summaryrefslogtreecommitdiff
path: root/cdc-dials/Drivers/STM32F0xx_HAL_Driver/Src/stm32f0xx_hal_dac.c
blob: 86a2fc2bebe7120a665f6a5386380bdb1a3177fc (plain)
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
/**
  ******************************************************************************
  * @file    stm32f0xx_hal_dac.c
  * @author  MCD Application Team
  * @brief   DAC HAL module driver.
  *         This file provides firmware functions to manage the following 
  *         functionalities of the Digital to Analog Converter (DAC) peripheral:
  *           + Initialization and de-initialization functions
  *           + IO operation functions
  *           + Peripheral Control functions
  *           + Peripheral State and Errors functions      
  *     
  *
  @verbatim      
  ==============================================================================
                      ##### DAC Peripheral features #####
  ==============================================================================
    [..]        
      *** DAC Channels ***
      ====================  
    [..]  
    STM32F0 devices integrates no, one or two 12-bit Digital Analog Converters.
    STM32F05x devices have one converter (channel1)
    STM32F07x & STM32F09x devices have two converters (i.e. channel1 & channel2)

    When 2 converters are present (i.e. channel1 & channel2)  they 
    can be used independently or simultaneously (dual mode):
      (#) DAC channel1 with DAC_OUT1 (PA4) as output
      (#) DAC channel2 with DAC_OUT2 (PA5) as output
      
      *** DAC Triggers ***
      ====================
    [..]
    Digital to Analog conversion can be non-triggered using DAC_TRIGGER_NONE
    and DAC_OUT1/DAC_OUT2 is available once writing to DHRx register. 
    [..] 
    Digital to Analog conversion can be triggered by:
      (#) External event: EXTI Line 9 (any GPIOx_PIN_9) using DAC_TRIGGER_EXT_IT9.
          The used pin (GPIOx_PIN_9) must be configured in input mode.
  
      (#) Timers TRGO: TIM2, TIM3, TIM6, and TIM15 
          (DAC_TRIGGER_T2_TRGO, DAC_TRIGGER_T3_TRGO...)
  
      (#) Software using DAC_TRIGGER_SOFTWARE
  
      *** DAC Buffer mode feature ***
      =============================== 
      [..] 
      Each DAC channel integrates an output buffer that can be used to 
      reduce the output impedance, and to drive external loads directly
      without having to add an external operational amplifier.
      To enable, the output buffer use  
      sConfig.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
      [..]           
      (@) Refer to the device datasheet for more details about output 
          impedance value with and without output buffer.

      *** GPIO configurations guidelines ***
      =====================
      [..] 
      When a DAC channel is used (ex channel1 on PA4) and the other is not 
      (ex channel1 on PA5 is configured in Analog and disabled).
      Channel1 may disturb channel2 as coupling effect.
      Note that there is no coupling on channel2 as soon as channel2 is turned on.
      Coupling on adjacent channel could be avoided as follows:
      when unused PA5 is configured as INPUT PULL-UP or DOWN. 
      PA5 is configured in ANALOG just before it is turned on.     
            
       *** DAC wave generation feature ***
       =================================== 
       [..]     
       Both DAC channels can be used to generate
         (#) Noise wave 
         (#) Triangle wave
            
       *** DAC data format ***
       =======================
       [..]   
       The DAC data format can be:
         (#) 8-bit right alignment using DAC_ALIGN_8B_R
         (#) 12-bit left alignment using DAC_ALIGN_12B_L
         (#) 12-bit right alignment using DAC_ALIGN_12B_R
  
       *** DAC data value to voltage correspondance ***  
       ================================================ 
       [..] 
       The analog output voltage on each DAC channel pin is determined
       by the following equation: 
       [..]
       DAC_OUTx = VREF+ * DOR / 4095
       (+) with  DOR is the Data Output Register
       [..]
          VEF+ is the input voltage reference (refer to the device datasheet)
       [..]
        e.g. To set DAC_OUT1 to 0.7V, use
       (+) Assuming that VREF+ = 3.3V, DAC_OUT1 = (3.3 * 868) / 4095 = 0.7V
  
       *** DMA requests  ***
       =====================
       [..]    
       A DMA1 request can be generated when an external trigger (but not
       a software trigger) occurs if DMA1 requests are enabled using
       HAL_DAC_Start_DMA()
       [..]
       DMA1 requests are mapped as following:
         (#) DAC channel1 : mapped on DMA1 channel3 which must be 
             already configured
         (#) DAC channel2 : mapped on DMA1 channel4 which must be 
             already configured
       
    (@) For Dual mode and specific signal (Triangle and noise) generation please 
        refer to Extended Features Driver description        
        STM32F0 devices with one channel (one converting capability) does not
        support Dual mode and specific signal (Triangle and noise) generation.
      
                      ##### How to use this driver #####
  ==============================================================================
    [..]          
      (+) DAC APB clock must be enabled to get write access to DAC
          registers using HAL_DAC_Init()
      (+) Configure DAC_OUTx (DAC_OUT1: PA4, DAC_OUT2: PA5) in analog mode.
      (+) Configure the DAC channel using HAL_DAC_ConfigChannel() function.
      (+) Enable the DAC channel using HAL_DAC_Start() or HAL_DAC_Start_DMA() functions.

     *** Polling mode IO operation ***
     =================================
     [..]    
       (+) Start the DAC peripheral using HAL_DAC_Start() 
       (+) To read the DAC last data output value, use the HAL_DAC_GetValue() function.
       (+) Stop the DAC peripheral using HAL_DAC_Stop()
       
     *** DMA mode IO operation ***    
     ==============================
     [..]    
       (+) Start the DAC peripheral using HAL_DAC_Start_DMA(), at this stage the user specify the length 
           of data to be transferred at each end of conversion
       (+) At the middle of data transfer HAL_DAC_ConvHalfCpltCallbackCh1() or HAL_DACEx_ConvHalfCpltCallbackCh2()  
           function is executed and user can add his own code by customization of function pointer 
           HAL_DAC_ConvHalfCpltCallbackCh1() or HAL_DACEx_ConvHalfCpltCallbackCh2()
       (+) At The end of data transfer HAL_DAC_ConvCpltCallbackCh1() or HAL_DACEx_ConvHalfCpltCallbackCh2()  
           function is executed and user can add his own code by customization of function pointer 
           HAL_DAC_ConvCpltCallbackCh1() or HAL_DACEx_ConvHalfCpltCallbackCh2()
       (+) In case of transfer Error, HAL_DAC_ErrorCallbackCh1() function is executed and user can 
            add his own code by customization of function pointer HAL_DAC_ErrorCallbackCh1
       (+) In case of DMA underrun, DAC interruption triggers and execute internal function HAL_DAC_IRQHandler.
           HAL_DAC_DMAUnderrunCallbackCh1() or HAL_DACEx_DMAUnderrunCallbackCh2()  
           function is executed and user can add his own code by customization of function pointer 
           HAL_DAC_DMAUnderrunCallbackCh1() or HAL_DACEx_DMAUnderrunCallbackCh2() and
           add his own code by customization of function pointer HAL_DAC_ErrorCallbackCh1()
       (+) Stop the DAC peripheral using HAL_DAC_Stop_DMA()

    *** Callback registration ***
    =============================================
    [..]
      The compilation define  USE_HAL_DAC_REGISTER_CALLBACKS when set to 1
      allows the user to configure dynamically the driver callbacks.

    Use Functions @ref HAL_DAC_RegisterCallback() to register a user callback,
      it allows to register following callbacks:
      (+) ConvCpltCallbackCh1     : callback when a half transfer is completed on Ch1.                 
      (+) ConvHalfCpltCallbackCh1 : callback when a transfer is completed on Ch1.
      (+) ErrorCallbackCh1        : callback when an error occurs on Ch1.
      (+) DMAUnderrunCallbackCh1  : callback when an error occurs on Ch1.
      (+) ConvCpltCallbackCh2     : callback when a half transfer is completed on Ch2.   
      (+) ConvHalfCpltCallbackCh2 : callback when a transfer is completed on Ch2.        
      (+) ErrorCallbackCh2        : callback when an error occurs on Ch2.                
      (+) DMAUnderrunCallbackCh2  : callback when an error occurs on Ch2.                
      (+) MspInitCallback         : DAC MspInit.  
      (+) MspDeInitCallback       : DAC MspdeInit.
      This function takes as parameters the HAL peripheral handle, the Callback ID
      and a pointer to the user callback function.

    Use function @ref HAL_DAC_UnRegisterCallback() to reset a callback to the default
      weak (surcharged) function. It allows to reset following callbacks:
      (+) ConvCpltCallbackCh1     : callback when a half transfer is completed on Ch1.                 
      (+) ConvHalfCpltCallbackCh1 : callback when a transfer is completed on Ch1.
      (+) ErrorCallbackCh1        : callback when an error occurs on Ch1.
      (+) DMAUnderrunCallbackCh1  : callback when an error occurs on Ch1.
      (+) ConvCpltCallbackCh2     : callback when a half transfer is completed on Ch2.   
      (+) ConvHalfCpltCallbackCh2 : callback when a transfer is completed on Ch2.        
      (+) ErrorCallbackCh2        : callback when an error occurs on Ch2.                
      (+) DMAUnderrunCallbackCh2  : callback when an error occurs on Ch2.                
      (+) MspInitCallback         : DAC MspInit.  
      (+) MspDeInitCallback       : DAC MspdeInit.
      (+) All Callbacks
      This function) takes as parameters the HAL peripheral handle and the Callback ID.

      By default, after the @ref HAL_DAC_Init and if the state is HAL_DAC_STATE_RESET
      all callbacks are reset to the corresponding legacy weak (surcharged) functions.
      Exception done for MspInit and MspDeInit callbacks that are respectively
      reset to the legacy weak (surcharged) functions in the @ref HAL_DAC_Init 
      and @ref  HAL_DAC_DeInit only when these callbacks are null (not registered beforehand).
      If not, MspInit or MspDeInit are not null, the @ref HAL_DAC_Init and @ref HAL_DAC_DeInit
      keep and use the user MspInit/MspDeInit callbacks (registered beforehand)

      Callbacks can be registered/unregistered in READY state only.
      Exception done for MspInit/MspDeInit callbacks that can be registered/unregistered
      in READY or RESET state, thus registered (user) MspInit/DeInit callbacks can be used
      during the Init/DeInit.
      In that case first register the MspInit/MspDeInit user callbacks
      using @ref HAL_DAC_RegisterCallback before calling @ref HAL_DAC_DeInit 
      or @ref HAL_DAC_Init function.

      When The compilation define USE_HAL_DAC_REGISTER_CALLBACKS is set to 0 or
      not defined, the callback registering feature is not available 
      and weak (surcharged) callbacks are used.

     *** DAC HAL driver macros list ***
     ============================================= 
     [..]
       Below the list of most used macros in DAC HAL driver.
       
      (+) __HAL_DAC_ENABLE : Enable the DAC peripheral
      (+) __HAL_DAC_DISABLE : Disable the DAC peripheral
      (+) __HAL_DAC_CLEAR_FLAG: Clear the DAC's pending flags
      (+) __HAL_DAC_GET_FLAG: Get the selected DAC's flag status
      
     [..]
      (@) You can refer to the DAC HAL driver header file for more useful macros  
   
 @endverbatim    
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */


/* Includes ------------------------------------------------------------------*/
#include "stm32f0xx_hal.h"

/** @addtogroup STM32F0xx_HAL_Driver
  * @{
  */

#ifdef HAL_DAC_MODULE_ENABLED

#if defined (DAC1)

/** @defgroup DAC DAC
  * @brief DAC driver modules
  * @{
  */ 

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/** @defgroup DAC_Private_Macros DAC Private Macros
  * @{
  */
/**
  * @}
  */

/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/** @defgroup DAC_Private_Functions DAC Private Functions
  * @{
  */
/**
  * @}
  */

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

/** @defgroup DAC_Exported_Functions DAC Exported Functions
  * @{
  */

/** @defgroup DAC_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:
      (+) Initialize and configure the DAC. 
      (+) De-initialize the DAC. 
         
@endverbatim
  * @{
  */

/**
  * @brief  Initialize the DAC peripheral according to the specified parameters
  *         in the DAC_InitStruct and initialize the associated handle.
  * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  *         the configuration information for the specified DAC.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_DAC_Init(DAC_HandleTypeDef* hdac)
{ 
  /* Check DAC handle */
  if(hdac == NULL)
  {
     return HAL_ERROR;
  }
  /* Check the parameters */
  assert_param(IS_DAC_ALL_INSTANCE(hdac->Instance));
  
  if (hdac->State == HAL_DAC_STATE_RESET)
  {
#if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
    /* Init the DAC Callback settings */
    hdac->ConvCpltCallbackCh1           = HAL_DAC_ConvCpltCallbackCh1;
    hdac->ConvHalfCpltCallbackCh1       = HAL_DAC_ConvHalfCpltCallbackCh1;
    hdac->ErrorCallbackCh1              = HAL_DAC_ErrorCallbackCh1;
    hdac->DMAUnderrunCallbackCh1        = HAL_DAC_DMAUnderrunCallbackCh1;

    hdac->ConvCpltCallbackCh2           = HAL_DACEx_ConvCpltCallbackCh2;
    hdac->ConvHalfCpltCallbackCh2       = HAL_DACEx_ConvHalfCpltCallbackCh2;
    hdac->ErrorCallbackCh2              = HAL_DACEx_ErrorCallbackCh2;
    hdac->DMAUnderrunCallbackCh2        = HAL_DACEx_DMAUnderrunCallbackCh2;

    if (hdac->MspInitCallback == NULL)
    {
      hdac->MspInitCallback             = HAL_DAC_MspInit;
    }
#endif /* USE_HAL_DAC_REGISTER_CALLBACKS */

    /* Allocate lock resource and initialize it */
    hdac->Lock = HAL_UNLOCKED;

#if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
    /* Init the low level hardware */
    hdac->MspInitCallback(hdac);
#else
    /* Init the low level hardware */
    HAL_DAC_MspInit(hdac);
#endif /* USE_HAL_DAC_REGISTER_CALLBACKS */
  }
  
  /* Initialize the DAC state*/
  hdac->State = HAL_DAC_STATE_BUSY;
  
  /* Set DAC error code to none */
  hdac->ErrorCode = HAL_DAC_ERROR_NONE;
  
  /* Initialize the DAC state*/
  hdac->State = HAL_DAC_STATE_READY;
  
  /* Return function status */
  return HAL_OK;
}

/**
  * @brief  Deinitialize the DAC peripheral registers to their default reset values.
  * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  *         the configuration information for the specified DAC.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_DAC_DeInit(DAC_HandleTypeDef* hdac)
{
  /* Check DAC handle */
  if(hdac == NULL)
  {
     return HAL_ERROR;
  }

  /* Check the parameters */
  assert_param(IS_DAC_ALL_INSTANCE(hdac->Instance));

  /* Change DAC state */
  hdac->State = HAL_DAC_STATE_BUSY;

#if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
  if(hdac->MspDeInitCallback == NULL)
  {
    hdac->MspDeInitCallback = HAL_DAC_MspDeInit;
  }
  /* DeInit the low level hardware */
  hdac->MspDeInitCallback(hdac);
  
#else 
  /* DeInit the low level hardware */
  HAL_DAC_MspDeInit(hdac);
#endif /* USE_HAL_DAC_REGISTER_CALLBACKS */

  /* Set DAC error code to none */
  hdac->ErrorCode = HAL_DAC_ERROR_NONE;

  /* Change DAC state */
  hdac->State = HAL_DAC_STATE_RESET;

  /* Release Lock */
  __HAL_UNLOCK(hdac);

  /* Return function status */
  return HAL_OK;
}

/**
  * @brief  Initialize the DAC MSP.
  * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  *         the configuration information for the specified DAC.
  * @retval None
  */
__weak void HAL_DAC_MspInit(DAC_HandleTypeDef* hdac)
{ 
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hdac);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_DAC_MspInit could be implemented in the user file
   */ 
}

/**
  * @brief  DeInitialize the DAC MSP.
  * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  *         the configuration information for the specified DAC.  
  * @retval None
  */
__weak void HAL_DAC_MspDeInit(DAC_HandleTypeDef* hdac)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hdac);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_DAC_MspDeInit could be implemented in the user file
   */ 
}

/**
  * @}
  */

/** @defgroup DAC_Exported_Functions_Group2 IO operation functions
 *  @brief    IO operation functions 
 *
@verbatim   
  ==============================================================================
             ##### IO operation functions #####
  ==============================================================================  
    [..]  This section provides functions allowing to:
      (+) Start conversion.
      (+) Stop conversion.
      (+) Start conversion and enable DMA transfer.
      (+) Stop conversion and disable DMA transfer.
      (+) Set the specified data holding register value for DAC channel.
                     
@endverbatim
  * @{
  */

/**
  * @brief  Enables DAC and starts conversion of channel.
  * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  *         the configuration information for the specified DAC.
  * @param  Channel The selected DAC channel. 
  *          This parameter can be one of the following values:
  *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  * @retval HAL status
  */
__weak HAL_StatusTypeDef HAL_DAC_Start(DAC_HandleTypeDef* hdac, uint32_t Channel)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hdac);
  UNUSED(Channel);

  /* Note : This function is defined into this file for library reference. */
  /*        Function content is located into file stm32f0xx_hal_dac_ex.c   */
  
  /* Return error status as not implemented here */
  return HAL_ERROR;
}

/**
  * @brief  Disables DAC and stop conversion of channel.
  * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  *         the configuration information for the specified DAC.
  * @param  Channel The selected DAC channel. 
  *          This parameter can be one of the following values:
  *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  *            @arg DAC_CHANNEL_2: DAC Channel2 selected  
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_DAC_Stop(DAC_HandleTypeDef* hdac, uint32_t Channel)
{
  /* Check the parameters */
  assert_param(IS_DAC_CHANNEL(Channel));
  
  /* Disable the Peripheral */
  __HAL_DAC_DISABLE(hdac, Channel);
  
  /* Change DAC state */
  hdac->State = HAL_DAC_STATE_READY;
  
  /* Return function status */
  return HAL_OK;
}

/**
  * @brief  Enables DAC and starts conversion of channel.
  * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  *         the configuration information for the specified DAC.
  * @param  Channel The selected DAC channel. 
  *          This parameter can be one of the following values:
  *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  * @param  pData The destination peripheral Buffer address.
  * @param  Length The length of data to be transferred from memory to DAC peripheral
  * @param  Alignment Specifies the data alignment for DAC channel.
  *          This parameter can be one of the following values:
  *            @arg DAC_ALIGN_8B_R: 8bit right data alignment selected
  *            @arg DAC_ALIGN_12B_L: 12bit left data alignment selected
  *            @arg DAC_ALIGN_12B_R: 12bit right data alignment selected
  * @retval HAL status
  */
__weak HAL_StatusTypeDef HAL_DAC_Start_DMA(DAC_HandleTypeDef* hdac, uint32_t Channel, uint32_t* pData, uint32_t Length, uint32_t Alignment)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hdac);
  UNUSED(Channel);
  UNUSED(pData);
  UNUSED(Length);
  UNUSED(Alignment);

  /* Note : This function is defined into this file for library reference. */
  /*        Function content is located into file stm32f0xx_hal_dac_ex.c   */
  
  /* Return error status as not implemented here */
  return HAL_ERROR;
}

/**
  * @brief  Disables DAC and stop conversion of channel.
  * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  *         the configuration information for the specified DAC.
  * @param  Channel The selected DAC channel. 
  *          This parameter can be one of the following values:
  *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  *            @arg DAC_CHANNEL_2: DAC Channel2 selected   
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_DAC_Stop_DMA(DAC_HandleTypeDef* hdac, uint32_t Channel)
{
   HAL_StatusTypeDef status = HAL_OK;
    
  /* Check the parameters */
  assert_param(IS_DAC_CHANNEL(Channel));
  
  /* Disable the selected DAC channel DMA request */
    hdac->Instance->CR &= ~(DAC_CR_DMAEN1 << Channel);
    
  /* Disable the Peripheral */
  __HAL_DAC_DISABLE(hdac, Channel);
  
  /* Disable the DMA channel */
  /* Channel1 is used */
  if (Channel == DAC_CHANNEL_1)
  {
    /* Disable the DMA channel */
    status = HAL_DMA_Abort(hdac->DMA_Handle1);   
    
    /* Disable the DAC DMA underrun interrupt */
    __HAL_DAC_DISABLE_IT(hdac, DAC_IT_DMAUDR1);
  }

#if defined(DAC_CHANNEL2_SUPPORT)
  
  else /* Channel2 is used */
  {
    /* Disable the DMA channel */
    status = HAL_DMA_Abort(hdac->DMA_Handle2);   
    
    /* Disable the DAC DMA underrun interrupt */
    __HAL_DAC_DISABLE_IT(hdac, DAC_IT_DMAUDR2);
  }
#endif  /* DAC_CHANNEL2_SUPPORT */ 
  
  /* Check if DMA Channel effectively disabled */
  if (status != HAL_OK)
  {
  /* Update DAC state machine to error */
  hdac->State = HAL_DAC_STATE_ERROR; 
  }
  else
  {
  /* Change DAC state */
  hdac->State = HAL_DAC_STATE_READY;
  }

  /* Return function status */
  return status;
}

/**
  * @brief  Handles DAC interrupt request  
  * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  *         the configuration information for the specified DAC.
  * @retval None
  */
__weak void HAL_DAC_IRQHandler(DAC_HandleTypeDef* hdac)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hdac);

  /* Note : This function is defined into this file for library reference. */
  /*        Function content is located into file stm32f0xx_hal_dac_ex.c   */
}

/**
  * @brief  Set the specified data holding register value for DAC channel.
  * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  *         the configuration information for the specified DAC.
  * @param  Channel The selected DAC channel. 
  *          This parameter can be one of the following values:
  *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  *            @arg DAC_CHANNEL_2: DAC Channel2 selected  
  * @param  Alignment Specifies the data alignment.
  *          This parameter can be one of the following values:
  *            @arg DAC_ALIGN_8B_R: 8bit right data alignment selected
  *            @arg DAC_ALIGN_12B_L: 12bit left data alignment selected
  *            @arg DAC_ALIGN_12B_R: 12bit right data alignment selected
  * @param  Data Data to be loaded in the selected data holding register.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_DAC_SetValue(DAC_HandleTypeDef* hdac, uint32_t Channel, uint32_t Alignment, uint32_t Data)
{  
  __IO uint32_t tmp = 0;
  
  /* Check the parameters */
  assert_param(IS_DAC_CHANNEL(Channel));
  assert_param(IS_DAC_ALIGN(Alignment));
  assert_param(IS_DAC_DATA(Data));
  
  tmp = (uint32_t)hdac->Instance; 
  if(Channel == DAC_CHANNEL_1)
  {
    tmp += DAC_DHR12R1_ALIGNMENT(Alignment);
  }
  else
  {
    tmp += DAC_DHR12R2_ALIGNMENT(Alignment);
  }

  /* Set the DAC channel1 selected data holding register */
  *(__IO uint32_t *) tmp = Data;
  
  /* Return function status */
  return HAL_OK;
}

/**
  * @brief  Conversion complete callback in non blocking mode for Channel1 
  * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  *         the configuration information for the specified DAC.
  * @retval None
  */
__weak void HAL_DAC_ConvCpltCallbackCh1(DAC_HandleTypeDef* hdac)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hdac);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_DAC_ConvCpltCallbackCh1 could be implemented in the user file
   */
}

/**
  * @brief  Conversion half DMA transfer callback in non-blocking mode for Channel1 
  * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  *         the configuration information for the specified DAC.
  * @retval None
  */
__weak void HAL_DAC_ConvHalfCpltCallbackCh1(DAC_HandleTypeDef* hdac)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hdac);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_DAC_ConvHalfCpltCallbackCh1 could be implemented in the user file
   */
}

/**
  * @brief  Error DAC callback for Channel1.
  * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  *         the configuration information for the specified DAC.
  * @retval None
  */
__weak void HAL_DAC_ErrorCallbackCh1(DAC_HandleTypeDef *hdac)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hdac);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_DAC_ErrorCallbackCh1 could be implemented in the user file
   */
}

/**
  * @brief  DMA underrun DAC callback for channel1.
  * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  *         the configuration information for the specified DAC.
  * @retval None
  */
__weak void HAL_DAC_DMAUnderrunCallbackCh1(DAC_HandleTypeDef *hdac)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hdac);

  /* NOTE : This function should not be modified, when the callback is needed,
            the HAL_DAC_DMAUnderrunCallbackCh1 could be implemented in the user file
   */
}

/**
  * @}
  */
  
/** @defgroup DAC_Exported_Functions_Group3 Peripheral Control functions
 *  @brief    Peripheral Control functions 
 *
@verbatim
  ==============================================================================
             ##### Peripheral Control functions #####
  ==============================================================================  
    [..]  This section provides functions allowing to:
      (+) Configure channels. 
      (+) Get result of conversion.
      
@endverbatim
  * @{
  */

/**
  * @brief  Returns the last data output value of the selected DAC channel.
  * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  *         the configuration information for the specified DAC.
  * @param  Channel The selected DAC channel. 
  *          This parameter can be one of the following values:
  *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  * @retval The selected DAC channel data output value.
  */
__weak uint32_t HAL_DAC_GetValue(DAC_HandleTypeDef* hdac, uint32_t Channel)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hdac);
  UNUSED(Channel);

  /* Note : This function is defined into this file for library reference. */
  /*        Function content is located into file stm32f0xx_hal_dac_ex.c   */
  
  /* Return error status as not implemented here */
  return HAL_ERROR;
}

/**
  * @brief  Configures the selected DAC channel.
  * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  *         the configuration information for the specified DAC.
  * @param  sConfig DAC configuration structure.
  * @param  Channel The selected DAC channel. 
  *          This parameter can be one of the following values:
  *            @arg DAC_CHANNEL_1: DAC Channel1 selected
  *            @arg DAC_CHANNEL_2: DAC Channel2 selected
  * @retval HAL status
  */
__weak HAL_StatusTypeDef HAL_DAC_ConfigChannel(DAC_HandleTypeDef* hdac, DAC_ChannelConfTypeDef* sConfig, uint32_t Channel)
{
  /* Prevent unused argument(s) compilation warning */
  UNUSED(hdac);
  UNUSED(sConfig);
  UNUSED(Channel);

  /* Note : This function is defined into this file for library reference. */
  /*        Function content is located into file stm32f0xx_hal_dac_ex.c   */
  
  /* Return error status as not implemented here */
  return HAL_ERROR;
}

/**
  * @}
  */

/** @defgroup DAC_Exported_Functions_Group4 Peripheral State and Errors functions
 *  @brief   Peripheral State and Errors functions 
 *
@verbatim   
  ==============================================================================
            ##### Peripheral State and Errors functions #####
  ==============================================================================  
    [..]
    This subsection provides functions allowing to
      (+) Check the DAC state.
      (+) Check the DAC Errors.
        
@endverbatim
  * @{
  */

/**
  * @brief  return the DAC handle state
  * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  *         the configuration information for the specified DAC.
  * @retval HAL state
  */
HAL_DAC_StateTypeDef HAL_DAC_GetState(DAC_HandleTypeDef* hdac)
{
  /* Return DAC handle state */
  return hdac->State;
}


/**
  * @brief  Return the DAC error code
  * @param  hdac pointer to a DAC_HandleTypeDef structure that contains
  *         the configuration information for the specified DAC.
  * @retval DAC Error Code
  */
uint32_t HAL_DAC_GetError(DAC_HandleTypeDef *hdac)
{
  return hdac->ErrorCode;
}

/**
  * @}
  */


/**
  * @}
  */

/** @addtogroup DAC_Exported_Functions
  * @{
  */

/** @addtogroup DAC_Exported_Functions_Group1
  * @{
  */
#if (USE_HAL_DAC_REGISTER_CALLBACKS == 1)
/**
  * @brief  Register a User DAC Callback
  *         To be used instead of the weak (surcharged) predefined callback
  * @param  hdac DAC handle
  * @param  CallbackID ID of the callback to be registered
  *         This parameter can be one of the following values:
  *          @arg @ref HAL_DAC_ERROR_INVALID_CALLBACK   DAC Error Callback ID
  *          @arg @ref HAL_DAC_CH1_COMPLETE_CB_ID       DAC CH1 Complete Callback ID
  *          @arg @ref HAL_DAC_CH1_HALF_COMPLETE_CB_ID  DAC CH1 Half Complete Callback ID
  *          @arg @ref HAL_DAC_CH1_ERROR_ID             DAC CH1 Error Callback ID
  *          @arg @ref HAL_DAC_CH1_UNDERRUN_CB_ID       DAC CH1 UnderRun Callback ID
  *          @arg @ref HAL_DAC_CH2_COMPLETE_CB_ID       DAC CH2 Complete Callback ID
  *          @arg @ref HAL_DAC_CH2_HALF_COMPLETE_CB_ID  DAC CH2 Half Complete Callback ID
  *          @arg @ref HAL_DAC_CH2_ERROR_ID             DAC CH2 Error Callback ID
  *          @arg @ref HAL_DAC_CH2_UNDERRUN_CB_ID       DAC CH2 UnderRun Callback ID
  *          @arg @ref HAL_DAC_MSPINIT_CB_ID            DAC MSP Init Callback ID
  *          @arg @ref HAL_DAC_MSPDEINIT_CB_ID          DAC MSP DeInit Callback ID
  *
  * @param  pCallback pointer to the Callback function
  * @retval status
  */
HAL_StatusTypeDef HAL_DAC_RegisterCallback(DAC_HandleTypeDef *hdac, HAL_DAC_CallbackIDTypeDef CallbackID,
                                           pDAC_CallbackTypeDef pCallback)
{
  HAL_StatusTypeDef status = HAL_OK;

  if (pCallback == NULL)
  {
    /* Update the error code */
    hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
    return HAL_ERROR;
  }

  /* Process locked */
  __HAL_LOCK(hdac);

  if (hdac->State == HAL_DAC_STATE_READY)
  {
    switch (CallbackID)
    {
    case HAL_DAC_CH1_COMPLETE_CB_ID :
      hdac->ConvCpltCallbackCh1 = pCallback;
      break;
    case HAL_DAC_CH1_HALF_COMPLETE_CB_ID :
      hdac->ConvHalfCpltCallbackCh1 = pCallback;
      break;
    case HAL_DAC_CH1_ERROR_ID :
      hdac->ErrorCallbackCh1 = pCallback;
      break;
    case HAL_DAC_CH1_UNDERRUN_CB_ID :
      hdac->DMAUnderrunCallbackCh1 = pCallback;
      break;
    case HAL_DAC_CH2_COMPLETE_CB_ID :
      hdac->ConvCpltCallbackCh2 = pCallback;
      break;
    case HAL_DAC_CH2_HALF_COMPLETE_CB_ID :
      hdac->ConvHalfCpltCallbackCh2 = pCallback;
      break;
    case HAL_DAC_CH2_ERROR_ID :
      hdac->ErrorCallbackCh2 = pCallback;
      break;
    case HAL_DAC_CH2_UNDERRUN_CB_ID :
      hdac->DMAUnderrunCallbackCh2 = pCallback;
      break;
    case HAL_DAC_MSPINIT_CB_ID :
      hdac->MspInitCallback = pCallback;
      break;
    case HAL_DAC_MSPDEINIT_CB_ID :
      hdac->MspDeInitCallback = pCallback;
      break;
    default :
      /* Update the error code */
      hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
      /* update return status */
      status =  HAL_ERROR;
      break;
    }
  }
  else if (hdac->State == HAL_DAC_STATE_RESET)
  {
    switch (CallbackID)
    {
    case HAL_DAC_MSPINIT_CB_ID :
      hdac->MspInitCallback = pCallback;
      break;
    case HAL_DAC_MSPDEINIT_CB_ID :
      hdac->MspDeInitCallback = pCallback;
      break;
    default :
      /* Update the error code */
      hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
      /* update return status */
      status =  HAL_ERROR;
      break;
    }
  }
  else
  {
    /* Update the error code */
    hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
    /* update return status */
    status =  HAL_ERROR;
  }

  /* Release Lock */
  __HAL_UNLOCK(hdac);
  return status;
}

/**
  * @brief  Unregister a User DAC Callback
  *         DAC Callback is redirected to the weak (surcharged) predefined callback
  * @param  hdac DAC handle
  * @param  CallbackID ID of the callback to be unregistered
  *         This parameter can be one of the following values:
  *          @arg @ref HAL_DAC_CH1_COMPLETE_CB_ID          DAC CH1 tranfer Complete Callback ID
  *          @arg @ref HAL_DAC_CH1_HALF_COMPLETE_CB_ID     DAC CH1 Half Complete Callback ID
  *          @arg @ref HAL_DAC_CH1_ERROR_ID                DAC CH1 Error Callback ID
  *          @arg @ref HAL_DAC_CH1_UNDERRUN_CB_ID          DAC CH1 UnderRun Callback ID
  *          @arg @ref HAL_DAC_CH2_COMPLETE_CB_ID          DAC CH2 Complete Callback ID
  *          @arg @ref HAL_DAC_CH2_HALF_COMPLETE_CB_ID     DAC CH2 Half Complete Callback ID
  *          @arg @ref HAL_DAC_CH2_ERROR_ID                DAC CH2 Error Callback ID
  *          @arg @ref HAL_DAC_CH2_UNDERRUN_CB_ID          DAC CH2 UnderRun Callback ID
  *          @arg @ref HAL_DAC_MSPINIT_CB_ID               DAC MSP Init Callback ID
  *          @arg @ref HAL_DAC_MSPDEINIT_CB_ID             DAC MSP DeInit Callback ID
  *          @arg @ref HAL_DAC_ALL_CB_ID                   DAC All callbacks
  * @retval status
  */
HAL_StatusTypeDef HAL_DAC_UnRegisterCallback(DAC_HandleTypeDef *hdac, HAL_DAC_CallbackIDTypeDef CallbackID)
{
  HAL_StatusTypeDef status = HAL_OK;

  /* Process locked */
  __HAL_LOCK(hdac);

  if (hdac->State == HAL_DAC_STATE_READY)
  {
    switch (CallbackID)
    {
    case HAL_DAC_CH1_COMPLETE_CB_ID :
      hdac->ConvCpltCallbackCh1 = HAL_DAC_ConvCpltCallbackCh1;
      break;
    case HAL_DAC_CH1_HALF_COMPLETE_CB_ID :
      hdac->ConvHalfCpltCallbackCh1 = HAL_DAC_ConvHalfCpltCallbackCh1;
      break;
    case HAL_DAC_CH1_ERROR_ID :
      hdac->ErrorCallbackCh1 = HAL_DAC_ErrorCallbackCh1;
      break;
    case HAL_DAC_CH1_UNDERRUN_CB_ID :
      hdac->DMAUnderrunCallbackCh1 = HAL_DAC_DMAUnderrunCallbackCh1;
      break;
    case HAL_DAC_CH2_COMPLETE_CB_ID :
      hdac->ConvCpltCallbackCh2 = HAL_DACEx_ConvCpltCallbackCh2;
      break;
    case HAL_DAC_CH2_HALF_COMPLETE_CB_ID :
      hdac->ConvHalfCpltCallbackCh2 = HAL_DACEx_ConvHalfCpltCallbackCh2;
      break;
    case HAL_DAC_CH2_ERROR_ID :
      hdac->ErrorCallbackCh2 = HAL_DACEx_ErrorCallbackCh2;
      break;
    case HAL_DAC_CH2_UNDERRUN_CB_ID :
      hdac->DMAUnderrunCallbackCh2 = HAL_DACEx_DMAUnderrunCallbackCh2;
      break;
    case HAL_DAC_MSPINIT_CB_ID :
      hdac->MspInitCallback = HAL_DAC_MspInit;
      break;
    case HAL_DAC_MSPDEINIT_CB_ID :
      hdac->MspDeInitCallback = HAL_DAC_MspDeInit;
      break;
    case HAL_DAC_ALL_CB_ID :
      hdac->ConvCpltCallbackCh1 = HAL_DAC_ConvCpltCallbackCh1;
      hdac->ConvHalfCpltCallbackCh1 = HAL_DAC_ConvHalfCpltCallbackCh1;
      hdac->ErrorCallbackCh1 = HAL_DAC_ErrorCallbackCh1;
      hdac->DMAUnderrunCallbackCh1 = HAL_DAC_DMAUnderrunCallbackCh1;
      hdac->ConvCpltCallbackCh2 = HAL_DACEx_ConvCpltCallbackCh2;
      hdac->ConvHalfCpltCallbackCh2 = HAL_DACEx_ConvHalfCpltCallbackCh2;
      hdac->ErrorCallbackCh2 = HAL_DACEx_ErrorCallbackCh2;
      hdac->DMAUnderrunCallbackCh2 = HAL_DACEx_DMAUnderrunCallbackCh2;
      hdac->MspInitCallback = HAL_DAC_MspInit;
      hdac->MspDeInitCallback = HAL_DAC_MspDeInit;
      break;
    default :
      /* Update the error code */
      hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
      /* update return status */
      status =  HAL_ERROR;
      break;
    }
  }
  else if (hdac->State == HAL_DAC_STATE_RESET)
  {
    switch (CallbackID)
    {
    case HAL_DAC_MSPINIT_CB_ID :
      hdac->MspInitCallback = HAL_DAC_MspInit;
      break;
    case HAL_DAC_MSPDEINIT_CB_ID :
      hdac->MspDeInitCallback = HAL_DAC_MspDeInit;
      break;
    default :
      /* Update the error code */
      hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
      /* update return status */
      status =  HAL_ERROR;
      break;
    }
  }
  else
  {
    /* Update the error code */
    hdac->ErrorCode |= HAL_DAC_ERROR_INVALID_CALLBACK;
    /* update return status */
    status =  HAL_ERROR;
  }

  /* Release Lock */
  __HAL_UNLOCK(hdac);
  return status;
}
#endif /* USE_HAL_DAC_REGISTER_CALLBACKS */

/**
  * @}
  */


/**
  * @}
  */


/**
  * @}
  */
#endif /* DAC1 */

#endif /* HAL_DAC_MODULE_ENABLED */

/**
  * @}
  */


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