208 lines
11 KiB
C
208 lines
11 KiB
C
/*
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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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/** \ingroup Group_USB
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* @defgroup Group_Device Device Management
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*
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* USB Device 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 device mode.
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*
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* @{
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*/
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#ifndef __USBDEVICE_H__
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#define __USBDEVICE_H__
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/* Includes: */
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#include <avr/pgmspace.h>
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#include <avr/eeprom.h>
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#include "../../../Common/Common.h"
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#include "../HighLevel/StdDescriptors.h"
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#include "Endpoint.h"
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/* Preprocessor Checks: */
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#if (defined(USE_RAM_DESCRIPTORS) && defined(USE_EEPROM_DESCRIPTORS))
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#error USE_RAM_DESCRIPTORS and USE_EEPROM_DESCRIPTORS are mutually exclusive.
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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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#if defined(USB_SERIES_4_AVR) || defined(USB_SERIES_6_AVR) || defined(USB_SERIES_7_AVR) || defined(__DOXYGEN__)
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/** Mask for the Options parameter of the \ref USB_Init() function. This indicates that the
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* USB interface should be initialized in low speed (1.5Mb/s) mode.
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*
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* \note Low Speed mode is not available on all USB AVR models.
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*
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* \note Restrictions apply on the number, size and type of endpoints which can be used
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* when running in low speed mode -- refer to the USB 2.0 standard.
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*/
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#define USB_DEVICE_OPT_LOWSPEED (1 << 0)
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#endif
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/** Mask for the Options parameter of the USB_Init() function. This indicates that the
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* USB interface should be initialized in full speed (12Mb/s) mode.
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*/
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#define USB_DEVICE_OPT_FULLSPEED (0 << 0)
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/* Pseudo-Function Macros: */
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#if defined(__DOXYGEN__)
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/** Sends a Remote Wakeup request to the host. This signals to the host that the device should
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* be taken out of suspended mode, and communications should resume.
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*
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* Typically, this is implemented so that HID devices (mice, keyboards, etc.) can wake up the
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* host computer when the host has suspended all USB devices to enter a low power state.
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*
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* \note This macro should only be used if the device has indicated to the host that it
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* supports the Remote Wakeup feature in the device descriptors, and should only be
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* issued if the host is currently allowing remote wakeup events from the device (i.e.,
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* the \ref USB_RemoteWakeupEnabled flag is set).
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*
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* \see \ref Group_Descriptors for more information on the RMWAKEUP feature and device descriptors.
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*/
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static inline void USB_Device_SendRemoteWakeup(void);
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/** Indicates if a Remote Wakeup request is being sent to the host. This returns true if a
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* remote wakeup is currently being sent, false otherwise.
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*
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* This can be used in conjunction with the \ref USB_Device_IsUSBSuspended() macro to determine if
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* a sent RMWAKEUP request was accepted or rejected by the host.
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*
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* \note This macro should only be used if the device has indicated to the host that it
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* supports the Remote Wakeup feature in the device descriptors.
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*
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* \see \ref Group_Descriptors for more information on the RMWAKEUP feature and device descriptors.
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*
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* \return Boolean true if no Remote Wakeup request is currently being sent, false otherwise
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*/
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static inline bool USB_Device_IsRemoteWakeupSent(void);
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/** Indicates if the device is currently suspended by the host. Whilst suspended, the device is
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* to enter a low power state until resumed by the host. No USB traffic to or from the device
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* can occur (except for Remote Wakeup requests) during suspension by the host.
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*
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* \return Boolean true if the USB communications have been suspended by the host, false otherwise.
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*/
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static inline bool USB_Device_IsUSBSuspended(void);
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/** Enables the device mode Start Of Frame events. When enabled, this causes the
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* \ref EVENT_USB_Device_StartOfFrame() event to fire once per millisecond, synchronised to the USB bus,
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* at the start of each USB frame when enumerated in device mode.
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*/
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static inline bool USB_Device_EnableSOFEvents(void);
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/** Disables the device mode Start Of Frame events. When disabled, this stop the firing of the
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* \ref EVENT_USB_Device_StartOfFrame() event when enumerated in device mode.
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*/
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static inline bool USB_Device_DisableSOFEvents(void);
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#else
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#define USB_Device_SendRemoteWakeup() MACROS{ UDCON |= (1 << RMWKUP); }MACROE
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#define USB_Device_IsRemoteWakeupSent() ((UDCON & (1 << RMWKUP)) ? false : true)
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#define USB_Device_IsUSBSuspended() ((UDINT & (1 << SUSPI)) ? true : false)
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#define USB_Device_EnableSOFEvents() MACROS{ USB_INT_Enable(USB_INT_SOFI); }MACROE
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#define USB_Device_DisableSOFEvents() MACROS{ USB_INT_Disable(USB_INT_SOFI); }MACROE
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#endif
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/* Type Defines: */
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enum USB_Device_States_t
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{
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DEVICE_STATE_Unattached = 0, /**< Internally implemented by the library. This state indicates
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* that the device is not currently connected to a host.
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*/
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DEVICE_STATE_Powered = 1, /**< Internally implemented by the library. This state indicates
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* that the device is connected to a host, but enumeration has not
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* yet begun.
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*/
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DEVICE_STATE_Default = 2, /**< Internally implemented by the library. This state indicates
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* that the device's USB bus has been reset by the host and it is
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* now waiting for the host to begin the enumeration process.
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*/
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DEVICE_STATE_Addressed = 3, /**< Internally implemented by the library. This state indicates
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* that the device has been addressed by the USB Host, but is not
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* yet configured.
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*/
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DEVICE_STATE_Configured = 4, /**< May be implemented by the user project. This state indicates
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* that the device has been enumerated by the host and is ready
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* for USB communications to begin.
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*/
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DEVICE_STATE_Suspended = 5, /**< May be implemented by the user project. This state indicates
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* that the USB bus has been suspended by the host, and the device
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* should power down to a minimal power level until the bus is
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* resumed.
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*/
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};
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/* Function Prototypes: */
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/** Function to retrieve a given descriptor's size and memory location from the given descriptor type value,
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* index and language ID. This function MUST be overridden in the user application (added with full, identical
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* prototype and name so that the library can call it to retrieve descriptor data.
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*
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* \param[in] wValue The type of the descriptor to retrieve in the upper byte, and the index in the
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* lower byte (when more than one descriptor of the given type exists, such as the
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* case of string descriptors). The type may be one of the standard types defined
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* in the DescriptorTypes_t enum, or may be a class-specific descriptor type value.
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* \param[in] wIndex The language ID of the string to return if the wValue type indicates DTYPE_String,
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* otherwise zero for standard descriptors, or as defined in a class-specific
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* standards.
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* \param[out] DescriptorAddress Pointer to the descriptor in memory. This should be set by the routine to
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* the address of the descriptor.
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* \param[out] MemoryAddressSpace A value from the \ref USB_DescriptorMemorySpaces_t enum to indicate the memory
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* space in which the descriptor is stored. This parameter does not exist when one
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* of the USE_*_DESCRIPTORS compile time options is used.
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*
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* \note By default, the library expects all descriptors to be located in flash memory via the PROGMEM attribute.
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* If descriptors should be located in RAM or EEPROM instead (to speed up access in the case of RAM, or to
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* allow the descriptors to be changed dynamically at runtime) either the USE_RAM_DESCRIPTORS or the
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* USE_EEPROM_DESCRIPTORS tokens may be defined in the project makefile and passed to the compiler by the -D
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* switch.
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*
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* \return Size in bytes of the descriptor if it exists, zero or \ref NO_DESCRIPTOR otherwise
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*/
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uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue, const uint8_t wIndex, void** const DescriptorAddress
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#if !defined(USE_FLASH_DESCRIPTORS) && !defined(USE_EEPROM_DESCRIPTORS) && !defined(USE_RAM_DESCRIPTORS)
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, uint8_t* MemoryAddressSpace
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#endif
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)
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ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(3);
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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_Device_SetLowSpeed() MACROS{ UDCON |= (1 << LSM); }MACROE
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#define USB_Device_SetFullSpeed() MACROS{ UDCON &= ~(1 << LSM); }MACROE
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#endif
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#endif
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/** @} */
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