176 lines
8.1 KiB
C
176 lines
8.1 KiB
C
/*
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LUFA Library
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Copyright (C) Dean Camera, 2019.
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dean [at] fourwalledcubicle [dot] com
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www.lufa-lib.org
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*/
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/*
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Copyright 2019 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all 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 disclaims 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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/** \file
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* \brief Device mode driver for the library USB MIDI Class driver.
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*
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* Device mode driver for the library USB MIDI Class driver.
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*
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* \note This file should not be included directly. It is automatically included as needed by the USB module driver
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* dispatch header located in LUFA/Drivers/USB.h.
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*/
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/** \ingroup Group_USBClassMIDI
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* \defgroup Group_USBClassMIDIDevice MIDI Class Device Mode Driver
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*
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* \section Sec_USBClassMIDIDevice_Dependencies Module Source Dependencies
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* The following files must be built with any user project that uses this module:
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* - LUFA/Drivers/USB/Class/Device/MIDIClassDevice.c <i>(Makefile source module name: LUFA_SRC_USBCLASS)</i>
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*
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* \section Sec_USBClassMIDIDevice_ModDescription Module Description
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* Device Mode USB Class driver framework interface, for the MIDI USB Class driver.
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*
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* @{
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*/
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#ifndef _MIDI_CLASS_DEVICE_H_
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#define _MIDI_CLASS_DEVICE_H_
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/* Includes: */
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#include "../../USB.h"
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#include "../Common/MIDIClassCommon.h"
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/* Enable C linkage for C++ Compilers: */
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/* Preprocessor Checks: */
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#if !defined(__INCLUDE_FROM_MIDI_DRIVER)
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#error Do not include this file directly. Include LUFA/Drivers/USB.h instead.
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#endif
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/* Public Interface - May be used in end-application: */
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/* Type Define: */
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/** \brief MIDI Class Device Mode Configuration and State Structure.
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*
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* Class state structure. An instance of this structure should be made for each MIDI interface
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* within the user application, and passed to each of the MIDI class driver functions as the
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* \c MIDIInterfaceInfo parameter. This stores each MIDI interface's configuration and state information.
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*/
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typedef struct
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{
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struct
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{
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uint8_t StreamingInterfaceNumber; /**< Index of the Audio Streaming interface within the device this structure controls. */
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USB_Endpoint_Table_t DataINEndpoint; /**< Data IN endpoint configuration table. */
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USB_Endpoint_Table_t DataOUTEndpoint; /**< Data OUT endpoint configuration table. */
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} Config; /**< Config data for the USB class interface within the device. All elements in this section
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* <b>must</b> be set or the interface will fail to enumerate and operate correctly.
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*/
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struct
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{
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uint8_t RESERVED; // No state information for this class
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} State; /**< State data for the USB class interface within the device. All elements in this section
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* are reset to their defaults when the interface is enumerated.
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*/
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} USB_ClassInfo_MIDI_Device_t;
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/* Function Prototypes: */
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/** Configures the endpoints of a given MIDI interface, ready for use. This should be linked to the library
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* \ref EVENT_USB_Device_ConfigurationChanged() event so that the endpoints are configured when the configuration
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* containing the given MIDI interface is selected.
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*
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* \param[in,out] MIDIInterfaceInfo Pointer to a structure containing a MIDI Class configuration and state.
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*
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* \return Boolean \c true if the endpoints were successfully configured, \c false otherwise.
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*/
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bool MIDI_Device_ConfigureEndpoints(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
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/** General management task for a given MIDI class interface, required for the correct operation of the interface. This should
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* be called frequently in the main program loop, before the master USB management task \ref USB_USBTask().
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*
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* \param[in,out] MIDIInterfaceInfo Pointer to a structure containing a MIDI Class configuration and state.
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*/
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void MIDI_Device_USBTask(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
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/** Sends a MIDI event packet to the host. If no host is connected, the event packet is discarded. Events are queued into the
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* endpoint bank until either the endpoint bank is full, or \ref MIDI_Device_Flush() is called. This allows for multiple
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* MIDI events to be packed into a single endpoint packet, increasing data throughput.
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*
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* \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
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* call will fail.
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*
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* \param[in,out] MIDIInterfaceInfo Pointer to a structure containing a MIDI Class configuration and state.
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* \param[in] Event Pointer to a populated \ref MIDI_EventPacket_t structure containing the MIDI event to send.
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*
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* \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
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*/
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uint8_t MIDI_Device_SendEventPacket(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo,
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const MIDI_EventPacket_t* const Event) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
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/** Flushes the MIDI send buffer, sending any queued MIDI events to the host. This should be called to override the
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* \ref MIDI_Device_SendEventPacket() function's packing behavior, to flush queued events.
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*
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* \param[in,out] MIDIInterfaceInfo Pointer to a structure containing a MIDI Class configuration and state.
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*
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* \return A value from the \ref Endpoint_WaitUntilReady_ErrorCodes_t enum.
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*/
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uint8_t MIDI_Device_Flush(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
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/** Receives a MIDI event packet from the host. Events are unpacked from the endpoint, thus if the endpoint bank contains
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* multiple MIDI events from the host in the one packet, multiple calls to this function will return each individual event.
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*
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* \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the
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* call will fail.
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*
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* \param[in,out] MIDIInterfaceInfo Pointer to a structure containing a MIDI Class configuration and state.
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* \param[out] Event Pointer to a USB_MIDI_EventPacket_t structure where the received MIDI event is to be placed.
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*
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* \return Boolean \c true if a MIDI event packet was received, \c false otherwise.
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*/
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bool MIDI_Device_ReceiveEventPacket(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo,
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MIDI_EventPacket_t* const Event) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2);
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/* Inline Functions: */
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/** Processes incoming control requests from the host, that are directed to the given MIDI class interface. This should be
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* linked to the library \ref EVENT_USB_Device_ControlRequest() event.
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*
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* \param[in,out] MIDIInterfaceInfo Pointer to a structure containing a MIDI Class configuration and state.
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*/
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static inline void MIDI_Device_ProcessControlRequest(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1);
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static inline void MIDI_Device_ProcessControlRequest(USB_ClassInfo_MIDI_Device_t* const MIDIInterfaceInfo)
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{
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(void)MIDIInterfaceInfo;
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}
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/* Disable C linkage for C++ Compilers: */
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#if defined(__cplusplus)
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}
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#endif
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#endif
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/** @} */
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