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/*
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_USBClassHID
* @defgroup Group_USBClassHIDHost HID Class Host Mode Driver
*
* \section Sec_Dependencies Module Source Dependencies
* The following files must be built with any user project that uses this module:
* - LUFA/Drivers/USB/Class/Host/HID.c
* - LUFA/Drivers/USB/Class/Host/HIDParser.c
*
* \section Module Description
* Host Mode USB Class driver framework interface, for the HID USB Class driver.
*
* @{
*/
#ifndef __HID_CLASS_HOST_H__
#define __HID_CLASS_HOST_H__
/* Includes: */
#include "../../USB.h"
#include "../Common/HID.h"
#include "HIDParser.h"
/* Enable C linkage for C++ Compilers: */
#if defined(__cplusplus)
extern "C" {
#endif
/* Public Interface - May be used in end-application: */
/* Macros: */
/** Error code for some HID Host functions, indicating a logical (and not hardware) error */
#define HID_ERROR_LOGICAL 0x80
/* Type Defines: */
/** Class state structure. An instance of this structure should be made within the user application,
* and passed to each of the HID class driver functions as the HIDInterfaceInfo parameter. This
* stores each HID interface's configuration and state information.
*/
typedef struct
{
const struct
{
uint8_t DataINPipeNumber; /**< Pipe number of the HID interface's IN data pipe */
uint8_t DataOUTPipeNumber; /**< Pipe number of the HID interface's OUT data pipe */
uint8_t HIDInterfaceProtocol; /**< HID interface protocol value to match against if a specific
* boot subclass protocol is required (e.g. keyboard, mouse), or
* leave as 0 to match against the first HID interface found
*/
HID_ReportInfo_t* HIDParserData; /**< HID parser data to store the parsed HID report data, when boot protocol
* is not used */
} Config; /**< Config data for the USB class interface within the device. All elements in this section
* <b>must</b> be set or the interface will fail to enumerate and operate correctly.
*/
struct
{
bool IsActive; /**< Indicates if the current interface instance is connected to an attached device, valid
* after \ref HID_Host_ConfigurePipes() is called and the Host state machine is in the
* Configured state
*/
uint8_t InterfaceNumber; /**< Interface index of the HID interface within the attached device */
uint16_t DataINPipeSize; /**< Size in bytes of the HID interface's IN data pipe */
uint16_t DataOUTPipeSize; /**< Size in bytes of the HID interface's OUT data pipe */
bool SupportsBootSubClass; /**< Indicates if the current interface instance supports the HID Boot
* Protocol when enabled via \ref USB_HID_Host_SetBootProtocol()
*/
uint16_t HIDReportSize; /**< Size in bytes of the HID report descriptor in the device */
} State; /**< State data for the USB class interface within the device. All elements in this section
* <b>may</b> be set to initial values, but may also be ignored to default to sane values when
* the interface is enumerated.
*/
} USB_ClassInfo_HID_Host_t;
/* Enums: */
/** Enum for the possible error codes returned by the \ref HID_Host_ConfigurePipes() function. */
enum HIDHost_EnumerationFailure_ErrorCodes_t
{
HID_ENUMERROR_NoError = 0, /**< Configuration Descriptor was processed successfully */
HID_ENUMERROR_InvalidConfigDescriptor = 1, /**< The device returned an invalid Configuration Descriptor */
HID_ENUMERROR_NoHIDInterfaceFound = 2, /**< A compatible HID interface was not found in the device's Configuration Descriptor */
HID_ENUMERROR_NoHIDDescriptorFound = 3, /**< The HID descriptor was not found in the device's HID interface */
HID_ENUMERROR_EndpointsNotFound = 4, /**< Compatible HID endpoints were not found in the device's HID interface */
};
/* Function Prototypes: */
/** General management task for a given Human Interface Class host class interface, required for the correct operation of
* the interface. This should be called frequently in the main program loop, before the master USB management task
* \ref USB_USBTask().
*
* \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class host configuration and state
*/
void HID_Host_USBTask(USB_ClassInfo_HID_Host_t* HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
/** Host interface configuration routine, to configure a given HID host interface instance using the Configuration
* Descriptor read from an attached USB device. This function automatically updates the given HID Host instance's
* state values and configures the pipes required to communicate with the interface if it is found within the
* device. This should be called once after the stack has enumerated the attached device, while the host state
* machine is in the Addressed state.
*
* \note Once the device pipes are configured, the HID device's reporting protocol <b>must</b> be set via a call
* to either the \ref USB_HID_Host_SetBootProtocol() or \ref USB_HID_Host_SetReportProtocol() function.
*
* \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class host configuration and state
* \param[in] ConfigDescriptorLength Length of the attached device's Configuration Descriptor
* \param[in] DeviceConfigDescriptor Pointer to a buffer containing the attached device's Configuration Descriptor
*
* \return A value from the \ref HIDHost_EnumerationFailure_ErrorCodes_t enum
*/
uint8_t HID_Host_ConfigurePipes(USB_ClassInfo_HID_Host_t* HIDInterfaceInfo, uint16_t ConfigDescriptorLength,
uint8_t* DeviceConfigDescriptor) ATTR_NON_NULL_PTR_ARG(1, 3);
/** Determines if a report has been received on the HID interface's IN report pipe, when the device is initialized
* into Report Protocol mode.
*
* \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class host configuration and state
*
* \return Boolean true if a report has been received, false otherwise
*/
bool HID_Host_IsReportReceived(USB_ClassInfo_HID_Host_t* HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
/** Switches the attached HID device's reporting protocol over to the Boot Report protocol mode, on supported devices.
*
* \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class host configuration and state
*
* \return \ref HID_ERROR_LOGICAL if the device does not support Boot Protocol mode, a value from the
* \ref USB_Host_SendControlErrorCodes_t enum otherwise
*/
uint8_t USB_HID_Host_SetBootProtocol(USB_ClassInfo_HID_Host_t* HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
/** Switches the attached HID device's reporting protocol over to the standard Report protocol mode. This also retrieves
* and parses the device's HID report descriptor, so that the size of each report can be determined in advance.
*
* \note Whether this function is used or not, the \ref CALLBACK_HIDParser_FilterHIDReportItem() callback from the HID
* Report Parser this function references <b>must</b> be implemented in the user code.
*
* \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class host configuration and state
*
* \return A value from the \ref USB_Host_SendControlErrorCodes_t enum if an error occurs while retrieving the HID
* Report descriptor or the setting of the Report protocol, \ref HID_ERROR_LOGICAL if the HID interface does
* not have a valid \ref HID_ReportInfo_t structure set in its configuration, a mask of \ref HID_ERROR_LOGICAL
* and a value from the \ref HID_Parse_ErrorCodes_t otherwise
*/
uint8_t USB_HID_Host_SetReportProtocol(USB_ClassInfo_HID_Host_t* HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
/* Private Interface - For use in library only: */
#if !defined(__DOXYGEN__)
/* Macros: */
#define HID_INTERFACE_CLASS 0x03
#define HID_FOUND_DATAPIPE_IN (1 << 0)
#define HID_FOUND_DATAPIPE_OUT (1 << 1)
/* Function Prototypes: */
#if defined(INCLUDE_FROM_HID_CLASS_HOST_C)
static uint8_t DComp_HID_Host_NextHIDInterface(void* CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
static uint8_t DComp_NextHID(void* CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
static uint8_t DComp_HID_Host_NextHIDInterfaceEndpoint(void* CurrentDescriptor) ATTR_NON_NULL_PTR_ARG(1);
#endif
#endif
/* Disable C linkage for C++ Compilers: */
#if defined(__cplusplus)
}
#endif
#endif
/** @} */
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