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Diffstat (limited to 'LUFA/Drivers/USB/Class/Device/HID.h')
| -rw-r--r-- | LUFA/Drivers/USB/Class/Device/HID.h | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/LUFA/Drivers/USB/Class/Device/HID.h b/LUFA/Drivers/USB/Class/Device/HID.h new file mode 100644 index 0000000..49358f5 --- /dev/null +++ b/LUFA/Drivers/USB/Class/Device/HID.h @@ -0,0 +1,222 @@ +/*
+ LUFA Library
+ Copyright (C) Dean Camera, 2010.
+
+ dean [at] fourwalledcubicle [dot] com
+ www.lufa-lib.org
+*/
+
+/*
+ Copyright 2010 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 Device mode driver for the library USB HID Class driver.
+ *
+ * Device mode driver for the library USB HID Class driver.
+ *
+ * \note This file should not be included directly. It is automatically included as needed by the USB module driver
+ * dispatch header located in LUFA/Drivers/USB.h.
+ */
+
+/** \ingroup Group_USBClassHID
+ * @defgroup Group_USBClassHIDDevice HID Class Device 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/Device/HID.c <i>(Makefile source module name: LUFA_SRC_USBCLASS)</i>
+ *
+ * \section Module Description
+ * Device Mode USB Class driver framework interface, for the HID USB Class driver.
+ *
+ * @{
+ */
+
+#ifndef _HID_CLASS_DEVICE_H_
+#define _HID_CLASS_DEVICE_H_
+
+ /* Includes: */
+ #include "../../USB.h"
+ #include "../Common/HID.h"
+
+ #include <string.h>
+
+ /* Enable C linkage for C++ Compilers: */
+ #if defined(__cplusplus)
+ extern "C" {
+ #endif
+
+ /* Preprocessor Checks: */
+ #if !defined(__INCLUDE_FROM_HID_DRIVER)
+ #error Do not include this file directly. Include LUFA/Drivers/USB.h instead.
+ #endif
+
+ #if defined(__INCLUDE_FROM_HID_DEVICE_C) && defined(NO_STREAM_CALLBACKS)
+ #error The NO_STREAM_CALLBACKS compile time option cannot be used in projects using the library Class drivers.
+ #endif
+
+
+ /* Public Interface - May be used in end-application: */
+ /* Type Defines: */
+ /** \brief HID Class Device Mode Configuration and State Structure.
+ *
+ * Class state structure. An instance of this structure should be made for each HID interface
+ * 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.
+ *
+ * \note Due to technical limitations, the HID device class driver does not utilize a separate OUT
+ * endpoint for host->device communications. Instead, the host->device data (if any) is sent to
+ * the device via the control endpoint.
+ */
+ typedef struct
+ {
+ const struct
+ {
+ uint8_t InterfaceNumber; /**< Interface number of the HID interface within the device. */
+
+ uint8_t ReportINEndpointNumber; /**< Endpoint number of the HID interface's IN report endpoint. */
+ uint16_t ReportINEndpointSize; /**< Size in bytes of the HID interface's IN report endpoint. */
+ bool ReportINEndpointDoubleBank; /**< Indicates if the HID interface's IN report endpoint should use double banking. */
+
+ void* PrevReportINBuffer; /**< Pointer to a buffer where the previously created HID input report can be
+ * stored by the driver, for comparison purposes to detect report changes that
+ * must be sent immediately to the host. This should point to a buffer big enough
+ * to hold the largest HID input report sent from the HID interface. If this is set
+ * to NULL, it is up to the user to force transfers when needed in the
+ * \ref CALLBACK_HID_Device_CreateHIDReport() callback function.
+ *
+ * \note Due to the single buffer, the internal driver can only correctly compare
+ * subsequent reports with identical report IDs. In multiple report devices,
+ * this buffer should be set to NULL and the decision to send reports made
+ * by the user application instead.
+ */
+ uint8_t PrevReportINBufferSize; /**< Size in bytes of the given input report buffer. This is used to create a
+ * second buffer of the same size within the driver so that subsequent reports
+ * can be compared. If the user app is to determine when reports are to be sent
+ * exclusively (i.e. \ref PrevReportINBuffer is NULL) this value must still be
+ * set to the size of the largest report the device can issue to the host.
+ */
+ } 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 UsingReportProtocol; /**< Indicates if the HID interface is set to Boot or Report protocol mode. */
+ uint16_t IdleCount; /**< Report idle period, in milliseconds, set by the host. */
+ uint16_t IdleMSRemaining; /**< Total number of milliseconds remaining before the idle period elapsed - this
+ * should be decremented by the user application if non-zero each millisecond. */
+ } State; /**< State data for the USB class interface within the device. All elements in this section
+ * are reset to their defaults when the interface is enumerated.
+ */
+ } USB_ClassInfo_HID_Device_t;
+
+ /* Function Prototypes: */
+ /** Configures the endpoints of a given HID interface, ready for use. This should be linked to the library
+ * \ref EVENT_USB_Device_ConfigurationChanged() event so that the endpoints are configured when the configuration
+ * containing the given HID interface is selected.
+ *
+ * \note The endpoint index numbers as given in the interface's configuration structure must not overlap with any other
+ * interface, or endpoint bank corruption will occur. Gaps in the allocated endpoint numbers or non-sequential indexes
+ * within a single interface is allowed, but no two interfaces of any type have have interleaved endpoint indexes.
+ *
+ * \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class configuration and state.
+ *
+ * \return Boolean true if the endpoints were successfully configured, false otherwise.
+ */
+ bool HID_Device_ConfigureEndpoints(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
+
+ /** Processes incoming control requests from the host, that are directed to the given HID class interface. This should be
+ * linked to the library \ref EVENT_USB_Device_ControlRequest() event.
+ *
+ * \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class configuration and state.
+ */
+ void HID_Device_ProcessControlRequest(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
+
+ /** General management task for a given HID 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 configuration and state.
+ */
+ void HID_Device_USBTask(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
+
+ /** HID class driver callback for the user creation of a HID IN report. This callback may fire in response to either
+ * HID class control requests from the host, or by the normal HID endpoint polling procedure. Inside this callback the
+ * user is responsible for the creation of the next HID input report to be sent to the host.
+ *
+ * \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class configuration and state.
+ * \param[in,out] ReportID If preset to a non-zero value, this is the report ID being requested by the host. If zero,
+ * this should be set to the report ID of the generated HID input report (if any). If multiple
+ * reports are not sent via the given HID interface, this parameter should be ignored.
+ * \param[in] ReportType Type of HID report to generate, either \ref HID_REPORT_ITEM_In or \ref HID_REPORT_ITEM_Feature.
+ * \param[out] ReportData Pointer to a buffer where the generated HID report should be stored.
+ * \param[out] ReportSize Number of bytes in the generated input report, or zero if no report is to be sent.
+ *
+ * \return Boolean true to force the sending of the report even if it is identical to the previous report and still within
+ * the idle period (useful for devices which report relative movement), false otherwise.
+ */
+ bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo,
+ uint8_t* const ReportID,
+ const uint8_t ReportType,
+ void* ReportData,
+ uint16_t* const ReportSize) ATTR_NON_NULL_PTR_ARG(1)
+ ATTR_NON_NULL_PTR_ARG(2) ATTR_NON_NULL_PTR_ARG(4) ATTR_NON_NULL_PTR_ARG(5);
+
+ /** HID class driver callback for the user processing of a received HID OUT report. This callback may fire in response to
+ * either HID class control requests from the host, or by the normal HID endpoint polling procedure. Inside this callback
+ * the user is responsible for the processing of the received HID output report from the host.
+ *
+ * \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class configuration and state.
+ * \param[in] ReportID Report ID of the received output report. If multiple reports are not received via the given HID
+ * interface, this parameter should be ignored.
+ * \param[in] ReportType Type of received HID report, either \ref HID_REPORT_ITEM_Out or \ref HID_REPORT_ITEM_Feature.
+ * \param[in] ReportData Pointer to a buffer where the received HID report is stored.
+ * \param[in] ReportSize Size in bytes of the received report from the host.
+ */
+ void CALLBACK_HID_Device_ProcessHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo,
+ const uint8_t ReportID,
+ const uint8_t ReportType,
+ const void* ReportData,
+ const uint16_t ReportSize) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(4);
+
+ /* Inline Functions: */
+ /** Indicates that a millisecond of idle time has elapsed on the given HID interface, and the interface's idle count should be
+ * decremented. This should be called once per millisecond so that hardware key-repeats function correctly. It is recommended
+ * that this be called by the \ref EVENT_USB_Device_StartOfFrame() event, once SOF events have been enabled via
+ * \ref USB_Device_EnableSOFEvents().
+ *
+ * \param[in,out] HIDInterfaceInfo Pointer to a structure containing a HID Class configuration and state.
+ */
+ static inline void HID_Device_MillisecondElapsed(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo) ATTR_ALWAYS_INLINE ATTR_NON_NULL_PTR_ARG(1);
+ static inline void HID_Device_MillisecondElapsed(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo)
+ {
+ if (HIDInterfaceInfo->State.IdleMSRemaining)
+ HIDInterfaceInfo->State.IdleMSRemaining--;
+ }
+
+ /* Disable C linkage for C++ Compilers: */
+ #if defined(__cplusplus)
+ }
+ #endif
+
+#endif
+
+/** @} */
+
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