1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
|
/*
LUFA Library
Copyright (C) Dean Camera, 2011.
dean [at] fourwalledcubicle [dot] com
www.lufa-lib.org
*/
/*
Copyright 2011 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 USB host pipe stream function definitions.
*
* This file contains structures, function prototypes and macros related to the sending and receiving of
* arbitrary data streams through the device's data pipes when the library is initialized in USB host mode.
*
* \note This file should not be included directly. It is automatically included as needed by the USB driver
* dispatch header located in LUFA/Drivers/USB/USB.h.
*/
/** \ingroup Group_PipeRW
* @defgroup Group_PipeStreamRW Read/Write of Multi-Byte Streams
*
* Functions, macros, variables, enums and types related to data reading and writing of data streams from
* and to pipes.
*
* @{
*/
#ifndef __PIPE_STREAM_H__
#define __PIPE_STREAM_H__
/* Includes: */
#include <avr/pgmspace.h>
#include <avr/eeprom.h>
#include <stdbool.h>
#include "../../../Common/Common.h"
#include "USBTask.h"
/* Enable C linkage for C++ Compilers: */
#if defined(__cplusplus)
extern "C" {
#endif
/* Preprocessor Checks: */
#if !defined(__INCLUDE_FROM_USB_DRIVER)
#error Do not include this file directly. Include LUFA/Drivers/USB/USB.h instead.
#endif
/* Public Interface - May be used in end-application: */
/* Enums: */
/** Enum for the possible error return codes of the Pipe_*_Stream_* functions. */
enum Pipe_Stream_RW_ErrorCodes_t
{
PIPE_RWSTREAM_NoError = 0, /**< Command completed successfully, no error. */
PIPE_RWSTREAM_PipeStalled = 1, /**< The device stalled the pipe during the transfer. */
PIPE_RWSTREAM_DeviceDisconnected = 2, /**< Device was disconnected from the host during
* the transfer.
*/
PIPE_RWSTREAM_Timeout = 3, /**< The device failed to accept or send the next packet
* within the software timeout period set by the
* \ref USB_STREAM_TIMEOUT_MS macro.
*/
PIPE_RWSTREAM_IncompleteTransfer = 4, /**< Indicates that the pipe bank became full/empty before the
* complete contents of the stream could be transferred.
*/
};
/* Function Prototypes: */
/** \name Stream functions for null data */
//@{
/** Reads and discards the given number of bytes from the pipe, discarding fully read packets from the host
* as needed. The last packet is not automatically discarded once the remaining bytes has been read; the
* user is responsible for manually discarding the last packet from the device via the \ref Pipe_ClearIN() macro.
*
* If the BytesProcessed parameter is \c NULL, the entire stream transfer is attempted at once, failing or
* succeeding as a single unit. If the BytesProcessed parameter points to a valid storage location, the transfer
* will instead be performed as a series of chunks. Each time the pipe bank becomes empty while there is still data
* to process (and after the current packet has been acknowledged) the BytesProcessed location will be updated with
* the total number of bytes processed in the stream, and the function will exit with an error code of
* \ref PIPE_RWSTREAM_IncompleteTransfer. This allows for any abort checking to be performed in the user code - to
* continue the transfer, call the function again with identical parameters and it will resume until the BytesProcessed
* value reaches the total transfer length.
*
* <b>Single Stream Transfer Example:</b>
* \code
* uint8_t ErrorCode;
*
* if ((ErrorCode = Pipe_Discard_Stream(512, NULL)) != PIPE_RWSTREAM_NoError)
* {
* // Stream failed to complete - check ErrorCode here
* }
* \endcode
*
* <b>Partial Stream Transfers Example:</b>
* \code
* uint8_t ErrorCode;
* uint16_t BytesProcessed;
*
* BytesProcessed = 0;
* while ((ErrorCode = Pipe_Discard_Stream(512, &BytesProcessed)) == PIPE_RWSTREAM_IncompleteTransfer)
* {
* // Stream not yet complete - do other actions here, abort if required
* }
*
* if (ErrorCode != PIPE_RWSTREAM_NoError)
* {
* // Stream failed to complete - check ErrorCode here
* }
* \endcode
*
* \note The pipe token is set automatically, thus this can be used on bi-directional pipes directly without
* having to explicitly change the data direction with a call to \ref Pipe_SetPipeToken().
*
* \param[in] Length Number of bytes to discard via the currently selected pipe.
* \param[in] BytesProcessed Pointer to a location where the total number of bytes already processed should
* updated, \c NULL if the entire stream should be processed at once.
*
* \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum.
*/
uint8_t Pipe_Discard_Stream(uint16_t Length,
uint16_t* const BytesProcessed);
/** Writes a given number of zeroed bytes to the pipe, sending full pipe packets from the host to the device
* as needed. The last packet is not automatically sent once the remaining bytes has been written; the
* user is responsible for manually discarding the last packet from the device via the \ref Pipe_ClearOUT() macro.
*
* If the BytesProcessed parameter is \c NULL, the entire stream transfer is attempted at once, failing or
* succeeding as a single unit. If the BytesProcessed parameter points to a valid storage location, the transfer
* will instead be performed as a series of chunks. Each time the pipe bank becomes full while there is still data
* to process (and after the current packet transmission has been initiated) the BytesProcessed location will be
* updated with the total number of bytes processed in the stream, and the function will exit with an error code of
* \ref PIPE_RWSTREAM_IncompleteTransfer. This allows for any abort checking to be performed in the user code - to
* continue the transfer, call the function again with identical parameters and it will resume until the BytesProcessed
* value reaches the total transfer length.
*
* <b>Single Stream Transfer Example:</b>
* \code
* uint8_t ErrorCode;
*
* if ((ErrorCode = Pipe_Null_Stream(512, NULL)) != PIPE_RWSTREAM_NoError)
* {
* // Stream failed to complete - check ErrorCode here
* }
* \endcode
*
* <b>Partial Stream Transfers Example:</b>
* \code
* uint8_t ErrorCode;
* uint16_t BytesProcessed;
*
* BytesProcessed = 0;
* while ((ErrorCode = Pipe_Null_Stream(512, &BytesProcessed)) == PIPE_RWSTREAM_IncompleteTransfer)
* {
* // Stream not yet complete - do other actions here, abort if required
* }
*
* if (ErrorCode != PIPE_RWSTREAM_NoError)
* {
* // Stream failed to complete - check ErrorCode here
* }
* \endcode
*
* \note The pipe token is set automatically, thus this can be used on bi-directional pipes directly without
* having to explicitly change the data direction with a call to \ref Pipe_SetPipeToken().
*
* \param[in] Length Number of zero bytes to write via the currently selected pipe.
* \param[in] BytesProcessed Pointer to a location where the total number of bytes already processed should
* updated, \c NULL if the entire stream should be processed at once.
*
* \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum.
*/
uint8_t Pipe_Null_Stream(uint16_t Length,
uint16_t* const BytesProcessed);
//@}
/** \name Stream functions for RAM source/destination data */
//@{
/** Writes the given number of bytes to the pipe from the given buffer in little endian,
* sending full packets to the device as needed. The last packet filled is not automatically sent;
* the user is responsible for manually sending the last written packet to the host via the
* \ref Pipe_ClearOUT() macro. Between each USB packet, the given stream callback function is
* executed repeatedly until the next packet is ready, allowing for early aborts of stream transfers.
*
* If the BytesProcessed parameter is \c NULL, the entire stream transfer is attempted at once,
* failing or succeeding as a single unit. If the BytesProcessed parameter points to a valid
* storage location, the transfer will instead be performed as a series of chunks. Each time
* the pipe bank becomes full while there is still data to process (and after the current
* packet transmission has been initiated) the BytesProcessed location will be updated with the
* total number of bytes processed in the stream, and the function will exit with an error code of
* \ref PIPE_RWSTREAM_IncompleteTransfer. This allows for any abort checking to be performed
* in the user code - to continue the transfer, call the function again with identical parameters
* and it will resume until the BytesProcessed value reaches the total transfer length.
*
* <b>Single Stream Transfer Example:</b>
* \code
* uint8_t DataStream[512];
* uint8_t ErrorCode;
*
* if ((ErrorCode = Pipe_Write_Stream_LE(DataStream, sizeof(DataStream),
* NULL)) != PIPE_RWSTREAM_NoError)
* {
* // Stream failed to complete - check ErrorCode here
* }
* \endcode
*
* <b>Partial Stream Transfers Example:</b>
* \code
* uint8_t DataStream[512];
* uint8_t ErrorCode;
* uint16_t BytesProcessed;
*
* BytesProcessed = 0;
* while ((ErrorCode = Pipe_Write_Stream_LE(DataStream, sizeof(DataStream),
* &BytesProcessed)) == PIPE_RWSTREAM_IncompleteTransfer)
* {
* // Stream not yet complete - do other actions here, abort if required
* }
*
* if (ErrorCode != PIPE_RWSTREAM_NoError)
* {
* // Stream failed to complete - check ErrorCode here
* }
* \endcode
*
* \note The pipe token is set automatically, thus this can be used on bi-directional pipes directly without
* having to explicitly change the data direction with a call to \ref Pipe_SetPipeToken().
*
* \param[in] Buffer Pointer to the source data buffer to read from.
* \param[in] Length Number of bytes to read for the currently selected pipe into the buffer.
* \param[in] BytesProcessed Pointer to a location where the total number of bytes already processed should
* updated, \c NULL if the entire stream should be written at once.
*
* \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum.
*/
uint8_t Pipe_Write_Stream_LE(const void* Buffer,
uint16_t Length,
uint16_t* const BytesProcessed) ATTR_NON_NULL_PTR_ARG(1);
/** Writes the given number of bytes to the pipe from the given buffer in big endian,
* sending full packets to the device as needed. The last packet filled is not automatically sent;
* the user is responsible for manually sending the last written packet to the host via the
* \ref Pipe_ClearOUT() macro. Between each USB packet, the given stream callback function is
* executed repeatedly until the next packet is ready, allowing for early aborts of stream transfers.
*
* \note The pipe token is set automatically, thus this can be used on bi-directional pipes directly without
* having to explicitly change the data direction with a call to \ref Pipe_SetPipeToken().
*
* \param[in] Buffer Pointer to the source data buffer to read from.
* \param[in] Length Number of bytes to read for the currently selected pipe into the buffer.
* \param[in] BytesProcessed Pointer to a location where the total number of bytes already processed should
* updated, \c NULL if the entire stream should be written at once.
*
* \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum.
*/
uint8_t Pipe_Write_Stream_BE(const void* Buffer,
uint16_t Length,
uint16_t* const BytesProcessed) ATTR_NON_NULL_PTR_ARG(1);
/** Reads the given number of bytes from the pipe into the given buffer in little endian,
* sending full packets to the device as needed. The last packet filled is not automatically sent;
* the user is responsible for manually sending the last written packet to the host via the
* \ref Pipe_ClearIN() macro. Between each USB packet, the given stream callback function is
* executed repeatedly until the next packet is ready, allowing for early aborts of stream transfers.
*
* If the BytesProcessed parameter is \c NULL, the entire stream transfer is attempted at once,
* failing or succeeding as a single unit. If the BytesProcessed parameter points to a valid
* storage location, the transfer will instead be performed as a series of chunks. Each time
* the pipe bank becomes empty while there is still data to process (and after the current
* packet has been acknowledged) the BytesProcessed location will be updated with the total number
* of bytes processed in the stream, and the function will exit with an error code of
* \ref PIPE_RWSTREAM_IncompleteTransfer. This allows for any abort checking to be performed
* in the user code - to continue the transfer, call the function again with identical parameters
* and it will resume until the BytesProcessed value reaches the total transfer length.
*
* <b>Single Stream Transfer Example:</b>
* \code
* uint8_t DataStream[512];
* uint8_t ErrorCode;
*
* if ((ErrorCode = Pipe_Read_Stream_LE(DataStream, sizeof(DataStream),
* NULL)) != PIPE_RWSTREAM_NoError)
* {
* // Stream failed to complete - check ErrorCode here
* }
* \endcode
*
* <b>Partial Stream Transfers Example:</b>
* \code
* uint8_t DataStream[512];
* uint8_t ErrorCode;
* uint16_t BytesProcessed;
*
* BytesProcessed = 0;
* while ((ErrorCode = Pipe_Read_Stream_LE(DataStream, sizeof(DataStream),
* &BytesProcessed)) == PIPE_RWSTREAM_IncompleteTransfer)
* {
* // Stream not yet complete - do other actions here, abort if required
* }
*
* if (ErrorCode != PIPE_RWSTREAM_NoError)
* {
* // Stream failed to complete - check ErrorCode here
* }
* \endcode
*
* \note The pipe token is set automatically, thus this can be used on bi-directional pipes directly without
* having to explicitly change the data direction with a call to \ref Pipe_SetPipeToken().
*
* \param[out] Buffer Pointer to the source data buffer to write to.
* \param[in] Length Number of bytes to read for the currently selected pipe to read from.
* \param[in] BytesProcessed Pointer to a location where the total number of bytes already processed should
* updated, \c NULL if the entire stream should be read at once.
*
* \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum.
*/
uint8_t Pipe_Read_Stream_LE(void* Buffer,
uint16_t Length,
uint16_t* const BytesProcessed) ATTR_NON_NULL_PTR_ARG(1);
/** Reads the given number of bytes from the pipe into the given buffer in big endian,
* sending full packets to the device as needed. The last packet filled is not automatically sent;
* the user is responsible for manually sending the last written packet to the host via the
* \ref Pipe_ClearIN() macro. Between each USB packet, the given stream callback function is
* executed repeatedly until the next packet is ready, allowing for early aborts of stream transfers.
*
* \note The pipe token is set automatically, thus this can be used on bi-directional pipes directly without
* having to explicitly change the data direction with a call to \ref Pipe_SetPipeToken().
*
* \param[out] Buffer Pointer to the source data buffer to write to.
* \param[in] Length Number of bytes to read for the currently selected pipe to read from.
* \param[in] BytesProcessed Pointer to a location where the total number of bytes already processed should
* updated, \c NULL if the entire stream should be read at once.
*
* \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum.
*/
uint8_t Pipe_Read_Stream_BE(void* Buffer,
uint16_t Length,
uint16_t* const BytesProcessed) ATTR_NON_NULL_PTR_ARG(1);
//@}
/** \name Stream functions for EEPROM source/destination data */
//@{
/** EEPROM buffer source version of \ref Pipe_Write_Stream_LE().
*
* \param[in] Buffer Pointer to the source data buffer to read from.
* \param[in] Length Number of bytes to read for the currently selected pipe into the buffer.
* \param[in] BytesProcessed Pointer to a location where the total number of bytes already processed should
* updated, \c NULL if the entire stream should be written at once.
*
* \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum.
*/
uint8_t Pipe_Write_EStream_LE(const void* Buffer,
uint16_t Length,
uint16_t* const BytesProcessed) ATTR_NON_NULL_PTR_ARG(1);
/** EEPROM buffer source version of \ref Pipe_Write_Stream_BE().
*
* \param[in] Buffer Pointer to the source data buffer to read from.
* \param[in] Length Number of bytes to read for the currently selected pipe into the buffer.
* \param[in] BytesProcessed Pointer to a location where the total number of bytes already processed should
* updated, \c NULL if the entire stream should be written at once.
*
* \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum.
*/
uint8_t Pipe_Write_EStream_BE(const void* Buffer,
uint16_t Length,
uint16_t* const BytesProcessed) ATTR_NON_NULL_PTR_ARG(1);
/** EEPROM buffer source version of \ref Pipe_Read_Stream_LE().
*
* \param[out] Buffer Pointer to the source data buffer to write to.
* \param[in] Length Number of bytes to read for the currently selected pipe to read from.
* \param[in] BytesProcessed Pointer to a location where the total number of bytes already processed should
* updated, \c NULL if the entire stream should be read at once.
*
* \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum.
*/
uint8_t Pipe_Read_EStream_LE(void* Buffer,
uint16_t Length,
uint16_t* const BytesProcessed) ATTR_NON_NULL_PTR_ARG(1);
/** EEPROM buffer source version of \ref Pipe_Read_Stream_BE().
*
* \param[out] Buffer Pointer to the source data buffer to write to.
* \param[in] Length Number of bytes to read for the currently selected pipe to read from.
* \param[in] BytesProcessed Pointer to a location where the total number of bytes already processed should
* updated, \c NULL if the entire stream should be read at once.
*
* \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum.
*/
uint8_t Pipe_Read_EStream_BE(void* Buffer,
uint16_t Length,
uint16_t* const BytesProcessed) ATTR_NON_NULL_PTR_ARG(1);
//@}
/** \name Stream functions for PROGMEM source/destination data */
//@{
/** FLASH buffer source version of \ref Pipe_Write_Stream_LE().
*
* \pre The FLASH data must be located in the first 64KB of FLASH for this function to work correctly.
*
* \param[in] Buffer Pointer to the source data buffer to read from.
* \param[in] Length Number of bytes to read for the currently selected pipe into the buffer.
* \param[in] BytesProcessed Pointer to a location where the total number of bytes already processed should
* updated, \c NULL if the entire stream should be written at once.
*
* \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum.
*/
uint8_t Pipe_Write_PStream_LE(const void* Buffer,
uint16_t Length,
uint16_t* const BytesProcessed) ATTR_NON_NULL_PTR_ARG(1);
/** FLASH buffer source version of \ref Pipe_Write_Stream_BE().
*
* \pre The FLASH data must be located in the first 64KB of FLASH for this function to work correctly.
*
* \param[in] Buffer Pointer to the source data buffer to read from.
* \param[in] Length Number of bytes to read for the currently selected pipe into the buffer.
* \param[in] BytesProcessed Pointer to a location where the total number of bytes already processed should
* updated, \c NULL if the entire stream should be written at once.
*
* \return A value from the \ref Pipe_Stream_RW_ErrorCodes_t enum.
*/
uint8_t Pipe_Write_PStream_BE(const void* Buffer,
uint16_t Length,
uint16_t* const BytesProcessed) ATTR_NON_NULL_PTR_ARG(1);
//@}
/* Disable C linkage for C++ Compilers: */
#if defined(__cplusplus)
}
#endif
#endif
/** @} */
|
