aboutsummaryrefslogtreecommitdiff
path: root/libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32F4/stm32f4xx_hal_pcd.c
blob: 8b532b5e7b31f1c8f69b77960c6cf754c5a066be (plain) (blame)
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
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
/**
  ******************************************************************************
  * @file    stm32f4xx_hal_pcd.c
  * @author  MCD Application Team
  * @version V1.4.1
  * @date    09-October-2015
  * @brief   PCD HAL module driver.
  *          This file provides firmware functions to manage the following 
  *          functionalities of the USB Peripheral Controller:
  *           + Initialization and de-initialization functions
  *           + IO operation functions
  *           + Peripheral Control functions 
  *           + Peripheral State functions
  *         
  @verbatim
  ==============================================================================
                    ##### How to use this driver #####
  ==============================================================================
    [..]
      The PCD HAL driver can be used as follows:

     (#) Declare a PCD_HandleTypeDef handle structure, for example:
         PCD_HandleTypeDef  hpcd;
        
     (#) Fill parameters of Init structure in HCD handle
  
     (#) Call HAL_PCD_Init() API to initialize the PCD peripheral (Core, Device core, ...) 

     (#) Initialize the PCD low level resources through the HAL_PCD_MspInit() API:
         (##) Enable the PCD/USB Low Level interface clock using 
              (+++) __HAL_RCC_USB_OTG_FS_CLK_ENABLE();
              (+++) __HAL_RCC_USB_OTG_HS_CLK_ENABLE(); (For High Speed Mode)
           
         (##) Initialize the related GPIO clocks
         (##) Configure PCD pin-out
         (##) Configure PCD NVIC interrupt
    
     (#)Associate the Upper USB device stack to the HAL PCD Driver:
         (##) hpcd.pData = pdev;

     (#)Enable PCD transmission and reception:
         (##) HAL_PCD_Start();

  @endverbatim
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
  *
  * Redistribution and use in source and binary forms, with or without modification,
  * are permitted provided that the following conditions are met:
  *   1. Redistributions of source code must retain the above copyright notice,
  *      this list of conditions and the following disclaimer.
  *   2. Redistributions in binary form must reproduce the above copyright notice,
  *      this list of conditions and the following disclaimer in the documentation
  *      and/or other materials provided with the distribution.
  *   3. Neither the name of STMicroelectronics nor the names of its contributors
  *      may be used to endorse or promote products derived from this software
  *      without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *
  ******************************************************************************
  */ 

/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_hal.h"

/** @addtogroup STM32F4xx_HAL_Driver
  * @{
  */

/** @defgroup PCD PCD
  * @brief PCD HAL module driver
  * @{
  */

#ifdef HAL_PCD_MODULE_ENABLED
#if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx) || defined(STM32F417xx) || \
    defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) || \
    defined(STM32F401xC) || defined(STM32F401xE) || defined(STM32F411xE) || defined(STM32F446xx) || \
    defined(STM32F469xx) || defined(STM32F479xx) 
/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
/* Private macros ------------------------------------------------------------*/
/** @defgroup PCD_Private_Macros PCD Private Macros
  * @{
  */ 
#define PCD_MIN(a, b)  (((a) < (b)) ? (a) : (b))
#define PCD_MAX(a, b)  (((a) > (b)) ? (a) : (b))
/**
  * @}
  */

/* Private functions prototypes ----------------------------------------------*/
/** @defgroup PCD_Private_Functions PCD Private Functions
  * @{
  */
static HAL_StatusTypeDef PCD_WriteEmptyTxFifo(PCD_HandleTypeDef *hpcd, uint32_t epnum);
/**
  * @}
  */

/* Exported functions --------------------------------------------------------*/
/** @defgroup PCD_Exported_Functions PCD Exported Functions
  * @{
  */

/** @defgroup PCD_Exported_Functions_Group1 Initialization and de-initialization functions 
 *  @brief    Initialization and Configuration functions 
 *
@verbatim 
 ===============================================================================
            ##### Initialization and de-initialization functions #####
 ===============================================================================
    [..]  This section provides functions allowing to:
 
@endverbatim
  * @{
  */

/**
  * @brief  Initializes the PCD according to the specified
  *         parameters in the PCD_InitTypeDef and initialize the associated handle.
  * @param  hpcd: PCD handle
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_PCD_Init(PCD_HandleTypeDef *hpcd)
{ 
  uint32_t i = 0;
  
  /* Check the PCD handle allocation */
  if(hpcd == NULL)
  {
    return HAL_ERROR;
  }
  
  /* Check the parameters */
  assert_param(IS_PCD_ALL_INSTANCE(hpcd->Instance));

  hpcd->State = HAL_PCD_STATE_BUSY;
  
  /* Init the low level hardware : GPIO, CLOCK, NVIC... */
  HAL_PCD_MspInit(hpcd);

  /* Disable the Interrupts */
 __HAL_PCD_DISABLE(hpcd);
 
 /*Init the Core (common init.) */
 USB_CoreInit(hpcd->Instance, hpcd->Init);
 
 /* Force Device Mode*/
 USB_SetCurrentMode(hpcd->Instance , USB_OTG_DEVICE_MODE);
 
 /* Init endpoints structures */
 for (i = 0; i < 15 ; i++)
 {
   /* Init ep structure */
   hpcd->IN_ep[i].is_in = 1;
   hpcd->IN_ep[i].num = i;
   hpcd->IN_ep[i].tx_fifo_num = i;
   /* Control until ep is activated */
   hpcd->IN_ep[i].type = EP_TYPE_CTRL;
   hpcd->IN_ep[i].maxpacket =  0;
   hpcd->IN_ep[i].xfer_buff = 0;
   hpcd->IN_ep[i].xfer_len = 0;
 }
 
 for (i = 0; i < 15 ; i++)
 {
   hpcd->OUT_ep[i].is_in = 0;
   hpcd->OUT_ep[i].num = i;
   hpcd->IN_ep[i].tx_fifo_num = i;
   /* Control until ep is activated */
   hpcd->OUT_ep[i].type = EP_TYPE_CTRL;
   hpcd->OUT_ep[i].maxpacket = 0;
   hpcd->OUT_ep[i].xfer_buff = 0;
   hpcd->OUT_ep[i].xfer_len = 0;
   
   hpcd->Instance->DIEPTXF[i] = 0;
 }
 
 /* Init Device */
 USB_DevInit(hpcd->Instance, hpcd->Init);
 
 hpcd->State= HAL_PCD_STATE_READY;
 
#ifdef USB_OTG_GLPMCFG_LPMEN
 /* Activate LPM */
 if (hpcd->Init.lpm_enable == 1)
 {
   HAL_PCDEx_ActivateLPM(hpcd);
 }
#endif /* USB_OTG_GLPMCFG_LPMEN */
 
#ifdef USB_OTG_GCCFG_BCDEN
 /* Activate Battery charging */
 if (hpcd->Init.battery_charging_enable ==1)
 {
   HAL_PCDEx_ActivateBCD(hpcd);
 }
#endif /* USB_OTG_GCCFG_BCDEN */
 
 USB_DevDisconnect (hpcd->Instance);  
 return HAL_OK;
}

/**
  * @brief  DeInitializes the PCD peripheral. 
  * @param  hpcd: PCD handle
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_PCD_DeInit(PCD_HandleTypeDef *hpcd)
{
  /* Check the PCD handle allocation */
  if(hpcd == NULL)
  {
    return HAL_ERROR;
  }

  hpcd->State = HAL_PCD_STATE_BUSY;
  
  /* Stop Device */
  HAL_PCD_Stop(hpcd);
    
  /* DeInit the low level hardware */
  HAL_PCD_MspDeInit(hpcd);
  
  hpcd->State = HAL_PCD_STATE_RESET; 
  
  return HAL_OK;
}

/**
  * @brief  Initializes the PCD MSP.
  * @param  hpcd: PCD handle
  * @retval None
  */
__weak void HAL_PCD_MspInit(PCD_HandleTypeDef *hpcd)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_PCD_MspInit could be implemented in the user file
   */
}

/**
  * @brief  DeInitializes PCD MSP.
  * @param  hpcd: PCD handle
  * @retval None
  */
__weak void HAL_PCD_MspDeInit(PCD_HandleTypeDef *hpcd)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_PCD_MspDeInit could be implemented in the user file
   */
}

/**
  * @}
  */

/** @defgroup PCD_Exported_Functions_Group2 Input and Output operation functions 
 *  @brief   Data transfers functions 
 *
@verbatim 
 ===============================================================================
                      ##### IO operation functions #####
 ===============================================================================  
    [..]
    This subsection provides a set of functions allowing to manage the PCD data 
    transfers.

@endverbatim
  * @{
  */
  
/**
  * @brief  Start The USB OTG Device.
  * @param  hpcd: PCD handle
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_PCD_Start(PCD_HandleTypeDef *hpcd)
{ 
  __HAL_LOCK(hpcd); 
  USB_DevConnect (hpcd->Instance);  
  __HAL_PCD_ENABLE(hpcd);
  __HAL_UNLOCK(hpcd); 
  return HAL_OK;
}

/**
  * @brief  Stop The USB OTG Device.
  * @param  hpcd: PCD handle
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_PCD_Stop(PCD_HandleTypeDef *hpcd)
{ 
  __HAL_LOCK(hpcd); 
  __HAL_PCD_DISABLE(hpcd);
  USB_StopDevice(hpcd->Instance);
  USB_DevDisconnect(hpcd->Instance);
  __HAL_UNLOCK(hpcd); 
  return HAL_OK;
}

/**
  * @brief  Handles PCD interrupt request.
  * @param  hpcd: PCD handle
  * @retval HAL status
  */
void HAL_PCD_IRQHandler(PCD_HandleTypeDef *hpcd)
{
  USB_OTG_GlobalTypeDef *USBx = hpcd->Instance;
  uint32_t i = 0, ep_intr = 0, epint = 0, epnum = 0;
  uint32_t fifoemptymsk = 0, temp = 0;
  USB_OTG_EPTypeDef *ep;
    
  /* ensure that we are in device mode */
  if (USB_GetMode(hpcd->Instance) == USB_OTG_MODE_DEVICE)
  {
    /* avoid spurious interrupt */
    if(__HAL_PCD_IS_INVALID_INTERRUPT(hpcd)) 
    {
      return;
    }
    
    if(__HAL_PCD_GET_FLAG(hpcd, USB_OTG_GINTSTS_MMIS))
    {
     /* incorrect mode, acknowledge the interrupt */
      __HAL_PCD_CLEAR_FLAG(hpcd, USB_OTG_GINTSTS_MMIS);
    }
    
    if(__HAL_PCD_GET_FLAG(hpcd, USB_OTG_GINTSTS_OEPINT))
    {
      epnum = 0;
      
      /* Read in the device interrupt bits */
      ep_intr = USB_ReadDevAllOutEpInterrupt(hpcd->Instance);
      
      while ( ep_intr )
      {
        if (ep_intr & 0x1)
        {
          epint = USB_ReadDevOutEPInterrupt(hpcd->Instance, epnum);
          
          if(( epint & USB_OTG_DOEPINT_XFRC) == USB_OTG_DOEPINT_XFRC)
          {
            CLEAR_OUT_EP_INTR(epnum, USB_OTG_DOEPINT_XFRC);
            
            if(hpcd->Init.dma_enable == 1)
            {
              hpcd->OUT_ep[epnum].xfer_count = hpcd->OUT_ep[epnum].maxpacket- (USBx_OUTEP(epnum)->DOEPTSIZ & USB_OTG_DOEPTSIZ_XFRSIZ); 
              hpcd->OUT_ep[epnum].xfer_buff += hpcd->OUT_ep[epnum].maxpacket;            
            }
            
            HAL_PCD_DataOutStageCallback(hpcd, epnum);
            if(hpcd->Init.dma_enable == 1)
            {
              if((epnum == 0) && (hpcd->OUT_ep[epnum].xfer_len == 0))
              {
                 /* this is ZLP, so prepare EP0 for next setup */
                USB_EP0_OutStart(hpcd->Instance, 1, (uint8_t *)hpcd->Setup);
              }              
            }
          }
          
          if(( epint & USB_OTG_DOEPINT_STUP) == USB_OTG_DOEPINT_STUP)
          {
            /* Inform the upper layer that a setup packet is available */
            HAL_PCD_SetupStageCallback(hpcd);
            CLEAR_OUT_EP_INTR(epnum, USB_OTG_DOEPINT_STUP);
          }
          
          if(( epint & USB_OTG_DOEPINT_OTEPDIS) == USB_OTG_DOEPINT_OTEPDIS)
          {
            CLEAR_OUT_EP_INTR(epnum, USB_OTG_DOEPINT_OTEPDIS);
          }
        }
        epnum++;
        ep_intr >>= 1;
      }
    }
    
    if(__HAL_PCD_GET_FLAG(hpcd, USB_OTG_GINTSTS_IEPINT))
    {
      /* Read in the device interrupt bits */
      ep_intr = USB_ReadDevAllInEpInterrupt(hpcd->Instance);
      
      epnum = 0;
      
      while ( ep_intr )
      {
        if (ep_intr & 0x1) /* In ITR */
        {
          epint = USB_ReadDevInEPInterrupt(hpcd->Instance, epnum);

           if(( epint & USB_OTG_DIEPINT_XFRC) == USB_OTG_DIEPINT_XFRC)
          {
            fifoemptymsk = 0x1 << epnum;
            USBx_DEVICE->DIEPEMPMSK &= ~fifoemptymsk;
            
            CLEAR_IN_EP_INTR(epnum, USB_OTG_DIEPINT_XFRC);
            
            if (hpcd->Init.dma_enable == 1)
            {
              hpcd->IN_ep[epnum].xfer_buff += hpcd->IN_ep[epnum].maxpacket; 
            }
                                      
            HAL_PCD_DataInStageCallback(hpcd, epnum);

            if (hpcd->Init.dma_enable == 1)
            {
              /* this is ZLP, so prepare EP0 for next setup */
              if((epnum == 0) && (hpcd->IN_ep[epnum].xfer_len == 0))
              {
                /* prepare to rx more setup packets */
                USB_EP0_OutStart(hpcd->Instance, 1, (uint8_t *)hpcd->Setup);
              }
            }           
          }
           if(( epint & USB_OTG_DIEPINT_TOC) == USB_OTG_DIEPINT_TOC)
          {
            CLEAR_IN_EP_INTR(epnum, USB_OTG_DIEPINT_TOC);
          }
          if(( epint & USB_OTG_DIEPINT_ITTXFE) == USB_OTG_DIEPINT_ITTXFE)
          {
            CLEAR_IN_EP_INTR(epnum, USB_OTG_DIEPINT_ITTXFE);
          }
          if(( epint & USB_OTG_DIEPINT_INEPNE) == USB_OTG_DIEPINT_INEPNE)
          {
            CLEAR_IN_EP_INTR(epnum, USB_OTG_DIEPINT_INEPNE);
          }
          if(( epint & USB_OTG_DIEPINT_EPDISD) == USB_OTG_DIEPINT_EPDISD)
          {
            CLEAR_IN_EP_INTR(epnum, USB_OTG_DIEPINT_EPDISD);
          }       
          if(( epint & USB_OTG_DIEPINT_TXFE) == USB_OTG_DIEPINT_TXFE)
          {
            PCD_WriteEmptyTxFifo(hpcd , epnum);
          }
        }
        epnum++;
        ep_intr >>= 1;
      }
    }
    
    /* Handle Resume Interrupt */
    if(__HAL_PCD_GET_FLAG(hpcd, USB_OTG_GINTSTS_WKUINT))
    {    
      /* Clear the Remote Wake-up Signaling */
      USBx_DEVICE->DCTL &= ~USB_OTG_DCTL_RWUSIG;

#ifdef USB_OTG_GLPMCFG_LPMEN
      if(hpcd->LPM_State == LPM_L1)
      {
        hpcd->LPM_State = LPM_L0;
        HAL_PCDEx_LPM_Callback(hpcd, PCD_LPM_L0_ACTIVE);
      }
      else
#endif /* USB_OTG_GLPMCFG_LPMEN */
      {
        HAL_PCD_ResumeCallback(hpcd);
      }
      
      __HAL_PCD_CLEAR_FLAG(hpcd, USB_OTG_GINTSTS_WKUINT);
    }
    
    /* Handle Suspend Interrupt */
    if(__HAL_PCD_GET_FLAG(hpcd, USB_OTG_GINTSTS_USBSUSP))
    {
      if((USBx_DEVICE->DSTS & USB_OTG_DSTS_SUSPSTS) == USB_OTG_DSTS_SUSPSTS)
      {
        
        HAL_PCD_SuspendCallback(hpcd);
      }
      __HAL_PCD_CLEAR_FLAG(hpcd, USB_OTG_GINTSTS_USBSUSP);
    }

#ifdef USB_OTG_GLPMCFG_LPMEN
    /* Handle LPM Interrupt */ 
    if(__HAL_PCD_GET_FLAG(hpcd, USB_OTG_GINTSTS_LPMINT))
    {
      __HAL_PCD_CLEAR_FLAG(hpcd, USB_OTG_GINTSTS_LPMINT);      
      if( hpcd->LPM_State == LPM_L0)
      {
        hpcd->LPM_State = LPM_L1;
        hpcd->BESL = (hpcd->Instance->GLPMCFG & USB_OTG_GLPMCFG_BESL) >>2 ;
        HAL_PCDEx_LPM_Callback(hpcd, PCD_LPM_L1_ACTIVE);
      }
      else
      {
        HAL_PCD_SuspendCallback(hpcd);
      }
    }
#endif /* USB_OTG_GLPMCFG_LPMEN */

    /* Handle Reset Interrupt */
    if(__HAL_PCD_GET_FLAG(hpcd, USB_OTG_GINTSTS_USBRST))
    {
      USBx_DEVICE->DCTL &= ~USB_OTG_DCTL_RWUSIG; 
      USB_FlushTxFifo(hpcd->Instance ,  0 );
      
      for (i = 0; i < hpcd->Init.dev_endpoints ; i++)
      {
        USBx_INEP(i)->DIEPINT = 0xFF;
        USBx_OUTEP(i)->DOEPINT = 0xFF;
      }
      USBx_DEVICE->DAINT = 0xFFFFFFFF;
      USBx_DEVICE->DAINTMSK |= 0x10001;
      
      if(hpcd->Init.use_dedicated_ep1)
      {
        USBx_DEVICE->DOUTEP1MSK |= (USB_OTG_DOEPMSK_STUPM | USB_OTG_DOEPMSK_XFRCM | USB_OTG_DOEPMSK_EPDM); 
        USBx_DEVICE->DINEP1MSK |= (USB_OTG_DIEPMSK_TOM | USB_OTG_DIEPMSK_XFRCM | USB_OTG_DIEPMSK_EPDM);  
      }
      else
      {
        USBx_DEVICE->DOEPMSK |= (USB_OTG_DOEPMSK_STUPM | USB_OTG_DOEPMSK_XFRCM | USB_OTG_DOEPMSK_EPDM);
        USBx_DEVICE->DIEPMSK |= (USB_OTG_DIEPMSK_TOM | USB_OTG_DIEPMSK_XFRCM | USB_OTG_DIEPMSK_EPDM);
      }
      
      /* Set Default Address to 0 */
      USBx_DEVICE->DCFG &= ~USB_OTG_DCFG_DAD;
      
      /* setup EP0 to receive SETUP packets */
      USB_EP0_OutStart(hpcd->Instance, hpcd->Init.dma_enable, (uint8_t *)hpcd->Setup);
        
      __HAL_PCD_CLEAR_FLAG(hpcd, USB_OTG_GINTSTS_USBRST);
    }
    
    /* Handle Enumeration done Interrupt */
    if(__HAL_PCD_GET_FLAG(hpcd, USB_OTG_GINTSTS_ENUMDNE))
    {
      USB_ActivateSetup(hpcd->Instance);
      hpcd->Instance->GUSBCFG &= ~USB_OTG_GUSBCFG_TRDT;
      
      if ( USB_GetDevSpeed(hpcd->Instance) == USB_OTG_SPEED_HIGH)
      {
        hpcd->Init.speed            = USB_OTG_SPEED_HIGH;
        hpcd->Init.ep0_mps          = USB_OTG_HS_MAX_PACKET_SIZE ;    
        hpcd->Instance->GUSBCFG |= (uint32_t)((USBD_HS_TRDT_VALUE << 10) & USB_OTG_GUSBCFG_TRDT);
      }
      else
      {
        hpcd->Init.speed            = USB_OTG_SPEED_FULL;
        hpcd->Init.ep0_mps          = USB_OTG_FS_MAX_PACKET_SIZE ;  
        hpcd->Instance->GUSBCFG |= (uint32_t)((USBD_FS_TRDT_VALUE << 10) & USB_OTG_GUSBCFG_TRDT);
      }
      
      HAL_PCD_ResetCallback(hpcd);
      
      __HAL_PCD_CLEAR_FLAG(hpcd, USB_OTG_GINTSTS_ENUMDNE);
    }

    /* Handle RxQLevel Interrupt */
    if(__HAL_PCD_GET_FLAG(hpcd, USB_OTG_GINTSTS_RXFLVL))
    {
      USB_MASK_INTERRUPT(hpcd->Instance, USB_OTG_GINTSTS_RXFLVL);
      
      temp = USBx->GRXSTSP;
      
      ep = &hpcd->OUT_ep[temp & USB_OTG_GRXSTSP_EPNUM];
      
      if(((temp & USB_OTG_GRXSTSP_PKTSTS) >> 17) ==  STS_DATA_UPDT)
      {
        if((temp & USB_OTG_GRXSTSP_BCNT) != 0)
        {
          USB_ReadPacket(USBx, ep->xfer_buff, (temp & USB_OTG_GRXSTSP_BCNT) >> 4);
          ep->xfer_buff += (temp & USB_OTG_GRXSTSP_BCNT) >> 4;
          ep->xfer_count += (temp & USB_OTG_GRXSTSP_BCNT) >> 4;
        }
      }
      else if (((temp & USB_OTG_GRXSTSP_PKTSTS) >> 17) ==  STS_SETUP_UPDT)
      {
        USB_ReadPacket(USBx, (uint8_t *)hpcd->Setup, 8);
        ep->xfer_count += (temp & USB_OTG_GRXSTSP_BCNT) >> 4;
      }
      USB_UNMASK_INTERRUPT(hpcd->Instance, USB_OTG_GINTSTS_RXFLVL);
    }
    
    /* Handle SOF Interrupt */
    if(__HAL_PCD_GET_FLAG(hpcd, USB_OTG_GINTSTS_SOF))
    {
      HAL_PCD_SOFCallback(hpcd);
      __HAL_PCD_CLEAR_FLAG(hpcd, USB_OTG_GINTSTS_SOF);
    }
    
    /* Handle Incomplete ISO IN Interrupt */
    if(__HAL_PCD_GET_FLAG(hpcd, USB_OTG_GINTSTS_IISOIXFR))
    {
      HAL_PCD_ISOINIncompleteCallback(hpcd, epnum);
      __HAL_PCD_CLEAR_FLAG(hpcd, USB_OTG_GINTSTS_IISOIXFR);
    } 
    
    /* Handle Incomplete ISO OUT Interrupt */
    if(__HAL_PCD_GET_FLAG(hpcd, USB_OTG_GINTSTS_PXFR_INCOMPISOOUT))
    {
      HAL_PCD_ISOOUTIncompleteCallback(hpcd, epnum);
      __HAL_PCD_CLEAR_FLAG(hpcd, USB_OTG_GINTSTS_PXFR_INCOMPISOOUT);
    } 
    
    /* Handle Connection event Interrupt */
    if(__HAL_PCD_GET_FLAG(hpcd, USB_OTG_GINTSTS_SRQINT))
    {
      HAL_PCD_ConnectCallback(hpcd);
      __HAL_PCD_CLEAR_FLAG(hpcd, USB_OTG_GINTSTS_SRQINT);
    } 
    
    /* Handle Disconnection event Interrupt */
    if(__HAL_PCD_GET_FLAG(hpcd, USB_OTG_GINTSTS_OTGINT))
    {
      temp = hpcd->Instance->GOTGINT;
      
      if((temp & USB_OTG_GOTGINT_SEDET) == USB_OTG_GOTGINT_SEDET)
      {
        HAL_PCD_DisconnectCallback(hpcd);
      }
      hpcd->Instance->GOTGINT |= temp;
    }
  }
}

/**
  * @brief  Data OUT stage callback.
  * @param  hpcd: PCD handle
  * @param  epnum: endpoint number  
  * @retval None
  */
 __weak void HAL_PCD_DataOutStageCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_PCD_DataOutStageCallback could be implemented in the user file
   */ 
}

/**
  * @brief  Data IN stage callback.
  * @param  hpcd: PCD handle
  * @param  epnum: endpoint number
  * @retval None
  */
 __weak void HAL_PCD_DataInStageCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_PCD_DataInStageCallback could be implemented in the user file
   */ 
}
/**
  * @brief  Setup stage callback.
  * @param  hpcd: PCD handle
  * @retval None
  */
 __weak void HAL_PCD_SetupStageCallback(PCD_HandleTypeDef *hpcd)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_PCD_SetupStageCallback could be implemented in the user file
   */ 
}

/**
  * @brief  USB Start Of Frame callback.
  * @param  hpcd: PCD handle
  * @retval None
  */
 __weak void HAL_PCD_SOFCallback(PCD_HandleTypeDef *hpcd)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_PCD_SOFCallback could be implemented in the user file
   */ 
}

/**
  * @brief  USB Reset callback.
  * @param  hpcd: PCD handle
  * @retval None
  */
 __weak void HAL_PCD_ResetCallback(PCD_HandleTypeDef *hpcd)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_PCD_ResetCallback could be implemented in the user file
   */ 
}

/**
  * @brief  Suspend event callback.
  * @param  hpcd: PCD handle
  * @retval None
  */
 __weak void HAL_PCD_SuspendCallback(PCD_HandleTypeDef *hpcd)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_PCD_SuspendCallback could be implemented in the user file
   */ 
}

/**
  * @brief  Resume event callback.
  * @param  hpcd: PCD handle
  * @retval None
  */
 __weak void HAL_PCD_ResumeCallback(PCD_HandleTypeDef *hpcd)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_PCD_ResumeCallback could be implemented in the user file
   */ 
}

/**
  * @brief  Incomplete ISO OUT callback.
  * @param  hpcd: PCD handle
  * @param  epnum: endpoint number
  * @retval None
  */
 __weak void HAL_PCD_ISOOUTIncompleteCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_PCD_ISOOUTIncompleteCallback could be implemented in the user file
   */ 
}

/**
  * @brief  Incomplete ISO IN callback.
  * @param  hpcd: PCD handle
  * @param  epnum: endpoint number  
  * @retval None
  */
 __weak void HAL_PCD_ISOINIncompleteCallback(PCD_HandleTypeDef *hpcd, uint8_t epnum)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_PCD_ISOINIncompleteCallback could be implemented in the user file
   */ 
}

/**
  * @brief  Connection event callback.
  * @param  hpcd: PCD handle
  * @retval None
  */
 __weak void HAL_PCD_ConnectCallback(PCD_HandleTypeDef *hpcd)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_PCD_ConnectCallback could be implemented in the user file
   */ 
}

/**
  * @brief  Disconnection event callback.
  * @param  hpcd: PCD handle
  * @retval None
  */
 __weak void HAL_PCD_DisconnectCallback(PCD_HandleTypeDef *hpcd)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_PCD_DisconnectCallback could be implemented in the user file
   */ 
}

/**
  * @}
  */

/** @defgroup PCD_Exported_Functions_Group3 Peripheral Control functions
 *  @brief   management functions
 *
@verbatim 
 ===============================================================================
                      ##### Peripheral Control functions #####
 ===============================================================================  
    [..]
    This subsection provides a set of functions allowing to control the PCD data 
    transfers.

@endverbatim
  * @{
  */

/**
  * @brief  Connect the USB device.
  * @param  hpcd: PCD handle
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_PCD_DevConnect(PCD_HandleTypeDef *hpcd)
{
  __HAL_LOCK(hpcd); 
  USB_DevConnect(hpcd->Instance);
  __HAL_UNLOCK(hpcd); 
  return HAL_OK;
}

/**
  * @brief  Disconnect the USB device.
  * @param  hpcd: PCD handle
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_PCD_DevDisconnect(PCD_HandleTypeDef *hpcd)
{
  __HAL_LOCK(hpcd); 
  USB_DevDisconnect(hpcd->Instance);
  __HAL_UNLOCK(hpcd); 
  return HAL_OK;
}

/**
  * @brief  Set the USB Device address. 
  * @param  hpcd: PCD handle
  * @param  address: new device address
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_PCD_SetAddress(PCD_HandleTypeDef *hpcd, uint8_t address)
{
  __HAL_LOCK(hpcd); 
  USB_SetDevAddress(hpcd->Instance, address);
  __HAL_UNLOCK(hpcd);   
  return HAL_OK;
}
/**
  * @brief  Open and configure an endpoint.
  * @param  hpcd: PCD handle
  * @param  ep_addr: endpoint address
  * @param  ep_mps: endpoint max packet size
  * @param  ep_type: endpoint type   
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_PCD_EP_Open(PCD_HandleTypeDef *hpcd, uint8_t ep_addr, uint16_t ep_mps, uint8_t ep_type)
{
  HAL_StatusTypeDef  ret = HAL_OK;
  USB_OTG_EPTypeDef *ep;
  
  if ((ep_addr & 0x80) == 0x80)
  {
    ep = &hpcd->IN_ep[ep_addr & 0x7F];
  }
  else
  {
    ep = &hpcd->OUT_ep[ep_addr & 0x7F];
  }
  ep->num   = ep_addr & 0x7F;
  
  ep->is_in = (0x80 & ep_addr) != 0;
  ep->maxpacket = ep_mps;
  ep->type = ep_type;
  if (ep->is_in)
  {
    /* Assign a Tx FIFO */
    ep->tx_fifo_num = ep->num;
  }
  /* Set initial data PID. */
  if (ep_type == EP_TYPE_BULK )
  {
    ep->data_pid_start = 0;
  }
  
  __HAL_LOCK(hpcd); 
  USB_ActivateEndpoint(hpcd->Instance , ep);
  __HAL_UNLOCK(hpcd);   
  return ret;
}


/**
  * @brief  Deactivate an endpoint.
  * @param  hpcd: PCD handle
  * @param  ep_addr: endpoint address
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_PCD_EP_Close(PCD_HandleTypeDef *hpcd, uint8_t ep_addr)
{  
  USB_OTG_EPTypeDef *ep;
  
  if ((ep_addr & 0x80) == 0x80)
  {
    ep = &hpcd->IN_ep[ep_addr & 0x7F];
  }
  else
  {
    ep = &hpcd->OUT_ep[ep_addr & 0x7F];
  }
  ep->num   = ep_addr & 0x7F;
  
  ep->is_in = (0x80 & ep_addr) != 0;
  
  __HAL_LOCK(hpcd); 
  USB_DeactivateEndpoint(hpcd->Instance , ep);
  __HAL_UNLOCK(hpcd);   
  return HAL_OK;
}


/**
  * @brief  Receive an amount of data.  
  * @param  hpcd: PCD handle
  * @param  ep_addr: endpoint address
  * @param  pBuf: pointer to the reception buffer   
  * @param  len: amount of data to be received
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_PCD_EP_Receive(PCD_HandleTypeDef *hpcd, uint8_t ep_addr, uint8_t *pBuf, uint32_t len)
{
  USB_OTG_EPTypeDef *ep;
  
  ep = &hpcd->OUT_ep[ep_addr & 0x7F];
  
  /*setup and start the Xfer */
  ep->xfer_buff = pBuf;  
  ep->xfer_len = len;
  ep->xfer_count = 0;
  ep->is_in = 0;
  ep->num = ep_addr & 0x7F;
  
  if (hpcd->Init.dma_enable == 1)
  {
    ep->dma_addr = (uint32_t)pBuf;  
  }
  
  __HAL_LOCK(hpcd); 
  
  if ((ep_addr & 0x7F) == 0 )
  {
    USB_EP0StartXfer(hpcd->Instance , ep, hpcd->Init.dma_enable);
  }
  else
  {
    USB_EPStartXfer(hpcd->Instance , ep, hpcd->Init.dma_enable);
  }
  __HAL_UNLOCK(hpcd); 
  
  return HAL_OK;
}

/**
  * @brief  Get Received Data Size.
  * @param  hpcd: PCD handle
  * @param  ep_addr: endpoint address
  * @retval Data Size
  */
uint16_t HAL_PCD_EP_GetRxCount(PCD_HandleTypeDef *hpcd, uint8_t ep_addr)
{
  return hpcd->OUT_ep[ep_addr & 0x7F].xfer_count;
}
/**
  * @brief  Send an amount of data.  
  * @param  hpcd: PCD handle
  * @param  ep_addr: endpoint address
  * @param  pBuf: pointer to the transmission buffer   
  * @param  len: amount of data to be sent
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_PCD_EP_Transmit(PCD_HandleTypeDef *hpcd, uint8_t ep_addr, uint8_t *pBuf, uint32_t len)
{
  USB_OTG_EPTypeDef *ep;
  
  ep = &hpcd->IN_ep[ep_addr & 0x7F];
  
  /*setup and start the Xfer */
  ep->xfer_buff = pBuf;  
  ep->xfer_len = len;
  ep->xfer_count = 0;
  ep->is_in = 1;
  ep->num = ep_addr & 0x7F;
  
  if (hpcd->Init.dma_enable == 1)
  {
    ep->dma_addr = (uint32_t)pBuf;  
  }
  
  __HAL_LOCK(hpcd); 
  
  if ((ep_addr & 0x7F) == 0 )
  {
    USB_EP0StartXfer(hpcd->Instance , ep, hpcd->Init.dma_enable);
  }
  else
  {
    USB_EPStartXfer(hpcd->Instance , ep, hpcd->Init.dma_enable);
  }
  
  __HAL_UNLOCK(hpcd);
     
  return HAL_OK;
}

/**
  * @brief  Set a STALL condition over an endpoint.
  * @param  hpcd: PCD handle
  * @param  ep_addr: endpoint address
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_PCD_EP_SetStall(PCD_HandleTypeDef *hpcd, uint8_t ep_addr)
{
  USB_OTG_EPTypeDef *ep;
  
  if ((0x80 & ep_addr) == 0x80)
  {
    ep = &hpcd->IN_ep[ep_addr & 0x7F];
  }
  else
  {
    ep = &hpcd->OUT_ep[ep_addr];
  }
  
  ep->is_stall = 1;
  ep->num   = ep_addr & 0x7F;
  ep->is_in = ((ep_addr & 0x80) == 0x80);
  
  
  __HAL_LOCK(hpcd); 
  USB_EPSetStall(hpcd->Instance , ep);
  if((ep_addr & 0x7F) == 0)
  {
    USB_EP0_OutStart(hpcd->Instance, hpcd->Init.dma_enable, (uint8_t *)hpcd->Setup);
  }
  __HAL_UNLOCK(hpcd); 
  
  return HAL_OK;
}

/**
  * @brief  Clear a STALL condition over in an endpoint.
  * @param  hpcd: PCD handle
  * @param  ep_addr: endpoint address
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_PCD_EP_ClrStall(PCD_HandleTypeDef *hpcd, uint8_t ep_addr)
{
  USB_OTG_EPTypeDef *ep;
  
  if ((0x80 & ep_addr) == 0x80)
  {
    ep = &hpcd->IN_ep[ep_addr & 0x7F];
  }
  else
  {
    ep = &hpcd->OUT_ep[ep_addr];
  }
  
  ep->is_stall = 0;
  ep->num   = ep_addr & 0x7F;
  ep->is_in = ((ep_addr & 0x80) == 0x80);
  
  __HAL_LOCK(hpcd); 
  USB_EPClearStall(hpcd->Instance , ep);
  __HAL_UNLOCK(hpcd); 
    
  return HAL_OK;
}

/**
  * @brief  Flush an endpoint.
  * @param  hpcd: PCD handle
  * @param  ep_addr: endpoint address
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_PCD_EP_Flush(PCD_HandleTypeDef *hpcd, uint8_t ep_addr)
{
  __HAL_LOCK(hpcd); 
  
  if ((ep_addr & 0x80) == 0x80)
  {
    USB_FlushTxFifo(hpcd->Instance, ep_addr & 0x7F);
  }
  else
  {
    USB_FlushRxFifo(hpcd->Instance);
  }
  
  __HAL_UNLOCK(hpcd); 
    
  return HAL_OK;
}

/**
  * @brief  Activate remote wakeup signalling.
  * @param  hpcd: PCD handle
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_PCD_ActivateRemoteWakeup(PCD_HandleTypeDef *hpcd)
{
  USB_OTG_GlobalTypeDef *USBx = hpcd->Instance;  
    
  if((USBx_DEVICE->DSTS & USB_OTG_DSTS_SUSPSTS) == USB_OTG_DSTS_SUSPSTS)
  {
    /* Activate Remote wakeup signaling */
    USBx_DEVICE->DCTL |= USB_OTG_DCTL_RWUSIG;
  }
  return HAL_OK;  
}

/**
  * @brief  De-activate remote wakeup signalling.
  * @param  hpcd: PCD handle
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_PCD_DeActivateRemoteWakeup(PCD_HandleTypeDef *hpcd)
{
  USB_OTG_GlobalTypeDef *USBx = hpcd->Instance;  
  
  /* De-activate Remote wakeup signaling */
  USBx_DEVICE->DCTL &= ~(USB_OTG_DCTL_RWUSIG);
  return HAL_OK;  
}
/**
  * @}
  */
  
/** @defgroup PCD_Exported_Functions_Group4 Peripheral State functions 
 *  @brief   Peripheral State functions
 *
@verbatim  
 ===============================================================================
                      ##### Peripheral State functions #####
 ===============================================================================  
    [..]
    This subsection permits to get in run-time the status of the peripheral 
    and the data flow.

@endverbatim
  * @{
  */

/**
  * @brief  Return the PCD handle state.
  * @param  hpcd: PCD handle
  * @retval HAL state
  */
PCD_StateTypeDef HAL_PCD_GetState(PCD_HandleTypeDef *hpcd)
{
  return hpcd->State;
}
/**
  * @}
  */

/**
  * @}
  */

/* Private functions ---------------------------------------------------------*/
/** @addtogroup PCD_Private_Functions
  * @{
  */

/**
  * @brief  Check FIFO for the next packet to be loaded.
  * @param  hpcd: PCD handle
  * @param  epnum : endpoint number   
  * @retval HAL status
  */
static HAL_StatusTypeDef PCD_WriteEmptyTxFifo(PCD_HandleTypeDef *hpcd, uint32_t epnum)
{
  USB_OTG_GlobalTypeDef *USBx = hpcd->Instance;  
  USB_OTG_EPTypeDef *ep;
  int32_t len = 0;
  uint32_t len32b;
  uint32_t fifoemptymsk = 0;

  ep = &hpcd->IN_ep[epnum];
  len = ep->xfer_len - ep->xfer_count;
  
  if (len > ep->maxpacket)
  {
    len = ep->maxpacket;
  }
  
  
  len32b = (len + 3) / 4;
 
  while  ( (USBx_INEP(epnum)->DTXFSTS & USB_OTG_DTXFSTS_INEPTFSAV) > len32b &&
          ep->xfer_count < ep->xfer_len &&
            ep->xfer_len != 0)
  {
    /* Write the FIFO */
    len = ep->xfer_len - ep->xfer_count;
    
    if (len > ep->maxpacket)
    {
      len = ep->maxpacket;
    }
    len32b = (len + 3) / 4;
    
    USB_WritePacket(USBx, ep->xfer_buff, epnum, len, hpcd->Init.dma_enable); 
    
    ep->xfer_buff  += len;
    ep->xfer_count += len;
  }
  
  if(len <= 0)
  {
    fifoemptymsk = 0x1 << epnum;
    USBx_DEVICE->DIEPEMPMSK &= ~fifoemptymsk;
    
  }
  
  return HAL_OK;  
}

/**
  * @}
  */
#endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx || STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx ||
          STM32F401xC || STM32F401xE || STM32F411xE || STM32F446xx || STM32F469xx || STM32F479xx  */
#endif /* HAL_PCD_MODULE_ENABLED */
/**
  * @}
  */

/**
  * @}
  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/