the device descriptor) should also
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* be placed in this state.
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*/
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HOST_STATE_Configured = 12, /**< May be implemented by the user project. This state should implement the
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* actual work performed on the attached device and changed to the
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* HOST_STATE_Suspended or HOST_STATE_WaitForDeviceRemoval states as needed.
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*/
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HOST_STATE_Suspended = 15, /**< May be implemented by the user project. This state should be maintained
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* while the bus is suspended, and changed to either the HOST_STATE_Configured
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* (after resuming the bus with the USB_Host_ResumeBus() macro) or the
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* HOST_STATE_WaitForDeviceRemoval states as needed.
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*/
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};
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/** Enum for the error codes for the \ref EVENT_USB_Host_HostError() event.
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*
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* \see \ref Group_Events for more information on this event.
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*/
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enum USB_Host_ErrorCodes_t
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{
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HOST_ERROR_VBusVoltageDip = 0, /**< VBUS voltage dipped to an unacceptable level. This
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* error may be the result of an attached device drawing
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* too much current from the VBUS line, or due to the
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* AVR's power source being unable to supply sufficient
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* current.
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*/
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};
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/** Enum for the error codes for the \ref EVENT_USB_Host_DeviceEnumerationFailed() event.
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*
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* \see \ref Group_Events for more information on this event.
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*/
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enum USB_Host_EnumerationErrorCodes_t
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{
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HOST_ENUMERROR_NoError = 0, /**< No error occurred. Used internally, this is not a valid
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* ErrorCode parameter value for the \ref EVENT_USB_Host_DeviceEnumerationFailed()
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* event.
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*/
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HOST_ENUMERROR_WaitStage = 1, /**< One of the delays between enumeration steps failed
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* to complete successfully, due to a timeout or other
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* error.
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*/
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HOST_ENUMERROR_NoDeviceDetected = 2, /**< No device was detected, despite the USB data lines
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* indicating the attachment of a device.
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*/
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HOST_ENUMERROR_ControlError = 3, /**< One of the enumeration control requests failed to
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* complete successfully.
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*/
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HOST_ENUMERROR_PipeConfigError = 4, /**< The default control pipe (address 0) failed to
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* configure correctly.
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*/
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};
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/* Private Interface - For use in library only: */
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#if !defined(__DOXYGEN__)
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/* Macros: */
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#define USB_Host_HostMode_On() MACROS{ USBCON |= (1 << HOST); }MACROE
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#define USB_Host_HostMode_Off() MACROS{ USBCON &= ~(1 << HOST); }MACROE
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#define USB_Host_VBUS_Auto_Enable() MACROS{ OTGCON &= ~(1 << VBUSHWC); UHWCON |= (1 << UVCONE); }MACROE
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#define USB_Host_VBUS_Manual_Enable() MACROS{ OTGCON |= (1 << VBUSHWC); UHWCON &= ~(1 << UVCONE); DDRE |= (1 << 7); }MACROE
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#define USB_Host_VBUS_Auto_On() MACROS{ OTGCON |= (1 << VBUSREQ); }MACROE
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#define USB_Host_VBUS_Manual_On() MACROS{ PORTE |= (1 << 7); }MACROE
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#define USB_Host_VBUS_Auto_Off() MACROS{ OTGCON |= (1 << VBUSRQC); }MACROE
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#define USB_Host_VBUS_Manual_Off() MACROS{ PORTE &= ~(1 << 7); }MACROE
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#define USB_Host_SetDeviceAddress(addr) MACROS{ UHADDR = ((addr) & 0x7F); }MACROE
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/* Enums: */
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enum USB_Host_WaitMSErrorCodes_t
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{
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HOST_WAITERROR_Successful = 0,
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HOST_WAITERROR_DeviceDisconnect = 1,
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HOST_WAITERROR_PipeError = 2,
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HOST_WAITERROR_SetupStalled = 3,
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};
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/* Function Prototypes: */
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void USB_Host_ProcessNextHostState(void);
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uint8_t USB_Host_WaitMS(uint8_t MS);
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#if defined(__INCLUDE_FROM_HOST_C)
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static void USB_Host_ResetDevice(void);
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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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