aboutsummaryrefslogblamecommitdiff
path: root/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_dac.c
blob: 552ca85b8e4b92d5fc65f528e873e4b5273dfd20 (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
























































































































































































































































































































































































































































































































































































































































































































































































































































































































































































                                                                                                                                    
/**
  ******************************************************************************
  * @file    stm32f4xx_hal_dac.c
  * @author  MCD Application Team
  * @version V1.3.2
  * @date    26-June-2015
  * @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 ***
      ====================
    [..]
    The device integrates two 12-bit Digital Analog Converters that 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_Pin9) using DAC_TRIGGER_EXT_IT9.
          The used pin (GPIOx_Pin9) must be configured in input mode.

      (#) Timers TRGO: TIM2, TIM4, TIM5, TIM6, TIM7 and TIM8
          (DAC_TRIGGER_T2_TRGO, DAC_TRIGGER_T4_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.

       *** 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 correspondence ***
       ================================================
       [..]
       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 Stream5 channel7 which must be
             already configured
         (#) DAC channel2 : mapped on DMA1 Stream6 channel7 which must be
             already configured

    -@- For Dual mode and specific signal (Triangle and noise) generation please
        refer to Extension Features Driver description


                      ##### 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 end of data transfer HAL_DAC_ConvCpltCallbackCh1()or HAL_DAC_ConvCpltCallbackCh2()
           function is executed and user can add his own code by customization of function pointer
           HAL_DAC_ConvCpltCallbackCh1 or HAL_DAC_ConvCpltCallbackCh2
       (+) 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
       (+) Stop the DAC peripheral using HAL_DAC_Stop_DMA()

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

#ifdef HAL_DAC_MODULE_ENABLED

#if defined(STM32F405xx) || defined(STM32F415xx) || defined(STM32F407xx) || defined(STM32F417xx) ||\
    defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) ||\
	  defined(STM32F446xx)
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/** @addtogroup DAC_Private_Functions
  * @{
  */
/* Private function prototypes -----------------------------------------------*/
static void DAC_DMAConvCpltCh1(DMA_HandleTypeDef *hdma);
static void DAC_DMAErrorCh1(DMA_HandleTypeDef *hdma);
static void DAC_DMAHalfConvCpltCh1(DMA_HandleTypeDef *hdma);
/**
  * @}
  */

/* 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  Initializes the DAC peripheral according to the specified parameters
  *         in the DAC_InitStruct.
  * @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)
  {
    /* Allocate lock resource and initialize it */
    hdac->Lock = HAL_UNLOCKED;
    /* Init the low level hardware */
    HAL_DAC_MspInit(hdac);
  }

  /* 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  Deinitializes 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;

  /* DeInit the low level hardware */
  HAL_DAC_MspDeInit(hdac);

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

/**
  * @brief  DeInitializes 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)
{
  /* 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.
      (+) Get result of conversion.

@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
  */
HAL_StatusTypeDef HAL_DAC_Start(DAC_HandleTypeDef* hdac, uint32_t Channel)
{
  uint32_t tmp1 = 0, tmp2 = 0;

  /* Check the parameters */
  assert_param(IS_DAC_CHANNEL(Channel));

  /* Process locked */
  __HAL_LOCK(hdac);

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

  /* Enable the Peripheral */
  __HAL_DAC_ENABLE(hdac, Channel);

  if(Channel == DAC_CHANNEL_1)
  {
    tmp1 = hdac->Instance->CR & DAC_CR_TEN1;
    tmp2 = hdac->Instance->CR & DAC_CR_TSEL1;
    /* Check if software trigger enabled */
    if((tmp1 ==  DAC_CR_TEN1) && (tmp2 ==  DAC_CR_TSEL1))
    {
      /* Enable the selected DAC software conversion */
      hdac->Instance->SWTRIGR |= (uint32_t)DAC_SWTRIGR_SWTRIG1;
    }
  }
  else
  {
    tmp1 = hdac->Instance->CR & DAC_CR_TEN2;
    tmp2 = hdac->Instance->CR & DAC_CR_TSEL2;
    /* Check if software trigger enabled */
    if((tmp1 == DAC_CR_TEN2) && (tmp2 == DAC_CR_TSEL2))
    {
      /* Enable the selected DAC software conversion*/
      hdac->Instance->SWTRIGR |= (uint32_t)DAC_SWTRIGR_SWTRIG2;
    }
  }

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

  /* Process unlocked */
  __HAL_UNLOCK(hdac);

  /* Return function status */
  return HAL_OK;
}

/**
  * @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
  */
HAL_StatusTypeDef HAL_DAC_Start_DMA(DAC_HandleTypeDef* hdac, uint32_t Channel, uint32_t* pData, uint32_t Length, uint32_t Alignment)
{
  uint32_t tmpreg = 0;

  /* Check the parameters */
  assert_param(IS_DAC_CHANNEL(Channel));
  assert_param(IS_DAC_ALIGN(Alignment));

  /* Process locked */
  __HAL_LOCK(hdac);

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

  if(Channel == DAC_CHANNEL_1)
  {
    /* Set the DMA transfer complete callback for channel1 */
    hdac->DMA_Handle1->XferCpltCallback = DAC_DMAConvCpltCh1;

    /* Set the DMA half transfer complete callback for channel1 */
    hdac->DMA_Handle1->XferHalfCpltCallback = DAC_DMAHalfConvCpltCh1;

    /* Set the DMA error callback for channel1 */
    hdac->DMA_Handle1->XferErrorCallback = DAC_DMAErrorCh1;

    /* Enable the selected DAC channel1 DMA request */
    hdac->Instance->CR |= DAC_CR_DMAEN1;

    /* Case of use of channel 1 */
    switch(Alignment)
    {
      case DAC_ALIGN_12B_R:
        /* Get DHR12R1 address */
        tmpreg = (uint32_t)&hdac->Instance->DHR12R1;
        break;
      case DAC_ALIGN_12B_L:
        /* Get DHR12L1 address */
        tmpreg = (uint32_t)&hdac->Instance->DHR12L1;
        break;
      case DAC_ALIGN_8B_R:
        /* Get DHR8R1 address */
        tmpreg = (uint32_t)&hdac->Instance->DHR8R1;
        break;
      default:
        break;
    }
  }
  else
  {
    /* Set the DMA transfer complete callback for channel2 */
    hdac->DMA_Handle2->XferCpltCallback = DAC_DMAConvCpltCh2;

    /* Set the DMA half transfer complete callback for channel2 */
    hdac->DMA_Handle2->XferHalfCpltCallback = DAC_DMAHalfConvCpltCh2;

    /* Set the DMA error callback for channel2 */
    hdac->DMA_Handle2->XferErrorCallback = DAC_DMAErrorCh2;

    /* Enable the selected DAC channel2 DMA request */
    hdac->Instance->CR |= DAC_CR_DMAEN2;

    /* Case of use of channel 2 */
    switch(Alignment)
    {
      case DAC_ALIGN_12B_R:
        /* Get DHR12R2 address */
        tmpreg = (uint32_t)&hdac->Instance->DHR12R2;
        break;
      case DAC_ALIGN_12B_L:
        /* Get DHR12L2 address */
        tmpreg = (uint32_t)&hdac->Instance->DHR12L2;
        break;
      case DAC_ALIGN_8B_R:
        /* Get DHR8R2 address */
        tmpreg = (uint32_t)&hdac->Instance->DHR8R2;
        break;
      default:
        break;
    }
  }

  /* Enable the DMA Stream */
  if(Channel == DAC_CHANNEL_1)
  {
    /* Enable the DAC DMA underrun interrupt */
    __HAL_DAC_ENABLE_IT(hdac, DAC_IT_DMAUDR1);

    /* Enable the DMA Stream */
    HAL_DMA_Start_IT(hdac->DMA_Handle1, (uint32_t)pData, tmpreg, Length);
  }
  else
  {
    /* Enable the DAC DMA underrun interrupt */
    __HAL_DAC_ENABLE_IT(hdac, DAC_IT_DMAUDR2);

    /* Enable the DMA Stream */
    HAL_DMA_Start_IT(hdac->DMA_Handle2, (uint32_t)pData, tmpreg, Length);
  }

  /* Enable the Peripheral */
  __HAL_DAC_ENABLE(hdac, Channel);

  /* Process Unlocked */
  __HAL_UNLOCK(hdac);

  /* Return function status */
  return HAL_OK;
}

/**
  * @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)
  {
    status = HAL_DMA_Abort(hdac->DMA_Handle1);
  }
  else /* Channel2 is used for */
  {
    status = HAL_DMA_Abort(hdac->DMA_Handle2);
  }

  /* 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  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.
  */
uint32_t HAL_DAC_GetValue(DAC_HandleTypeDef* hdac, uint32_t Channel)
{
  /* Check the parameters */
  assert_param(IS_DAC_CHANNEL(Channel));

  /* Returns the DAC channel data output register value */
  if(Channel == DAC_CHANNEL_1)
  {
    return hdac->Instance->DOR1;
  }
  else
  {
    return hdac->Instance->DOR2;
  }
}

/**
  * @brief  Handles DAC interrupt request
  * @param  hdac: pointer to a DAC_HandleTypeDef structure that contains
  *         the configuration information for the specified DAC.
  * @retval None
  */
void HAL_DAC_IRQHandler(DAC_HandleTypeDef* hdac)
{
  /* Check underrun channel 1 flag */
  if(__HAL_DAC_GET_FLAG(hdac, DAC_FLAG_DMAUDR1))
  {
    /* Change DAC state to error state */
    hdac->State = HAL_DAC_STATE_ERROR;

    /* Set DAC error code to channel1 DMA underrun error */
    hdac->ErrorCode |= HAL_DAC_ERROR_DMAUNDERRUNCH1;

    /* Clear the underrun flag */
    __HAL_DAC_CLEAR_FLAG(hdac,DAC_FLAG_DMAUDR1);

    /* Disable the selected DAC channel1 DMA request */
    hdac->Instance->CR &= ~DAC_CR_DMAEN1;

    /* Error callback */
    HAL_DAC_DMAUnderrunCallbackCh1(hdac);
  }
  /* Check underrun channel 2 flag */
  if(__HAL_DAC_GET_FLAG(hdac, DAC_FLAG_DMAUDR2))
  {
    /* Change DAC state to error state */
    hdac->State = HAL_DAC_STATE_ERROR;

    /* Set DAC error code to channel2 DMA underrun error */
    hdac->ErrorCode |= HAL_DAC_ERROR_DMAUNDERRUNCH2;

    /* Clear the underrun flag */
    __HAL_DAC_CLEAR_FLAG(hdac,DAC_FLAG_DMAUDR2);

    /* Disable the selected DAC channel1 DMA request */
    hdac->Instance->CR &= ~DAC_CR_DMAEN2;

    /* Error callback */
    HAL_DACEx_DMAUnderrunCallbackCh2(hdac);
  }
}

/**
  * @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)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_DAC_ConvCpltCallback 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)
{
  /* 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)
{
  /* 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)
{
  /* 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.
      (+) Set the specified data holding register value for DAC channel.

@endverbatim
  * @{
  */

/**
  * @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
  */
HAL_StatusTypeDef HAL_DAC_ConfigChannel(DAC_HandleTypeDef* hdac, DAC_ChannelConfTypeDef* sConfig, uint32_t Channel)
{
  uint32_t tmpreg1 = 0, tmpreg2 = 0;

  /* Check the DAC parameters */
  assert_param(IS_DAC_TRIGGER(sConfig->DAC_Trigger));
  assert_param(IS_DAC_OUTPUT_BUFFER_STATE(sConfig->DAC_OutputBuffer));
  assert_param(IS_DAC_CHANNEL(Channel));

  /* Process locked */
  __HAL_LOCK(hdac);

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

  /* Get the DAC CR value */
  tmpreg1 = hdac->Instance->CR;
  /* Clear BOFFx, TENx, TSELx, WAVEx and MAMPx bits */
  tmpreg1 &= ~(((uint32_t)(DAC_CR_MAMP1 | DAC_CR_WAVE1 | DAC_CR_TSEL1 | DAC_CR_TEN1 | DAC_CR_BOFF1)) << Channel);
  /* Configure for the selected DAC channel: buffer output, trigger */
  /* Set TSELx and TENx bits according to DAC_Trigger value */
  /* Set BOFFx bit according to DAC_OutputBuffer value */
  tmpreg2 = (sConfig->DAC_Trigger | sConfig->DAC_OutputBuffer);
  /* Calculate CR register value depending on DAC_Channel */
  tmpreg1 |= tmpreg2 << Channel;
  /* Write to DAC CR */
  hdac->Instance->CR = tmpreg1;
  /* Disable wave generation */
  hdac->Instance->CR &= ~(DAC_CR_WAVE1 << Channel);

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

  /* Process unlocked */
  __HAL_UNLOCK(hdac);

  /* Return function status */
  return HAL_OK;
}

/**
  * @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;
}

/**
  * @}
  */

/** @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 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 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;
}

/**
  * @}
  */

/**
  * @brief  DMA conversion complete callback.
  * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
  *                the configuration information for the specified DMA module.
  * @retval None
  */
static void DAC_DMAConvCpltCh1(DMA_HandleTypeDef *hdma)
{
  DAC_HandleTypeDef* hdac = ( DAC_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;

  HAL_DAC_ConvCpltCallbackCh1(hdac);

  hdac->State= HAL_DAC_STATE_READY;
}

/**
  * @brief  DMA half transfer complete callback.
  * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
  *                the configuration information for the specified DMA module.
  * @retval None
  */
static void DAC_DMAHalfConvCpltCh1(DMA_HandleTypeDef *hdma)
{
    DAC_HandleTypeDef* hdac = ( DAC_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
    /* Conversion complete callback */
    HAL_DAC_ConvHalfCpltCallbackCh1(hdac);
}

/**
  * @brief  DMA error callback
  * @param  hdma: pointer to a DMA_HandleTypeDef structure that contains
  *                the configuration information for the specified DMA module.
  * @retval None
  */
static void DAC_DMAErrorCh1(DMA_HandleTypeDef *hdma)
{
  DAC_HandleTypeDef* hdac = ( DAC_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;

  /* Set DAC error code to DMA error */
  hdac->ErrorCode |= HAL_DAC_ERROR_DMA;

  HAL_DAC_ErrorCallbackCh1(hdac);

  hdac->State= HAL_DAC_STATE_READY;
}

/**
  * @}
  */
#endif /* STM32F405xx || STM32F415xx || STM32F407xx || STM32F417xx ||\
          STM32F427xx || STM32F437xx || STM32F429xx || STM32F439xx ||\
          STM32F446xx
        */
#endif /* HAL_DAC_MODULE_ENABLED */

/**
  * @}
  */

/**
  * @}
  */

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