aboutsummaryrefslogblamecommitdiff
path: root/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_sai.c
blob: 190bb86cd40855c69b51690a174e1fd25f3a7aed (plain) (tree)
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
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908



















































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































                                                                                                                                        
/**
  ******************************************************************************
  * @file    stm32f4xx_hal_sai.c
  * @author  MCD Application Team
  * @version V1.3.2
  * @date    26-June-2015
  * @brief   SAI HAL module driver.
  *          This file provides firmware functions to manage the following 
  *          functionalities of the Serial Audio Interface (SAI) peripheral:
  *           + Initialization/de-initialization functions
  *           + I/O operation functions
  *           + Peripheral Control functions 
  *           + Peripheral State functions
  *         
  @verbatim
 ==============================================================================
                  ##### How to use this driver #####
  ==============================================================================
           
  [..]
    The SAI HAL driver can be used as follows:
    
    (#) Declare a SAI_HandleTypeDef handle structure.
    (#) Initialize the SAI low level resources by implementing the HAL_SAI_MspInit() API:
        (##) Enable the SAI interface clock.                      
        (##) SAI pins configuration:
            (+++) Enable the clock for the SAI GPIOs.
            (+++) Configure these SAI pins as alternate function pull-up.
        (##) NVIC configuration if you need to use interrupt process (HAL_SAI_Transmit_IT()
             and HAL_SAI_Receive_IT() APIs):
            (+++) Configure the SAI interrupt priority.
            (+++) Enable the NVIC SAI IRQ handle.

        (##) DMA Configuration if you need to use DMA process (HAL_SAI_Transmit_DMA()
             and HAL_SAI_Receive_DMA() APIs):
            (+++) Declare a DMA handle structure for the Tx/Rx stream.
            (+++) Enable the DMAx interface clock.
            (+++) Configure the declared DMA handle structure with the required Tx/Rx parameters.                
            (+++) Configure the DMA Tx/Rx Stream.
            (+++) Associate the initialized DMA handle to the SAI DMA Tx/Rx handle.
            (+++) Configure the priority and enable the NVIC for the transfer complete interrupt on the 
                DMA Tx/Rx Stream.
  
   (#) Program the SAI Mode, Standard, Data Format, MCLK Output, Audio frequency and Polarity
       using HAL_SAI_Init() function.
   
   -@- The specific SAI interrupts (FIFO request and Overrun underrun interrupt)
       will be managed using the macros __SAI_ENABLE_IT() and __SAI_DISABLE_IT()
       inside the transmit and receive process.   

  [..]           
   (@) SAI Clock Source configuration is managed differently depending on the selected
       STM32F4 devices :
       (+@) For STM32F446xx devices, the configuration is managed through RCCEx_PeriphCLKConfig()
            function in the HAL RCC drivers
       (+@) For STM32F439xx/STM32F437xx/STM32F429xx/STM32F427xx devices, the configuration 
            is managed within HAL SAI drivers through HAL_SAI_Init() function using
            ClockSource field of SAI_InitTypeDef structure.       
  [..]           
   (@) Make sure that either:
       (+@) I2S PLL is configured or 
       (+@) SAI PLL is configured or 
       (+@) External clock source is configured after setting correctly 
            the define constant EXTERNAL_CLOCK_VALUE in the stm32f4xx_hal_conf.h file. 
                        
  [..]           
    (@) In master Tx mode: enabling the audio block immediately generates the bit clock 
        for the external slaves even if there is no data in the FIFO, However FS signal 
        generation is conditioned by the presence of data in the FIFO.
                 
  [..]           
    (@) In master Rx mode: enabling the audio block immediately generates the bit clock 
        and FS signal for the external slaves. 
                
  [..]           
    (@) It is mandatory to respect the following conditions in order to avoid bad SAI behavior: 
        (+@)  First bit Offset <= (SLOT size - Data size)
        (+@)  Data size <= SLOT size
        (+@)  Number of SLOT x SLOT size = Frame length
        (+@)  The number of slots should be even when SAI_FS_CHANNEL_IDENTIFICATION is selected.  

  [..]         
     Three operation modes are available within this driver :     
  
   *** Polling mode IO operation ***
   =================================
   [..]    
     (+) Send an amount of data in blocking mode using HAL_SAI_Transmit() 
     (+) Receive an amount of data in blocking mode using HAL_SAI_Receive()
   
   *** Interrupt mode IO operation ***    
   ===================================
   [..]    
     (+) Send an amount of data in non blocking mode using HAL_SAI_Transmit_IT() 
     (+) At transmission end of transfer HAL_SAI_TxCpltCallback is executed and user can 
         add his own code by customization of function pointer HAL_SAI_TxCpltCallback
     (+) Receive an amount of data in non blocking mode using HAL_SAI_Receive_IT() 
     (+) At reception end of transfer HAL_SAI_RxCpltCallback is executed and user can 
         add his own code by customization of function pointer HAL_SAI_RxCpltCallback                                      
     (+) In case of transfer Error, HAL_SAI_ErrorCallback() function is executed and user can 
         add his own code by customization of function pointer HAL_SAI_ErrorCallback

   *** DMA mode IO operation ***    
   ==============================
   [..] 
     (+) Send an amount of data in non blocking mode (DMA) using HAL_SAI_Transmit_DMA() 
     (+) At transmission end of transfer HAL_SAI_TxCpltCallback is executed and user can 
         add his own code by customization of function pointer HAL_SAI_TxCpltCallback
     (+) Receive an amount of data in non blocking mode (DMA) using HAL_SAI_Receive_DMA() 
     (+) At reception end of transfer HAL_SAI_RxCpltCallback is executed and user can 
         add his own code by customization of function pointer HAL_SAI_RxCpltCallback                                  
     (+) In case of transfer Error, HAL_SAI_ErrorCallback() function is executed and user can 
         add his own code by customization of function pointer HAL_SAI_ErrorCallback
     (+) Pause the DMA Transfer using HAL_SAI_DMAPause()      
     (+) Resume the DMA Transfer using HAL_SAI_DMAResume()  
     (+) Stop the DMA Transfer using HAL_SAI_DMAStop()      
   
   *** SAI HAL driver macros list ***
   ============================================= 
   [..]
     Below the list of most used macros in USART HAL driver :
       
      (+) __HAL_SAI_ENABLE: Enable the SAI peripheral
      (+) __HAL_SAI_DISABLE: Disable the SAI peripheral
      (+) __HAL_SAI_ENABLE_IT : Enable the specified SAI interrupts
      (+) __HAL_SAI_DISABLE_IT : Disable the specified SAI interrupts
      (+) __HAL_SAI_GET_IT_SOURCE: Check if the specified SAI interrupt source is 
          enabled or disabled
      (+) __HAL_SAI_GET_FLAG: Check whether the specified SAI flag is set or not
  
  @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 SAI SAI
  * @brief SAI HAL module driver
  * @{
  */

#ifdef HAL_SAI_MODULE_ENABLED

#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) || defined(STM32F446xx)

/* Private typedef -----------------------------------------------------------*/
/** @defgroup SAI_Private_Typedefs  SAI Private Typedefs
  * @{
  */
typedef enum {
  SAI_MODE_DMA,
  SAI_MODE_IT
}SAI_ModeTypedef;
/**
  * @}
  */
/* Private define ------------------------------------------------------------*/
/** @defgroup SAI_Private_Constants  SAI Private Constants
  * @{
  */
#define SAI_FIFO_SIZE       8
#define SAI_DEFAULT_TIMEOUT 4
/**
  * @}
  */

/* SAI registers Masks */
#define CR1_CLEAR_MASK            ((uint32_t)0xFF04C010)
#define FRCR_CLEAR_MASK           ((uint32_t)0xFFF88000)
#define SLOTR_CLEAR_MASK          ((uint32_t)0x0000F020)

#define SAI_TIMEOUT_VALUE         10
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
static void SAI_FillFifo(SAI_HandleTypeDef *hsai);
static uint32_t SAI_InterruptFlag(SAI_HandleTypeDef *hsai, uint32_t mode);
static HAL_StatusTypeDef SAI_InitI2S(SAI_HandleTypeDef *hsai, uint32_t protocol, uint32_t datasize, uint32_t nbslot);
static HAL_StatusTypeDef SAI_InitPCM(SAI_HandleTypeDef *hsai, uint32_t protocol, uint32_t datasize, uint32_t nbslot);

static HAL_StatusTypeDef SAI_Disable(SAI_HandleTypeDef *hsai);
static void SAI_Transmit_IT8Bit(SAI_HandleTypeDef *hsai);
static void SAI_Transmit_IT16Bit(SAI_HandleTypeDef *hsai);
static void SAI_Transmit_IT32Bit(SAI_HandleTypeDef *hsai);
static void SAI_Receive_IT8Bit(SAI_HandleTypeDef *hsai);
static void SAI_Receive_IT16Bit(SAI_HandleTypeDef *hsai);
static void SAI_Receive_IT32Bit(SAI_HandleTypeDef *hsai);

static void SAI_DMATxCplt(DMA_HandleTypeDef *hdma);
static void SAI_DMATxHalfCplt(DMA_HandleTypeDef *hdma);
static void SAI_DMARxCplt(DMA_HandleTypeDef *hdma);
static void SAI_DMARxHalfCplt(DMA_HandleTypeDef *hdma);
static void SAI_DMAError(DMA_HandleTypeDef *hdma);

/* Exported functions ---------------------------------------------------------*/

/** @defgroup SAI_Exported_Functions  SAI Exported Functions
  * @{
  */

/** @defgroup SAI_Exported_Functions_Group1 Initialization and de-initialization functions 
 *  @brief    Initialization and Configuration functions 
 *
@verbatim    
 ===============================================================================
              ##### Initialization and de-initialization functions #####
 ===============================================================================
    [..]  This subsection provides a set of functions allowing to initialize and 
          de-initialize the SAIx peripheral:

      (+) User must implement HAL_SAI_MspInit() function in which he configures 
          all related peripherals resources (CLOCK, GPIO, DMA, IT and NVIC ).

      (+) Call the function HAL_SAI_Init() to configure the selected device with 
          the selected configuration:
        (++) Mode (Master/slave TX/RX)
        (++) Protocol 
        (++) Data Size
        (++) MCLK Output
        (++) Audio frequency
        (++) FIFO Threshold
        (++) Frame Config
        (++) Slot Config

      (+) Call the function HAL_SAI_DeInit() to restore the default configuration 
          of the selected SAI peripheral.     

@endverbatim
  * @{
  */

/**
  * @brief  Initializes the structure FrameInit, SlotInit and the low part of 
  *         Init according to the specified parameters and call the function
  *         HAL_SAI_Init to initialize the SAI block.
  * @param  hsai : pointer to a SAI_HandleTypeDef structure that contains 
  *               the configuration information for SAI module.
  * @param  protocol : one of the supported protocol @ref SAI_Protocol
  * @param  datasize : one of the supported datasize @ref SAI_Protocol_DataSize
  *                the configuration information for SAI module.
  * @param  nbslot   : Number of slot.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SAI_InitProtocol(SAI_HandleTypeDef *hsai, uint32_t protocol, uint32_t datasize, uint32_t nbslot)
{
  HAL_StatusTypeDef status = HAL_OK;
  
  /* Check the parameters */
  assert_param(IS_SAI_SUPPORTED_PROTOCOL(protocol));
  assert_param(IS_SAI_PROTOCOL_DATASIZE(datasize));
  
  switch(protocol)
  {
  case SAI_I2S_STANDARD :
  case SAI_I2S_MSBJUSTIFIED :
  case SAI_I2S_LSBJUSTIFIED :
    status = SAI_InitI2S(hsai, protocol, datasize, nbslot);
    break;  
  case SAI_PCM_LONG :
  case SAI_PCM_SHORT :
    status = SAI_InitPCM(hsai, protocol, datasize, nbslot);
    break;
  default :
    status = HAL_ERROR;
    break;
  }
  
  if(status == HAL_OK)
  {
    status = HAL_SAI_Init(hsai);
  }

  return status;
}

/**
  * @brief  Initializes the SAI according to the specified parameters 
  *         in the SAI_InitTypeDef and create the associated handle.
  * @param  hsai: pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SAI_Init(SAI_HandleTypeDef *hsai)
{ 
  uint32_t tmpclock = 0;

  /* This variable used to store the SAI_CK_x (value in Hz) */
  uint32_t freq = 0;
  
  /* Check the SAI handle allocation */
  if(hsai == NULL)
  {
    return HAL_ERROR;
  }
  
  /* Check the SAI Block parameters */
  assert_param(IS_SAI_AUDIO_FREQUENCY(hsai->Init.AudioFrequency));  
  assert_param(IS_SAI_BLOCK_PROTOCOL(hsai->Init.Protocol));
  assert_param(IS_SAI_BLOCK_MODE(hsai->Init.AudioMode));
  assert_param(IS_SAI_BLOCK_SYNCEXT(hsai->Init.SynchroExt));
  assert_param(IS_SAI_BLOCK_DATASIZE(hsai->Init.DataSize));
  assert_param(IS_SAI_BLOCK_FIRST_BIT(hsai->Init.FirstBit));
  assert_param(IS_SAI_BLOCK_CLOCK_STROBING(hsai->Init.ClockStrobing));
  assert_param(IS_SAI_BLOCK_SYNCHRO(hsai->Init.Synchro));
  assert_param(IS_SAI_BLOCK_OUTPUT_DRIVE(hsai->Init.OutputDrive));
  assert_param(IS_SAI_BLOCK_NODIVIDER(hsai->Init.NoDivider));
  assert_param(IS_SAI_BLOCK_FIFO_THRESHOLD(hsai->Init.FIFOThreshold));
  assert_param(IS_SAI_MONO_STEREO_MODE(hsai->Init.MonoStereoMode));
  assert_param(IS_SAI_BLOCK_COMPANDING_MODE(hsai->Init.CompandingMode));
  assert_param(IS_SAI_BLOCK_TRISTATE_MANAGEMENT(hsai->Init.TriState));
  
  /* Check the SAI Block Frame parameters */
  assert_param(IS_SAI_BLOCK_FRAME_LENGTH(hsai->FrameInit.FrameLength));
  assert_param(IS_SAI_BLOCK_ACTIVE_FRAME(hsai->FrameInit.ActiveFrameLength));
  assert_param(IS_SAI_BLOCK_FS_DEFINITION(hsai->FrameInit.FSDefinition));
  assert_param(IS_SAI_BLOCK_FS_POLARITY(hsai->FrameInit.FSPolarity));
  assert_param(IS_SAI_BLOCK_FS_OFFSET(hsai->FrameInit.FSOffset));
  
  /* Check the SAI Block Slot parameters */
  assert_param(IS_SAI_BLOCK_FIRSTBIT_OFFSET(hsai->SlotInit.FirstBitOffset));
  assert_param(IS_SAI_BLOCK_SLOT_SIZE(hsai->SlotInit.SlotSize));
  assert_param(IS_SAI_BLOCK_SLOT_NUMBER(hsai->SlotInit.SlotNumber));
  assert_param(IS_SAI_SLOT_ACTIVE(hsai->SlotInit.SlotActive));
  
  if(hsai->State == HAL_SAI_STATE_RESET)
  {
    /* Allocate lock resource and initialize it */
    hsai->Lock = HAL_UNLOCKED;
    
    /* Init the low level hardware : GPIO, CLOCK, NVIC and DMA */
    HAL_SAI_MspInit(hsai);
  }
  
  hsai->State = HAL_SAI_STATE_BUSY;
  
  /* Disable the selected SAI peripheral */
  SAI_Disable(hsai);
  
  /* SAI Block Synchro Configuration -----------------------------------------*/
  SAI_BlockSynchroConfig(hsai);
    
  /* Configure Master Clock using the following formula :
     MCLK_x = SAI_CK_x / (MCKDIV[3:0] * 2) with MCLK_x = 256 * FS
     FS = SAI_CK_x / (MCKDIV[3:0] * 2) * 256
     MCKDIV[3:0] = SAI_CK_x / FS * 512 */
  if(hsai->Init.AudioFrequency != SAI_AUDIO_FREQUENCY_MCKDIV)
  { 
  /* Get SAI clock source based on Source clock selection from RCC */
  freq = SAI_GetInputClock(hsai);
  
    /* (saiclocksource x 10) to keep Significant digits */
    tmpclock = (((freq * 10) / ((hsai->Init.AudioFrequency) * 512)));
    
    hsai->Init.Mckdiv = tmpclock / 10;
    
        /* Round result to the nearest integer */
    if((tmpclock % 10) > 8) 
    {
      hsai->Init.Mckdiv+= 1;
    }
  }

  /* SAI Block Configuration ------------------------------------------------------------*/
  /* SAI CR1 Configuration */
  hsai->Instance->CR1&=~(SAI_xCR1_MODE | SAI_xCR1_PRTCFG |  SAI_xCR1_DS |      \
                         SAI_xCR1_LSBFIRST | SAI_xCR1_CKSTR | SAI_xCR1_SYNCEN |\
                         SAI_xCR1_MONO | SAI_xCR1_OUTDRIV  | SAI_xCR1_DMAEN |  \
                         SAI_xCR1_NODIV | SAI_xCR1_MCKDIV);
  
  hsai->Instance->CR1|= (hsai->Init.AudioMode | hsai->Init.Protocol |           \
                        hsai->Init.DataSize | hsai->Init.FirstBit  |           \
                        hsai->Init.ClockStrobing | hsai->Init.Synchro |        \
                        hsai->Init.MonoStereoMode | hsai->Init.OutputDrive |   \
                        hsai->Init.NoDivider | (hsai->Init.Mckdiv << 20) | hsai->Init.CompandingMode);  
  
  /* SAI CR2 Configuration */
  hsai->Instance->CR2&= ~(SAI_xCR2_FTH | SAI_xCR2_FFLUSH | SAI_xCR2_COMP);
  hsai->Instance->CR2|=  (hsai->Init.FIFOThreshold | hsai->Init.CompandingMode | hsai->Init.TriState);


  /* SAI Frame Configuration -----------------------------------------*/
  hsai->Instance->FRCR&=(~(SAI_xFRCR_FRL | SAI_xFRCR_FSALL | SAI_xFRCR_FSDEF | \
                           SAI_xFRCR_FSPO | SAI_xFRCR_FSOFF));
  hsai->Instance->FRCR|=((hsai->FrameInit.FrameLength - 1)  | 
                            hsai->FrameInit.FSOffset | 
                            hsai->FrameInit.FSDefinition | 
                            hsai->FrameInit.FSPolarity   | 
                            ((hsai->FrameInit.ActiveFrameLength - 1) << 8));  
  
  /* SAI Block_x SLOT Configuration ------------------------------------------*/
  /* This register has no meaning in AC�97 and SPDIF audio protocol */
  hsai->Instance->SLOTR&= (~(SAI_xSLOTR_FBOFF | SAI_xSLOTR_SLOTSZ |            \
                             SAI_xSLOTR_NBSLOT | SAI_xSLOTR_SLOTEN ));
  
  hsai->Instance->SLOTR|=  hsai->SlotInit.FirstBitOffset |  hsai->SlotInit.SlotSize
                          | hsai->SlotInit.SlotActive | ((hsai->SlotInit.SlotNumber - 1) <<  8);           
  
  /* Initialise the error code */
  hsai->ErrorCode = HAL_SAI_ERROR_NONE;
  
  /* Initialize the SAI state */
  hsai->State= HAL_SAI_STATE_READY;
  
  /* Release Lock */
  __HAL_UNLOCK(hsai);
  
  return HAL_OK;
}

/**
  * @brief  DeInitializes the SAI peripheral. 
  * @param  hsai: pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SAI_DeInit(SAI_HandleTypeDef *hsai)
{
  /* Check the SAI handle allocation */
  if(hsai == NULL)
  {
    return HAL_ERROR;
  }

  hsai->State = HAL_SAI_STATE_BUSY;

  /* Disabled All interrupt and clear all the flag */
  hsai->Instance->IMR = 0;
  hsai->Instance->CLRFR = 0xFFFFFFFF;
  
  /* Disable the SAI */
  SAI_Disable(hsai);

  /* Flush the fifo */
  SET_BIT(hsai->Instance->CR2, SAI_xCR2_FFLUSH);
  
  /* DeInit the low level hardware: GPIO, CLOCK, NVIC and DMA */
  HAL_SAI_MspDeInit(hsai);

  /* Initialize the error code */
  hsai->ErrorCode = HAL_SAI_ERROR_NONE;
  
  /* Initialize the SAI state */
  hsai->State = HAL_SAI_STATE_RESET;

  /* Release Lock */
  __HAL_UNLOCK(hsai);

  return HAL_OK;
}

/**
  * @brief SAI MSP Init.
  * @param  hsai: pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval None
  */
__weak void HAL_SAI_MspInit(SAI_HandleTypeDef *hsai)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_SAI_MspInit could be implemented in the user file
   */ 
}

/**
  * @brief SAI MSP DeInit.
  * @param  hsai: pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval None
  */
__weak void HAL_SAI_MspDeInit(SAI_HandleTypeDef *hsai)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_SAI_MspDeInit could be implemented in the user file
   */ 
}

/**
  * @}
  */

/** @defgroup SAI_Exported_Functions_Group2 IO operation functions 
 *  @brief   Data transfers functions 
 *
@verbatim   
  ===============================================================================
                      ##### IO operation functions #####
 ===============================================================================  
    [..]
    This subsection provides a set of functions allowing to manage the SAI data 
    transfers.

    (+) There are two modes of transfer:
       (++) Blocking mode : The communication is performed in the polling mode. 
            The status of all data processing is returned by the same function 
            after finishing transfer.  
       (++) No-Blocking mode : The communication is performed using Interrupts 
            or DMA. These functions return the status of the transfer startup.
            The end of the data processing will be indicated through the 
            dedicated SAI IRQ when using Interrupt mode or the DMA IRQ when 
            using DMA mode.

    (+) Blocking mode functions are :
        (++) HAL_SAI_Transmit()
        (++) HAL_SAI_Receive()
        (++) HAL_SAI_TransmitReceive()
        
    (+) Non Blocking mode functions with Interrupt are :
        (++) HAL_SAI_Transmit_IT()
        (++) HAL_SAI_Receive_IT()
        (++) HAL_SAI_TransmitReceive_IT()

    (+) Non Blocking mode functions with DMA are :
        (++) HAL_SAI_Transmit_DMA()
        (++) HAL_SAI_Receive_DMA()
        (++) HAL_SAI_TransmitReceive_DMA()

    (+) A set of Transfer Complete Callbacks are provided in non Blocking mode:
        (++) HAL_SAI_TxCpltCallback()
        (++) HAL_SAI_RxCpltCallback()
        (++) HAL_SAI_ErrorCallback()

@endverbatim
  * @{
  */

/**
  * @brief  Transmits an amount of data in blocking mode.
  * @param  hsai: pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @param  pData: Pointer to data buffer
  * @param  Size: Amount of data to be sent
  * @param  Timeout: Timeout duration
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SAI_Transmit(SAI_HandleTypeDef *hsai, uint8_t* pData, uint16_t Size, uint32_t Timeout)
{
  uint32_t tickstart = 0;
  
  if((pData == NULL ) || (Size == 0)) 
  {
    return  HAL_ERROR;
  }
  
  if(hsai->State == HAL_SAI_STATE_READY)
  {  
    /* Process Locked */
    __HAL_LOCK(hsai);
    
    hsai->State = HAL_SAI_STATE_BUSY_TX;
    hsai->ErrorCode = HAL_SAI_ERROR_NONE;
    hsai->XferSize = Size;
    hsai->XferCount = Size;
    hsai->pBuffPtr = pData;
    
    /* Check if the SAI is already enabled */ 
    if((hsai->Instance->CR1 & SAI_xCR1_SAIEN) != SAI_xCR1_SAIEN)
    {
      /* fill the fifo with data before to enabled the SAI */
      SAI_FillFifo(hsai);      
      /* Enable SAI peripheral */    
      __HAL_SAI_ENABLE(hsai);
    }
    
    while(hsai->XferCount > 0)
    { 
      /* Write data if the FIFO is not full */
      if((hsai->Instance->SR & SAI_xSR_FLVL) != SAI_FIFOSTATUS_FULL)
      {
        if((hsai->Init.DataSize == SAI_DATASIZE_8) && (hsai->Init.CompandingMode == SAI_NOCOMPANDING))
        {      
          hsai->Instance->DR = (*hsai->pBuffPtr++);
        }
        else if(hsai->Init.DataSize <= SAI_DATASIZE_16)
        {
          hsai->Instance->DR = *((uint16_t *)hsai->pBuffPtr);
          hsai->pBuffPtr+= 2;        
        }
        else
        {
          hsai->Instance->DR = *((uint32_t *)hsai->pBuffPtr);
          hsai->pBuffPtr+= 4;
        }       
        hsai->XferCount--; 
      }
      else
      {
        /* Get tick */
        tickstart = HAL_GetTick();      
        /* Check for the Timeout */
        if(Timeout != HAL_MAX_DELAY)
        {
          if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
          {
            /* Update error code */
            hsai->ErrorCode |= HAL_SAI_ERROR_TIMEOUT;
            
            /* Process Unlocked */
            __HAL_UNLOCK(hsai);
            
            /* Change the SAI state */
            hsai->State = HAL_SAI_STATE_TIMEOUT;
            
            return HAL_TIMEOUT;
          }
        } 
      }
    }      
    
    hsai->State = HAL_SAI_STATE_READY; 
    
    /* Process Unlocked */
    __HAL_UNLOCK(hsai);
    
    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Receives an amount of data in blocking mode. 
  * @param  hsai: pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @param  pData: Pointer to data buffer
  * @param  Size: Amount of data to be received
  * @param  Timeout: Timeout duration
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SAI_Receive(SAI_HandleTypeDef *hsai, uint8_t *pData, uint16_t Size, uint32_t Timeout)
{
  uint32_t tickstart = 0;
  
  if((pData == NULL ) || (Size == 0)) 
  {
    return  HAL_ERROR;
  }
  
  if(hsai->State == HAL_SAI_STATE_READY)
  { 
    /* Process Locked */
    __HAL_LOCK(hsai);
    
    hsai->State = HAL_SAI_STATE_BUSY_RX;
    hsai->ErrorCode = HAL_SAI_ERROR_NONE;
    hsai->pBuffPtr = pData;
    hsai->XferSize = Size;
    hsai->XferCount = Size;
    
    /* Check if the SAI is already enabled */ 
    if((hsai->Instance->CR1 & SAI_xCR1_SAIEN) != SAI_xCR1_SAIEN)
    {
      /* Enable SAI peripheral */    
      __HAL_SAI_ENABLE(hsai);
    }
    
    /* Receive data */
    while(hsai->XferCount > 0)
    {
      
      if((hsai->Instance->SR & SAI_xSR_FLVL) != SAI_FIFOSTATUS_EMPTY)
      {
        if((hsai->Init.DataSize == SAI_DATASIZE_8) && (hsai->Init.CompandingMode == SAI_NOCOMPANDING))
        {
          (*hsai->pBuffPtr++) = hsai->Instance->DR;
        }
        else if(hsai->Init.DataSize <= SAI_DATASIZE_16)
        {
          *((uint16_t*)hsai->pBuffPtr) = hsai->Instance->DR;
          hsai->pBuffPtr+= 2;
        }
        else
        {
          *((uint32_t*)hsai->pBuffPtr) = hsai->Instance->DR;
          hsai->pBuffPtr+= 4;
        }  
        hsai->XferCount--; 
      }
      else
      {
        /* Get tick */
        tickstart = HAL_GetTick();
        /* Check for the Timeout */
        if(Timeout != HAL_MAX_DELAY)
        {
          if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
          {
            /* Update error code */
            hsai->ErrorCode |= HAL_SAI_ERROR_TIMEOUT;
            
            /* Process Unlocked */
            __HAL_UNLOCK(hsai);
            
            /* Change the SAI state */
            hsai->State = HAL_SAI_STATE_TIMEOUT;
            
            return HAL_TIMEOUT;
          }
        }
      }
    }      
    
    hsai->State = HAL_SAI_STATE_READY; 
    
    /* Process Unlocked */
    __HAL_UNLOCK(hsai);
    
    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Transmits an amount of data in no-blocking mode with Interrupt.
  * @param  hsai: pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @param  pData: Pointer to data buffer
  * @param  Size: Amount of data to be sent
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SAI_Transmit_IT(SAI_HandleTypeDef *hsai, uint8_t *pData, uint16_t Size)
{  
  if(hsai->State == HAL_SAI_STATE_READY)
  {
    if((pData == NULL) || (Size == 0)) 
    {
      return  HAL_ERROR;
    }
    
    hsai->pBuffPtr = pData;
    hsai->XferSize = Size;
    hsai->XferCount = Size;
    
    /* Process Locked */
    __HAL_LOCK(hsai);
    
    hsai->State = HAL_SAI_STATE_BUSY_TX;
    
    if((hsai->Init.DataSize == SAI_DATASIZE_8) && (hsai->Init.CompandingMode == SAI_NOCOMPANDING))
    {
      hsai->InterruptServiceRoutine = SAI_Transmit_IT8Bit;
    }
    else if(hsai->Init.DataSize <= SAI_DATASIZE_16)
    {
      hsai->InterruptServiceRoutine = SAI_Transmit_IT16Bit;
    }
    else
    {
      hsai->InterruptServiceRoutine = SAI_Transmit_IT32Bit;
    }
    
    /* Enable FRQ and OVRUDR interrupts */
    __HAL_SAI_ENABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_IT));
    
    /* Check if the SAI is already enabled */ 
    if((hsai->Instance->CR1 & SAI_xCR1_SAIEN) != SAI_xCR1_SAIEN)
    {
      /* Fill the fifo before starting the communication */
      SAI_FillFifo(hsai);
      
      /* Enable SAI peripheral */    
      __HAL_SAI_ENABLE(hsai);
    }
    /* Process Unlocked */
    __HAL_UNLOCK(hsai);
    
    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Receives an amount of data in no-blocking mode with Interrupt.
  * @param  hsai: pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @param  pData: Pointer to data buffer
  * @param  Size: Amount of data to be received
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SAI_Receive_IT(SAI_HandleTypeDef *hsai, uint8_t *pData, uint16_t Size)
{
  
  if(hsai->State == HAL_SAI_STATE_READY)
  {
    if((pData == NULL) || (Size == 0)) 
    {
      return  HAL_ERROR;
    }
    
    hsai->pBuffPtr = pData;
    hsai->XferSize = Size;
    hsai->XferCount = Size;
    
    /* Process Locked */
    __HAL_LOCK(hsai);
    
    hsai->State = HAL_SAI_STATE_BUSY_RX;
    
    if((hsai->Init.DataSize == SAI_DATASIZE_8) && (hsai->Init.CompandingMode == SAI_NOCOMPANDING))
    {
      hsai->InterruptServiceRoutine = SAI_Receive_IT8Bit;
    }
    else if(hsai->Init.DataSize <= SAI_DATASIZE_16)
    {
      hsai->InterruptServiceRoutine = SAI_Receive_IT16Bit;
    }
    else
    {
      hsai->InterruptServiceRoutine = SAI_Receive_IT32Bit;
    }    
    /* Enable TXE and OVRUDR interrupts */
    __HAL_SAI_ENABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_IT));
    
    /* Check if the SAI is already enabled */ 
    if((hsai->Instance->CR1 & SAI_xCR1_SAIEN) != SAI_xCR1_SAIEN)
    {
      /* Enable SAI peripheral */    
      __HAL_SAI_ENABLE(hsai);
    }
    
    /* Process Unlocked */
    __HAL_UNLOCK(hsai);
    
    return HAL_OK;
  }
  else
  {
    return HAL_BUSY; 
  } 
}

/**
  * @brief Pauses the audio stream playing from the Media.
  * @param  hsai: pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SAI_DMAPause(SAI_HandleTypeDef *hsai)
{
  /* Process Locked */
  __HAL_LOCK(hsai);
  
  /* Pause the audio file playing by disabling the SAI DMA requests */
  hsai->Instance->CR1 &= ~SAI_xCR1_DMAEN;
  
  /* Process Unlocked */
  __HAL_UNLOCK(hsai);
  
  return HAL_OK; 
}

/**
  * @brief Resumes the audio stream playing from the Media.
  * @param  hsai: pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SAI_DMAResume(SAI_HandleTypeDef *hsai)
{
  /* Process Locked */
  __HAL_LOCK(hsai);
  
  /* Enable the SAI DMA requests */
  hsai->Instance->CR1 |= SAI_xCR1_DMAEN;
  
  /* If the SAI peripheral is still not enabled, enable it */
  if ((hsai->Instance->CR1 & SAI_xCR1_SAIEN) == RESET)
  {
    /* Enable SAI peripheral */    
    __HAL_SAI_ENABLE(hsai);
  }
  
  /* Process Unlocked */
  __HAL_UNLOCK(hsai);
  
  return HAL_OK;
}

/**
  * @brief Stops the audio stream playing from the Media.
  * @param  hsai : pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SAI_DMAStop(SAI_HandleTypeDef *hsai)
{
  /* Process Locked */
  __HAL_LOCK(hsai);
  
  /* Disable the SAI DMA request */
  hsai->Instance->CR1 &= ~SAI_xCR1_DMAEN;
  
  /* Abort the SAI DMA Tx Stream */
  if(hsai->hdmatx != NULL)
  {
    HAL_DMA_Abort(hsai->hdmatx);
  }
  /* Abort the SAI DMA Rx Stream */
  if(hsai->hdmarx != NULL)
  {  
    HAL_DMA_Abort(hsai->hdmarx);
  }

  /* Disable SAI peripheral */
  SAI_Disable(hsai);
  
  hsai->State = HAL_SAI_STATE_READY;
  
  /* Process Unlocked */
  __HAL_UNLOCK(hsai);
  
  return HAL_OK;
}

/**
  * @brief Abort the current transfer and disbaled the SAI.
  * @param  hsai : pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SAI_Abort(SAI_HandleTypeDef *hsai)
{
  /* Disable the SAI DMA request */
  hsai->Instance->CR1 &= ~SAI_xCR1_DMAEN;
  
  /* Abort the SAI DMA Tx Stream */
  if(hsai->hdmatx != NULL)
  {
    HAL_DMA_Abort(hsai->hdmatx);
  }
  /* Abort the SAI DMA Rx Stream */
  if(hsai->hdmarx != NULL)
  {  
    HAL_DMA_Abort(hsai->hdmarx);
  }

  /* Disabled All interrupt and clear all the flag */
  hsai->Instance->IMR = 0;
  hsai->Instance->CLRFR = 0xFFFFFFFF;
  
  /* Disable SAI peripheral */
  SAI_Disable(hsai);
  
  /* Flush the fifo */
  SET_BIT(hsai->Instance->CR2, SAI_xCR2_FFLUSH);
  
  hsai->State = HAL_SAI_STATE_READY;
  
  /* Process Unlocked */
  __HAL_UNLOCK(hsai);
  
  return HAL_OK;
}

/**
  * @brief  Transmits an amount of data in no-blocking mode with DMA.
  * @param  hsai: pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @param  pData: Pointer to data buffer
  * @param  Size: Amount of data to be sent
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SAI_Transmit_DMA(SAI_HandleTypeDef *hsai, uint8_t *pData, uint16_t Size)
{
  uint32_t *tmp;
  
  if((pData == NULL) || (Size == 0)) 
  {
    return  HAL_ERROR;
  }
  
  if(hsai->State == HAL_SAI_STATE_READY)
  {  
    hsai->pBuffPtr = pData;
    hsai->XferSize = Size;
    hsai->XferCount = Size;
    
    /* Process Locked */
    __HAL_LOCK(hsai);
    
    hsai->State = HAL_SAI_STATE_BUSY_TX;
    
    /* Set the SAI Tx DMA Half transfer complete callback */
    hsai->hdmatx->XferHalfCpltCallback = SAI_DMATxHalfCplt;
    
    /* Set the SAI TxDMA transfer complete callback */
    hsai->hdmatx->XferCpltCallback = SAI_DMATxCplt;
    
    /* Set the DMA error callback */
    hsai->hdmatx->XferErrorCallback = SAI_DMAError;
    
    /* Enable the Tx DMA Stream */
    tmp = (uint32_t*)&pData;
    HAL_DMA_Start_IT(hsai->hdmatx, *(uint32_t*)tmp, (uint32_t)&hsai->Instance->DR, hsai->XferSize);
    
    /* Check if the SAI is already enabled */ 
    if((hsai->Instance->CR1 & SAI_xCR1_SAIEN) != SAI_xCR1_SAIEN)
    {
      /* Enable SAI peripheral */
      __HAL_SAI_ENABLE(hsai);
    }
    
    /* Enable the interrupts for error handling */
    __HAL_SAI_ENABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_DMA));
    
    /* Enable SAI Tx DMA Request */  
    hsai->Instance->CR1 |= SAI_xCR1_DMAEN;
    
    /* Process Unlocked */
    __HAL_UNLOCK(hsai);
    
    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Receives an amount of data in no-blocking mode with DMA. 
  * @param  hsai: pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @param  pData: Pointer to data buffer
  * @param  Size: Amount of data to be received
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SAI_Receive_DMA(SAI_HandleTypeDef *hsai, uint8_t *pData, uint16_t Size)
{
  uint32_t *tmp;
  
  if((pData == NULL) || (Size == 0))
  {
    return  HAL_ERROR;
  } 
  
  if(hsai->State == HAL_SAI_STATE_READY)
  {    
    hsai->pBuffPtr = pData;
    hsai->XferSize = Size;
    hsai->XferCount = Size;
    
    /* Process Locked */
    __HAL_LOCK(hsai);
    
    hsai->State = HAL_SAI_STATE_BUSY_RX;
    
    /* Set the SAI Rx DMA Half transfer complete callback */
    hsai->hdmarx->XferHalfCpltCallback = SAI_DMARxHalfCplt;
    
    /* Set the SAI Rx DMA transfer complete callback */
    hsai->hdmarx->XferCpltCallback = SAI_DMARxCplt;
    
    /* Set the DMA error callback */
    hsai->hdmarx->XferErrorCallback = SAI_DMAError;
    
    /* Enable the Rx DMA Stream */
    tmp = (uint32_t*)&pData;
    HAL_DMA_Start_IT(hsai->hdmarx, (uint32_t)&hsai->Instance->DR, *(uint32_t*)tmp, hsai->XferSize);
    
    /* Check if the SAI is already enabled */
    if((hsai->Instance->CR1 & SAI_xCR1_SAIEN) != SAI_xCR1_SAIEN)
    {
      /* Enable SAI peripheral */
      __HAL_SAI_ENABLE(hsai);
    }
    
    /* Enable the interrupts for error handling */
    __HAL_SAI_ENABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_DMA));
    
    /* Enable SAI Rx DMA Request */
    hsai->Instance->CR1 |= SAI_xCR1_DMAEN;
    
    /* Process Unlocked */
    __HAL_UNLOCK(hsai);
    
    return HAL_OK;
  }
  else
  {
    return HAL_BUSY;
  }
}

/**
  * @brief  Enable the tx mute mode.
  * @param  hsai : pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @param  val :  value sent during the mute @ref SAI_Block_Mute_Value
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SAI_EnableTxMuteMode(SAI_HandleTypeDef *hsai, uint16_t val)
{
  assert_param(IS_SAI_BLOCK_MUTE_VALUE(val));
  
  if(hsai->State != HAL_SAI_STATE_RESET)
  {
    CLEAR_BIT(hsai->Instance->CR2, SAI_xCR2_MUTEVAL | SAI_xCR2_MUTE);
    SET_BIT(hsai->Instance->CR2, SAI_xCR2_MUTE | val);
    return HAL_OK;
  }
  return HAL_ERROR;
}

/**
  * @brief  Disable the tx mute mode.
  * @param  hsai : pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SAI_DisableTxMuteMode(SAI_HandleTypeDef *hsai)
{
  if(hsai->State != HAL_SAI_STATE_RESET)
  {
    CLEAR_BIT(hsai->Instance->CR2, SAI_xCR2_MUTEVAL | SAI_xCR2_MUTE);
    return HAL_OK;
  }
  return HAL_ERROR;
}

/**
  * @brief  Enable the rx mute detection.
  * @param  hsai : pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @param  callback : function called when the mute is detected
  * @param  counter : number a data before mute detection max 63.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SAI_EnableRxMuteMode(SAI_HandleTypeDef *hsai, SAIcallback callback, uint16_t counter)
{
  assert_param(IS_SAI_BLOCK_MUTE_COUNTER(counter));
  
  if(hsai->State != HAL_SAI_STATE_RESET)
  {
    /* set the mute counter */
    CLEAR_BIT(hsai->Instance->CR2, SAI_xCR2_MUTECNT);
    SET_BIT(hsai->Instance->CR2, (uint32_t)((uint32_t)counter << 6));
    hsai->mutecallback = callback;
    /* enable the IT interrupt */
    __HAL_SAI_ENABLE_IT(hsai, SAI_IT_MUTEDET);
    return HAL_OK;
  }
  return HAL_ERROR;
}

/**
  * @brief  Disable the rx mute detection.
  * @param  hsai : pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SAI_DisableRxMuteMode(SAI_HandleTypeDef *hsai)
{
  if(hsai->State != HAL_SAI_STATE_RESET)
  {
    /* set the mutecallback to NULL */
    hsai->mutecallback = (SAIcallback)NULL;
    /* enable the IT interrupt */
    __HAL_SAI_DISABLE_IT(hsai, SAI_IT_MUTEDET);
    return HAL_OK;
  }
  return HAL_ERROR;
}

/**
  * @brief  This function handles SAI interrupt request.
  * @param  hsai: pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval HAL status
  */
void HAL_SAI_IRQHandler(SAI_HandleTypeDef *hsai)
{ 
  if(hsai->State != HAL_SAI_STATE_RESET)
  {
    uint32_t tmpFlag = hsai->Instance->SR;
    uint32_t tmpItSource = hsai->Instance->IMR; 
    
    if(((tmpFlag & SAI_xSR_FREQ) == SAI_xSR_FREQ) && ((tmpItSource & SAI_IT_FREQ) == SAI_IT_FREQ))
    {
      hsai->InterruptServiceRoutine(hsai);
    }
    
    /* check the flag only if one of them is set */
    if(tmpFlag != 0x00000000)
    {
      /* SAI Overrun error interrupt occurred ----------------------------------*/
      if(((tmpFlag & SAI_FLAG_OVRUDR) == SAI_FLAG_OVRUDR) && ((tmpItSource & SAI_IT_OVRUDR) == SAI_IT_OVRUDR))
      {
        /* Clear the SAI Overrun flag */
        __HAL_SAI_CLEAR_FLAG(hsai, SAI_FLAG_OVRUDR);
        /* Change the SAI error code */
        hsai->ErrorCode = ((hsai->State == HAL_SAI_STATE_BUSY_RX) ? HAL_SAI_ERROR_OVR : HAL_SAI_ERROR_UDR);
        /* the transfer is not stopped, we will forward the information to the user and we let the user decide what needs to be done */
        HAL_SAI_ErrorCallback(hsai);
      }
      
      /* SAI mutedet interrupt occurred ----------------------------------*/
      if(((tmpFlag & SAI_FLAG_MUTEDET) == SAI_FLAG_MUTEDET) && ((tmpItSource & SAI_IT_MUTEDET) == SAI_IT_MUTEDET))
      {
        /* Clear the SAI mutedet flag */
        __HAL_SAI_CLEAR_FLAG(hsai, SAI_FLAG_MUTEDET);
        /* call the call back function */
        if(hsai->mutecallback != (SAIcallback)NULL)
        {
          /* inform the user that an RX mute event has been detected */
          hsai->mutecallback();
        }
      }
      
      /* SAI AFSDET interrupt occurred ----------------------------------*/
      if(((tmpFlag & SAI_FLAG_AFSDET) == SAI_FLAG_AFSDET) && ((tmpItSource & SAI_IT_AFSDET) == SAI_IT_AFSDET))
      {
        /* Change the SAI error code */
        hsai->ErrorCode = HAL_SAI_ERROR_AFSDET;
        HAL_SAI_Abort(hsai);
        HAL_SAI_ErrorCallback(hsai);
      }
      
      /* SAI LFSDET interrupt occurred ----------------------------------*/
      if(((tmpFlag & SAI_FLAG_LFSDET) == SAI_FLAG_LFSDET) && ((tmpItSource & SAI_IT_LFSDET) == SAI_IT_LFSDET))
      {
        /* Change the SAI error code */
        hsai->ErrorCode = HAL_SAI_ERROR_LFSDET;
        HAL_SAI_Abort(hsai);
        HAL_SAI_ErrorCallback(hsai);
      }

      /* SAI WCKCFG interrupt occurred ----------------------------------*/
      if(((tmpFlag & SAI_FLAG_WCKCFG) == SAI_FLAG_WCKCFG) && ((tmpItSource & SAI_IT_WCKCFG) == SAI_IT_WCKCFG))
      {
        /* Change the SAI error code */
        hsai->ErrorCode = HAL_SAI_ERROR_WCKCFG;
        HAL_SAI_Abort(hsai);
        HAL_SAI_ErrorCallback(hsai);
      }
    }
  }
}

/**
  * @brief Tx Transfer completed callbacks.
  * @param  hsai: pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval None
  */
 __weak void HAL_SAI_TxCpltCallback(SAI_HandleTypeDef *hsai)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_SAI_TxCpltCallback could be implemented in the user file
   */ 
}

/**
  * @brief Tx Transfer Half completed callbacks
  * @param  hsai: pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval None
  */
 __weak void HAL_SAI_TxHalfCpltCallback(SAI_HandleTypeDef *hsai)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_SAI_TxHalfCpltCallback could be implemented in the user file
   */ 
}

/**
  * @brief Rx Transfer completed callbacks.
  * @param  hsai: pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval None
  */
__weak void HAL_SAI_RxCpltCallback(SAI_HandleTypeDef *hsai)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_SAI_RxCpltCallback could be implemented in the user file
   */
}

/**
  * @brief Rx Transfer half completed callbacks
  * @param  hsai: pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval None
  */
__weak void HAL_SAI_RxHalfCpltCallback(SAI_HandleTypeDef *hsai)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_SAI_RxCpltCallback could be implemented in the user file
   */
}

/**
  * @brief SAI error callbacks.
  * @param  hsai: pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval None
  */
__weak void HAL_SAI_ErrorCallback(SAI_HandleTypeDef *hsai)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_SAI_ErrorCallback could be implemented in the user file
   */ 
}

/**
  * @}
  */


/** @defgroup SAI_Exported_Functions_Group3 Peripheral State functions 
 *  @brief   Peripheral State functions 
 *
@verbatim   
 ===============================================================================
                ##### Peripheral State and Errors functions #####
 ===============================================================================  
    [..]
    This subsection permits to get in run-time the status of the peripheral 
    and the data flow.

@endverbatim
  * @{
  */

/**
  * @brief  Returns the SAI state.
  * @param  hsai: pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval HAL state
  */
HAL_SAI_StateTypeDef HAL_SAI_GetState(SAI_HandleTypeDef *hsai)
{
  return hsai->State;
}

/**
* @brief  Return the SAI error code
* @param  hsai : pointer to a SAI_HandleTypeDef structure that contains
  *              the configuration information for the specified SAI Block.
* @retval SAI Error Code
*/
uint32_t HAL_SAI_GetError(SAI_HandleTypeDef *hsai)
{
  return hsai->ErrorCode;
}
/**
  * @}
  */

/**
  * @brief  Initializes the SAI I2S protocol according to the specified parameters 
  *         in the SAI_InitTypeDef and create the associated handle.
  * @param  hsai : pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @param  protocol : one of the supported protocol
  * @param  datasize : one of the supported datasize @ref SAI_Protocol_DataSize
  *                the configuration information for SAI module.
  * @param  nbslot : number of slot minimum value is 2 and max is 16. 
  *                    the value must be a multiple of 2.
  * @retval HAL status
  */
static HAL_StatusTypeDef SAI_InitI2S(SAI_HandleTypeDef *hsai, uint32_t protocol, uint32_t datasize, uint32_t nbslot)
{
  /* Check the parameters */
  assert_param(IS_SAI_SUPPORTED_PROTOCOL(protocol));
  assert_param(IS_SAI_PROTOCOL_DATASIZE(datasize));
  
  hsai->Init.Protocol            = SAI_FREE_PROTOCOL;
  hsai->Init.FirstBit            = SAI_FIRSTBIT_MSB;
  hsai->Init.ClockStrobing       = SAI_CLOCKSTROBING_FALLINGEDGE;
  hsai->FrameInit.FSDefinition   = SAI_FS_CHANNEL_IDENTIFICATION;
  hsai->SlotInit.SlotActive      = SAI_SLOTACTIVE_ALL;
  hsai->SlotInit.FirstBitOffset  = 0;
  hsai->SlotInit.SlotNumber      = nbslot;
  
  /* in IS2 the number of slot must be even */
  if((nbslot & 0x1) != 0 )
  {
    return HAL_ERROR;
  }
    
  switch(protocol)
  {
  case SAI_I2S_STANDARD :
    hsai->FrameInit.FSPolarity = SAI_FS_ACTIVE_LOW;
    hsai->FrameInit.FSOffset   = SAI_FS_BEFOREFIRSTBIT;
    break;
  case SAI_I2S_MSBJUSTIFIED :
  case SAI_I2S_LSBJUSTIFIED :
    hsai->FrameInit.FSPolarity = SAI_FS_ACTIVE_HIGH;
    hsai->FrameInit.FSOffset   = SAI_FS_FIRSTBIT;
    break;
  default :
    return HAL_ERROR;
  }
   
  /* Frame definition */
  hsai->Init.DataSize = 0xFFFFFFFF;
  switch(datasize)
  {
  case SAI_PROTOCOL_DATASIZE_16BIT:
    hsai->Init.DataSize = SAI_DATASIZE_16;
    hsai->FrameInit.FrameLength = 32*(nbslot/2);
    hsai->FrameInit.ActiveFrameLength = 16*(nbslot/2);
    hsai->SlotInit.SlotSize = SAI_SLOTSIZE_16B;
    break; 
  case SAI_PROTOCOL_DATASIZE_16BITEXTENDED :
    if(hsai->Init.DataSize == 0xFFFFFFFF)
    {
      hsai->Init.DataSize = SAI_DATASIZE_16;
    }
    break; 
  case SAI_PROTOCOL_DATASIZE_24BIT:
    if(hsai->Init.DataSize == 0xFFFFFFFF)
    {
      hsai->Init.DataSize = SAI_DATASIZE_24;
    }
    break;
  case SAI_PROTOCOL_DATASIZE_32BIT: 
    if(hsai->Init.DataSize == 0xFFFFFFFF)
    {
      hsai->Init.DataSize = SAI_DATASIZE_32;
    }
    hsai->FrameInit.FrameLength = 64*(nbslot/2);
    hsai->FrameInit.ActiveFrameLength = 32*(nbslot/2);
    hsai->SlotInit.SlotSize = SAI_SLOTSIZE_32B;
    if(protocol == SAI_I2S_LSBJUSTIFIED)
    {
      if (datasize == SAI_PROTOCOL_DATASIZE_16BITEXTENDED)
      {
        hsai->SlotInit.FirstBitOffset = 16;
      }
      if (datasize == SAI_PROTOCOL_DATASIZE_24BIT)
      {
        hsai->SlotInit.FirstBitOffset = 8;
      }
    }
    break;
  default :
    return HAL_ERROR;
  }
 
  return HAL_OK;
}

/**
  * @brief  Initializes the SAI PCM protocol according to the specified parameters 
  *         in the SAI_InitTypeDef and create the associated handle.
  * @param  hsai : pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @param  protocol : one of the supported protocol
  * @param  datasize : one of the supported datasize @ref SAI_Protocol_DataSize
  * @param  nbslot : number of slot minimum value is 1 and the max is 16.
  * @retval HAL status
  */
static HAL_StatusTypeDef SAI_InitPCM(SAI_HandleTypeDef *hsai, uint32_t protocol, uint32_t datasize, uint32_t nbslot)
{
  /* Check the parameters */
  assert_param(IS_SAI_SUPPORTED_PROTOCOL(protocol));
  assert_param(IS_SAI_PROTOCOL_DATASIZE(datasize));

  hsai->Init.Protocol            = SAI_FREE_PROTOCOL;
  hsai->Init.FirstBit            = SAI_FIRSTBIT_MSB;
  hsai->Init.ClockStrobing       = SAI_CLOCKSTROBING_FALLINGEDGE;
  hsai->FrameInit.FSDefinition   = SAI_FS_STARTFRAME;
  hsai->FrameInit.FSPolarity     = SAI_FS_ACTIVE_HIGH;
  hsai->FrameInit.FSOffset       = SAI_FS_BEFOREFIRSTBIT;
  hsai->SlotInit.FirstBitOffset  = 0;
  hsai->SlotInit.SlotNumber      = nbslot;
  hsai->SlotInit.SlotActive      = SAI_SLOTACTIVE_ALL;
  
  switch(protocol)
  {
  case SAI_PCM_SHORT :
    hsai->FrameInit.ActiveFrameLength = 1;
    break;
  case SAI_PCM_LONG :
    hsai->FrameInit.ActiveFrameLength = 13;
    break;
  default :
    return HAL_ERROR;
  }
 
  switch(datasize)
  {
  case SAI_PROTOCOL_DATASIZE_16BIT:
    hsai->Init.DataSize = SAI_DATASIZE_16;
    hsai->FrameInit.FrameLength = 16 * nbslot;
    hsai->SlotInit.SlotSize = SAI_SLOTSIZE_16B;
    break; 
  case SAI_PROTOCOL_DATASIZE_16BITEXTENDED :
    hsai->Init.DataSize = SAI_DATASIZE_16;
    hsai->FrameInit.FrameLength = 32 * nbslot;
    hsai->SlotInit.SlotSize = SAI_SLOTSIZE_32B;
    break;
    
  case SAI_PROTOCOL_DATASIZE_32BIT: 
    hsai->Init.DataSize = SAI_DATASIZE_32;
    hsai->FrameInit.FrameLength = 32 * nbslot;
    hsai->SlotInit.SlotSize = SAI_SLOTSIZE_32B;
    break;
  default :
    return HAL_ERROR;
  }
 
  return HAL_OK;
}

/**
  * @brief  Fill the fifo 
  * @param  hsai : pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval None.
  */
static void SAI_FillFifo(SAI_HandleTypeDef *hsai)
{
  /* fill the fifo with data before to enabled the SAI */
  while((hsai->Instance->SR & SAI_xSR_FLVL) != SAI_FIFOSTATUS_FULL)
  {
    if((hsai->Init.DataSize == SAI_DATASIZE_8) && (hsai->Init.CompandingMode == SAI_NOCOMPANDING))
    {
      hsai->Instance->DR = (*hsai->pBuffPtr++);
    }
    else if(hsai->Init.DataSize <= SAI_DATASIZE_16)
    {
      hsai->Instance->DR = *((uint32_t *)hsai->pBuffPtr);
      hsai->pBuffPtr+= 2;
    }
    else
    {
      hsai->Instance->DR = *((uint32_t *)hsai->pBuffPtr);
      hsai->pBuffPtr+= 4;
    }
    hsai->XferCount--;
  }
}

/**
  * @brief  return the interrupt flag to set according the SAI setup 
  * @param  hsai : pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @param  mode : SAI_MODE_DMA or SAI_MODE_IT
  * @retval the list of the IT flag to enable
 */
static uint32_t SAI_InterruptFlag(SAI_HandleTypeDef *hsai, uint32_t mode)
{
  uint32_t tmpIT = SAI_IT_OVRUDR; 
  
  if(mode == SAI_MODE_IT)
  {
    tmpIT|= SAI_IT_FREQ;
  }
  
  if((hsai->Init.AudioMode == SAI_MODESLAVE_RX) || (hsai->Init.AudioMode == SAI_MODESLAVE_TX))
  {
    tmpIT|= SAI_IT_AFSDET | SAI_IT_LFSDET;
  }
  else
  {
    /* hsai has been configured in master mode */
    tmpIT|= SAI_IT_WCKCFG;
  }
  return tmpIT;
}

/**
  * @brief  disabled the SAI and wait the disabling
  * @param  hsai : pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval None.
  */
static HAL_StatusTypeDef SAI_Disable(SAI_HandleTypeDef *hsai)
{
  uint32_t tickstart = HAL_GetTick();
  HAL_StatusTypeDef status = HAL_OK;
  
  __HAL_SAI_DISABLE(hsai);
  while((hsai->Instance->CR1 & SAI_xCR1_SAIEN) != RESET)
  {
    /* Check for the Timeout */
    if((HAL_GetTick() - tickstart ) > SAI_TIMEOUT_VALUE)
    {         
      /* Update error code */
      hsai->ErrorCode |= HAL_SAI_ERROR_TIMEOUT;
      
      status = HAL_TIMEOUT;
      
      /* Change the SAI state */
      HAL_SAI_ErrorCallback(hsai);
    }
  }
  return status;
}

/**
  * @brief  Tx Handler for Transmit in Interrupt mode 8Bit transfer
  * @param  hsai : pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval None.
  */
static void SAI_Transmit_IT8Bit(SAI_HandleTypeDef *hsai)
{
  /* Write data on DR register */
  hsai->Instance->DR = (*hsai->pBuffPtr++);
  hsai->XferCount--;
  
  /* Handle the end of the transmission */
  if(hsai->XferCount == 0)
  {
    /* Disable FREQ and OVRUDR interrupts */
    __HAL_SAI_DISABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_IT)); 
    hsai->State = HAL_SAI_STATE_READY;
    HAL_SAI_TxCpltCallback(hsai);
  }
}

/**
  * @brief  Tx Handler for Transmit in Interrupt mode for 16Bit transfer
  * @param  hsai : pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval None.
  */
static void SAI_Transmit_IT16Bit(SAI_HandleTypeDef *hsai)
{
  /* Write data on DR register */
  hsai->Instance->DR = *(uint16_t *)hsai->pBuffPtr;
  hsai->pBuffPtr+=2;
  hsai->XferCount--;
  
  /* Handle the end of the transmission */
  if(hsai->XferCount == 0)
  {
    /* Disable FREQ and OVRUDR interrupts */
    __HAL_SAI_DISABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_IT)); 
    hsai->State = HAL_SAI_STATE_READY;
    HAL_SAI_TxCpltCallback(hsai);
  }
}

/**
  * @brief  Tx Handler for Transmit in Interrupt mode for 32Bit transfer
  * @param  hsai : pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval None.
  */
static void SAI_Transmit_IT32Bit(SAI_HandleTypeDef *hsai)
{
  /* Write data on DR register */
  hsai->Instance->DR = *(uint32_t *)hsai->pBuffPtr;
  hsai->pBuffPtr+=4;
  hsai->XferCount--;
  
  /* Handle the end of the transmission */
  if(hsai->XferCount == 0)
  {
    /* Disable FREQ and OVRUDR interrupts */
    __HAL_SAI_DISABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_IT)); 
    hsai->State = HAL_SAI_STATE_READY;
    HAL_SAI_TxCpltCallback(hsai);
  }
}

/**
  * @brief  Rx Handler for Receive in Interrupt mode 8Bit transfer
  * @param  hsai : pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval None.
  */
static void SAI_Receive_IT8Bit(SAI_HandleTypeDef *hsai)
{
  /* Receive data */    
  (*hsai->pBuffPtr++) = hsai->Instance->DR;
  hsai->XferCount--;
  
  /* Check end of the transfer */  
  if(hsai->XferCount == 0)
  {    
    /* Disable TXE and OVRUDR interrupts */
    __HAL_SAI_DISABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_IT));
    
    /* Clear the SAI Overrun flag */
    __HAL_SAI_CLEAR_FLAG(hsai, SAI_FLAG_OVRUDR);
    
    hsai->State = HAL_SAI_STATE_READY;
    HAL_SAI_RxCpltCallback(hsai); 
  }
}

/**
  * @brief  Rx Handler for Receive in Interrupt mode for 16Bit transfer
  * @param  hsai : pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval None.
  */
static void SAI_Receive_IT16Bit(SAI_HandleTypeDef *hsai)
{
  /* Receive data */    
  *(uint16_t*)hsai->pBuffPtr = hsai->Instance->DR;
  hsai->pBuffPtr+=2;
  hsai->XferCount--;
  
  /* Check end of the transfer */  
  if(hsai->XferCount == 0)
  {    
    /* Disable TXE and OVRUDR interrupts */
    __HAL_SAI_DISABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_IT));
    
    /* Clear the SAI Overrun flag */
    __HAL_SAI_CLEAR_FLAG(hsai, SAI_FLAG_OVRUDR);
    
    hsai->State = HAL_SAI_STATE_READY;
    HAL_SAI_RxCpltCallback(hsai); 
  }
}
/**
  * @brief  Rx Handler for Receive in Interrupt mode for 32Bit transfer
  * @param  hsai : pointer to a SAI_HandleTypeDef structure that contains
  *                the configuration information for SAI module.
  * @retval None.
  */
static void SAI_Receive_IT32Bit(SAI_HandleTypeDef *hsai)
{
  /* Receive data */    
  *(uint32_t*)hsai->pBuffPtr = hsai->Instance->DR;
  hsai->pBuffPtr+=4;
  hsai->XferCount--;
  
  /* Check end of the transfer */  
  if(hsai->XferCount == 0)
  {    
    /* Disable TXE and OVRUDR interrupts */
    __HAL_SAI_DISABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_IT));
    
    /* Clear the SAI Overrun flag */
    __HAL_SAI_CLEAR_FLAG(hsai, SAI_FLAG_OVRUDR);
    
    hsai->State = HAL_SAI_STATE_READY;
    HAL_SAI_RxCpltCallback(hsai); 
  }
}

/**
  * @brief DMA SAI transmit process complete callback.
  * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
  *                the configuration information for the specified DMA module.
  * @retval None
  */
static void SAI_DMATxCplt(DMA_HandleTypeDef *hdma)   
{
  uint32_t tickstart = 0;
  
  SAI_HandleTypeDef* hsai = (SAI_HandleTypeDef*)((DMA_HandleTypeDef* )hdma)->Parent;
  
  if((hdma->Instance->CR & DMA_SxCR_CIRC) == 0)
  { 
    hsai->XferCount = 0;
    
    /* Disable SAI Tx DMA Request */  
    hsai->Instance->CR1 &= (uint32_t)(~SAI_xCR1_DMAEN);
    
    /* Get tick */
    tickstart = HAL_GetTick();
    
    /* Set timeout: 10 is the max delay to send the remaining data in the SAI FIFO */
    /* Wait until FIFO is empty */    
    while(__HAL_SAI_GET_FLAG(hsai, SAI_xSR_FLVL) != RESET)
    {
      /* Check for the Timeout */
      if((HAL_GetTick() - tickstart ) > SAI_TIMEOUT_VALUE)
      {         
        /* Update error code */
        hsai->ErrorCode |= HAL_SAI_ERROR_TIMEOUT;
        
        /* Change the SAI state */
        HAL_SAI_ErrorCallback(hsai);
      }
    } 
    
    /* Stop the interrupts error handling */
    __HAL_SAI_DISABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_DMA));
    
    hsai->State= HAL_SAI_STATE_READY;
  }
  HAL_SAI_TxCpltCallback(hsai);
}

/**
  * @brief DMA SAI transmit process half complete callback 
  * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
  *                the configuration information for the specified DMA module.
  * @retval None
  */
static void SAI_DMATxHalfCplt(DMA_HandleTypeDef *hdma)
{
  SAI_HandleTypeDef* hsai = (SAI_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent;

  HAL_SAI_TxHalfCpltCallback(hsai);
}

/**
  * @brief DMA SAI receive process complete callback. 
  * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
  *                the configuration information for the specified DMA module.
  * @retval None
  */
static void SAI_DMARxCplt(DMA_HandleTypeDef *hdma)   
{
  SAI_HandleTypeDef* hsai = ( SAI_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
  if((hdma->Instance->CR & DMA_SxCR_CIRC) == 0)
  {
    /* Disable Rx DMA Request */
    hsai->Instance->CR1 &= (uint32_t)(~SAI_xCR1_DMAEN);
    hsai->XferCount = 0;
    
    /* Stop the interrupts error handling */
    __HAL_SAI_DISABLE_IT(hsai, SAI_InterruptFlag(hsai, SAI_MODE_DMA));
    
    hsai->State = HAL_SAI_STATE_READY;
  }
  HAL_SAI_RxCpltCallback(hsai); 
}

/**
  * @brief DMA SAI receive process half complete callback 
  * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
  *                the configuration information for the specified DMA module.
  * @retval None
  */
static void SAI_DMARxHalfCplt(DMA_HandleTypeDef *hdma)
{
  SAI_HandleTypeDef* hsai = (SAI_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent;

  HAL_SAI_RxHalfCpltCallback(hsai); 
}
/**
  * @brief DMA SAI communication error callback. 
  * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
  *                the configuration information for the specified DMA module.
  * @retval None
  */
static void SAI_DMAError(DMA_HandleTypeDef *hdma)   
{
  SAI_HandleTypeDef* hsai = ( SAI_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
  
  /* Stop the DMA transfer */
  HAL_SAI_DMAStop(hsai);
  
  /* Set the SAI state ready to be able to start again the process */
  hsai->State= HAL_SAI_STATE_READY;
  HAL_SAI_ErrorCallback(hsai);
  
  hsai->XferCount = 0;
}

/**
  * @}
  */

#endif /* STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx || STM32F446xx */
#endif /* HAL_SAI_MODULE_ENABLED */
/**
  * @}
  */

/**
  * @}
  */

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