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
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
|
/*
LUFA Library
Copyright (C) Dean Camera, 2009.
dean [at] fourwalledcubicle [dot] com
www.fourwalledcubicle.com
*/
/*
Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com)
Permission to use, copy, modify, and distribute this software
and its documentation for any purpose and without fee is hereby
granted, 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.
*/
/** \ingroup Group_USB
* @defgroup Group_EndpointManagement Endpoint Management
*
* Functions, macros and enums related to endpoint management when in USB Device mode. This
* module contains the endpoint management macros, as well as endpoint interrupt and data
* send/recieve functions for various data types.
*
* @{
*/
/** @defgroup Group_EndpointRW Endpoint Data Reading and Writing
*
* Functions, macros, variables, enums and types related to data reading and writing from and to endpoints.
*/
/** @defgroup Group_EndpointPacketManagement Endpoint Packet Management
*
* Functions, macros, variables, enums and types related to packet management of endpoints.
*/
#ifndef __ENDPOINT_H__
#define __ENDPOINT_H__
/* Includes: */
#include <avr/io.h>
#include <stdbool.h>
#include "../../../Common/Common.h"
#include "../HighLevel/USBTask.h"
#if !defined(NO_STREAM_CALLBACKS) || defined(__DOXYGEN__)
#include "../HighLevel/StreamCallbacks.h"
#endif
/* Enable C linkage for C++ Compilers: */
#if defined(__cplusplus)
extern "C" {
#endif
/* Public Interface - May be used in end-application: */
/* Macros: */
/** Endpoint data direction mask for \ref Endpoint_ConfigureEndpoint(). This indicates that the endpoint
* should be initialized in the OUT direction - i.e. data flows from host to device.
*/
#define ENDPOINT_DIR_OUT (0 << EPDIR)
/** Endpoint data direction mask for \ref Endpoint_ConfigureEndpoint(). This indicates that the endpoint
* should be initialized in the IN direction - i.e. data flows from device to host.
*/
#define ENDPOINT_DIR_IN (1 << EPDIR)
/** Mask for the bank mode selection for the \ref Endpoint_ConfigureEndpoint() macro. This indicates
* that the endpoint should have one single bank, which requires less USB FIFO memory but results
* in slower transfers as only one USB device (the AVR or the host) can access the endpoint's
* bank at the one time.
*/
#define ENDPOINT_BANK_SINGLE (0 << EPBK0)
/** Mask for the bank mode selection for the \ref Endpoint_ConfigureEndpoint() macro. This indicates
* that the endpoint should have two banks, which requires more USB FIFO memory but results
* in faster transfers as one USB device (the AVR or the host) can access one bank while the other
* accesses the second bank.
*/
#define ENDPOINT_BANK_DOUBLE (1 << EPBK0)
/** Endpoint address for the default control endpoint, which always resides in address 0. This is
* defined for convenience to give more readable code when used with the endpoint macros.
*/
#define ENDPOINT_CONTROLEP 0
#if (!defined(FIXED_CONTROL_ENDPOINT_SIZE) || defined(__DOXYGEN__))
/** Default size of the default control endpoint's bank, until altered by the Endpoint0Size value
* in the device descriptor. Not available if the FIXED_CONTROL_ENDPOINT_SIZE token is defined.
*/
#define ENDPOINT_CONTROLEP_DEFAULT_SIZE 8
#endif
/** Endpoint number mask, for masking against endpoint addresses to retrieve the endpoint's
* numerical address in the device.
*/
#define ENDPOINT_EPNUM_MASK 0x03
/** Endpoint bank size mask, for masking against endpoint addresses to retrieve the endpoint's
* bank size in the device.
*/
#define ENDPOINT_EPSIZE_MASK 0x7FF
/** Maximum size in bytes of a given endpoint.
*
* \param n Endpoint number, a value between 0 and (ENDPOINT_TOTAL_ENDPOINTS - 1)
*/
#define ENDPOINT_MAX_SIZE(n) _ENDPOINT_GET_MAXSIZE(n)
/** Indicates if the given endpoint supports double banking.
*
* \param n Endpoint number, a value between 0 and (ENDPOINT_TOTAL_ENDPOINTS - 1)
*/
#define ENDPOINT_DOUBLEBANK_SUPPORTED(n) _ENDPOINT_GET_DOUBLEBANK(n)
#if !defined(CONTROL_ONLY_DEVICE)
#if defined(USB_FULL_CONTROLLER) || defined(USB_MODIFIED_FULL_CONTROLLER) || defined(__DOXYGEN__)
/** Total number of endpoints (including the default control endpoint at address 0) which may
* be used in the device. Different USB AVR models support different amounts of endpoints,
* this value reflects the maximum number of endpoints for the currently selected AVR model.
*/
#define ENDPOINT_TOTAL_ENDPOINTS 7
#else
#define ENDPOINT_TOTAL_ENDPOINTS 5
#endif
#else
#define ENDPOINT_TOTAL_ENDPOINTS 1
#endif
/** Interrupt definition for the endpoint SETUP interrupt (for CONTROL type endpoints). Should be
* used with the USB_INT_* macros located in USBInterrupt.h.
*
* This interrupt will fire if enabled on a CONTROL type endpoint if a new control packet is
* received from the host.
*
* \note This interrupt must be enabled and cleared on *each* endpoint which requires it (after the
* endpoint is selected), and will fire the common endpoint interrupt vector.
*
* \see \ref ENDPOINT_PIPE_vect for more information on the common pipe and endpoint interrupt vector.
*/
#define ENDPOINT_INT_SETUP UEIENX, (1 << RXSTPE), UEINTX, (1 << RXSTPI)
/** Interrupt definition for the endpoint IN interrupt (for INTERRUPT type endpoints). Should be
* used with the USB_INT_* macros located in USBInterrupt.h.
*
* This interrupt will fire if enabled on an INTERRUPT type endpoint if a the endpoint interrupt
* period has elapsed and the endpoint is ready for a new packet to be written to its FIFO buffer
* (if required).
*
* \note This interrupt must be enabled and cleared on *each* endpoint which requires it (after the
* endpoint is selected), and will fire the common endpoint interrupt vector.
*
* \see \ref ENDPOINT_PIPE_vect for more information on the common pipe and endpoint interrupt vector.
*/
#define ENDPOINT_INT_IN UEIENX, (1 << TXINE) , UEINTX, (1 << TXINI)
/** Interrupt definition for the endpoint OUT interrupt (for INTERRUPT type endpoints). Should be
* used with the USB_INT_* macros located in USBInterrupt.h.
*
* This interrupt will fire if enabled on an INTERRUPT type endpoint if a the endpoint interrupt
* period has elapsed and the endpoint is ready for a packet from the host to be read from its
* FIFO buffer (if received).
*
* \note This interrupt must be enabled and cleared on *each* endpoint which requires it (after the
* endpoint is selected), and will fire the common endpoint interrupt vector.
*
* \see \ref ENDPOINT_PIPE_vect for more information on the common pipe and endpoint interrupt vector.
*/
#define ENDPOINT_INT_OUT UEIENX, (1 << RXOUTE), UEINTX, (1 << RXOUTI)
/* Pseudo-Function Macros: */
#if defined(__DOXYGEN__)
/** Indicates the number of bytes currently stored in the current endpoint's selected bank.
*
* \note The return width of this function may differ, depending on the maximum endpoint bank size
* of the selected AVR model.
*
* \ingroup Group_EndpointRW
*
* \return Total number of bytes in the currently selected Endpoint's FIFO buffer
*/
static inline uint16_t Endpoint_BytesInEndpoint(void);
/** Get the endpoint address of the currently selected endpoint. This is typically used to save
* the currently selected endpoint number so that it can be restored after another endpoint has
* been manipulated.
*
* \return Index of the currently selected endpoint
*/
static inline uint8_t Endpoint_GetCurrentEndpoint(void);
/** Selects the given endpoint number. If the address from the device descriptors is used, the
* value should be masked with the \ref ENDPOINT_EPNUM_MASK constant to extract only the endpoint
* number (and discarding the endpoint direction bit).
*
* Any endpoint operations which do not require the endpoint number to be indicated will operate on
* the currently selected endpoint.
*
* \param EndpointNumber Endpoint number to select
*/
static inline void Endpoint_SelectEndpoint(uint8_t EndpointNumber);
/** Resets the endpoint bank FIFO. This clears all the endpoint banks and resets the USB controller's
* In and Out pointers to the bank's contents.
*
* \param EndpointNumber Endpoint number whose FIFO buffers are to be reset
*/
static inline void Endpoint_ResetFIFO(uint8_t EndpointNumber);
/** Enables the currently selected endpoint so that data can be sent and received through it to
* and from a host.
*
* \note Endpoints must first be configured properly via \ref Endpoint_ConfigureEndpoint().
*/
static inline void Endpoint_EnableEndpoint(void);
/** Disables the currently selected endpoint so that data cannot be sent and received through it
* to and from a host.
*/
static inline void Endpoint_DisableEndpoint(void);
/** Determines if the currently selected endpoint is enabled, but not necessarily configured.
*
* \return Boolean True if the currently selected endpoint is enabled, false otherwise
*/
static inline bool Endpoint_IsEnabled(void);
/** Determines if the currently selected endpoint may be read from (if data is waiting in the endpoint
* bank and the endpoint is an OUT direction, or if the bank is not yet full if the endpoint is an IN
* direction). This function will return false if an error has occurred in the endpoint, if the endpoint
* is an OUT direction and no packet (or an empty packet) has been received, or if the endpoint is an IN
* direction and the endpoint bank is full.
*
* \ingroup Group_EndpointPacketManagement
*
* \return Boolean true if the currently selected endpoint may be read from or written to, depending on its direction
*/
static inline bool Endpoint_IsReadWriteAllowed(void);
/** Determines if the currently selected endpoint is configured.
*
* \return Boolean true if the currently selected endpoint has been configured, false otherwise
*/
static inline bool Endpoint_IsConfigured(void);
/** Returns a mask indicating which INTERRUPT type endpoints have interrupted - i.e. their
* interrupt duration has elapsed. Which endpoints have interrupted can be determined by
* masking the return value against (1 << {Endpoint Number}).
*
* \return Mask whose bits indicate which endpoints have interrupted
*/
static inline uint8_t Endpoint_GetEndpointInterrupts(void);
/** Clears the endpoint interrupt flag. This clears the specified endpoint number's interrupt
* mask in the endpoint interrupt flag register.
*
* \param EndpointNumber Index of the endpoint whose interrupt flag should be cleared
*/
static inline void Endpoint_ClearEndpointInterrupt(uint8_t EndpointNumber);
/** Determines if the specified endpoint number has interrupted (valid only for INTERRUPT type
* endpoints).
*
* \param EndpointNumber Index of the endpoint whose interrupt flag should be tested
*
* \return Boolean true if the specified endpoint has interrupted, false otherwise
*/
static inline bool Endpoint_HasEndpointInterrupted(uint8_t EndpointNumber);
/** Determines if the selected IN endpoint is ready for a new packet.
*
* \ingroup Group_EndpointPacketManagement
*
* \return Boolean true if the current endpoint is ready for an IN packet, false otherwise.
*/
static inline bool Endpoint_IsINReady(void);
/** Determines if the selected OUT endpoint has received new packet.
*
* \ingroup Group_EndpointPacketManagement
*
* \return Boolean true if current endpoint is has received an OUT packet, false otherwise.
*/
static inline bool Endpoint_IsOUTReceived(void);
/** Determines if the current CONTROL type endpoint has received a SETUP packet.
*
* \ingroup Group_EndpointPacketManagement
*
* \return Boolean true if the selected endpoint has received a SETUP packet, false otherwise.
*/
static inline bool Endpoint_IsSETUPReceived(void);
/** Clears a received SETUP packet on the currently selected CONTROL type endpoint, freeing up the
* endpoint for the next packet.
*
* \ingroup Group_EndpointPacketManagement
*
* \note This is not applicable for non CONTROL type endpoints.
*/
static inline void Endpoint_ClearSETUP(void);
/** Sends an IN packet to the host on the currently selected endpoint, freeing up the endpoint for the
* next packet and switching to the alternative endpoint bank if double banked.
*
* \ingroup Group_EndpointPacketManagement
*/
static inline void Endpoint_ClearIN(void);
/** Acknowledges an OUT packet to the host on the currently selected endpoint, freeing up the endpoint
* for the next packet and switching to the alternative endpoint bank if double banked.
*
* \ingroup Group_EndpointPacketManagement
*/
static inline void Endpoint_ClearOUT(void);
/** Stalls the current endpoint, indicating to the host that a logical problem occurred with the
* indicated endpoint and that the current transfer sequence should be aborted. This provides a
* way for devices to indicate invalid commands to the host so that the current transfer can be
* aborted and the host can begin its own recovery sequence.
*
* The currently selected endpoint remains stalled until either the \ref Endpoint_ClearStall() macro
* is called, or the host issues a CLEAR FEATURE request to the device for the currently selected
* endpoint.
*
* \ingroup Group_EndpointPacketManagement
*/
static inline void Endpoint_StallTransaction(void);
/** Clears the STALL condition on the currently selected endpoint.
*
* \ingroup Group_EndpointPacketManagement
*/
static inline void Endpoint_ClearStall(void);
/** Determines if the currently selected endpoint is stalled, false otherwise.
*
* \ingroup Group_EndpointPacketManagement
*
* \return Boolean true if the currently selected endpoint is stalled, false otherwise
*/
static inline bool Endpoint_IsStalled(void);
/** Resets the data toggle of the currently selected endpoint. */
static inline void Endpoint_ResetDataToggle(void);
/** Determines the currently selected endpoint's direction.
*
* \return The currently selected endpoint's direction, as a ENDPOINT_DIR_* mask.
*/
static inline uint8_t Endpoint_GetEndpointDirection(void);
#else
#if defined(USB_FULL_CONTROLLER) || defined(USB_MODIFIED_FULL_CONTROLLER) || defined(__DOXYGEN__)
#define Endpoint_BytesInEndpoint() UEBCX
#else
#define Endpoint_BytesInEndpoint() UEBCLX
#endif
#if !defined(CONTROL_ONLY_DEVICE)
#define Endpoint_GetCurrentEndpoint() (UENUM & ENDPOINT_EPNUM_MASK)
#else
#define Endpoint_GetCurrentEndpoint() ENDPOINT_CONTROLEP
#endif
#if !defined(CONTROL_ONLY_DEVICE)
#define Endpoint_SelectEndpoint(epnum) MACROS{ UENUM = epnum; }MACROE
#else
#define Endpoint_SelectEndpoint(epnum) (void)epnum
#endif
#define Endpoint_ResetFIFO(epnum) MACROS{ UERST = (1 << epnum); UERST = 0; }MACROE
#define Endpoint_EnableEndpoint() MACROS{ UECONX |= (1 << EPEN); }MACROE
#define Endpoint_DisableEndpoint() MACROS{ UECONX &= ~(1 << EPEN); }MACROE
#define Endpoint_IsEnabled() ((UECONX & (1 << EPEN)) ? true : false)
#if !defined(CONTROL_ONLY_DEVICE)
#define Endpoint_IsReadWriteAllowed() ((UEINTX & (1 << RWAL)) ? true : false)
#endif
#define Endpoint_IsConfigured() ((UESTA0X & (1 << CFGOK)) ? true : false)
#define Endpoint_GetEndpointInterrupts() UEINT
#define Endpoint_ClearEndpointInterrupt(n) MACROS{ UEINT &= ~(1 << n); }MACROE
#define Endpoint_HasEndpointInterrupted(n) ((UEINT & (1 << n)) ? true : false)
#define Endpoint_IsINReady() ((UEINTX & (1 << TXINI)) ? true : false)
#define Endpoint_IsOUTReceived() ((UEINTX & (1 << RXOUTI)) ? true : false)
#define Endpoint_IsSETUPReceived() ((UEINTX & (1 << RXSTPI)) ? true : false)
#define Endpoint_ClearSETUP() MACROS{ UEINTX &= ~(1 << RXSTPI); }MACROE
#if !defined(CONTROL_ONLY_DEVICE)
#define Endpoint_ClearIN() MACROS{ uint8_t Temp = UEINTX; UEINTX = (Temp & ~(1 << TXINI)); \
UEINTX = (Temp & ~(1 << FIFOCON)); }MACROE
#else
#define Endpoint_ClearIN() MACROS{ UEINTX &= ~(1 << TXINI); }MACROE
#endif
#if !defined(CONTROL_ONLY_DEVICE)
#define Endpoint_ClearOUT() MACROS{ uint8_t Temp = UEINTX; UEINTX = (Temp & ~(1 << RXOUTI)); \
UEINTX = (Temp & ~(1 << FIFOCON)); }MACROE
#else
#define Endpoint_ClearOUT() MACROS{ UEINTX &= ~(1 << RXOUTI); }MACROE
#endif
#define Endpoint_StallTransaction() MACROS{ UECONX |= (1 << STALLRQ); }MACROE
#define Endpoint_ClearStall() MACROS{ UECONX |= (1 << STALLRQC); }MACROE
#define Endpoint_IsStalled() ((UECONX & (1 << STALLRQ)) ? true : false)
#define Endpoint_ResetDataToggle() MACROS{ UECONX |= (1 << RSTDT); }MACROE
#define Endpoint_GetEndpointDirection() (UECFG0X & ENDPOINT_DIR_IN)
#endif
/* Enums: */
/** Enum for the possible error return codes of the \ref Endpoint_WaitUntilReady() function.
*
* \ingroup Group_EndpointRW
*/
enum Endpoint_WaitUntilReady_ErrorCodes_t
{
ENDPOINT_READYWAIT_NoError = 0, /**< Endpoint is ready for next packet, no error. */
ENDPOINT_READYWAIT_EndpointStalled = 1, /**< The endpoint was stalled during the stream
* transfer by the host or device.
*/
ENDPOINT_READYWAIT_DeviceDisconnected = 2, /**< Device was disconnected from the host while
* waiting for the endpoint to become ready.
*/
ENDPOINT_READYWAIT_Timeout = 3, /**< The host failed to accept or send the next packet
* within the software timeout period set by the
* \ref USB_STREAM_TIMEOUT_MS macro.
*/
};
/** Enum for the possible error return codes of the Endpoint_*_Stream_* functions.
*
* \ingroup Group_EndpointRW
*/
enum Endpoint_Stream_RW_ErrorCodes_t
{
ENDPOINT_RWSTREAM_NoError = 0, /**< Command completed successfully, no error. */
ENDPOINT_RWSTREAM_EndpointStalled = 1, /**< The endpoint was stalled during the stream
* transfer by the host or device.
*/
ENDPOINT_RWSTREAM_DeviceDisconnected = 1, /**< Device was disconnected from the host during
* the transfer.
*/
ENDPOINT_RWSTREAM_Timeout = 2, /**< The host failed to accept or send the next packet
* within the software timeout period set by the
* \ref USB_STREAM_TIMEOUT_MS macro.
*/
ENDPOINT_RWSTREAM_CallbackAborted = 3, /**< Indicates that the stream's callback function
* aborted the transfer early.
*/
};
/** Enum for the possible error return codes of the Endpoint_*_Control_Stream_* functions..
*
* \ingroup Group_EndpointRW
*/
enum Endpoint_ControlStream_RW_ErrorCodes_t
{
ENDPOINT_RWCSTREAM_NoError = 0, /**< Command completed successfully, no error. */
ENDPOINT_RWCSTREAM_HostAborted = 1, /**< The aborted the transfer prematurely. */
};
/* Inline Functions: */
/** Reads one byte from the currently selected endpoint's bank, for OUT direction endpoints.
*
* \ingroup Group_EndpointRW
*
* \return Next byte in the currently selected endpoint's FIFO buffer
*/
static inline uint8_t Endpoint_Read_Byte(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
static inline uint8_t Endpoint_Read_Byte(void)
{
return UEDATX;
}
/** Writes one byte from the currently selected endpoint's bank, for IN direction endpoints.
*
* \ingroup Group_EndpointRW
*
* \param Byte Next byte to write into the the currently selected endpoint's FIFO buffer
*/
static inline void Endpoint_Write_Byte(const uint8_t Byte) ATTR_ALWAYS_INLINE;
static inline void Endpoint_Write_Byte(const uint8_t Byte)
{
UEDATX = Byte;
}
/** Discards one byte from the currently selected endpoint's bank, for OUT direction endpoints.
*
* \ingroup Group_EndpointRW
*/
static inline void Endpoint_Discard_Byte(void) ATTR_ALWAYS_INLINE;
static inline void Endpoint_Discard_Byte(void)
{
uint8_t Dummy;
Dummy = UEDATX;
}
/** Reads two bytes from the currently selected endpoint's bank in little endian format, for OUT
* direction endpoints.
*
* \ingroup Group_EndpointRW
*
* \return Next word in the currently selected endpoint's FIFO buffer
*/
static inline uint16_t Endpoint_Read_Word_LE(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
static inline uint16_t Endpoint_Read_Word_LE(void)
{
uint16_t Data;
Data = UEDATX;
Data |= (((uint16_t)UEDATX) << 8);
return Data;
}
/** Reads two bytes from the currently selected endpoint's bank in big endian format, for OUT
* direction endpoints.
*
* \ingroup Group_EndpointRW
*
* \return Next word in the currently selected endpoint's FIFO buffer
*/
static inline uint16_t Endpoint_Read_Word_BE(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
static inline uint16_t Endpoint_Read_Word_BE(void)
{
uint16_t Data;
Data = (((uint16_t)UEDATX) << 8);
Data |= UEDATX;
return Data;
}
/** Writes two bytes to the currently selected endpoint's bank in little endian format, for IN
* direction endpoints.
*
* \ingroup Group_EndpointRW
*
* \param Word Next word to write to the currently selected endpoint's FIFO buffer
*/
static inline void Endpoint_Write_Word_LE(const uint16_t Word) ATTR_ALWAYS_INLINE;
static inline void Endpoint_Write_Word_LE(const uint16_t Word)
{
UEDATX = (Word & 0xFF);
UEDATX = (Word >> 8);
}
/** Writes two bytes to the currently selected endpoint's bank in big endian format, for IN
* direction endpoints.
*
* \ingroup Group_EndpointRW
*
* \param Word Next word to write to the currently selected endpoint's FIFO buffer
*/
static inline void Endpoint_Write_Word_BE(const uint16_t Word) ATTR_ALWAYS_INLINE;
static inline void Endpoint_Write_Word_BE(const uint16_t Word)
{
UEDATX = (Word >> 8);
UEDATX = (Word & 0xFF);
}
/** Discards two bytes from the currently selected endpoint's bank, for OUT direction endpoints.
*
* \ingroup Group_EndpointRW
*/
static inline void Endpoint_Discard_Word(void) ATTR_ALWAYS_INLINE;
static inline void Endpoint_Discard_Word(void)
{
uint8_t Dummy;
Dummy = UEDATX;
Dummy = UEDATX;
}
/** Reads four bytes from the currently selected endpoint's bank in little endian format, for OUT
* direction endpoints.
*
* \ingroup Group_EndpointRW
*
* \return Next double word in the currently selected endpoint's FIFO buffer
*/
static inline uint32_t Endpoint_Read_DWord_LE(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
static inline uint32_t Endpoint_Read_DWord_LE(void)
{
union
{
uint32_t DWord;
uint8_t Bytes[4];
} Data;
Data.Bytes[0] = UEDATX;
Data.Bytes[1] = UEDATX;
Data.Bytes[2] = UEDATX;
Data.Bytes[3] = UEDATX;
return Data.DWord;
}
/** Reads four bytes from the currently selected endpoint's bank in big endian format, for OUT
* direction endpoints.
*
* \ingroup Group_EndpointRW
*
* \return Next double word in the currently selected endpoint's FIFO buffer
*/
static inline uint32_t Endpoint_Read_DWord_BE(void) ATTR_WARN_UNUSED_RESULT ATTR_ALWAYS_INLINE;
static inline uint32_t Endpoint_Read_DWord_BE(void)
{
union
{
uint32_t DWord;
uint8_t Bytes[4];
} Data;
Data.Bytes[3] = UEDATX;
Data.Bytes[2] = UEDATX;
Data.Bytes[1] = UEDATX;
Data.Bytes[0] = UEDATX;
return Data.DWord;
}
/** Writes four bytes to the currently selected endpoint's bank in little endian format, for IN
* direction endpoints.
*
* \ingroup Group_EndpointRW
*
* \param DWord Next double word to write to the currently selected endpoint's FIFO buffer
*/
static inline void Endpoint_Write_DWord_LE(const uint32_t DWord) ATTR_ALWAYS_INLINE;
static inline void Endpoint_Write_DWord_LE(const uint32_t DWord)
{
UEDATX = (DWord & 0xFF);
UEDATX = (DWord >> 8);
UEDATX = (DWord >> 16);
UEDATX = (DWord >> 24);
}
/** Writes four bytes to the currently selected endpoint's bank in big endian format, for IN
* direction endpoints.
*
* \ingroup Group_EndpointRW
*
* \param DWord Next double word to write to the currently selected endpoint's FIFO buffer
*/
static inline void Endpoint_Write_DWord_BE(const uint32_t DWord) ATTR_ALWAYS_INLINE;
static inline void Endpoint_Write_DWord_BE(const uint32_t DWord)
{
UEDATX = (DWord >> 24);
UEDATX = (DWord >> 16);
UEDATX = (DWord >> 8);
UEDATX = (DWord & 0xFF);
}
/** Discards four bytes from the currently selected endpoint's bank, for OUT direction endpoints.
*
* \ingroup Group_EndpointRW
*/
static inline void Endpoint_Discard_DWord(void) ATTR_ALWAYS_INLINE;
static inline void Endpoint_Discard_DWord(void)
{
uint8_t Dummy;
Dummy = UEDATX;
Dummy = UEDATX;
Dummy = UEDATX;
Dummy = UEDATX;
}
/* External Variables: */
/** Global indicating the maximum packet size of the default control endpoint located at address
* 0 in the device. This value is set to the value indicated in the device descriptor in the user
* project once the USB interface is initialized into device mode.
*
* If space is an issue, it is possible to fix this to a static value by defining the control
* endpoint size in the FIXED_CONTROL_ENDPOINT_SIZE token passed to the compiler in the makefile
* via the -D switch. When a fixed control endpoint size is used, the size is no longer dynamically
* read from the descriptors at runtime and instead fixed to the given value. When used, it is
* important that the descriptor control endpoint size value matches the size given as the
* FIXED_CONTROL_ENDPOINT_SIZE token - it is recommended that the FIXED_CONTROL_ENDPOINT_SIZE token
* be used in the descriptors to ensure this.
*
* \note This variable should be treated as read-only in the user application, and never manually
* changed in value.
*/
#if (!defined(FIXED_CONTROL_ENDPOINT_SIZE) || defined(__DOXYGEN__))
extern uint8_t USB_ControlEndpointSize;
#else
#define USB_ControlEndpointSize FIXED_CONTROL_ENDPOINT_SIZE
#endif
/* Function Prototypes: */
/** Configures the specified endpoint number with the given endpoint type, direction, bank size
* and banking mode. Endpoints should be allocated in ascending order by their address in the
* device (i.e. endpoint 1 should be configured before endpoint 2 and so on).
*
* The endpoint type may be one of the EP_TYPE_* macros listed in LowLevel.h and the direction
* may be either \ref ENDPOINT_DIR_OUT or \ref ENDPOINT_DIR_IN.
*
* The bank size must indicate the maximum packet size that the endpoint can handle. Different
* endpoint numbers can handle different maximum packet sizes - refer to the chosen USB AVR's
* datasheet to determine the maximum bank size for each endpoint.
*
* The banking mode may be either \ref ENDPOINT_BANK_SINGLE or \ref ENDPOINT_BANK_DOUBLE.
*
* The success of this routine can be determined via the \ref Endpoint_IsConfigured() macro.
*
* \note This routine will select the specified endpoint, and the endpoint will remain selected
* once the routine completes regardless of if the endpoint configuration succeeds.
*
* \return Boolean true if the configuration succeeded, false otherwise
*/
bool Endpoint_ConfigureEndpoint(const uint8_t Number, const uint8_t Type, const uint8_t Direction,
const uint16_t Size, const uint8_t Banks);
#if !defined(CONTROL_ONLY_DEVICE)
/** Spinloops until the currently selected non-control endpoint is ready for the next packet of data
* to be read or written to it.
*
* \note This routine should not be called on CONTROL type endpoints.
*
* \ingroup Group_EndpointRW
*
* \return A value from the \ref Endpoint_WaitUntilReady_ErrorCodes_t enum.
*/
uint8_t Endpoint_WaitUntilReady(void);
/** Reads and discards the given number of bytes from the endpoint from the given buffer,
* 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 host via the \ref Endpoint_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.
*
* The callback routine should be created using the \ref STREAM_CALLBACK() macro. If the token
* NO_STREAM_CALLBACKS is passed via the -D option to the compiler, stream callbacks are disabled
* and this function has the Callback parameter omitted.
*
* \note This routine should not be used on CONTROL type endpoints.
*
* \ingroup Group_EndpointRW
*
* \param Length Number of bytes to send via the currently selected endpoint.
* \param Callback Name of a callback routine to call between successive USB packet transfers, NULL if no callback
*
* \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
*/
uint8_t Endpoint_Discard_Stream(uint16_t Length
#if !defined(NO_STREAM_CALLBACKS) || defined(__DOXYGEN__)
, uint8_t (* const Callback)(void)
#endif
);
/** Writes the given number of bytes to the endpoint from the given buffer in little endian,
* sending full packets to the host 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 Endpoint_ClearIN() macro. Between each USB packet, the given stream callback function
* is executed repeatedly until the endpoint is ready to accept the next packet, allowing for early
* aborts of stream transfers.
*
* The callback routine should be created using the \ref STREAM_CALLBACK() macro. If the token
* NO_STREAM_CALLBACKS is passed via the -D option to the compiler, stream callbacks are disabled
* and this function has the Callback parameter omitted.
*
* \note This routine should not be used on CONTROL type endpoints.
*
* \ingroup Group_EndpointRW
*
* \param Buffer Pointer to the source data buffer to read from.
* \param Length Number of bytes to read for the currently selected endpoint into the buffer.
* \param Callback Name of a callback routine to call between successive USB packet transfers, NULL if no callback
*
* \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
*/
uint8_t Endpoint_Write_Stream_LE(const void* Buffer, uint16_t Length
#if !defined(NO_STREAM_CALLBACKS) || defined(__DOXYGEN__)
, uint8_t (* const Callback)(void)
#endif
) ATTR_NON_NULL_PTR_ARG(1);
/** Writes the given number of bytes to the endpoint from the given buffer in big endian,
* sending full packets to the host 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 Endpoint_ClearIN() macro. Between each USB packet, the given stream callback function
* is executed repeatedly until the endpoint is ready to accept the next packet, allowing for early
* aborts of stream transfers.
*
* The callback routine should be created using the \ref STREAM_CALLBACK() macro. If the token
* NO_STREAM_CALLBACKS is passed via the -D option to the compiler, stream callbacks are disabled
* and this function has the Callback parameter omitted.
*
* \note This routine should not be used on CONTROL type endpoints.
*
* \ingroup Group_EndpointRW
*
* \param Buffer Pointer to the source data buffer to read from.
* \param Length Number of bytes to read for the currently selected endpoint into the buffer.
* \param Callback Name of a callback routine to call between successive USB packet transfers, NULL if no callback
*
* \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
*/
uint8_t Endpoint_Write_Stream_BE(const void* Buffer, uint16_t Length
#if !defined(NO_STREAM_CALLBACKS) || defined(__DOXYGEN__)
, uint8_t (* const Callback)(void)
#endif
) ATTR_NON_NULL_PTR_ARG(1);
/** Reads the given number of bytes from the endpoint from the given buffer in little endian,
* 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 host via the \ref Endpoint_ClearOUT() macro. Between
* each USB packet, the given stream callback function is executed repeatedly until the endpoint
* is ready to accept the next packet, allowing for early aborts of stream transfers.
*
* The callback routine should be created using the \ref STREAM_CALLBACK() macro. If the token
* NO_STREAM_CALLBACKS is passed via the -D option to the compiler, stream callbacks are disabled
* and this function has the Callback parameter omitted.
*
* \note This routine should not be used on CONTROL type endpoints.
*
* \ingroup Group_EndpointRW
*
* \param Buffer Pointer to the destination data buffer to write to.
* \param Length Number of bytes to send via the currently selected endpoint.
* \param Callback Name of a callback routine to call between successive USB packet transfers, NULL if no callback
*
* \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
*/
uint8_t Endpoint_Read_Stream_LE(void* Buffer, uint16_t Length
#if !defined(NO_STREAM_CALLBACKS) || defined(__DOXYGEN__)
, uint8_t (* const Callback)(void)
#endif
) ATTR_NON_NULL_PTR_ARG(1);
/** Reads the given number of bytes from the endpoint from the given buffer in big endian,
* 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 host via the \ref Endpoint_ClearOUT() macro. Between
* each USB packet, the given stream callback function is executed repeatedly until the endpoint
* is ready to accept the next packet, allowing for early aborts of stream transfers.
*
* The callback routine should be created using the \ref STREAM_CALLBACK() macro. If the token
* NO_STREAM_CALLBACKS is passed via the -D option to the compiler, stream callbacks are disabled
* and this function has the Callback parameter omitted.
*
* \note This routine should not be used on CONTROL type endpoints.
*
* \ingroup Group_EndpointRW
*
* \param Buffer Pointer to the destination data buffer to write to.
* \param Length Number of bytes to send via the currently selected endpoint.
* \param Callback Name of a callback routine to call between successive USB packet transfers, NULL if no callback
*
* \return A value from the \ref Endpoint_Stream_RW_ErrorCodes_t enum.
*/
uint8_t Endpoint_Read_Stream_BE(void* Buffer, uint16_t Length
#if !defined(NO_STREAM_CALLBACKS) || defined(__DOXYGEN__)
, uint8_t (* const Callback)(void)
#endif
) ATTR_NON_NULL_PTR_ARG(1);
#endif
/** Writes the given number of bytes to the CONTROL type endpoint from the given buffer in little endian,
* sending full packets to the host as needed. The host OUT acknowledgement is not automatically cleared
* in both failure and success states; the user is responsible for manually clearing the setup OUT to
* finalize the transfer via the \ref Endpoint_ClearOUT() macro.
*
* \note This routine should only be used on CONTROL type endpoints.
*
* \warning Unlike the standard stream read/write commands, the control stream commands cannot be chained
* together; i.e. the entire stream data must be read or written at the one time.
*
* \ingroup Group_EndpointRW
*
* \param Buffer Pointer to the source data buffer to read from.
* \param Length Number of bytes to read for the currently selected endpoint into the buffer.
*
* \return A value from the \ref Endpoint_ControlStream_RW_ErrorCodes_t enum.
*/
uint8_t Endpoint_Write_Control_Stream_LE(const void* Buffer, uint16_t Length) ATTR_NON_NULL_PTR_ARG(1);
/** Writes the given number of bytes to the CONTROL type endpoint from the given buffer in big endian,
* sending full packets to the host as needed. The host OUT acknowledgement is not automatically cleared
* in both failure and success states; the user is responsible for manually clearing the setup OUT to
* finalize the transfer via the \ref Endpoint_ClearOUT() macro.
*
* \note This routine should only be used on CONTROL type endpoints.
*
* \warning Unlike the standard stream read/write commands, the control stream commands cannot be chained
* together; i.e. the entire stream data must be read or written at the one time.
*
* \ingroup Group_EndpointRW
*
* \param Buffer Pointer to the source data buffer to read from.
* \param Length Number of bytes to read for the currently selected endpoint into the buffer.
*
* \return A value from the \ref Endpoint_ControlStream_RW_ErrorCodes_t enum.
*/
uint8_t Endpoint_Write_Control_Stream_BE(const void* Buffer, uint16_t Length) ATTR_NON_NULL_PTR_ARG(1);
/** Reads the given number of bytes from the CONTROL endpoint from the given buffer in little endian,
* discarding fully read packets from the host as needed. The device IN acknowledgement is not
* automatically sent after success or failure states; the user is responsible for manually sending the
* setup IN to finalize the transfer via the \ref Endpoint_ClearIN() macro.
*
* \note This routine should only be used on CONTROL type endpoints.
*
* \warning Unlike the standard stream read/write commands, the control stream commands cannot be chained
* together; i.e. the entire stream data must be read or written at the one time.
*
* \ingroup Group_EndpointRW
*
* \param Buffer Pointer to the destination data buffer to write to.
* \param Length Number of bytes to send via the currently selected endpoint.
*
* \return A value from the \ref Endpoint_ControlStream_RW_ErrorCodes_t enum.
*/
uint8_t Endpoint_Read_Control_Stream_LE(void* Buffer, uint16_t Length) ATTR_NON_NULL_PTR_ARG(1);
/** Reads the given number of bytes from the CONTROL endpoint from the given buffer in big endian,
* discarding fully read packets from the host as needed. The device IN acknowledgement is not
* automatically sent after success or failure states; the user is responsible for manually sending the
* setup IN to finalize the transfer via the \ref Endpoint_ClearIN() macro.
*
* \note This routine should only be used on CONTROL type endpoints.
*
* \warning Unlike the standard stream read/write commands, the control stream commands cannot be chained
* together; i.e. the entire stream data must be read or written at the one time.
*
* \ingroup Group_EndpointRW
*
* \param Buffer Pointer to the destination data buffer to write to.
* \param Length Number of bytes to send via the currently selected endpoint.
*
* \return A value from the \ref Endpoint_ControlStream_RW_ErrorCodes_t enum.
*/
uint8_t Endpoint_Read_Control_Stream_BE(void* Buffer, uint16_t Length) ATTR_NON_NULL_PTR_ARG(1);
/* Private Interface - For use in library only: */
#if !defined(__DOXYGEN__)
/* Macros: */
#define Endpoint_AllocateMemory() MACROS{ UECFG1X |= (1 << ALLOC); }MACROE
#define Endpoint_DeallocateMemory() MACROS{ UECFG1X &= ~(1 << ALLOC); }MACROE
#define _ENDPOINT_GET_MAXSIZE(n) _ENDPOINT_GET_MAXSIZE2(ENDPOINT_DETAILS_EP ## n)
#define _ENDPOINT_GET_MAXSIZE2(details) _ENDPOINT_GET_MAXSIZE3(details)
#define _ENDPOINT_GET_MAXSIZE3(maxsize, db) maxsize
#define _ENDPOINT_GET_DOUBLEBANK(n) _ENDPOINT_GET_DOUBLEBANK2(ENDPOINT_DETAILS_EP ## n)
#define _ENDPOINT_GET_DOUBLEBANK2(details) _ENDPOINT_GET_DOUBLEBANK3(details)
#define _ENDPOINT_GET_DOUBLEBANK3(maxsize, db) db
#if defined(USB_FULL_CONTROLLER) || defined(USB_MODIFIED_FULL_CONTROLLER)
#define ENDPOINT_DETAILS_EP0 64, true
#define ENDPOINT_DETAILS_EP1 256, true
#define ENDPOINT_DETAILS_EP2 64, true
#define ENDPOINT_DETAILS_EP3 64, true
#define ENDPOINT_DETAILS_EP4 64, true
#define ENDPOINT_DETAILS_EP5 64, true
#define ENDPOINT_DETAILS_EP6 64, true
#else
#define ENDPOINT_DETAILS_EP0 64, true
#define ENDPOINT_DETAILS_EP1 64, false
#define ENDPOINT_DETAILS_EP2 64, false
#define ENDPOINT_DETAILS_EP3 64, true
#define ENDPOINT_DETAILS_EP4 64, true
#endif
#define Endpoint_ConfigureEndpoint(Number, Type, Direction, Size, Banks) \
Endpoint_ConfigureEndpoint_Prv(Number, \
((Type << EPTYPE0) | Direction), \
((1 << ALLOC) | Banks | \
(__builtin_constant_p(Size) ? \
Endpoint_BytesToEPSizeMask(Size) : \
Endpoint_BytesToEPSizeMaskDynamic(Size))))
/* Function Prototypes: */
void Endpoint_ClearEndpoints(void);
uint8_t Endpoint_BytesToEPSizeMaskDynamic(const uint16_t Size);
bool Endpoint_ConfigureEndpoint_Prv(const uint8_t Number, const uint8_t UECFG0XData, const uint8_t UECFG1XData);
/* Inline Functions: */
static inline uint8_t Endpoint_BytesToEPSizeMask(const uint16_t Bytes) ATTR_WARN_UNUSED_RESULT ATTR_CONST ATTR_ALWAYS_INLINE;
static inline uint8_t Endpoint_BytesToEPSizeMask(const uint16_t Bytes)
{
uint8_t MaskVal = 0;
uint16_t CheckBytes = 8;
while (CheckBytes < Bytes)
{
MaskVal++;
CheckBytes <<= 1;
}
return (MaskVal << EPSIZE0);
};
#endif
/* Disable C linkage for C++ Compilers: */
#if defined(__cplusplus)
}
#endif
#endif
/** @} */
|