X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/4068efbd1898058854f9ca5a967bc5ad5a851759..7464e40a4ba3470c12001069bbe5f31db209dc4d:/LUFA/Drivers/USB/Class/Host/AndroidAccessoryClassHost.h?ds=sidebyside diff --git a/LUFA/Drivers/USB/Class/Host/AndroidAccessoryClassHost.h b/LUFA/Drivers/USB/Class/Host/AndroidAccessoryClassHost.h index 58bd98fe8..bcc76f923 100644 --- a/LUFA/Drivers/USB/Class/Host/AndroidAccessoryClassHost.h +++ b/LUFA/Drivers/USB/Class/Host/AndroidAccessoryClassHost.h @@ -1,320 +1,314 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2012. - - dean [at] fourwalledcubicle [dot] com - www.lufa-lib.org -*/ - -/* - Copyright 2012 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 Host mode driver for the library USB Android Open Accessory Class driver. - * - * Host mode driver for the library USB Android Open Accessory 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_USBClassAOA - * \defgroup Group_USBClassAndroidAccessoryHost Android Open Accessory 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/AndroidAccessoryClassHost.c (Makefile source module name: LUFA_SRC_USBCLASS) - * - * \section Sec_ModDescription Module Description - * Host Mode USB Class driver framework interface, for the Android Open Accessory USB Class driver. - * - * @{ - */ - -#ifndef __AOA_CLASS_HOST_H__ -#define __AOA_CLASS_HOST_H__ - - /* Includes: */ - #include "../../USB.h" - #include "../Common/AndroidAccessoryClassCommon.h" - - #include - - /* Enable C linkage for C++ Compilers: */ - #if defined(__cplusplus) - extern "C" { - #endif - - /* Preprocessor Checks: */ - #if !defined(__INCLUDE_FROM_AOA_DRIVER) - #error Do not include this file directly. Include LUFA/Drivers/USB.h instead. - #endif - - /* Public Interface - May be used in end-application: */ - /* Macros: */ - /** Error code for some Android Open Accessory Host functions, indicating a logical (and not hardware) error. */ - #define AOA_ERROR_LOGICAL_CMD_FAILED 0x80 - - /* Type Defines: */ - /** \brief Android Open Accessory Class Host Mode Configuration and State Structure. - * - * Class state structure. An instance of this structure should be made within the user application, - * and passed to each of the Android Open Accessory class driver functions as the \c AOAInterfaceInfo - * parameter. This stores each Android Open Accessory interface's configuration and state information. - */ - typedef struct - { - struct - { - uint8_t DataINPipeNumber; /**< Pipe number of the AOA interface's IN data pipe. */ - bool DataINPipeDoubleBank; /**< Indicates if the AOA interface's IN data pipe should use double banking. */ - - uint8_t DataOUTPipeNumber; /**< Pipe number of the AOA interface's OUT data pipe. */ - bool DataOUTPipeDoubleBank; /**< Indicates if the AOA interface's OUT data pipe should use double banking. */ - - char* PropertyStrings[AOA_STRING_TOTAL_STRINGS]; /**< Android Accessory property strings, sent to identify the accessory when the - * Android device is switched into Open Accessory mode. */ - } Config; /**< Config data for the USB class interface within the device. All elements in this section - * must 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 AOA_Host_ConfigurePipes() is called and the Host state machine is in the - * Configured state. - */ - uint8_t InterfaceNumber; /**< Interface index of the AOA interface within the attached device. */ - - uint16_t DataINPipeSize; /**< Size in bytes of the AOA interface's IN data pipe. */ - uint16_t DataOUTPipeSize; /**< Size in bytes of the AOA interface's OUT data pipe. */ - } State; /**< State data for the USB class interface within the device. All elements in this section - * may be set to initial values, but may also be ignored to default to sane values when - * the interface is enumerated. - */ - } USB_ClassInfo_AOA_Host_t; - - /* Enums: */ - /** Enum for the possible error codes returned by the \ref AOA_Host_ConfigurePipes() function. */ - enum AOA_Host_EnumerationFailure_ErrorCodes_t - { - AOA_ENUMERROR_NoError = 0, /**< Configuration Descriptor was processed successfully. */ - AOA_ENUMERROR_InvalidConfigDescriptor = 1, /**< The device returned an invalid Configuration Descriptor. */ - AOA_ENUMERROR_NoCompatibleInterfaceFound = 2, /**< A compatible Android Open Accessory interface was not found in the device's Configuration Descriptor. */ - AOA_ENUMERROR_PipeConfigurationFailed = 3, /**< One or more pipes for the specified interface could not be configured correctly. */ - }; - - /* Function Prototypes: */ - /** General management task for a given Android Open Accessory 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] AOAInterfaceInfo Pointer to a structure containing an Android Open Accessory Class host configuration and state. - */ - void AOA_Host_USBTask(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); - - /** Validates a device descriptor, to check if the device is a valid Android device, and if it is currently in Android Open Accessory mode. - * - * \param[in,out] AOAInterfaceInfo Pointer to a structure containing an AOA Class host configuration and state. - * \param[in] DeviceDescriptor Pointer a buffer containing the attached device's Device Descriptor. - * \param[out] NeedModeSwitch Pointer to a boolean where the mode switch requirement of the attached device is to be stored. - * - * \return Boolean \c true if the attached device is a valid Android device, \c false otherwise. - */ - bool AOA_Host_ValidateAccessoryDevice(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo, - const USB_Descriptor_Device_t* const DeviceDescriptor, - bool* const NeedModeSwitch) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2) ATTR_NON_NULL_PTR_ARG(3); - - /** Host interface configuration routine, to configure a given Android Open Accessory host interface instance using the Configuration - * Descriptor read from an attached USB device. This function automatically updates the given Android Open Accessory 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. - * - * \param[in,out] AOAInterfaceInfo Pointer to a structure containing an AOA Class host configuration and state. - * \param[in] ConfigDescriptorSize Length of the attached device's Configuration Descriptor. - * \param[in] ConfigDescriptorData Pointer to a buffer containing the attached device's Configuration Descriptor. - * - * \return A value from the \ref AOA_Host_EnumerationFailure_ErrorCodes_t enum. - */ - uint8_t AOA_Host_ConfigurePipes(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo, - uint16_t ConfigDescriptorSize, - void* ConfigDescriptorData) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(3); - - /** Starts Accessory Mode in the attached Android device. This function will validate the device's Android Open Accessory protocol - * version, send the configured property strings, and request a switch to Android Open Accessory mode. - * - * \param[in,out] AOAInterfaceInfo Pointer to a structure containing an AOA Class host configuration and state. - * - * \return A value from the \ref USB_Host_SendControlErrorCodes_t enum, or \ref AOA_ERROR_LOGICAL_CMD_FAILED if a logical error occured.. - */ - uint8_t AOA_Host_StartAccessoryMode(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); - - /** Sends a given data buffer to the attached USB device, if connected. If a device is not connected when the function is - * called, the data will be discarded. Bytes will be queued for transmission to the device until either the pipe bank - * becomes full, or the \ref AOA_Host_Flush() function is called to flush the pending data to the device. This allows for - * multiple bytes to be packed into a single pipe packet, increasing data throughput. - * - * \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the - * call will fail. - * - * \param[in,out] AOAInterfaceInfo Pointer to a structure containing a AOA Class host configuration and state. - * \param[in] Buffer Pointer to a buffer containing the data to send to the device. - * \param[in] Length Length of the data to send to the device. - * - * \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum. - */ - uint8_t AOA_Host_SendData(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo, - const uint8_t* const Buffer, - const uint16_t Length); - - /** Sends a given null-terminated string to the attached USB device, if connected. If a device is not connected when the - * function is called, the string is discarded. Bytes will be queued for transmission to the device until either the pipe - * bank becomes full, or the \ref AOA_Host_Flush() function is called to flush the pending data to the device. This allows - * for multiple bytes to be packed into a single pipe packet, increasing data throughput. - * - * \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the - * call will fail. - * - * \param[in,out] AOAInterfaceInfo Pointer to a structure containing a AOA Class host configuration and state. - * \param[in] String Pointer to the null terminated string to send to the device. - * - * \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum. - */ - uint8_t AOA_Host_SendString(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo, - const char* const String) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2); - - /** Sends a given byte to the attached USB device, if connected. If a device is not connected when the function is called, the - * byte is discarded. Bytes will be queued for transmission to the device until either the pipe bank becomes full, or the - * \ref AOA_Host_Flush() function is called to flush the pending data to the host. This allows for multiple bytes to be - * packed into a single pipe packet, increasing data throughput. - * - * \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the - * call will fail. - * - * \param[in,out] AOAInterfaceInfo Pointer to a structure containing a AOA Class host configuration and state. - * \param[in] Data Byte of data to send to the device. - * - * \return A value from the \ref Pipe_WaitUntilReady_ErrorCodes_t enum. - */ - uint8_t AOA_Host_SendByte(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo, - const uint8_t Data) ATTR_NON_NULL_PTR_ARG(1); - - /** Determines the number of bytes received by the AOA interface from the device, waiting to be read. This indicates the number - * of bytes in the IN pipe bank only, and thus the number of calls to \ref AOA_Host_ReceiveByte() which are guaranteed to succeed - * immediately. If multiple bytes are to be received, they should be buffered by the user application, as the pipe bank will not be - * released back to the USB controller until all bytes are read. - * - * \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the - * call will fail. - * - * \param[in,out] AOAInterfaceInfo Pointer to a structure containing a AOA Class host configuration and state. - * - * \return Total number of buffered bytes received from the device. - */ - uint16_t AOA_Host_BytesReceived(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); - - /** Reads a byte of data from the device. If no data is waiting to be read of if a USB device is not connected, the function - * returns a negative value. The \ref AOA_Host_BytesReceived() function may be queried in advance to determine how many bytes - * are currently buffered in the AOA interface's data receive pipe. - * - * \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the - * call will fail. - * - * \param[in,out] AOAInterfaceInfo Pointer to a structure containing a AOA Class host configuration and state. - * - * \return Next received byte from the device, or a negative value if no data received. - */ - int16_t AOA_Host_ReceiveByte(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); - - /** Flushes any data waiting to be sent, ensuring that the send buffer is cleared. - * - * \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the - * call will fail. - * - * \param[in,out] AOAInterfaceInfo Pointer to a structure containing a AOA Class host configuration and state. - * - * \return A value from the \ref Pipe_WaitUntilReady_ErrorCodes_t enum. - */ - uint8_t AOA_Host_Flush(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); - - /** Creates a standard character stream for the given AOA Device instance so that it can be used with all the regular - * functions in the standard \c library that accept a \c FILE stream as a destination (e.g. \c fprintf). The created - * stream is bidirectional and can be used for both input and output functions. - * - * Reading data from this stream is non-blocking, i.e. in most instances, complete strings cannot be read in by a single - * fetch, as the endpoint will not be ready at some point in the transmission, aborting the transfer. However, this may - * be used when the read data is processed byte-per-bye (via \c getc()) or when the user application will implement its own - * line buffering. - * - * \note The created stream can be given as stdout if desired to direct the standard output from all \c functions - * to the given AOA interface. - * \n\n - * - * \note This function is not available on all microcontroller architectures. - * - * \param[in,out] AOAInterfaceInfo Pointer to a structure containing a AOA Class configuration and state. - * \param[in,out] Stream Pointer to a FILE structure where the created stream should be placed. - */ - void AOA_Host_CreateStream(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo, - FILE* const Stream); - - /** Identical to \ref AOA_Host_CreateStream(), except that reads are blocking until the calling stream function terminates - * the transfer. While blocking, the USB and AOA service tasks are called repeatedly to maintain USB communications. - * - * \note This function is not available on all microcontroller architectures. - * - * \param[in,out] AOAInterfaceInfo Pointer to a structure containing a AOA Class configuration and state. - * \param[in,out] Stream Pointer to a FILE structure where the created stream should be placed. - */ - void AOA_Host_CreateBlockingStream(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo, - FILE* const Stream); - - /* Private Interface - For use in library only: */ - #if !defined(__DOXYGEN__) - /* Function Prototypes: */ - #if defined(__INCLUDE_FROM_ANDROIDACCESSORY_HOST_C) - #if defined(FDEV_SETUP_STREAM) - static int AOA_Host_putchar(char c, - FILE* Stream) ATTR_NON_NULL_PTR_ARG(2); - static int AOA_Host_getchar(FILE* Stream) ATTR_NON_NULL_PTR_ARG(1); - static int AOA_Host_getchar_Blocking(FILE* Stream) ATTR_NON_NULL_PTR_ARG(1); - #endif - - static uint8_t AOA_Host_GetAccessoryProtocol(uint16_t* const Protocol) ATTR_NON_NULL_PTR_ARG(1); - static uint8_t AOA_Host_SendPropertyString(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo, - const uint8_t StringIndex) ATTR_NON_NULL_PTR_ARG(1); - - static uint8_t DCOMP_AOA_Host_NextAndroidAccessoryInterface(void* const CurrentDescriptor) - ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1); - static uint8_t DCOMP_AOA_Host_NextInterfaceBulkEndpoint(void* const CurrentDescriptor) - ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1); - #endif - #endif - - /* Disable C linkage for C++ Compilers: */ - #if defined(__cplusplus) - } - #endif - -#endif - -/** @} */ - +/* + LUFA Library + Copyright (C) Dean Camera, 2013. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2013 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 Host mode driver for the library USB Android Open Accessory Class driver. + * + * Host mode driver for the library USB Android Open Accessory 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_USBClassAOA + * \defgroup Group_USBClassAndroidAccessoryHost Android Open Accessory 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/AndroidAccessoryClassHost.c (Makefile source module name: LUFA_SRC_USBCLASS) + * + * \section Sec_ModDescription Module Description + * Host Mode USB Class driver framework interface, for the Android Open Accessory USB Class driver. + * + * @{ + */ + +#ifndef __AOA_CLASS_HOST_H__ +#define __AOA_CLASS_HOST_H__ + + /* Includes: */ + #include "../../USB.h" + #include "../Common/AndroidAccessoryClassCommon.h" + + #include + + /* Enable C linkage for C++ Compilers: */ + #if defined(__cplusplus) + extern "C" { + #endif + + /* Preprocessor Checks: */ + #if !defined(__INCLUDE_FROM_AOA_DRIVER) + #error Do not include this file directly. Include LUFA/Drivers/USB.h instead. + #endif + + /* Public Interface - May be used in end-application: */ + /* Macros: */ + /** Error code for some Android Open Accessory Host functions, indicating a logical (and not hardware) error. */ + #define AOA_ERROR_LOGICAL_CMD_FAILED 0x80 + + /* Type Defines: */ + /** \brief Android Open Accessory Class Host Mode Configuration and State Structure. + * + * Class state structure. An instance of this structure should be made within the user application, + * and passed to each of the Android Open Accessory class driver functions as the \c AOAInterfaceInfo + * parameter. This stores each Android Open Accessory interface's configuration and state information. + */ + typedef struct + { + struct + { + USB_Pipe_Table_t DataINPipe; /**< Data IN Pipe configuration table. */ + USB_Pipe_Table_t DataOUTPipe; /**< Data OUT Pipe configuration table. */ + + char* PropertyStrings[AOA_STRING_TOTAL_STRINGS]; /**< Android Accessory property strings, sent to identify the accessory when the + * Android device is switched into Open Accessory mode. */ + } Config; /**< Config data for the USB class interface within the device. All elements in this section + * must 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 AOA_Host_ConfigurePipes() is called and the Host state machine is in the + * Configured state. + */ + uint8_t InterfaceNumber; /**< Interface index of the AOA interface within the attached device. */ + } State; /**< State data for the USB class interface within the device. All elements in this section + * may be set to initial values, but may also be ignored to default to sane values when + * the interface is enumerated. + */ + } USB_ClassInfo_AOA_Host_t; + + /* Enums: */ + /** Enum for the possible error codes returned by the \ref AOA_Host_ConfigurePipes() function. */ + enum AOA_Host_EnumerationFailure_ErrorCodes_t + { + AOA_ENUMERROR_NoError = 0, /**< Configuration Descriptor was processed successfully. */ + AOA_ENUMERROR_InvalidConfigDescriptor = 1, /**< The device returned an invalid Configuration Descriptor. */ + AOA_ENUMERROR_NoCompatibleInterfaceFound = 2, /**< A compatible Android Open Accessory interface was not found in the device's Configuration Descriptor. */ + AOA_ENUMERROR_PipeConfigurationFailed = 3, /**< One or more pipes for the specified interface could not be configured correctly. */ + }; + + /* Function Prototypes: */ + /** General management task for a given Android Open Accessory 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] AOAInterfaceInfo Pointer to a structure containing an Android Open Accessory Class host configuration and state. + */ + void AOA_Host_USBTask(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); + + /** Validates a device descriptor, to check if the device is a valid Android device, and if it is currently in Android Open Accessory mode. + * + * \param[in,out] AOAInterfaceInfo Pointer to a structure containing an AOA Class host configuration and state. + * \param[in] DeviceDescriptor Pointer a buffer containing the attached device's Device Descriptor. + * \param[out] NeedModeSwitch Pointer to a boolean where the mode switch requirement of the attached device is to be stored. + * + * \return Boolean \c true if the attached device is a valid Android device, \c false otherwise. + */ + bool AOA_Host_ValidateAccessoryDevice(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo, + const USB_Descriptor_Device_t* const DeviceDescriptor, + bool* const NeedModeSwitch) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2) ATTR_NON_NULL_PTR_ARG(3); + + /** Host interface configuration routine, to configure a given Android Open Accessory host interface instance using the Configuration + * Descriptor read from an attached USB device. This function automatically updates the given Android Open Accessory 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. + * + * \param[in,out] AOAInterfaceInfo Pointer to a structure containing an AOA Class host configuration and state. + * \param[in] ConfigDescriptorSize Length of the attached device's Configuration Descriptor. + * \param[in] ConfigDescriptorData Pointer to a buffer containing the attached device's Configuration Descriptor. + * + * \return A value from the \ref AOA_Host_EnumerationFailure_ErrorCodes_t enum. + */ + uint8_t AOA_Host_ConfigurePipes(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo, + uint16_t ConfigDescriptorSize, + void* ConfigDescriptorData) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(3); + + /** Starts Accessory Mode in the attached Android device. This function will validate the device's Android Open Accessory protocol + * version, send the configured property strings, and request a switch to Android Open Accessory mode. + * + * \param[in,out] AOAInterfaceInfo Pointer to a structure containing an AOA Class host configuration and state. + * + * \return A value from the \ref USB_Host_SendControlErrorCodes_t enum, or \ref AOA_ERROR_LOGICAL_CMD_FAILED if a logical error occurred.. + */ + uint8_t AOA_Host_StartAccessoryMode(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); + + /** Sends a given data buffer to the attached USB device, if connected. If a device is not connected when the function is + * called, the data will be discarded. Bytes will be queued for transmission to the device until either the pipe bank + * becomes full, or the \ref AOA_Host_Flush() function is called to flush the pending data to the device. This allows for + * multiple bytes to be packed into a single pipe packet, increasing data throughput. + * + * \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the + * call will fail. + * + * \param[in,out] AOAInterfaceInfo Pointer to a structure containing a AOA Class host configuration and state. + * \param[in] Buffer Pointer to a buffer containing the data to send to the device. + * \param[in] Length Length of the data to send to the device. + * + * \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum. + */ + uint8_t AOA_Host_SendData(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo, + const void* const Buffer, + const uint16_t Length) ATTR_NON_NULL_PTR_ARG(1); + + /** Sends a given null-terminated string to the attached USB device, if connected. If a device is not connected when the + * function is called, the string is discarded. Bytes will be queued for transmission to the device until either the pipe + * bank becomes full, or the \ref AOA_Host_Flush() function is called to flush the pending data to the device. This allows + * for multiple bytes to be packed into a single pipe packet, increasing data throughput. + * + * \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the + * call will fail. + * + * \param[in,out] AOAInterfaceInfo Pointer to a structure containing a AOA Class host configuration and state. + * \param[in] String Pointer to the null terminated string to send to the device. + * + * \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum. + */ + uint8_t AOA_Host_SendString(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo, + const char* const String) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2); + + /** Sends a given byte to the attached USB device, if connected. If a device is not connected when the function is called, the + * byte is discarded. Bytes will be queued for transmission to the device until either the pipe bank becomes full, or the + * \ref AOA_Host_Flush() function is called to flush the pending data to the host. This allows for multiple bytes to be + * packed into a single pipe packet, increasing data throughput. + * + * \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the + * call will fail. + * + * \param[in,out] AOAInterfaceInfo Pointer to a structure containing a AOA Class host configuration and state. + * \param[in] Data Byte of data to send to the device. + * + * \return A value from the \ref Pipe_WaitUntilReady_ErrorCodes_t enum. + */ + uint8_t AOA_Host_SendByte(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo, + const uint8_t Data) ATTR_NON_NULL_PTR_ARG(1); + + /** Determines the number of bytes received by the AOA interface from the device, waiting to be read. This indicates the number + * of bytes in the IN pipe bank only, and thus the number of calls to \ref AOA_Host_ReceiveByte() which are guaranteed to succeed + * immediately. If multiple bytes are to be received, they should be buffered by the user application, as the pipe bank will not be + * released back to the USB controller until all bytes are read. + * + * \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the + * call will fail. + * + * \param[in,out] AOAInterfaceInfo Pointer to a structure containing a AOA Class host configuration and state. + * + * \return Total number of buffered bytes received from the device. + */ + uint16_t AOA_Host_BytesReceived(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); + + /** Reads a byte of data from the device. If no data is waiting to be read of if a USB device is not connected, the function + * returns a negative value. The \ref AOA_Host_BytesReceived() function may be queried in advance to determine how many bytes + * are currently buffered in the AOA interface's data receive pipe. + * + * \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the + * call will fail. + * + * \param[in,out] AOAInterfaceInfo Pointer to a structure containing a AOA Class host configuration and state. + * + * \return Next received byte from the device, or a negative value if no data received. + */ + int16_t AOA_Host_ReceiveByte(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); + + /** Flushes any data waiting to be sent, ensuring that the send buffer is cleared. + * + * \pre This function must only be called when the Host state machine is in the \ref HOST_STATE_Configured state or the + * call will fail. + * + * \param[in,out] AOAInterfaceInfo Pointer to a structure containing a AOA Class host configuration and state. + * + * \return A value from the \ref Pipe_WaitUntilReady_ErrorCodes_t enum. + */ + uint8_t AOA_Host_Flush(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo) ATTR_NON_NULL_PTR_ARG(1); + + /** Creates a standard character stream for the given AOA Device instance so that it can be used with all the regular + * functions in the standard \c library that accept a \c FILE stream as a destination (e.g. \c fprintf). The created + * stream is bidirectional and can be used for both input and output functions. + * + * Reading data from this stream is non-blocking, i.e. in most instances, complete strings cannot be read in by a single + * fetch, as the endpoint will not be ready at some point in the transmission, aborting the transfer. However, this may + * be used when the read data is processed byte-per-bye (via \c getc()) or when the user application will implement its own + * line buffering. + * + * \note The created stream can be given as \c stdout if desired to direct the standard output from all \c functions + * to the given AOA interface. + * \n\n + * + * \note This function is not available on all microcontroller architectures. + * + * \param[in,out] AOAInterfaceInfo Pointer to a structure containing a AOA Class configuration and state. + * \param[in,out] Stream Pointer to a FILE structure where the created stream should be placed. + */ + void AOA_Host_CreateStream(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo, + FILE* const Stream) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2); + + /** Identical to \ref AOA_Host_CreateStream(), except that reads are blocking until the calling stream function terminates + * the transfer. While blocking, the USB and AOA service tasks are called repeatedly to maintain USB communications. + * + * \note This function is not available on all microcontroller architectures. + * + * \param[in,out] AOAInterfaceInfo Pointer to a structure containing a AOA Class configuration and state. + * \param[in,out] Stream Pointer to a FILE structure where the created stream should be placed. + */ + void AOA_Host_CreateBlockingStream(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo, + FILE* const Stream) ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2); + + /* Private Interface - For use in library only: */ + #if !defined(__DOXYGEN__) + /* Function Prototypes: */ + #if defined(__INCLUDE_FROM_ANDROIDACCESSORY_HOST_C) + #if defined(FDEV_SETUP_STREAM) + static int AOA_Host_putchar(char c, + FILE* Stream) ATTR_NON_NULL_PTR_ARG(2); + static int AOA_Host_getchar(FILE* Stream) ATTR_NON_NULL_PTR_ARG(1); + static int AOA_Host_getchar_Blocking(FILE* Stream) ATTR_NON_NULL_PTR_ARG(1); + #endif + + static uint8_t AOA_Host_GetAccessoryProtocol(uint16_t* const Protocol) ATTR_NON_NULL_PTR_ARG(1); + static uint8_t AOA_Host_SendPropertyString(USB_ClassInfo_AOA_Host_t* const AOAInterfaceInfo, + const uint8_t StringIndex) ATTR_NON_NULL_PTR_ARG(1); + + static uint8_t DCOMP_AOA_Host_NextAndroidAccessoryInterface(void* const CurrentDescriptor) + ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1); + static uint8_t DCOMP_AOA_Host_NextInterfaceBulkEndpoint(void* const CurrentDescriptor) + ATTR_WARN_UNUSED_RESULT ATTR_NON_NULL_PTR_ARG(1); + #endif + #endif + + /* Disable C linkage for C++ Compilers: */ + #if defined(__cplusplus) + } + #endif + +#endif + +/** @} */ +