You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
128 lines
4.9 KiB
128 lines
4.9 KiB
/*
|
|
LUFA Library
|
|
Copyright (C) Dean Camera, 2009.
|
|
|
|
dean [at] fourwalledcubicle [dot] com
|
|
www.fourwalledcubicle.com
|
|
*/
|
|
|
|
/*
|
|
Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
|
|
|
|
Permission to use, copy, modify, and distribute this software
|
|
and its documentation for any purpose and without fee is hereby
|
|
granted, 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.
|
|
*/
|
|
|
|
/** \ingroup Group_USB
|
|
* @defgroup Group_OTGManagement USB On The Go (OTG) Management
|
|
*
|
|
* This module contains macros for embedded USB hosts with dual role On The Go capabilities, for managing role
|
|
* exchange. OTG is a way for two USB dual role devices to talk to one another directly without fixed device/host
|
|
* roles.
|
|
*
|
|
* @{
|
|
*/
|
|
|
|
#ifndef __USBOTG_H__
|
|
#define __USBOTG_H__
|
|
|
|
/* Includes: */
|
|
#include <avr/io.h>
|
|
#include <stdbool.h>
|
|
|
|
#include "../../../Common/Common.h"
|
|
|
|
/* Public Interface - May be used in end-application: */
|
|
/* Macros: */
|
|
/** Mask for the VBUS pulsing method of SRP, supported by some OTG devices.
|
|
*
|
|
* \see USB_OTG_DEV_Initiate_SRP()
|
|
*/
|
|
#define USB_OTG_SRP_VBUS (1 << SRPSEL)
|
|
|
|
/** Mask for the Data + pulsing method of SRP, supported by some OTG devices.
|
|
*
|
|
* \see USB_OTG_DEV_Initiate_SRP()
|
|
*/
|
|
#define USB_OTG_STP_DATA 0
|
|
|
|
/* Pseudo-Function Macros: */
|
|
#if defined(__DOXYGEN__)
|
|
/** 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_DEV_Request_HNP(void);
|
|
|
|
/** Cancel a Host Negotiation Protocol request. This stops a pending HNP request to the other
|
|
* connected device.
|
|
*/
|
|
static inline void USB_OTG_DEV_Cancel_HNP_Request(void);
|
|
|
|
/** Determines if the device is currently sending a HNP to an attached host.
|
|
*
|
|
* \return Boolean true if currently sending a HNP to the other connected device, false otherwise
|
|
*/
|
|
static inline bool USB_OTG_DEV_IsSendingHNP(void);
|
|
|
|
/** Accepts a HNP from a connected device, indicating that both devices should exchange
|
|
* device/host roles.
|
|
*/
|
|
static inline void USB_OTG_HOST_Accept_HNP(void);
|
|
|
|
/** 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_Reject_HNP(void);
|
|
|
|
/** Indicates if the connected device is not currently sending a HNP request.
|
|
*
|
|
* \return Boolean true if a HNP is currently being issued by the connected device, false otherwise.
|
|
*/
|
|
static inline bool USB_OTG_HOST_IsHNPReceived(void);
|
|
|
|
/** 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 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_DEV_Initiate_SRP(uint8_t SRPTypeMask);
|
|
#else
|
|
|
|
#define USB_OTG_DEV_Request_HNP() MACROS{ OTGCON |= (1 << HNPREQ); }MACROE
|
|
|
|
#define USB_OTG_DEV_Cancel_HNP_Request() MACROS{ OTGCON &= ~(1 << HNPREQ); }MACROE
|
|
|
|
#define USB_OTG_DEV_IsSendingHNP() ((OTGCON & (1 << HNPREQ)) ? true : false)
|
|
|
|
#define USB_OTG_HOST_Accept_HNP() MACROS{ OTGCON |= (1 << HNPREQ); }MACROE
|
|
|
|
#define USB_OTG_HOST_Reject_HNP() MACROS{ OTGCON &= ~(1 << HNPREQ); }MACROE
|
|
|
|
#define USB_OTG_HOST_IsHNPReceived() ((OTGCON & (1 << HNPREQ)) ? true : false)
|
|
|
|
#define USB_OTG_DEV_Initiate_SRP(type) MACROS{ OTGCON = ((OTGCON & ~(1 << SRPSEL)) | (type | (1 << SRPREQ))); }MACROE
|
|
#endif
|
|
|
|
#endif
|
|
|
|
/** @} */
|