LUFA/Drivers/USB/LowLevel/Endpoint.h

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2009.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, and distribute this software
  13   and its documentation for any purpose and without fee is hereby
  14   granted, provided that the above copyright notice appear in all
  15   copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /** \ingroup Group_USB
  32  *  @defgroup Group_EndpointManagement Endpoint Management
  33  *
  34  *  Functions, macros and enums related to endpoint management when in USB Device mode. This
  35  *  module contains the endpoint management macros, as well as endpoint interrupt and data
  36  *  send/recieve functions for various data types.
  37  *
  38  *  @{
  39  */
  40
  41 /** @defgroup Group_EndpointRW Endpoint Data Reading and Writing
  42  *
  43  *  Functions, macros, variables, enums and types related to data reading and writing from and to endpoints.
  44  */
  45
  46 /** @defgroup Group_EndpointPacketManagement Endpoint Packet Management
  47  *
  48  *  Functions, macros, variables, enums and types related to packet management of endpoints.
  49  */
  50
  51 #ifndef __ENDPOINT_H__
  52 #define __ENDPOINT_H__
  53
  54         /* Includes: */
  55                 #include <avr/io.h>
  56                 #include <stdbool.h>
  57
  58                 #include "../../../Common/Common.h"
  59                 #include "../HighLevel/USBTask.h"
  60
  61                 #if !defined(NO_STREAM_CALLBACKS) || defined(__DOXYGEN__)
  62                         #include "../HighLevel/StreamCallbacks.h"
  63                 #endif
  64
  65         /* Enable C linkage for C++ Compilers: */
  66                 #if defined(__cplusplus)
  67                         extern "C" {
  68                 #endif
  69
  70         /* Public Interface - May be used in end-application: */
  71                 /* Macros: */
  72                         /** Endpoint data direction mask for \ref Endpoint_ConfigureEndpoint(). This indicates that the endpoint
  73                          *  should be initialized in the OUT direction - i.e. data flows from host to device.
  74                          */
  75                         #define ENDPOINT_DIR_OUT                      (0 << EPDIR)
  76
  77                         /** Endpoint data direction mask for \ref Endpoint_ConfigureEndpoint(). This indicates that the endpoint
  78                          *  should be initialized in the IN direction - i.e. data flows from device to host.
  79                          */
  80                         #define ENDPOINT_DIR_IN                       (1 << EPDIR)
  81
  82                         /** Mask for the bank mode selection for the \ref Endpoint_ConfigureEndpoint() macro. This indicates
  83                          *  that the endpoint should have one single bank, which requires less USB FIFO memory but results
  84                          *  in slower transfers as only one USB device (the AVR or the host) can access the endpoint's
  85                          *  bank at the one time.
  86                          */
  87                         #define ENDPOINT_BANK_SINGLE                  (0 << EPBK0)
  88
  89                         /** Mask for the bank mode selection for the \ref Endpoint_ConfigureEndpoint() macro. This indicates
  90                          *  that the endpoint should have two banks, which requires more USB FIFO memory but results
  91                          *  in faster transfers as one USB device (the AVR or the host) can access one bank while the other
  92                          *  accesses the second bank.
  93                          */
  94                         #define ENDPOINT_BANK_DOUBLE                  (1 << EPBK0)
  95
  96                         /** Endpoint address for the default control endpoint, which always resides in address 0. This is
  97                          *  defined for convenience to give more readable code when used with the endpoint macros.
  98                          */
  99                         #define ENDPOINT_CONTROLEP                    0
 100
 101                         #if (!defined(FIXED_CONTROL_ENDPOINT_SIZE) || defined(__DOXYGEN__))
 102                                 /** Default size of the default control endpoint's bank, until altered by the Endpoint0Size value
 103                                  *  in the device descriptor. Not available if the FIXED_CONTROL_ENDPOINT_SIZE token is defined.
 104                                  */
 105                                 #define ENDPOINT_CONTROLEP_DEFAULT_SIZE   8
 106                         #endif
 107
 108                         /** Endpoint number mask, for masking against endpoint addresses to retrieve the endpoint's
 109                          *  numerical address in the device.
 110                          */
 111                         #define ENDPOINT_EPNUM_MASK                   0x07
 112
 113                         /** Endpoint bank size mask, for masking against endpoint addresses to retrieve the endpoint's
 114                          *  bank size in the device.
 115                          */
 116                         #define ENDPOINT_EPSIZE_MASK                  0x7FF
 117
 118                         /** Maximum size in bytes of a given endpoint.
 119                          *
 120                          *  \param n  Endpoint number, a value between 0 and (ENDPOINT_TOTAL_ENDPOINTS - 1)
 121                          */
 122                         #define ENDPOINT_MAX_SIZE(n)                  _ENDPOINT_GET_MAXSIZE(n)
 123
 124                         /** Indicates if the given endpoint supports double banking.
 125                          *
 126                          *  \param n  Endpoint number, a value between 0 and (ENDPOINT_TOTAL_ENDPOINTS - 1)
 127                          */
 128                         #define ENDPOINT_DOUBLEBANK_SUPPORTED(n)      _ENDPOINT_GET_DOUBLEBANK(n)
 129
 130                         #if !defined(CONTROL_ONLY_DEVICE)
 131                                 #if defined(USB_FULL_CONTROLLER) || defined(USB_MODIFIED_FULL_CONTROLLER) || defined(__DOXYGEN__)
 132                                         /** Total number of endpoints (including the default control endpoint at address 0) which may
 133                                          *  be used in the device. Different USB AVR models support different amounts of endpoints,
 134                                          *  this value reflects the maximum number of endpoints for the currently selected AVR model.
 135                                          */
 136                                         #define ENDPOINT_TOTAL_ENDPOINTS          7
 137                                 #else
 138                                         #define ENDPOINT_TOTAL_ENDPOINTS          5
 139                                 #endif
 140                         #else
 141                                 #define ENDPOINT_TOTAL_ENDPOINTS              1
 142                         #endif
 143
 144                 /* Pseudo-Function Macros: */
 145                         #if defined(__DOXYGEN__)
 146                                 /** Indicates the number of bytes currently stored in the current endpoint's selected bank.
 147                                  *
 148                                  *  \note The return width of this function may differ, depending on the maximum endpoint bank size
 149                                  *        of the selected AVR model.
 150                                  *
 151                                  *  \ingroup Group_EndpointRW
 152                                  *
 153                                  *  \return Total number of bytes in the currently selected Endpoint's FIFO buffer
 154                                  */
 155                                 static inline uint16_t Endpoint_BytesInEndpoint(void);
 156
 157                                 /** Get the endpoint address of the currently selected endpoint. This is typically used to save
 158                                  *  the currently selected endpoint number so that it can be restored after another endpoint has
 159                                  *  been manipulated.
 160                                  *
 161                                  *  \return Index of the currently selected endpoint
 162                                  */
 163                                 static inline uint8_t Endpoint_GetCurrentEndpoint(void);
 164
 165                                 /** Selects the given endpoint number. If the address from the device descriptors is used, the
 166                                  *  value should be masked with the \ref ENDPOINT_EPNUM_MASK constant to extract only the endpoint
 167                                  *  number (and discarding the endpoint direction bit).
 168                                  *
 169                                  *  Any endpoint operations which do not require the endpoint number to be indicated will operate on
 170                                  *  the currently selected endpoint.
 171                                  *
 172                                  *  \param EndpointNumber Endpoint number to select
 173                                  */
 174                                 static inline void Endpoint_SelectEndpoint(uint8_t EndpointNumber);
 175
 176                                 /** Resets the endpoint bank FIFO. This clears all the endpoint banks and resets the USB controller's
 177                                  *  In and Out pointers to the bank's contents.
 178                                  *
 179                                  *  \param EndpointNumber Endpoint number whose FIFO buffers are to be reset
 180                                  */
 181                                 static inline void Endpoint_ResetFIFO(uint8_t EndpointNumber);
 182
 183                                 /** Enables the currently selected endpoint so that data can be sent and received through it to
 184                                  *  and from a host.
 185                                  *
 186                                  *  \note Endpoints must first be configured properly via \ref Endpoint_ConfigureEndpoint().
 187                                  */
 188                                 static inline void Endpoint_EnableEndpoint(void);
 189
 190                                 /** Disables the currently selected endpoint so that data cannot be sent and received through it
 191                                  *  to and from a host.
 192                                  */
 193                                 static inline void Endpoint_DisableEndpoint(void);
 194
 195                                 /** Determines if the currently selected endpoint is enabled, but not necessarily configured.
 196                                  *
 197                                  * \return Boolean True if the currently selected endpoint is enabled, false otherwise
 198                                  */
 199                                 static inline bool Endpoint_IsEnabled(void);
 200
 201                                 /** Determines if the currently selected endpoint may be read from (if data is waiting in the endpoint
 202                                  *  bank and the endpoint is an OUT direction, or if the bank is not yet full if the endpoint is an IN
 203                                  *  direction). This function will return false if an error has occurred in the endpoint, if the endpoint
 204                                  *  is an OUT direction and no packet (or an empty packet) has been received, or if the endpoint is an IN
 205                                  *  direction and the endpoint bank is full.
 206                                  *
 207                                  *  \ingroup Group_EndpointPacketManagement
 208                                  *
 209                                  *  \return Boolean true if the currently selected endpoint may be read from or written to, depending on its direction
 210                                  */
 211                                 static inline bool Endpoint_IsReadWriteAllowed(void);
 212
 213                                 /** Determines if the currently selected endpoint is configured.
 214                                  *
 215                                  *  \return Boolean true if the currently selected endpoint has been configured, false otherwise
 216                                  */
 217                                 static inline bool Endpoint_IsConfigured(void);
 218
 219                                 /** Returns a mask indicating which INTERRUPT type endpoints have interrupted - i.e. their
 220                                  *  interrupt duration has elapsed. Which endpoints have interrupted can be determined by
 221                                  *  masking the return value against (1 << {Endpoint Number}).
 222                                  *
 223                                  *  \return Mask whose bits indicate which endpoints have interrupted
 224                                  */
 225                                 static inline uint8_t Endpoint_GetEndpointInterrupts(void);
 226
 227                                 /** Determines if the specified endpoint number has interrupted (valid only for INTERRUPT type
 228                                  *  endpoints).
 229                                  *
 230                                  *  \param EndpointNumber  Index of the endpoint whose interrupt flag should be tested
 231                                  *
 232                                  *  \return Boolean true if the specified endpoint has interrupted, false otherwise
 233                                  */
 234                                 static inline bool Endpoint_HasEndpointInterrupted(uint8_t EndpointNumber);
 235
 236                                 /** Determines if the selected IN endpoint is ready for a new packet.
 237                                  *
 238                                  *  \ingroup Group_EndpointPacketManagement
 239                                  *
 240                                  *  \return Boolean true if the current endpoint is ready for an IN packet, false otherwise.
 241                                  */
 242                                 static inline bool Endpoint_IsINReady(void);
 243
 244                                 /** Determines if the selected OUT endpoint has received new packet.
 245                                  *
 246                                  *  \ingroup Group_EndpointPacketManagement
 247                                  *
 248                                  *  \return Boolean true if current endpoint is has received an OUT packet, false otherwise.
 249                                  */
 250                                 static inline bool Endpoint_IsOUTReceived(void);
 251
 252                                 /** Determines if the current CONTROL type endpoint has received a SETUP packet.
 253                                  *
 254                                  *  \ingroup Group_EndpointPacketManagement
 255                                  *
 256                                  *  \return Boolean true if the selected endpoint has received a SETUP packet, false otherwise.
 257                                  */
 258                                 static inline bool Endpoint_IsSETUPReceived(void);
 259
 260                                 /** Clears a received SETUP packet on the currently selected CONTROL type endpoint, freeing up the
 261                                  *  endpoint for the next packet.
 262                                  *
 263                                  *  \ingroup Group_EndpointPacketManagement
 264                                  *
 265                                  *  \note This is not applicable for non CONTROL type endpoints.
 266                                  */
 267                                 static inline void Endpoint_ClearSETUP(void);
 268
 269                                 /** Sends an IN packet to the host on the currently selected endpoint, freeing up the endpoint for the
 270                                  *  next packet and switching to the alternative endpoint bank if double banked.
 271                                  *
 272                                  *  \ingroup Group_EndpointPacketManagement
 273                                  */
 274                                 static inline void Endpoint_ClearIN(void);
 275
 276                                 /** Acknowledges an OUT packet to the host on the currently selected endpoint, freeing up the endpoint
 277                                  *  for the next packet and switching to the alternative endpoint bank if double banked.
 278                                  *
 279                                  *  \ingroup Group_EndpointPacketManagement
 280                                  */
 281                                 static inline void Endpoint_ClearOUT(void);
 282
 283                                 /** Stalls the current endpoint, indicating to the host that a logical problem occurred with the
 284                                  *  indicated endpoint and that the current transfer sequence should be aborted. This provides a
 285                                  *  way for devices to indicate invalid commands to the host so that the current transfer can be
 286                                  *  aborted and the host can begin its own recovery sequence.
 287                                  *
 288                                  *  The currently selected endpoint remains stalled until either the \ref Endpoint_ClearStall() macro
 289                                  *  is called, or the host issues a CLEAR FEATURE request to the device for the currently selected
 290                                  *  endpoint.
 291                                  *
 292                                  *  \ingroup Group_EndpointPacketManagement
 293                                  */
 294                                 static inline void Endpoint_StallTransaction(void);
 295
 296                                 /** Clears the STALL condition on the currently selected endpoint.
 297                                  *
 298                                  *  \ingroup Group_EndpointPacketManagement
 299                                  */
 300                                 static inline void Endpoint_ClearStall(void);
 301
 302                                 /** Determines if the currently selected endpoint is stalled, false otherwise.
 303                                  *
 304                                  *  \ingroup Group_EndpointPacketManagement
 305                                  *
 306                                  *  \return Boolean true if the currently selected endpoint is stalled, false otherwise
 307                                  */
 308                                 static inline bool Endpoint_IsStalled(void);
 309
 310                                 /** Resets the data toggle of the currently selected endpoint. */
 311                                 static inline void Endpoint_ResetDataToggle(void);
 312
 313                                 /** Determines the currently selected endpoint's direction.
 314                                  *
 315                                  *  \return The currently selected endpoint's direction, as a ENDPOINT_DIR_* mask.
 316                                  */
 317                                 static inline uint8_t Endpoint_GetEndpointDirection(void);
 318                         #else
 319                                 #if defined(USB_FULL_CONTROLLER) || defined(USB_MODIFIED_FULL_CONTROLLER) || defined(__DOXYGEN__)
 320                                         #define Endpoint_BytesInEndpoint()        UEBCX
 321                                 #else
 322                                         #define Endpoint_BytesInEndpoint()        UEBCLX
 323                                 #endif
 324
 325                                 #if !defined(CONTROL_ONLY_DEVICE)
 326                                         #define Endpoint_GetCurrentEndpoint()     (UENUM & ENDPOINT_EPNUM_MASK)
 327                                 #else
 328                                         #define Endpoint_GetCurrentEndpoint()     ENDPOINT_CONTROLEP
 329                                 #endif
 330
 331                                 #if !defined(CONTROL_ONLY_DEVICE)
 332                                         #define Endpoint_SelectEndpoint(epnum)    MACROS{ UENUM = epnum; }MACROE
 333                                 #else
 334                                         #define Endpoint_SelectEndpoint(epnum)    (void)epnum
 335                                 #endif
 336
 337                                 #define Endpoint_ResetFIFO(epnum)             MACROS{ UERST = (1 << epnum); UERST = 0; }MACROE
 338
 339                                 #define Endpoint_EnableEndpoint()             MACROS{ UECONX |= (1 << EPEN); }MACROE
 340
 341                                 #define Endpoint_DisableEndpoint()            MACROS{ UECONX &= ~(1 << EPEN); }MACROE
 342
 343                                 #define Endpoint_IsEnabled()                  ((UECONX & (1 << EPEN)) ? true : false)
 344
 345                                 #if !defined(CONTROL_ONLY_DEVICE)
 346                                         #define Endpoint_IsReadWriteAllowed()     ((UEINTX & (1 << RWAL)) ? true : false)
 347                                 #endif
 348
 349                                 #define Endpoint_IsConfigured()               ((UESTA0X & (1 << CFGOK)) ? true : false)
 350
 351                                 #define Endpoint_GetEndpointInterrupts()      UEINT
 352
 353                                 #define Endpoint_HasEndpointInterrupted(n)    ((UEINT & (1 << n)) ? true : false)
 354
 355                                 #define Endpoint_IsINReady()                  ((UEINTX & (1 << TXINI))  ? true : false)
 356
 357                                 #define Endpoint_IsOUTReceived()              ((UEINTX & (1 << RXOUTI)) ? true : false)
 358
 359                                 #define Endpoint_IsSETUPReceived()            ((UEINTX & (1 << RXSTPI)) ? true : false)
 360
 361                                 #define Endpoint_ClearSETUP()                 MACROS{ UEINTX &= ~(1 << RXSTPI); }MACROE
 362
 363                                 #if !defined(CONTROL_ONLY_DEVICE)
 364                                         #define Endpoint_ClearIN()                MACROS{ uint8_t Temp = UEINTX; UEINTX = (Temp & ~(1 << TXINI)); \
 365                                                                                           UEINTX = (Temp & ~(1 << FIFOCON)); }MACROE
 366                                 #else
 367                                         #define Endpoint_ClearIN()                MACROS{ UEINTX &= ~(1 << TXINI); }MACROE
 368                                 #endif
 369
 370                                 #if !defined(CONTROL_ONLY_DEVICE)
 371                                         #define Endpoint_ClearOUT()               MACROS{ uint8_t Temp = UEINTX; UEINTX = (Temp & ~(1 << RXOUTI)); \
 372                                                                                           UEINTX = (Temp & ~(1 << FIFOCON)); }MACROE
 373                                 #else
 374                                         #define Endpoint_ClearOUT()               MACROS{ UEINTX &= ~(1 << RXOUTI); }MACROE
 375                                 #endif
 376
 377                                 #define Endpoint_StallTransaction()           MACROS{ UECONX |= (1 << STALLRQ); }MACROE
 378
 379                                 #define Endpoint_ClearStall()                 MACROS{ UECONX |= (1 << STALLRQC); }MACROE
 380
 381                                 #define Endpoint_IsStalled()                  ((UECONX & (1 << STALLRQ)) ? true : false)
 382
 383                                 #define Endpoint_ResetDataToggle()            MACROS{ UECONX |= (1 << RSTDT); }MACROE
 384
 385                                 #define Endpoint_GetEndpointDirection()       (UECFG0X & ENDPOINT_DIR_IN)
 386                         #endif
 387
 388                 /* Enums: */
 389                         /** Enum for the possible error return codes of the \ref Endpoint_WaitUntilReady() function.
 390                          *
 391                          *  \ingroup Group_EndpointRW
 392                          */
 393                         enum Endpoint_WaitUntilReady_ErrorCodes_t
 394                         {
 395                                 ENDPOINT_READYWAIT_NoError                 = 0, /**< Endpoint is ready for next packet, no error. */
 396                                 ENDPOINT_READYWAIT_EndpointStalled         = 1, /**< The endpoint was stalled during the stream
 397                                                                                  *   transfer by the host or device.
 398                                                                                  */
 399                                 ENDPOINT_READYWAIT_DeviceDisconnected      = 2, /**< Device was disconnected from the host while
 400                                                                                  *   waiting for the endpoint to become ready.
 401                                                                                  */
 402                                 ENDPOINT_READYWAIT_Timeout                 = 3, /**< The host failed to accept or send the next packet
 403                                                                                  *   within the software timeout period set by the
 404                                                                                  *   \ref USB_STREAM_TIMEOUT_MS macro.
 405                                                                                  */
 406                         };
 407
 408                         /** Enum for the possible error return codes of the Endpoint_*_Stream_* functions.
 409                          *
 410                          *  \ingroup Group_EndpointRW
 411                          */
 412                         enum Endpoint_Stream_RW_ErrorCodes_t
 413                         {
 414                                 ENDPOINT_RWSTREAM_NoError            = 0, /**< Command completed successfully, no error. */
 415                                 ENDPOINT_RWSTREAM_EndpointStalled    = 1, /**< The endpoint was stalled during the stream
 416                                                                            *   transfer by the host or device.
 417                                                                            */
 418                                 ENDPOINT_RWSTREAM_DeviceDisconnected = 1, /**< Device was disconnected from the host during
 419                                                                            *   the transfer.
 420                                                                            */
 421                                 ENDPOINT_RWSTREAM_Timeout            = 2, /**< The host failed to accept or send the next packet
 422                                                                            *   within the software timeout period set by the
 423                                                                            *   \ref USB_STREAM_TIMEOUT_MS macro.
 424                                                                            */
 425                                 ENDPOINT_RWSTREAM_CallbackAborted    = 3, /**< Indicates that the stream's callback function
 426                                                                        *   aborted the transfer early.
 427                                                                            */
 428                         };
 429
 430                         /** Enum for the possible error return codes of the Endpoint_*_Control_Stream_* functions..
 431                          *
 432                          *  \ingroup Group_EndpointRW
 433                          */
 434                         enum Endpoint_ControlStream_RW_ErrorCodes_t
 435                         {
 436                                 ENDPOINT_RWCSTREAM_NoError            = 0, /**< Command completed successfully, no error. */
 437                                 ENDPOINT_RWCSTREAM_HostAborted        = 1, /**< The aborted the transfer prematurely. */
 438                         };
 439
 440                 /* Inline Functions: */
 441                         /** Reads one byte from the currently selected endpoint's bank, for OUT direction endpoints.
 442                          *
 443                          *  \ingroup Group_EndpointRW
 444                          *
 445                          *  \return Next byte in the currently selected endpoint's FIFO buffer
 446                          */
 447                         static inline uint8_t Endpoint_Read_Byte(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
 448                         static inline uint8_t Endpoint_Read_Byte(void)
 449                         {
 450                                 return UEDATX;
 451                         }
 452
 453                         /** Writes one byte from the currently selected endpoint's bank, for IN direction endpoints.
 454                          *
 455                          *  \ingroup Group_EndpointRW
 456                          *
 457                          *  \param Byte  Next byte to write into the the currently selected endpoint's FIFO buffer
 458                          */
 459                         static inline void Endpoint_Write_Byte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
 460                         static inline void Endpoint_Write_Byte(const uint8_t Byte)
 461                         {
 462                                 UEDATX = Byte;
 463                         }
 464
 465                         /** Discards one byte from the currently selected endpoint's bank, for OUT direction endpoints.
 466                          *
 467                          *  \ingroup Group_EndpointRW
 468                          */
 469                         static inline void Endpoint_Discard_Byte(void) ATTR_ALWAYS_INLINE;
 470                         static inline void Endpoint_Discard_Byte(void)
 471                         {
 472                                 uint8_t Dummy;
 473
 474                                 Dummy = UEDATX;
 475                         }
 476
 477                         /** Reads two bytes from the currently selected endpoint's bank in little endian format, for OUT
 478                          *  direction endpoints.
 479                          *
 480                          *  \ingroup Group_EndpointRW
 481                          *
 482                          *  \return Next word in the currently selected endpoint's FIFO buffer
 483                          */
 484                         static inline uint16_t Endpoint_Read_Word_LE(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
 485                         static inline uint16_t Endpoint_Read_Word_LE(void)
 486                         {
 487                                 uint16_t Data;
 488
 489                                 Data  = UEDATX;
 490                                 Data |= (((uint16_t)UEDATX) << 8);
 491
 492                                 return Data;
 493                         }
 494
 495                         /** Reads two bytes from the currently selected endpoint's bank in big endian format, for OUT
 496                          *  direction endpoints.
 497                          *
 498                          *  \ingroup Group_EndpointRW
 499                          *
 500                          *  \return Next word in the currently selected endpoint's FIFO buffer
 501                          */
 502                         static inline uint16_t Endpoint_Read_Word_BE(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
 503                         static inline uint16_t Endpoint_Read_Word_BE(void)
 504                         {
 505                                 uint16_t Data;
 506
 507                                 Data  = (((uint16_t)UEDATX) << 8);
 508                                 Data |= UEDATX;
 509
 510                                 return Data;
 511                         }
 512
 513                         /** Writes two bytes to the currently selected endpoint's bank in little endian format, for IN
 514                          *  direction endpoints.
 515                          *
 516                          *  \ingroup Group_EndpointRW
 517                          *
 518                          *  \param Word  Next word to write to the currently selected endpoint's FIFO buffer
 519                          */
 520                         static inline void Endpoint_Write_Word_LE(const uint16_t Word) ATTR_ALWAYS_INLINE;
 521                         static inline void Endpoint_Write_Word_LE(const uint16_t Word)
 522                         {
 523                                 UEDATX = (Word & 0xFF);
 524                                 UEDATX = (Word >> 8);
 525                         }
 526
 527                         /** Writes two bytes to the currently selected endpoint's bank in big endian format, for IN
 528                          *  direction endpoints.
 529                          *
 530                          *  \ingroup Group_EndpointRW
 531                          *
 532                          *  \param Word  Next word to write to the currently selected endpoint's FIFO buffer
 533                          */
 534                         static inline void Endpoint_Write_Word_BE(const uint16_t Word) ATTR_ALWAYS_INLINE;
 535                         static inline void Endpoint_Write_Word_BE(const uint16_t Word)
 536                         {
 537                                 UEDATX = (Word >> 8);
 538                                 UEDATX = (Word & 0xFF);
 539                         }
 540
 541                         /** Discards two bytes from the currently selected endpoint's bank, for OUT direction endpoints.
 542                          *
 543                          *  \ingroup Group_EndpointRW
 544                          */
 545                         static inline void Endpoint_Discard_Word(void) ATTR_ALWAYS_INLINE;
 546                         static inline void Endpoint_Discard_Word(void)
 547                         {
 548                                 uint8_t Dummy;
 549
 550                                 Dummy = UEDATX;
 551                                 Dummy = UEDATX;
 552                         }
 553
 554                         /** Reads four bytes from the currently selected endpoint's bank in little endian format, for OUT
 555                          *  direction endpoints.
 556                          *
 557                          *  \ingroup Group_EndpointRW
 558                          *
 559                          *  \return Next double word in the currently selected endpoint's FIFO buffer
 560                          */
 561                         static inline uint32_t Endpoint_Read_DWord_LE(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
 562                         static inline uint32_t Endpoint_Read_DWord_LE(void)
 563                         {
 564                                 union
 565                                 {
 566                                         uint32_t DWord;
 567                                         uint8_t  Bytes[4];
 568                                 } Data;
 569
 570                                 Data.Bytes[0] = UEDATX;
 571                                 Data.Bytes[1] = UEDATX;
 572                                 Data.Bytes[2] = UEDATX;
 573                                 Data.Bytes[3] = UEDATX;
 574
 575                                 return Data.DWord;
 576                         }
 577
 578                         /** Reads four bytes from the currently selected endpoint's bank in big endian format, for OUT
 579                          *  direction endpoints.
 580                          *
 581                          *  \ingroup Group_EndpointRW
 582                          *
 583                          *  \return Next double word in the currently selected endpoint's FIFO buffer
 584                          */
 585                         static inline uint32_t Endpoint_Read_DWord_BE(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
 586                         static inline uint32_t Endpoint_Read_DWord_BE(void)
 587                         {
 588                                 union
 589                                 {
 590                                         uint32_t DWord;
 591                                         uint8_t  Bytes[4];
 592                                 } Data;
 593
 594                                 Data.Bytes[3] = UEDATX;
 595                                 Data.Bytes[2] = UEDATX;
 596                                 Data.Bytes[1] = UEDATX;
 597                                 Data.Bytes[0] = UEDATX;
 598
 599                                 return Data.DWord;
 600                         }
 601
 602                         /** Writes four bytes to the currently selected endpoint's bank in little endian format, for IN
 603                          *  direction endpoints.
 604                          *
 605                          *  \ingroup Group_EndpointRW
 606                          *
 607                          *  \param DWord  Next double word to write to the currently selected endpoint's FIFO buffer
 608                          */
 609                         static inline void Endpoint_Write_DWord_LE(const uint32_t DWord) ATTR_ALWAYS_INLINE;
 610                         static inline void Endpoint_Write_DWord_LE(const uint32_t DWord)
 611                         {
 612                                 UEDATX = (DWord &  0xFF);
 613                                 UEDATX = (DWord >> 8);
 614                                 UEDATX = (DWord >> 16);
 615                                 UEDATX = (DWord >> 24);
 616                         }
 617
 618                         /** Writes four bytes to the currently selected endpoint's bank in big endian format, for IN
 619                          *  direction endpoints.
 620                          *
 621                          *  \ingroup Group_EndpointRW
 622                          *
 623                          *  \param DWord  Next double word to write to the currently selected endpoint's FIFO buffer
 624                          */
 625                         static inline void Endpoint_Write_DWord_BE(const uint32_t DWord) ATTR_ALWAYS_INLINE;
 626                         static inline void Endpoint_Write_DWord_BE(const uint32_t DWord)
 627                         {
 628                                 UEDATX = (DWord >> 24);
 629                                 UEDATX = (DWord >> 16);
 630                                 UEDATX = (DWord >> 8);
 631                                 UEDATX = (DWord &  0xFF);
 632                         }
 633
 634                         /** Discards four bytes from the currently selected endpoint's bank, for OUT direction endpoints.
 635                          *
 636                          *  \ingroup Group_EndpointRW
 637                          */
 638                         static inline void Endpoint_Discard_DWord(void) ATTR_ALWAYS_INLINE;
 639                         static inline void Endpoint_Discard_DWord(void)
 640                         {
 641                                 uint8_t Dummy;
 642
 643                                 Dummy = UEDATX;
 644                                 Dummy = UEDATX;
 645                                 Dummy = UEDATX;
 646                                 Dummy = UEDATX;
 647                         }
 648
 649                 /* External Variables: */
 650                         /** Global indicating the maximum packet size of the default control endpoint located at address
 651                          *  0 in the device. This value is set to the value indicated in the device descriptor in the user
 652                          *  project once the USB interface is initialized into device mode.
 653                          *
 654                          *  If space is an issue, it is possible to fix this to a static value by defining the control
 655                          *  endpoint size in the FIXED_CONTROL_ENDPOINT_SIZE token passed to the compiler in the makefile
 656                          *  via the -D switch. When a fixed control endpoint size is used, the size is no longer dynamically
 657                          *  read from the descriptors at runtime and instead fixed to the given value. When used, it is
 658                          *  important that the descriptor control endpoint size value matches the size given as the
 659                          *  FIXED_CONTROL_ENDPOINT_SIZE token - it is recommended that the FIXED_CONTROL_ENDPOINT_SIZE token
 660                          *  be used in the descriptors to ensure this.
 661                          *
 662                          *  \note This variable should be treated as read-only in the user application, and never manually
 663                          *        changed in value.
 664                          */
 665                         #if (!defined(FIXED_CONTROL_ENDPOINT_SIZE) || defined(__DOXYGEN__))
 666                                 extern uint8_t USB_ControlEndpointSize;
 667                         #else
 668                                 #define USB_ControlEndpointSize FIXED_CONTROL_ENDPOINT_SIZE
 669                         #endif
 670
 671                 /* Function Prototypes: */
 672                         /** Configures the specified endpoint number with the given endpoint type, direction, bank size
 673                          *  and banking mode. Endpoints should be allocated in ascending order by their address in the
 674                          *  device (i.e. endpoint 1 should be configured before endpoint 2 and so on).
 675                          *
 676                          *  The endpoint type may be one of the EP_TYPE_* macros listed in LowLevel.h and the direction
 677                          *  may be either \ref ENDPOINT_DIR_OUT or \ref ENDPOINT_DIR_IN.
 678                          *
 679                          *  The bank size must indicate the maximum packet size that the endpoint can handle. Different
 680                          *  endpoint numbers can handle different maximum packet sizes - refer to the chosen USB AVR's
 681                          *  datasheet to determine the maximum bank size for each endpoint.
 682                          *
 683                          *  The banking mode may be either \ref ENDPOINT_BANK_SINGLE or \ref ENDPOINT_BANK_DOUBLE.
 684                          *
 685                          *  The success of this routine can be determined via the \ref Endpoint_IsConfigured() macro.
 686                          *
 687                          *  \note This routine will select the specified endpoint, and the endpoint will remain selected
 688                          *        once the routine completes regardless of if the endpoint configuration succeeds.
 689                          *
 690                          *  \return Boolean true if the configuration succeeded, false otherwise
 691                          */
 692                         bool Endpoint_ConfigureEndpoint(const uint8_t  Number, const uint8_t Type, const uint8_t Direction,
 693                                                         const uint16_t Size, const uint8_t Banks);
 694
 695                         #if !defined(CONTROL_ONLY_DEVICE)
 696
 697                         /** Spinloops until the currently selected non-control endpoint is ready for the next packet of data
 698                          *  to be read or written to it.
 699                          *
 700                          *  \note This routine should not be called on CONTROL type endpoints.
 701                          *
 702                          *  \ingroup Group_EndpointRW
 703                          *
 704                          *  \return A value from the \ref Endpoint_WaitUntilReady_ErrorCodes_t enum.
 705                          */
 706                         uint8_t Endpoint_WaitUntilReady(void);
 707
 708                         /** Reads and discards the given number of bytes from the endpoint from the given buffer,
 709                          *  discarding fully read packets from the host as needed. The last packet is not automatically
 710                          *  discarded once the remaining bytes has been read; the user is responsible for manually
 711                          *  discarding the last packet from the host via the \ref Endpoint_ClearOUT() macro. Between
 712                          *  each USB packet, the given stream callback function is executed repeatedly until the next
 713                          *  packet is ready, allowing for early aborts of stream transfers.
 714                          *
 715                          *      The callback routine should be created according to the information in \ref Group_StreamCallbacks.
 716                          *  If the token NO_STREAM_CALLBACKS is passed via the -D option to the compiler, stream callbacks are
 717                          *  disabled and this function has the Callback parameter omitted.
 718                          *
 719                          *  \note This routine should not be used on CONTROL type endpoints.
 720                          *
 721                          *  \ingroup Group_EndpointRW
 722                          *
 723                          *  \param Length    Number of bytes to send via the currently selected endpoint.
 724                          *  \param Callback  Name of a callback routine to call between successive USB packet transfers, NULL if no callback
 725                          *
 726                          *  \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
 727                          */
 728                         uint8_t Endpoint_Discard_Stream(uint16_t Length
 729                         #if !defined(NO_STREAM_CALLBACKS) || defined(__DOXYGEN__)
 730                                                         , StreamCallbackPtr_t Callback
 731                         #endif
 732                                                         );
 733
 734                         /** Writes the given number of bytes to the endpoint from the given buffer in little endian,
 735                          *  sending full packets to the host as needed. The last packet filled is not automatically sent;
 736                          *  the user is responsible for manually sending the last written packet to the host via the
 737                          *  \ref Endpoint_ClearIN() macro. Between each USB packet, the given stream callback function
 738                          *  is executed repeatedly until the endpoint is ready to accept the next packet, allowing for early
 739                          *  aborts of stream transfers.
 740                          *
 741                          *      The callback routine should be created according to the information in \ref Group_StreamCallbacks.
 742                          *  If the token NO_STREAM_CALLBACKS is passed via the -D option to the compiler, stream callbacks are
 743                          *  disabled and this function has the Callback parameter omitted.
 744                          *
 745                          *  \note This routine should not be used on CONTROL type endpoints.
 746                          *
 747                          *  \ingroup Group_EndpointRW
 748                          *
 749                          *  \param Buffer    Pointer to the source data buffer to read from.
 750                          *  \param Length    Number of bytes to read for the currently selected endpoint into the buffer.
 751                          *  \param Callback  Name of a callback routine to call between successive USB packet transfers, NULL if no callback
 752                          *
 753                          *  \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
 754                          */
 755                         uint8_t Endpoint_Write_Stream_LE(const void* Buffer, uint16_t Length
 756                         #if !defined(NO_STREAM_CALLBACKS) || defined(__DOXYGEN__)
 757                                                          , StreamCallbackPtr_t Callback
 758                         #endif
 759                                                          ) ATTR_NON_NULL_PTR_ARG(1);
 760
 761                         /** Writes the given number of bytes to the endpoint from the given buffer in big endian,
 762                          *  sending full packets to the host as needed. The last packet filled is not automatically sent;
 763                          *  the user is responsible for manually sending the last written packet to the host via the
 764                          *  \ref Endpoint_ClearIN() macro. Between each USB packet, the given stream callback function
 765                          *  is executed repeatedly until the endpoint is ready to accept the next packet, allowing for early
 766                          *  aborts of stream transfers.
 767                          *
 768                          *      The callback routine should be created according to the information in \ref Group_StreamCallbacks.
 769                          *  If the token NO_STREAM_CALLBACKS is passed via the -D option to the compiler, stream callbacks are
 770                          *  disabled and this function has the Callback parameter omitted.
 771                          *
 772                          *  \note This routine should not be used on CONTROL type endpoints.
 773                          *
 774                          *  \ingroup Group_EndpointRW
 775                          *
 776                          *  \param Buffer    Pointer to the source data buffer to read from.
 777                          *  \param Length    Number of bytes to read for the currently selected endpoint into the buffer.
 778                          *  \param Callback  Name of a callback routine to call between successive USB packet transfers, NULL if no callback
 779                          *
 780                          *  \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
 781                          */
 782                         uint8_t Endpoint_Write_Stream_BE(const void* Buffer, uint16_t Length
 783                         #if !defined(NO_STREAM_CALLBACKS) || defined(__DOXYGEN__)
 784                                                          , StreamCallbackPtr_t Callback
 785                         #endif
 786                                                          ) ATTR_NON_NULL_PTR_ARG(1);
 787
 788                         /** Reads the given number of bytes from the endpoint from the given buffer in little endian,
 789                          *  discarding fully read packets from the host as needed. The last packet is not automatically
 790                          *  discarded once the remaining bytes has been read; the user is responsible for manually
 791                          *  discarding the last packet from the host via the \ref Endpoint_ClearOUT() macro. Between
 792                          *  each USB packet, the given stream callback function is executed repeatedly until the endpoint
 793                          *  is ready to accept the next packet, allowing for early aborts of stream transfers.
 794                          *
 795                          *      The callback routine should be created according to the information in \ref Group_StreamCallbacks.
 796                          *  If the token NO_STREAM_CALLBACKS is passed via the -D option to the compiler, stream callbacks are
 797                          *  disabled and this function has the Callback parameter omitted.
 798                          *
 799                          *  \note This routine should not be used on CONTROL type endpoints.
 800                          *
 801                          *  \ingroup Group_EndpointRW
 802                          *
 803                          *  \param Buffer    Pointer to the destination data buffer to write to.
 804                          *  \param Length    Number of bytes to send via the currently selected endpoint.
 805                          *  \param Callback  Name of a callback routine to call between successive USB packet transfers, NULL if no callback
 806                          *
 807                          *  \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
 808                          */
 809                         uint8_t Endpoint_Read_Stream_LE(void* Buffer, uint16_t Length
 810                         #if !defined(NO_STREAM_CALLBACKS) || defined(__DOXYGEN__)
 811                                                         , StreamCallbackPtr_t Callback
 812                         #endif
 813                                                         ) ATTR_NON_NULL_PTR_ARG(1);
 814
 815                         /** Reads the given number of bytes from the endpoint from the given buffer in big endian,
 816                          *  discarding fully read packets from the host as needed. The last packet is not automatically
 817                          *  discarded once the remaining bytes has been read; the user is responsible for manually
 818                          *  discarding the last packet from the host via the \ref Endpoint_ClearOUT() macro. Between
 819                          *  each USB packet, the given stream callback function is executed repeatedly until the endpoint
 820                          *  is ready to accept the next packet, allowing for early aborts of stream transfers.
 821                          *
 822                          *      The callback routine should be created according to the information in \ref Group_StreamCallbacks.
 823                          *  If the token NO_STREAM_CALLBACKS is passed via the -D option to the compiler, stream callbacks are
 824                          *  disabled and this function has the Callback parameter omitted.
 825                          *
 826                          *  \note This routine should not be used on CONTROL type endpoints.
 827                          *
 828                          *  \ingroup Group_EndpointRW
 829                          *
 830                          *  \param Buffer    Pointer to the destination data buffer to write to.
 831                          *  \param Length    Number of bytes to send via the currently selected endpoint.
 832                          *  \param Callback  Name of a callback routine to call between successive USB packet transfers, NULL if no callback
 833                          *
 834                          *  \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
 835                          */
 836                         uint8_t Endpoint_Read_Stream_BE(void* Buffer, uint16_t Length
 837                         #if !defined(NO_STREAM_CALLBACKS) || defined(__DOXYGEN__)
 838                                                         , StreamCallbackPtr_t Callback
 839                         #endif
 840                                                         ) ATTR_NON_NULL_PTR_ARG(1);
 841
 842                         #endif
 843
 844                         /** Writes the given number of bytes to the CONTROL type endpoint from the given buffer in little endian,
 845                          *  sending full packets to the host as needed. The host OUT acknowledgement is not automatically cleared
 846                          *  in both failure and success states; the user is responsible for manually clearing the setup OUT to
 847                          *  finalize the transfer via the \ref Endpoint_ClearOUT() macro.
 848                          *
 849                          *  \note This routine should only be used on CONTROL type endpoints.
 850                          *
 851                          *  \warning Unlike the standard stream read/write commands, the control stream commands cannot be chained
 852                          *           together; i.e. the entire stream data must be read or written at the one time.
 853                          *
 854                          *  \ingroup Group_EndpointRW
 855                          *
 856                          *  \param Buffer  Pointer to the source data buffer to read from.
 857                          *  \param Length  Number of bytes to read for the currently selected endpoint into the buffer.
 858                          *
 859                          *  \return A value from the \ref Endpoint_ControlStream_RW_ErrorCodes_t enum.
 860                          */
 861                         uint8_t Endpoint_Write_Control_Stream_LE(const void* Buffer, uint16_t Length) ATTR_NON_NULL_PTR_ARG(1);
 862
 863                         /** Writes the given number of bytes to the CONTROL type endpoint from the given buffer in big endian,
 864                          *  sending full packets to the host as needed. The host OUT acknowledgement is not automatically cleared
 865                          *  in both failure and success states; the user is responsible for manually clearing the setup OUT to
 866                          *  finalize the transfer via the \ref Endpoint_ClearOUT() macro.
 867                          *
 868                          *  \note This routine should only be used on CONTROL type endpoints.
 869                          *
 870                          *  \warning Unlike the standard stream read/write commands, the control stream commands cannot be chained
 871                          *           together; i.e. the entire stream data must be read or written at the one time.
 872                          *
 873                          *  \ingroup Group_EndpointRW
 874                          *
 875                          *  \param Buffer  Pointer to the source data buffer to read from.
 876                          *  \param Length  Number of bytes to read for the currently selected endpoint into the buffer.
 877                          *
 878                          *  \return A value from the \ref Endpoint_ControlStream_RW_ErrorCodes_t enum.
 879                          */
 880                         uint8_t Endpoint_Write_Control_Stream_BE(const void* Buffer, uint16_t Length) ATTR_NON_NULL_PTR_ARG(1);
 881
 882                         /** Reads the given number of bytes from the CONTROL endpoint from the given buffer in little endian,
 883                          *  discarding fully read packets from the host as needed. The device IN acknowledgement is not
 884                          *  automatically sent after success or failure states; the user is responsible for manually sending the
 885                          *  setup IN to finalize the transfer via the \ref Endpoint_ClearIN() macro.
 886                          *
 887                          *  \note This routine should only be used on CONTROL type endpoints.
 888                          *
 889                          *  \warning Unlike the standard stream read/write commands, the control stream commands cannot be chained
 890                          *           together; i.e. the entire stream data must be read or written at the one time.
 891                          *
 892                          *  \ingroup Group_EndpointRW
 893                          *
 894                          *  \param Buffer  Pointer to the destination data buffer to write to.
 895                          *  \param Length  Number of bytes to send via the currently selected endpoint.
 896                          *
 897                          *  \return A value from the \ref Endpoint_ControlStream_RW_ErrorCodes_t enum.
 898                          */
 899                         uint8_t Endpoint_Read_Control_Stream_LE(void* Buffer, uint16_t Length) ATTR_NON_NULL_PTR_ARG(1);
 900
 901                         /** Reads the given number of bytes from the CONTROL endpoint from the given buffer in big endian,
 902                          *  discarding fully read packets from the host as needed. The device IN acknowledgement is not
 903                          *  automatically sent after success or failure states; the user is responsible for manually sending the
 904                          *  setup IN to finalize the transfer via the \ref Endpoint_ClearIN() macro.
 905                          *
 906                          *  \note This routine should only be used on CONTROL type endpoints.
 907                          *
 908                          *  \warning Unlike the standard stream read/write commands, the control stream commands cannot be chained
 909                          *           together; i.e. the entire stream data must be read or written at the one time.
 910                          *
 911                          *  \ingroup Group_EndpointRW
 912                          *
 913                          *  \param Buffer  Pointer to the destination data buffer to write to.
 914                          *  \param Length  Number of bytes to send via the currently selected endpoint.
 915                          *
 916                          *  \return A value from the \ref Endpoint_ControlStream_RW_ErrorCodes_t enum.
 917                          */
 918                         uint8_t Endpoint_Read_Control_Stream_BE(void* Buffer, uint16_t Length) ATTR_NON_NULL_PTR_ARG(1);
 919
 920         /* Private Interface - For use in library only: */
 921         #if !defined(__DOXYGEN__)
 922                 /* Macros: */
 923                         #define Endpoint_AllocateMemory()              MACROS{ UECFG1X |=  (1 << ALLOC); }MACROE
 924                         #define Endpoint_DeallocateMemory()            MACROS{ UECFG1X &= ~(1 << ALLOC); }MACROE
 925
 926                         #define _ENDPOINT_GET_MAXSIZE(n)               _ENDPOINT_GET_MAXSIZE2(ENDPOINT_DETAILS_EP ## n)
 927                         #define _ENDPOINT_GET_MAXSIZE2(details)        _ENDPOINT_GET_MAXSIZE3(details)
 928                         #define _ENDPOINT_GET_MAXSIZE3(maxsize, db)    maxsize
 929
 930                         #define _ENDPOINT_GET_DOUBLEBANK(n)            _ENDPOINT_GET_DOUBLEBANK2(ENDPOINT_DETAILS_EP ## n)
 931                         #define _ENDPOINT_GET_DOUBLEBANK2(details)     _ENDPOINT_GET_DOUBLEBANK3(details)
 932                         #define _ENDPOINT_GET_DOUBLEBANK3(maxsize, db) db
 933
 934                         #if defined(USB_FULL_CONTROLLER) || defined(USB_MODIFIED_FULL_CONTROLLER)
 935                                 #define ENDPOINT_DETAILS_EP0               64,  true
 936                                 #define ENDPOINT_DETAILS_EP1               256, true
 937                                 #define ENDPOINT_DETAILS_EP2               64,  true
 938                                 #define ENDPOINT_DETAILS_EP3               64,  true
 939                                 #define ENDPOINT_DETAILS_EP4               64,  true
 940                                 #define ENDPOINT_DETAILS_EP5               64,  true
 941                                 #define ENDPOINT_DETAILS_EP6               64,  true
 942                         #else
 943                                 #define ENDPOINT_DETAILS_EP0               64,  true
 944                                 #define ENDPOINT_DETAILS_EP1               64,  false
 945                                 #define ENDPOINT_DETAILS_EP2               64,  false
 946                                 #define ENDPOINT_DETAILS_EP3               64,  true
 947                                 #define ENDPOINT_DETAILS_EP4               64,  true
 948                         #endif
 949
 950                         #define Endpoint_ConfigureEndpoint(Number, Type, Direction, Size, Banks)            \
 951                                                             Endpoint_ConfigureEndpoint_Prv(Number,          \
 952                                                                       ((Type << EPTYPE0) | Direction),      \
 953                                                                       ((1 << ALLOC) | Banks |               \
 954                                                                         (__builtin_constant_p(Size) ?       \
 955                                                                          Endpoint_BytesToEPSizeMask(Size) :  \
 956                                                                          Endpoint_BytesToEPSizeMaskDynamic(Size))))
 957
 958                 /* Function Prototypes: */
 959                         void    Endpoint_ClearEndpoints(void);
 960                         uint8_t Endpoint_BytesToEPSizeMaskDynamic(const uint16_t Size);
 961                         bool    Endpoint_ConfigureEndpoint_Prv(const uint8_t Number, const uint8_t UECFG0XData, const uint8_t UECFG1XData);
 962
 963                 /* Inline Functions: */
 964                         static inline uint8_t Endpoint_BytesToEPSizeMask(const uint16_t Bytes) ATTR_WARN_UNUSED_RESULT ATTR_CONST ATTR_ALWAYS_INLINE;
 965                         static inline uint8_t Endpoint_BytesToEPSizeMask(const uint16_t Bytes)
 966                         {
 967                                 uint8_t  MaskVal    = 0;
 968                                 uint16_t CheckBytes = 8;
 969
 970                                 while (CheckBytes < Bytes)
 971                                 {
 972                                         MaskVal++;
 973                                         CheckBytes <<= 1;
 974                                 }
 975
 976                                 return (MaskVal << EPSIZE0);
 977                         };
 978
 979         #endif
 980
 981         /* Disable C linkage for C++ Compilers: */
 982                 #if defined(__cplusplus)
 983                         }
 984                 #endif
 985
 986 #endif
 987
 988 /** @} */