diff options
Diffstat (limited to 'LUFA/Drivers/USB/Core/AVR8/OTG_AVR8.h')
| -rw-r--r-- | LUFA/Drivers/USB/Core/AVR8/OTG_AVR8.h | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/LUFA/Drivers/USB/Core/AVR8/OTG_AVR8.h b/LUFA/Drivers/USB/Core/AVR8/OTG_AVR8.h new file mode 100644 index 0000000000..74c70ccdfd --- /dev/null +++ b/LUFA/Drivers/USB/Core/AVR8/OTG_AVR8.h @@ -0,0 +1,159 @@ +/* + LUFA Library + Copyright (C) Dean Camera, 2017. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2017 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 disclaims 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 USB OTG definitions for the AVR8 microcontrollers. + * \copydetails Group_OTG_AVR8 + * + * \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. + */ + +/** \ingroup Group_OTG + * \defgroup Group_OTG_AVR8 USB On The Go (OTG) Management (AVR8) + * \brief USB OTG definitions for the AVR8 microcontrollers. + * + * Architecture specific USB OTG definitions for the Atmel 8-bit AVR microcontrollers. + * + * @{ + */ + +#ifndef __USBOTG_AVR8_H__ +#define __USBOTG_AVR8_H__ + + /* Includes: */ + #include "../../../../Common/Common.h" + + /* 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: */ + /* Macros: */ + /** Mask for the VBUS pulsing method of SRP, supported by some OTG devices. + * + * \see \ref USB_OTG_Device_InitiateSRP(). + */ + #define USB_OTG_SRP_VBUS (1 << SRPSEL) + + /** Mask for the Data + pulsing method of SRP, supported by some OTG devices. + * + * \see \ref USB_OTG_Device_InitiateSRP(). + */ + #define USB_OTG_STP_DATA 0 + + /* Inline Functions: */ + /** Initiate a Host Negotiation Protocol request. This indicates to the other connected device + * that the device wishes to change device/host roles. + */ + static inline void USB_OTG_Device_RequestHNP(void) ATTR_ALWAYS_INLINE; + static inline void USB_OTG_Device_RequestHNP(void) + { + OTGCON |= (1 << HNPREQ); + } + + /** Cancel a Host Negotiation Protocol request. This stops a pending HNP request to the other + * connected device. + */ + static inline void USB_OTG_Device_CancelHNPRequest(void) ATTR_ALWAYS_INLINE; + static inline void USB_OTG_Device_CancelHNPRequest(void) + { + OTGCON &= ~(1 << HNPREQ); + } + + /** Determines if the device is currently sending a HNP to an attached host. + * + * \return Boolean \c true if currently sending a HNP to the other connected device, \c false otherwise + */ + static inline bool USB_OTG_Device_IsSendingHNP(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE; + static inline bool USB_OTG_Device_IsSendingHNP(void) + { + return ((OTGCON & (1 << HNPREQ)) ? true : false); + } + + /** Initiates a Session Request Protocol request. Most OTG devices turn off VBUS when the USB + * interface is not in use, to conserve power. Sending a SRP to a USB OTG device running in + * host mode indicates that VBUS should be applied and a session started. + * + * There are two different methods of sending a SRP - either pulses on the VBUS line, or by + * pulsing the Data + line via the internal pull-up resistor. + * + * \param[in] SRPTypeMask Mask indicating the type of SRP to use, either \ref USB_OTG_SRP_VBUS or + * \ref USB_OTG_STP_DATA. + */ + static inline void USB_OTG_Device_InitiateSRP(const uint8_t SRPTypeMask) ATTR_ALWAYS_INLINE; + static inline void USB_OTG_Device_InitiateSRP(const uint8_t SRPTypeMask) + { + OTGCON = ((OTGCON & ~(1 << SRPSEL)) | (SRPTypeMask | (1 << SRPREQ))); + } + + /** Accepts a HNP from a connected device, indicating that both devices should exchange + * device/host roles. + */ + static inline void USB_OTG_Host_AcceptHNP(void) ATTR_ALWAYS_INLINE; + static inline void USB_OTG_Host_AcceptHNP(void) + { + OTGCON |= (1 << HNPREQ); + } + + /** Rejects a HNP from a connected device, indicating that both devices should remain in their + * current device/host roles. + */ + static inline void USB_OTG_Host_RejectHNP(void) ATTR_ALWAYS_INLINE; + static inline void USB_OTG_Host_RejectHNP(void) + { + OTGCON &= ~(1 << HNPREQ); + } + + /** Indicates if the connected device is currently sending a HNP request. + * + * \return Boolean \c true if a HNP is currently being issued by the connected device, \c false otherwise. + */ + static inline bool USB_OTG_Host_IsHNPReceived(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE; + static inline bool USB_OTG_Host_IsHNPReceived(void) + { + return ((OTGCON & (1 << HNPREQ)) ? true : false); + } + + /* Disable C linkage for C++ Compilers: */ + #if defined(__cplusplus) + } + #endif + +#endif + +/** @} */ + |