aboutsummaryrefslogtreecommitdiff
path: root/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_sram.c
blob: cff0ced16d2cf5c12342ab3be5f580db4ad85ac6 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
/**
  ******************************************************************************
  * @file    stm32f4xx_hal_sram.c
  * @author  MCD Application Team
  * @version V1.3.2
  * @date    26-June-2015
  * @brief   SRAM HAL module driver.
  *          This file provides a generic firmware to drive SRAM memories  
  *          mounted as external device.
  *         
  @verbatim
  ==============================================================================
                          ##### How to use this driver #####
  ==============================================================================  
  [..]
    This driver is a generic layered driver which contains a set of APIs used to 
    control SRAM memories. It uses the FMC layer functions to interface 
    with SRAM devices.  
    The following sequence should be followed to configure the FMC/FSMC to interface
    with SRAM/PSRAM memories: 
      
   (#) Declare a SRAM_HandleTypeDef handle structure, for example:
          SRAM_HandleTypeDef  hsram; and: 
          
       (++) Fill the SRAM_HandleTypeDef handle "Init" field with the allowed 
            values of the structure member.
            
       (++) Fill the SRAM_HandleTypeDef handle "Instance" field with a predefined 
            base register instance for NOR or SRAM device 
                         
       (++) Fill the SRAM_HandleTypeDef handle "Extended" field with a predefined
            base register instance for NOR or SRAM extended mode 
             
   (#) Declare two FMC_NORSRAM_TimingTypeDef structures, for both normal and extended 
       mode timings; for example:
          FMC_NORSRAM_TimingTypeDef  Timing and FMC_NORSRAM_TimingTypeDef  ExTiming;
      and fill its fields with the allowed values of the structure member.
      
   (#) Initialize the SRAM Controller by calling the function HAL_SRAM_Init(). This function
       performs the following sequence:
          
       (##) MSP hardware layer configuration using the function HAL_SRAM_MspInit()
       (##) Control register configuration using the FMC NORSRAM interface function 
            FMC_NORSRAM_Init()
       (##) Timing register configuration using the FMC NORSRAM interface function 
            FMC_NORSRAM_Timing_Init()
       (##) Extended mode Timing register configuration using the FMC NORSRAM interface function 
            FMC_NORSRAM_Extended_Timing_Init()
       (##) Enable the SRAM device using the macro __FMC_NORSRAM_ENABLE()    

   (#) At this stage you can perform read/write accesses from/to the memory connected 
       to the NOR/SRAM Bank. You can perform either polling or DMA transfer using the
       following APIs:
       (++) HAL_SRAM_Read()/HAL_SRAM_Write() for polling read/write access
       (++) HAL_SRAM_Read_DMA()/HAL_SRAM_Write_DMA() for DMA read/write transfer
       
   (#) You can also control the SRAM device by calling the control APIs HAL_SRAM_WriteOperation_Enable()/
       HAL_SRAM_WriteOperation_Disable() to respectively enable/disable the SRAM write operation  
       
   (#) You can continuously monitor the SRAM device HAL state by calling the function
       HAL_SRAM_GetState()              
                             
  @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 SRAM SRAM
  * @brief SRAM driver modules
  * @{
  */
#ifdef HAL_SRAM_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 ---------------------------------------------------------*/
/* Private functions ---------------------------------------------------------*/

/* Exported functions --------------------------------------------------------*/
/** @defgroup SRAM_Exported_Functions SRAM Exported Functions
  * @{
  */
/** @defgroup SRAM_Exported_Functions_Group1 Initialization and de-initialization functions 
  * @brief    Initialization and Configuration functions 
  *
  @verbatim    
  ==============================================================================
           ##### SRAM Initialization and de_initialization functions #####
  ==============================================================================
    [..]  This section provides functions allowing to initialize/de-initialize
          the SRAM memory
  
@endverbatim
  * @{
  */

/**
  * @brief  Performs the SRAM device initialization sequence
  * @param  hsram: pointer to a SRAM_HandleTypeDef structure that contains
  *                the configuration information for SRAM module.
  * @param  Timing: Pointer to SRAM control timing structure 
  * @param  ExtTiming: Pointer to SRAM extended mode timing structure  
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SRAM_Init(SRAM_HandleTypeDef *hsram, FMC_NORSRAM_TimingTypeDef *Timing, FMC_NORSRAM_TimingTypeDef *ExtTiming)
{ 
  /* Check the SRAM handle parameter */
  if(hsram == NULL)
  {
     return HAL_ERROR;
  }
  
  if(hsram->State == HAL_SRAM_STATE_RESET)
  {  
    /* Allocate lock resource and initialize it */
    hsram->Lock = HAL_UNLOCKED;
    /* Initialize the low level hardware (MSP) */
    HAL_SRAM_MspInit(hsram);
  }
  
  /* Initialize SRAM control Interface */
  FMC_NORSRAM_Init(hsram->Instance, &(hsram->Init));

  /* Initialize SRAM timing Interface */
  FMC_NORSRAM_Timing_Init(hsram->Instance, Timing, hsram->Init.NSBank); 

  /* Initialize SRAM extended mode timing Interface */
  FMC_NORSRAM_Extended_Timing_Init(hsram->Extended, ExtTiming, hsram->Init.NSBank,  hsram->Init.ExtendedMode);  
  
  /* Enable the NORSRAM device */
  __FMC_NORSRAM_ENABLE(hsram->Instance, hsram->Init.NSBank); 
  
  return HAL_OK;
}

/**
  * @brief  Performs the SRAM device De-initialization sequence.
  * @param  hsram: pointer to a SRAM_HandleTypeDef structure that contains
  *                the configuration information for SRAM module.
  * @retval HAL status
  */
HAL_StatusTypeDef  HAL_SRAM_DeInit(SRAM_HandleTypeDef *hsram)
{ 
  /* De-Initialize the low level hardware (MSP) */
  HAL_SRAM_MspDeInit(hsram);
   
  /* Configure the SRAM registers with their reset values */
  FMC_NORSRAM_DeInit(hsram->Instance, hsram->Extended, hsram->Init.NSBank);

  hsram->State = HAL_SRAM_STATE_RESET;
  
  /* Release Lock */
  __HAL_UNLOCK(hsram);

  return HAL_OK;
}

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

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

/**
  * @brief  DMA transfer complete callback.
  * @param  hdma: pointer to a SRAM_HandleTypeDef structure that contains
  *                the configuration information for SRAM module.
  * @retval None
  */
__weak void HAL_SRAM_DMA_XferCpltCallback(DMA_HandleTypeDef *hdma)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_SRAM_DMA_XferCpltCallback could be implemented in the user file
   */ 
}

/**
  * @brief  DMA transfer complete error callback.
  * @param  hdma: pointer to a SRAM_HandleTypeDef structure that contains
  *                the configuration information for SRAM module.
  * @retval None
  */
__weak void HAL_SRAM_DMA_XferErrorCallback(DMA_HandleTypeDef *hdma)
{
  /* NOTE : This function Should not be modified, when the callback is needed,
            the HAL_SRAM_DMA_XferErrorCallback could be implemented in the user file
   */ 
}

/**
  * @}
  */

/** @defgroup SRAM_Exported_Functions_Group2 Input and Output functions 
  * @brief    Input Output and memory control functions 
  *
  @verbatim    
  ==============================================================================
                  ##### SRAM Input and Output functions #####
  ==============================================================================
  [..]  
    This section provides functions allowing to use and control the SRAM memory
  
@endverbatim
  * @{
  */

/**
  * @brief  Reads 8-bit buffer from SRAM memory. 
  * @param  hsram: pointer to a SRAM_HandleTypeDef structure that contains
  *                the configuration information for SRAM module.
  * @param  pAddress: Pointer to read start address
  * @param  pDstBuffer: Pointer to destination buffer  
  * @param  BufferSize: Size of the buffer to read from memory
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SRAM_Read_8b(SRAM_HandleTypeDef *hsram, uint32_t *pAddress, uint8_t *pDstBuffer, uint32_t BufferSize)
{
  __IO uint8_t * pSramAddress = (uint8_t *)pAddress;
  
  /* Process Locked */
  __HAL_LOCK(hsram);
  
  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_BUSY;  
  
  /* Read data from memory */
  for(; BufferSize != 0; BufferSize--)
  {
    *pDstBuffer = *(__IO uint8_t *)pSramAddress;
    pDstBuffer++;
    pSramAddress++;
  }
  
  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_READY;    

  /* Process unlocked */
  __HAL_UNLOCK(hsram); 
    
  return HAL_OK;   
}

/**
  * @brief  Writes 8-bit buffer to SRAM memory. 
  * @param  hsram: pointer to a SRAM_HandleTypeDef structure that contains
  *                the configuration information for SRAM module.
  * @param  pAddress: Pointer to write start address
  * @param  pSrcBuffer: Pointer to source buffer to write  
  * @param  BufferSize: Size of the buffer to write to memory
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SRAM_Write_8b(SRAM_HandleTypeDef *hsram, uint32_t *pAddress, uint8_t *pSrcBuffer, uint32_t BufferSize)
{
  __IO uint8_t * pSramAddress = (uint8_t *)pAddress;
  
  /* Check the SRAM controller state */
  if(hsram->State == HAL_SRAM_STATE_PROTECTED)
  {
    return  HAL_ERROR; 
  }
  
  /* Process Locked */
  __HAL_LOCK(hsram);
  
  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_BUSY; 

  /* Write data to memory */
  for(; BufferSize != 0; BufferSize--)
  {
    *(__IO uint8_t *)pSramAddress = *pSrcBuffer; 
    pSrcBuffer++;
    pSramAddress++;    
  }    

  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_READY; 
  
  /* Process unlocked */
  __HAL_UNLOCK(hsram);
    
  return HAL_OK;   
}

/**
  * @brief  Reads 16-bit buffer from SRAM memory. 
  * @param  hsram: pointer to a SRAM_HandleTypeDef structure that contains
  *                the configuration information for SRAM module.
  * @param  pAddress: Pointer to read start address
  * @param  pDstBuffer: Pointer to destination buffer  
  * @param  BufferSize: Size of the buffer to read from memory
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SRAM_Read_16b(SRAM_HandleTypeDef *hsram, uint32_t *pAddress, uint16_t *pDstBuffer, uint32_t BufferSize)
{
  __IO uint16_t * pSramAddress = (uint16_t *)pAddress;
  
  /* Process Locked */
  __HAL_LOCK(hsram);
  
  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_BUSY;  
  
  /* Read data from memory */
  for(; BufferSize != 0; BufferSize--)
  {
    *pDstBuffer = *(__IO uint16_t *)pSramAddress;
    pDstBuffer++;
    pSramAddress++;
  }
  
  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_READY;    

  /* Process unlocked */
  __HAL_UNLOCK(hsram); 
    
  return HAL_OK;  
}

/**
  * @brief  Writes 16-bit buffer to SRAM memory. 
  * @param  hsram: pointer to a SRAM_HandleTypeDef structure that contains
  *                the configuration information for SRAM module.
  * @param  pAddress: Pointer to write start address
  * @param  pSrcBuffer: Pointer to source buffer to write  
  * @param  BufferSize: Size of the buffer to write to memory
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SRAM_Write_16b(SRAM_HandleTypeDef *hsram, uint32_t *pAddress, uint16_t *pSrcBuffer, uint32_t BufferSize)
{
  __IO uint16_t * pSramAddress = (uint16_t *)pAddress; 
  
  /* Check the SRAM controller state */
  if(hsram->State == HAL_SRAM_STATE_PROTECTED)
  {
    return  HAL_ERROR; 
  }
  
  /* Process Locked */
  __HAL_LOCK(hsram);
  
  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_BUSY; 

  /* Write data to memory */
  for(; BufferSize != 0; BufferSize--)
  {
    *(__IO uint16_t *)pSramAddress = *pSrcBuffer; 
    pSrcBuffer++;
    pSramAddress++;    
  }    

  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_READY; 
  
  /* Process unlocked */
  __HAL_UNLOCK(hsram);
    
  return HAL_OK;  
}

/**
  * @brief  Reads 32-bit buffer from SRAM memory. 
  * @param  hsram: pointer to a SRAM_HandleTypeDef structure that contains
  *                the configuration information for SRAM module.
  * @param  pAddress: Pointer to read start address
  * @param  pDstBuffer: Pointer to destination buffer  
  * @param  BufferSize: Size of the buffer to read from memory
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SRAM_Read_32b(SRAM_HandleTypeDef *hsram, uint32_t *pAddress, uint32_t *pDstBuffer, uint32_t BufferSize)
{
  /* Process Locked */
  __HAL_LOCK(hsram);
  
  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_BUSY;  
  
  /* Read data from memory */
  for(; BufferSize != 0; BufferSize--)
  {
    *pDstBuffer = *(__IO uint32_t *)pAddress;
    pDstBuffer++;
    pAddress++;
  }
  
  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_READY;    

  /* Process unlocked */
  __HAL_UNLOCK(hsram); 
    
  return HAL_OK;  
}

/**
  * @brief  Writes 32-bit buffer to SRAM memory. 
  * @param  hsram: pointer to a SRAM_HandleTypeDef structure that contains
  *                the configuration information for SRAM module.
  * @param  pAddress: Pointer to write start address
  * @param  pSrcBuffer: Pointer to source buffer to write  
  * @param  BufferSize: Size of the buffer to write to memory
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SRAM_Write_32b(SRAM_HandleTypeDef *hsram, uint32_t *pAddress, uint32_t *pSrcBuffer, uint32_t BufferSize)
{
  /* Check the SRAM controller state */
  if(hsram->State == HAL_SRAM_STATE_PROTECTED)
  {
    return  HAL_ERROR; 
  }
  
  /* Process Locked */
  __HAL_LOCK(hsram);
  
  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_BUSY; 

  /* Write data to memory */
  for(; BufferSize != 0; BufferSize--)
  {
    *(__IO uint32_t *)pAddress = *pSrcBuffer; 
    pSrcBuffer++;
    pAddress++;    
  }    

  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_READY; 
  
  /* Process unlocked */
  __HAL_UNLOCK(hsram);
    
  return HAL_OK;   
}

/**
  * @brief  Reads a Words data from the SRAM memory using DMA transfer.
  * @param  hsram: pointer to a SRAM_HandleTypeDef structure that contains
  *                the configuration information for SRAM module.
  * @param  pAddress: Pointer to read start address
  * @param  pDstBuffer: Pointer to destination buffer  
  * @param  BufferSize: Size of the buffer to read from memory
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SRAM_Read_DMA(SRAM_HandleTypeDef *hsram, uint32_t *pAddress, uint32_t *pDstBuffer, uint32_t BufferSize)
{
  /* Process Locked */
  __HAL_LOCK(hsram);  
  
  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_BUSY;   
  
  /* Configure DMA user callbacks */
  hsram->hdma->XferCpltCallback  = HAL_SRAM_DMA_XferCpltCallback;
  hsram->hdma->XferErrorCallback = HAL_SRAM_DMA_XferErrorCallback;

  /* Enable the DMA Stream */
  HAL_DMA_Start_IT(hsram->hdma, (uint32_t)pAddress, (uint32_t)pDstBuffer, (uint32_t)BufferSize);
  
  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_READY; 
  
  /* Process unlocked */
  __HAL_UNLOCK(hsram);  
  
  return HAL_OK; 
}

/**
  * @brief  Writes a Words data buffer to SRAM memory using DMA transfer.
  * @param  hsram: pointer to a SRAM_HandleTypeDef structure that contains
  *                the configuration information for SRAM module.
  * @param  pAddress: Pointer to write start address
  * @param  pSrcBuffer: Pointer to source buffer to write  
  * @param  BufferSize: Size of the buffer to write to memory
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SRAM_Write_DMA(SRAM_HandleTypeDef *hsram, uint32_t *pAddress, uint32_t *pSrcBuffer, uint32_t BufferSize)
{
  /* Check the SRAM controller state */
  if(hsram->State == HAL_SRAM_STATE_PROTECTED)
  {
    return  HAL_ERROR; 
  }
  
  /* Process Locked */
  __HAL_LOCK(hsram);
  
  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_BUSY; 
  
  /* Configure DMA user callbacks */
  hsram->hdma->XferCpltCallback  = HAL_SRAM_DMA_XferCpltCallback;
  hsram->hdma->XferErrorCallback = HAL_SRAM_DMA_XferErrorCallback;

  /* Enable the DMA Stream */
  HAL_DMA_Start_IT(hsram->hdma, (uint32_t)pSrcBuffer, (uint32_t)pAddress, (uint32_t)BufferSize);
  
  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_READY;  
  
  /* Process unlocked */
  __HAL_UNLOCK(hsram);  
  
  return HAL_OK;
}

/**
  * @}
  */
  
/** @defgroup SRAM_Exported_Functions_Group3 Control functions 
 *  @brief   management functions 
 *
@verbatim   
  ==============================================================================
                        ##### SRAM Control functions #####
  ==============================================================================  
  [..]
    This subsection provides a set of functions allowing to control dynamically
    the SRAM interface.

@endverbatim
  * @{
  */
    
/**
  * @brief  Enables dynamically SRAM write operation.
  * @param  hsram: pointer to a SRAM_HandleTypeDef structure that contains
  *                the configuration information for SRAM module.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SRAM_WriteOperation_Enable(SRAM_HandleTypeDef *hsram)
{
  /* Process Locked */
  __HAL_LOCK(hsram);

  /* Enable write operation */
  FMC_NORSRAM_WriteOperation_Enable(hsram->Instance, hsram->Init.NSBank); 
  
  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_READY;
  
  /* Process unlocked */
  __HAL_UNLOCK(hsram); 
  
  return HAL_OK;  
}

/**
  * @brief  Disables dynamically SRAM write operation.
  * @param  hsram: pointer to a SRAM_HandleTypeDef structure that contains
  *                the configuration information for SRAM module.
  * @retval HAL status
  */
HAL_StatusTypeDef HAL_SRAM_WriteOperation_Disable(SRAM_HandleTypeDef *hsram)
{
  /* Process Locked */
  __HAL_LOCK(hsram);

  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_BUSY;
    
  /* Disable write operation */
  FMC_NORSRAM_WriteOperation_Disable(hsram->Instance, hsram->Init.NSBank); 
  
  /* Update the SRAM controller state */
  hsram->State = HAL_SRAM_STATE_PROTECTED;
  
  /* Process unlocked */
  __HAL_UNLOCK(hsram); 
  
  return HAL_OK;  
}

/**
  * @}
  */

/** @defgroup SRAM_Exported_Functions_Group4 State functions 
 *  @brief   Peripheral State functions 
 *
@verbatim   
  ==============================================================================
                      ##### SRAM State functions #####
  ==============================================================================  
  [..]
    This subsection permits to get in run-time the status of the SRAM controller 
    and the data flow.

@endverbatim
  * @{
  */
  
/**
  * @brief  Returns the SRAM controller state
  * @param  hsram: pointer to a SRAM_HandleTypeDef structure that contains
  *                the configuration information for SRAM module.
  * @retval HAL state
  */
HAL_SRAM_StateTypeDef HAL_SRAM_GetState(SRAM_HandleTypeDef *hsram)
{
  return hsram->State;
}
/**
  * @}
  */

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

/**
  * @}
  */

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