+++ /dev/null
-/*
- LUFA Library
- Copyright (C) Dean Camera, 2011.
-
- dean [at] fourwalledcubicle [dot] com
- www.lufa-lib.org
-*/
-
-/*
- Copyright 2011 Dean Camera (dean [at] fourwalledcubicle [dot] com)
-
- Permission to use, copy, modify, distribute, and sell this
- software and its documentation for any purpose is hereby granted
- without fee, provided that the above copyright notice appear in
- all copies and that both that the copyright notice and this
- permission notice and warranty disclaimer appear in supporting
- documentation, and that the name of the author not be used in
- advertising or publicity pertaining to distribution of the
- software without specific, written prior permission.
-
- The author disclaim all warranties with regard to this
- software, including all implied warranties of merchantability
- and fitness. In no event shall the author be liable for any
- special, indirect or consequential damages or any damages
- whatsoever resulting from loss of use, data or profits, whether
- in an action of contract, negligence or other tortious action,
- arising out of or in connection with the use or performance of
- this software.
-*/
-
-/** \file
- * \brief Main USB service task management.
- *
- * This file contains the function definitions required for the main USB service task, which must be called
- * from the user application to ensure that the USB connection to or from a connected USB device is maintained.
- *
- * \note This file should not be included directly. It is automatically included as needed by the USB driver
- * dispatch header located in LUFA/Drivers/USB/USB.h.
- */
-
-#ifndef __USBTASK_H__
-#define __USBTASK_H__
-
- /* Includes: */
- #include <avr/interrupt.h>
- #include <stdint.h>
- #include <stdbool.h>
-
- #include "../LowLevel/USBController.h"
- #include "Events.h"
- #include "StdRequestType.h"
- #include "StdDescriptors.h"
- #include "USBMode.h"
-
- #if defined(USB_CAN_BE_DEVICE)
- #include "DeviceStandardReq.h"
- #endif
-
- #if defined(USB_CAN_BE_HOST)
- #include "HostStandardReq.h"
- #endif
-
- /* Enable C linkage for C++ Compilers: */
- #if defined(__cplusplus)
- extern "C" {
- #endif
-
- /* Preprocessor Checks: */
- #if !defined(__INCLUDE_FROM_USB_DRIVER)
- #error Do not include this file directly. Include LUFA/Drivers/USB/USB.h instead.
- #endif
-
- /* Public Interface - May be used in end-application: */
- /* Global Variables: */
- /** Indicates if the USB interface is currently initialized but not necessarily connected to a host
- * or device (i.e. if \ref USB_Init() has been run). If this is false, all other library globals related
- * to the USB driver are invalid.
- *
- * \note This variable should be treated as read-only in the user application, and never manually
- * changed in value.
- *
- * \ingroup Group_USBManagement
- */
- extern volatile bool USB_IsInitialized;
-
- /** Structure containing the last received Control request when in Device mode (for use in user-applications
- * inside of the \ref EVENT_USB_Device_ControlRequest() event, or for filling up with a control request to
- * issue when in Host mode before calling \ref USB_Host_SendControlRequest().
- *
- * \ingroup Group_USBManagement
- */
- extern USB_Request_Header_t USB_ControlRequest;
-
- #if defined(USB_CAN_BE_HOST) || defined(__DOXYGEN__)
- #if !defined(HOST_STATE_AS_GPIOR) || defined(__DOXYGEN__)
- /** Indicates the current host state machine state. When in host mode, this indicates the state
- * via one of the values of the \ref USB_Host_States_t enum values.
- *
- * This value may be altered by the user application to implement the \ref HOST_STATE_Addressed,
- * \ref HOST_STATE_Configured and \ref HOST_STATE_Suspended states which are not implemented by
- * the library internally.
- *
- * To reduce program size and speed up checks of this global, it can be placed into one of the AVR's
- * GPIOR hardware registers instead of RAM by defining the HOST_STATE_AS_GPIOR token to a value
- * between 0 and 2 in the project makefile and passing it to the compiler via the -D switch. When
- * defined, the corresponding GPIOR register should not be used in the user application except
- * implicitly via the library APIs.
- *
- * \note This global is only present if the user application can be a USB host.
- *
- * \see \ref USB_Host_States_t for a list of possible device states.
- *
- * \ingroup Group_Host
- */
- extern volatile uint8_t USB_HostState;
- #else
- #define _GET_HOST_GPIOR_NAME2(y) GPIOR ## y
- #define _GET_HOST_GPIOR_NAME(x) _GET_HOST_GPIOR_NAME2(x)
- #define USB_HostState _GET_HOST_GPIOR_NAME(HOST_STATE_AS_GPIOR)
- #endif
- #endif
-
- #if defined(USB_CAN_BE_DEVICE) || defined(__DOXYGEN__)
- #if !defined(DEVICE_STATE_AS_GPIOR) || defined(__DOXYGEN__)
- /** Indicates the current device state machine state. When in device mode, this indicates the state
- * via one of the values of the \ref USB_Device_States_t enum values.
- *
- * This value should not be altered by the user application as it is handled automatically by the
- * library. The only exception to this rule is if the NO_LIMITED_CONTROLLER_CONNECT token is used
- * (see \ref EVENT_USB_Device_Connect() and \ref EVENT_USB_Device_Disconnect() events).
- *
- * To reduce program size and speed up checks of this global, it can be placed into one of the AVR's
- * GPIOR hardware registers instead of RAM by defining the DEVICE_STATE_AS_GPIOR token to a value
- * between 0 and 2 in the project makefile and passing it to the compiler via the -D switch. When
- * defined, the corresponding GPIOR register should not be used in the user application except
- * implicitly via the library APIs.
- *
- * \note This global is only present if the user application can be a USB device.
- * \n\n
- *
- * \note This variable should be treated as read-only in the user application, and never manually
- * changed in value except in the circumstances outlined above.
- *
- * \see \ref USB_Device_States_t for a list of possible device states.
- *
- * \ingroup Group_Device
- */
- extern volatile uint8_t USB_DeviceState;
- #else
- #define _GET_DEVICE_GPIOR_NAME2(y) GPIOR ## y
- #define _GET_DEVICE_GPIOR_NAME(x) _GET_DEVICE_GPIOR_NAME2(x)
- #define USB_DeviceState _GET_DEVICE_GPIOR_NAME(DEVICE_STATE_AS_GPIOR)
- #endif
- #endif
-
- /* Function Prototypes: */
- /** This is the main USB management task. The USB driver requires this task to be executed
- * continuously when the USB system is active (device attached in host mode, or attached to a host
- * in device mode) in order to manage USB communications. This task may be executed inside an RTOS,
- * fast timer ISR or the main user application loop.
- *
- * The USB task must be serviced within 30ms while in device mode, or within 1ms while in host mode.
- * The task may be serviced at all times, or (for minimum CPU consumption):
- *
- * - In device mode, it may be disabled at start-up, enabled on the firing of the \ref EVENT_USB_Device_Connect()
- * event and disabled again on the firing of the \ref EVENT_USB_Device_Disconnect() event.
- *
- * - In host mode, it may be disabled at start-up, enabled on the firing of the \ref EVENT_USB_Host_DeviceAttached()
- * event and disabled again on the firing of the \ref EVENT_USB_Host_DeviceEnumerationComplete() or
- * \ref EVENT_USB_Host_DeviceEnumerationFailed() events.
- *
- * If in device mode (only), the control endpoint can instead be managed via interrupts entirely by the library
- * by defining the INTERRUPT_CONTROL_ENDPOINT token and passing it to the compiler via the -D switch.
- *
- * \see \ref Group_Events for more information on the USB events.
- *
- * \ingroup Group_USBManagement
- */
- void USB_USBTask(void);
-
- /* Private Interface - For use in library only: */
- #if !defined(__DOXYGEN__)
- /* Function Prototypes: */
- #if defined(__INCLUDE_FROM_USBTASK_C)
- #if defined(USB_CAN_BE_HOST)
- static void USB_HostTask(void);
- #endif
-
- #if defined(USB_CAN_BE_DEVICE)
- static void USB_DeviceTask(void);
- #endif
- #endif
-
- /* Macros: */
- #define HOST_TASK_NONBLOCK_WAIT(Duration, NextState) MACROS{ USB_HostState = HOST_STATE_WaitForDevice; \
- WaitMSRemaining = (Duration); \
- PostWaitState = (NextState); }MACROE
- #endif
-
- /* Disable C linkage for C++ Compilers: */
- #if defined(__cplusplus)
- }
- #endif
-
-#endif
-
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