Select one of the symbols to view example projects that use it.
Outline ![]()
Files ![]()
loading...
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
/**
******************************************************************************
* @file Examples_LL/USART/USART_SyncCommunication_FullDuplex_DMA/Src/main.c
* @author MCD Application Team
* @brief This example describes how to transfer bytes from/to an USART peripheral
* to/from an SPI peripheral (in slave mode) using DMA mode
* through the STM32F4xx USART LL API.
* Peripheral initialization done using LL unitary services functions.
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/** @addtogroup STM32F4xx_LL_Examples
* @{
*/
/** @addtogroup USART_SyncCommunication_FullDuplex_DMA
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
__IO uint8_t ubButtonPress = 0;
/* Buffer used for transmission */
uint8_t aUSART1TxBuffer[] = "**** USART_SyncCommunication_FullDuplex_DMA USART1 to SPI1 communication ****";
uint8_t ubUSART1NbDataToTransmit = sizeof(aUSART1TxBuffer);
__IO uint8_t ubUSART1TransmissionComplete = 0;
uint8_t aSPI1TxBuffer[] = "**** USART_SyncCommunication_FullDuplex_DMA SPI1 to USART1 communication ****";
uint8_t ubSPI1NbDataToTransmit = sizeof(aSPI1TxBuffer);
__IO uint8_t ubSPI1TransmissionComplete = 0;
/* Buffer used for reception */
uint8_t aUSART1RxBuffer[sizeof(aSPI1TxBuffer)];
uint8_t ubUSART1NbDataToReceive = sizeof(aSPI1TxBuffer);
__IO uint8_t ubUSART1ReceptionComplete = 0;
uint8_t aSPI1RxBuffer[sizeof(aUSART1TxBuffer)];
uint8_t ubSPI1NbDataToReceive = sizeof(aUSART1TxBuffer);
__IO uint8_t ubSPI1ReceptionComplete = 0;
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
void Configure_USART1_DMA(void);
void Configure_SPI1_DMA(void);
void Configure_USART1(void);
void Configure_SPI1(void);
void Activate_SPI1(void);
void StartTransfers(void);
void LED_Init(void);
void LED_On(void);
void LED_Blinking(uint32_t Period);
void LED_Off(void);
void UserButton_Init(void);
void WaitForUserButtonPress(void);
void WaitAndCheckEndOfTransfer(void);
uint8_t Buffercmp8(uint8_t* pBuffer1, uint8_t* pBuffer2, uint8_t BufferLength);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program
* @param None
* @retval None
*/
int main(void)
{
/* Configure the system clock to 100 MHz */
SystemClock_Config();
/* Initialize LED2 */
LED_Init();
/* Configure the USART1 parameters */
Configure_USART1();
/* Configure the SPI1 parameters */
Configure_SPI1();
/* Configure DMA channels for the USART1 */
Configure_USART1_DMA();
/* Configure DMA channels for the SPI1 */
Configure_SPI1_DMA();
/* Initialize User push-button in EXTI mode */
UserButton_Init();
/* Enable the SPI1 peripheral */
Activate_SPI1();
/* Wait for User push-button press to start transfer */
WaitForUserButtonPress();
/* Initiate DMA transfers */
StartTransfers();
/* Wait for the end of the transfer and check received data */
WaitAndCheckEndOfTransfer();
/* Infinite loop */
while (1)
{
}
}
/**
* @brief This function configures the DMA Channels for USART1
* @note This function is used to :
* -1- Enable DMA2 clock
* -2- Configure NVIC for DMA2 transfer complete/error interrupts
* -3- Configure the DMA2_Stream7 functional parameters for Tx
* -4- Configure the DMA2_Stream5 functional parameters for Rx
* -5- Enable DMA2_Stream7 and DMA2_Stream5 DMA transfer complete/error interrupts
* @param None
* @retval None
*/
void Configure_USART1_DMA(void)
{
/* DMA2 used for USART1 Transmission and Reception
*/
/* (1) Enable the clock of DMA2 */
LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_DMA2);
/* (2) Configure NVIC for DMA transfer complete/error interrupts */
NVIC_SetPriority(DMA2_Stream7_IRQn, 3);
NVIC_EnableIRQ(DMA2_Stream7_IRQn);
NVIC_SetPriority(DMA2_Stream5_IRQn, 2);
NVIC_EnableIRQ(DMA2_Stream5_IRQn);
/* (3) Configure the DMA2 functional parameters for transmission */
LL_DMA_SetChannelSelection(DMA2, LL_DMA_STREAM_7, LL_DMA_CHANNEL_4);
LL_DMA_ConfigTransfer(DMA2, LL_DMA_STREAM_7,
LL_DMA_DIRECTION_MEMORY_TO_PERIPH |
LL_DMA_PRIORITY_HIGH |
LL_DMA_MODE_NORMAL |
LL_DMA_PERIPH_NOINCREMENT |
LL_DMA_MEMORY_INCREMENT |
LL_DMA_PDATAALIGN_BYTE |
LL_DMA_MDATAALIGN_BYTE);
LL_DMA_ConfigAddresses(DMA2, LL_DMA_STREAM_7,
(uint32_t)aUSART1TxBuffer,
LL_USART_DMA_GetRegAddr(USART1),
LL_DMA_GetDataTransferDirection(DMA2, LL_DMA_STREAM_7));
LL_DMA_SetDataLength(DMA2, LL_DMA_STREAM_7, ubUSART1NbDataToTransmit);
/* (4) Configure the DMA functional parameters for reception */
LL_DMA_SetChannelSelection(DMA2, LL_DMA_STREAM_5, LL_DMA_CHANNEL_4);
LL_DMA_ConfigTransfer(DMA2, LL_DMA_STREAM_5,
LL_DMA_DIRECTION_PERIPH_TO_MEMORY |
LL_DMA_PRIORITY_HIGH |
LL_DMA_MODE_NORMAL |
LL_DMA_PERIPH_NOINCREMENT |
LL_DMA_MEMORY_INCREMENT |
LL_DMA_PDATAALIGN_BYTE |
LL_DMA_MDATAALIGN_BYTE);
LL_DMA_ConfigAddresses(DMA2, LL_DMA_STREAM_5,
LL_USART_DMA_GetRegAddr(USART1),
(uint32_t)aUSART1RxBuffer,
LL_DMA_GetDataTransferDirection(DMA2, LL_DMA_STREAM_5));
LL_DMA_SetDataLength(DMA2, LL_DMA_STREAM_5, ubUSART1NbDataToReceive);
/* (5) Enable DMA transfer complete/error interrupts */
LL_DMA_EnableIT_TC(DMA2, LL_DMA_STREAM_7);
LL_DMA_EnableIT_TE(DMA2, LL_DMA_STREAM_7);
LL_DMA_EnableIT_TC(DMA2, LL_DMA_STREAM_5);
LL_DMA_EnableIT_TE(DMA2, LL_DMA_STREAM_5);
}
/**
* @brief This function configures the DMA Channels for SPI1
* @note This function is used to :
* -1- Enable DMA2 clock
* -2- Configure NVIC for DMA2 transfer complete/error interrupts
* -3- Configure the DMA2_Stream3 functional parameters for Tx
* -4- Configure the DMA2_Stream2 functional parameters for Rx
* -5- Enable DMA2_Stream3 and DMA2_Stream2 DMA transfer complete/error interrupts
* @param None
* @retval None
*/
void Configure_SPI1_DMA(void)
{
/* DMA2 used for SPI1 Transmission and Reception
*/
/* (1) Enable the clock of DMA2 */
LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_DMA2);
/* (2) Configure NVIC for DMA transfer complete/error interrupts */
NVIC_SetPriority(DMA2_Stream3_IRQn, 1);
NVIC_EnableIRQ(DMA2_Stream3_IRQn);
NVIC_SetPriority(DMA2_Stream2_IRQn, 0);
NVIC_EnableIRQ(DMA2_Stream2_IRQn);
/* (3) Configure the DMA2 functional parameters for transmission */
LL_DMA_SetChannelSelection(DMA2, LL_DMA_STREAM_3, LL_DMA_CHANNEL_3);
LL_DMA_ConfigTransfer(DMA2, LL_DMA_STREAM_3,
LL_DMA_DIRECTION_MEMORY_TO_PERIPH |
LL_DMA_PRIORITY_HIGH |
LL_DMA_MODE_NORMAL |
LL_DMA_PERIPH_NOINCREMENT |
LL_DMA_MEMORY_INCREMENT |
LL_DMA_PDATAALIGN_BYTE |
LL_DMA_MDATAALIGN_BYTE);
LL_DMA_ConfigAddresses(DMA2, LL_DMA_STREAM_3,
(uint32_t)aSPI1TxBuffer,
(uint32_t)&(SPI1->DR),
LL_DMA_GetDataTransferDirection(DMA2, LL_DMA_STREAM_3));
LL_DMA_SetDataLength(DMA2, LL_DMA_STREAM_3, ubSPI1NbDataToTransmit);
/* (4) Configure the DMA functional parameters for reception */
LL_DMA_SetChannelSelection(DMA2, LL_DMA_STREAM_2, LL_DMA_CHANNEL_3);
LL_DMA_ConfigTransfer(DMA2, LL_DMA_STREAM_2,
LL_DMA_DIRECTION_PERIPH_TO_MEMORY |
LL_DMA_PRIORITY_HIGH |
LL_DMA_MODE_NORMAL |
LL_DMA_PERIPH_NOINCREMENT |
LL_DMA_MEMORY_INCREMENT |
LL_DMA_PDATAALIGN_BYTE |
LL_DMA_MDATAALIGN_BYTE);
LL_DMA_ConfigAddresses(DMA2, LL_DMA_STREAM_2,
(uint32_t)&(SPI1->DR),
(uint32_t)aSPI1RxBuffer,
LL_DMA_GetDataTransferDirection(DMA2, LL_DMA_STREAM_2));
LL_DMA_SetDataLength(DMA2, LL_DMA_STREAM_2, ubSPI1NbDataToReceive);
/* (5) Enable DMA transfer complete/error interrupts */
LL_DMA_EnableIT_TC(DMA2, LL_DMA_STREAM_3);
LL_DMA_EnableIT_TE(DMA2, LL_DMA_STREAM_3);
LL_DMA_EnableIT_TC(DMA2, LL_DMA_STREAM_2);
LL_DMA_EnableIT_TE(DMA2, LL_DMA_STREAM_2);
}
/**
* @brief This function configures USART1.
* @note This function is used to :
* -1- Enable GPIO clock and configures the USART1 pins.
* -2- Enable the USART1 peripheral clock and clock source.
* -3- Configure USART1 functional parameters.
* -4- Enable USART1.
* @note Peripheral configuration is minimal configuration from reset values.
* Thus, some useless LL unitary functions calls below are provided as
* commented examples - setting is default configuration from reset.
* @param None
* @retval None
*/
void Configure_USART1(void)
{
/* (1) Enable GPIO clock and configures the USART1 pins ********************/
/* Enable the peripheral clock of GPIOA */
LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_GPIOA);
/* Configure SCK Pin connected to pin 23 of CN10 connector */
LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_8, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetAFPin_8_15(GPIOA, LL_GPIO_PIN_8, LL_GPIO_AF_7);
LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_8, LL_GPIO_SPEED_FREQ_HIGH);
LL_GPIO_SetPinOutputType(GPIOA, LL_GPIO_PIN_8, LL_GPIO_OUTPUT_PUSHPULL);
LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_8, LL_GPIO_PULL_DOWN);
/* Configure TX Pin connected to pin 21 of CN10 connector */
LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_9, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetAFPin_8_15(GPIOA, LL_GPIO_PIN_9, LL_GPIO_AF_7);
LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_9, LL_GPIO_SPEED_FREQ_HIGH);
LL_GPIO_SetPinOutputType(GPIOA, LL_GPIO_PIN_9, LL_GPIO_OUTPUT_PUSHPULL);
LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_9, LL_GPIO_PULL_DOWN);
/* Configure RX Pin connected to pin 33 of CN10 connector */
LL_GPIO_SetPinMode(GPIOA, LL_GPIO_PIN_10, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetAFPin_8_15(GPIOA, LL_GPIO_PIN_10, LL_GPIO_AF_7);
LL_GPIO_SetPinSpeed(GPIOA, LL_GPIO_PIN_10, LL_GPIO_SPEED_FREQ_HIGH);
LL_GPIO_SetPinOutputType(GPIOA, LL_GPIO_PIN_10, LL_GPIO_OUTPUT_PUSHPULL);
LL_GPIO_SetPinPull(GPIOA, LL_GPIO_PIN_10, LL_GPIO_PULL_DOWN);
/* (2) Enable the USART1 peripheral clock and clock source ****************/
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_USART1);
/* (3) Configure USART1 functional parameters ********************************/
/* Disable USART prior modifying configuration registers */
/* Note: Commented as corresponding to Reset value */
// LL_USART_Disable(USART1);
/* TX/RX direction */
LL_USART_SetTransferDirection(USART1, LL_USART_DIRECTION_TX_RX);
/* 8 data bit, 1 start bit, 1 stop bit, no parity */
LL_USART_ConfigCharacter(USART1, LL_USART_DATAWIDTH_8B, LL_USART_PARITY_NONE, LL_USART_STOPBITS_1);
/* Clock configuration : Phase 2 edges, Polarity Low, Last Bit Clock output enabled */
LL_USART_ConfigClock(USART1, LL_USART_PHASE_2EDGE, LL_USART_POLARITY_LOW, LL_USART_LASTCLKPULSE_OUTPUT);
/* Oversampling by 8 : To be forced to 8 in USART mode */
LL_USART_SetOverSampling(USART1, LL_USART_OVERSAMPLING_8);
/* Set Baudrate to 115200 using APB frequency set to 10000000 Hz */
/* Frequency available for USART peripheral can also be calculated through LL RCC macro */
/* Ex :
Periphclk = LL_RCC_GetUSARTClockFreq(Instance);
In this example, Peripheral Clock is expected to be equal to 10000000 Hz => equal to SystemCoreClock
*/
LL_USART_SetBaudRate(USART1, SystemCoreClock, LL_USART_OVERSAMPLING_8, 115200);
/* Configure peripheral in USART mode for synchronous communication (CLK signal delivered by USRAT peripheral)
* Call of this function is equivalent to following function call sequence :
* - Clear LINEN in CR2 using LL_USART_DisableLIN() function
* - Clear IREN in CR3 using LL_USART_DisableSmartcard() function
* - Clear SCEN in CR3 using LL_USART_DisableSmartcard() function
* - Clear HDSEL in CR3 using LL_USART_DisableHalfDuplex() function
* - Set CLKEN in CR2 using LL_USART_EnableSCLKOutput() function
*/
LL_USART_ConfigSyncMode(USART1);
/* (4) Enable USART1 **********************************************************/
LL_USART_Enable(USART1);
}
/**
* @brief This function configures SPI1.
* @note This function is used to :
* -1- Enable GPIO clock and configures the SPI1 pins.
* -2- Enable the SPI1 peripheral clock and clock source.
* -3- Configure SPI1 functional parameters.
* @param None
* @retval None
*/
void Configure_SPI1(void)
{
/* (1) Enable GPIO clock and configures the SPI1 pins ********************/
/* Enable the peripheral clock of GPIOB */
LL_AHB1_GRP1_EnableClock(LL_AHB1_GRP1_PERIPH_GPIOB);
/* Configure SCK Pin connected to pin 31 of CN10 connector */
LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_3, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetAFPin_0_7(GPIOB, LL_GPIO_PIN_3, LL_GPIO_AF_5);
LL_GPIO_SetPinSpeed(GPIOB, LL_GPIO_PIN_3, LL_GPIO_SPEED_FREQ_HIGH);
LL_GPIO_SetPinOutputType(GPIOB, LL_GPIO_PIN_3, LL_GPIO_OUTPUT_PUSHPULL);
LL_GPIO_SetPinPull(GPIOB, LL_GPIO_PIN_3, LL_GPIO_PULL_DOWN);
/* Configure MISO Pin connected to pin 27 of CN10 connector */
LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_4, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetAFPin_0_7(GPIOB, LL_GPIO_PIN_4, LL_GPIO_AF_5);
LL_GPIO_SetPinSpeed(GPIOB, LL_GPIO_PIN_4, LL_GPIO_SPEED_FREQ_HIGH);
LL_GPIO_SetPinOutputType(GPIOB, LL_GPIO_PIN_4, LL_GPIO_OUTPUT_PUSHPULL);
LL_GPIO_SetPinPull(GPIOB, LL_GPIO_PIN_4, LL_GPIO_PULL_DOWN);
/* Configure MOSI Pin connected to pin 29 of CN10 connector */
LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_5, LL_GPIO_MODE_ALTERNATE);
LL_GPIO_SetAFPin_0_7(GPIOB, LL_GPIO_PIN_5, LL_GPIO_AF_5);
LL_GPIO_SetPinSpeed(GPIOB, LL_GPIO_PIN_5, LL_GPIO_SPEED_FREQ_HIGH);
LL_GPIO_SetPinOutputType(GPIOB, LL_GPIO_PIN_5, LL_GPIO_OUTPUT_PUSHPULL);
LL_GPIO_SetPinPull(GPIOB, LL_GPIO_PIN_5, LL_GPIO_PULL_DOWN);
/* (2) Enable the SPI1 peripheral clock and clock source ****************/
LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_SPI1);
/* (3) Configure SPI1 functional parameters ********************************/
LL_SPI_SetBaudRatePrescaler(SPI1, LL_SPI_BAUDRATEPRESCALER_DIV256);
LL_SPI_SetTransferDirection(SPI1,LL_SPI_FULL_DUPLEX);
LL_SPI_SetClockPhase(SPI1, LL_SPI_PHASE_2EDGE);
LL_SPI_SetClockPolarity(SPI1, LL_SPI_POLARITY_LOW);
LL_SPI_SetTransferBitOrder(SPI1, LL_SPI_LSB_FIRST);
LL_SPI_SetDataWidth(SPI1, LL_SPI_DATAWIDTH_8BIT);
LL_SPI_SetNSSMode(SPI1, LL_SPI_NSS_SOFT);
LL_SPI_SetMode(SPI1, LL_SPI_MODE_SLAVE);
/* Configure SPI1 DMA transfer interrupts */
/* Enable DMA TX Interrupt */
LL_SPI_EnableDMAReq_TX(SPI1);
/* Enable DMA RX Interrupt */
LL_SPI_EnableDMAReq_RX(SPI1);
}
/**
* @brief This function Activate SPI1
* @param None
* @retval None
*/
void Activate_SPI1(void)
{
/* Enable SPI1 */
LL_SPI_Enable(SPI1);
/* Enable DMA Channels Tx and Rx */
LL_DMA_EnableStream(DMA2, LL_DMA_STREAM_3);
LL_DMA_EnableStream(DMA2, LL_DMA_STREAM_2);
}
/**
* @brief This function initiates TX and RX DMA transfers by enabling DMA channels
* @param None
* @retval None
*/
void StartTransfers(void)
{
/* Enable DMA RX Interrupt */
LL_USART_EnableDMAReq_RX(USART1);
/* Enable DMA TX Interrupt */
LL_USART_EnableDMAReq_TX(USART1);
/* Enable DMA Channel Rx */
LL_DMA_EnableStream(DMA2, LL_DMA_STREAM_5);
/* Enable DMA Channel Tx */
LL_DMA_EnableStream(DMA2, LL_DMA_STREAM_7);
}
/**
* @brief Initialize LED2.
* @param None
* @retval None
*/
void LED_Init(void)
{
/* Enable the LED2 Clock */
LED2_GPIO_CLK_ENABLE();
/* Configure IO in output push-pull mode to drive external LED2 */
LL_GPIO_SetPinMode(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_MODE_OUTPUT);
/* Reset value is LL_GPIO_OUTPUT_PUSHPULL */
//LL_GPIO_SetPinOutputType(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_OUTPUT_PUSHPULL);
/* Reset value is LL_GPIO_SPEED_FREQ_LOW */
//LL_GPIO_SetPinSpeed(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_SPEED_FREQ_LOW);
/* Reset value is LL_GPIO_PULL_NO */
//LL_GPIO_SetPinPull(LED2_GPIO_PORT, LED2_PIN, LL_GPIO_PULL_NO);
}
/**
* @brief Turn-on LED2.
* @param None
* @retval None
*/
void LED_On(void)
{
/* Turn LED2 on */
LL_GPIO_SetOutputPin(LED2_GPIO_PORT, LED2_PIN);
}
/**
* @brief Turn-off LED2.
* @param None
* @retval None
*/
void LED_Off(void)
{
/* Turn LED2 off */
LL_GPIO_ResetOutputPin(LED2_GPIO_PORT, LED2_PIN);
}
/**
* @brief Set LED2 to Blinking mode for an infinite loop (toggle period based on value provided as input parameter).
* @param Period : Period of time (in ms) between each toggling of LED
* This parameter can be user defined values. Pre-defined values used in that example are :
* @arg LED_BLINK_FAST : Fast Blinking
* @arg LED_BLINK_SLOW : Slow Blinking
* @arg LED_BLINK_ERROR : Error specific Blinking
* @retval None
*/
void LED_Blinking(uint32_t Period)
{
/* Toggle LED2 in an infinite loop */
while (1)
{
LL_GPIO_TogglePin(LED2_GPIO_PORT, LED2_PIN);
LL_mDelay(Period);
}
}
/**
* @brief Configures User push-button in GPIO or EXTI Line Mode.
* @param None
* @retval None
*/
void UserButton_Init(void)
{
/* Enable the BUTTON Clock */
USER_BUTTON_GPIO_CLK_ENABLE();
/* Configure GPIO for BUTTON */
LL_GPIO_SetPinMode(USER_BUTTON_GPIO_PORT, USER_BUTTON_PIN, LL_GPIO_MODE_INPUT);
LL_GPIO_SetPinPull(USER_BUTTON_GPIO_PORT, USER_BUTTON_PIN, LL_GPIO_PULL_NO);
/* Connect External Line to the GPIO*/
USER_BUTTON_SYSCFG_SET_EXTI();
/* Enable a rising trigger EXTI13 Interrupt */
USER_BUTTON_EXTI_LINE_ENABLE();
USER_BUTTON_EXTI_FALLING_TRIG_ENABLE();
/* Configure NVIC for USER_BUTTON_EXTI_IRQn */
NVIC_SetPriority(USER_BUTTON_EXTI_IRQn, 3);
NVIC_EnableIRQ(USER_BUTTON_EXTI_IRQn);
}
/**
* @brief Wait for User push-button press to start transfer.
* @param None
* @retval None
*/
/* */
void WaitForUserButtonPress(void)
{
while (ubButtonPress == 0)
{
LL_GPIO_TogglePin(LED2_GPIO_PORT, LED2_PIN);
LL_mDelay(LED_BLINK_FAST);
}
/* Ensure that LED2 is turned Off */
LED_Off();
}
/**
* @brief Wait end of transfer and check if received Data are well.
* @param None
* @retval None
*/
void WaitAndCheckEndOfTransfer(void)
{
/* 1 - Wait end of transmission from USART1 */
while (ubUSART1TransmissionComplete != 1)
{
}
/* Disable DMA2 Tx Channel */
LL_DMA_DisableStream(DMA2, LL_DMA_STREAM_7);
/* 2 - Wait end of transmission from SPI1 */
while (ubSPI1TransmissionComplete != 1)
{
}
/* Disable DMA2 Tx Channel */
LL_DMA_DisableStream(DMA2, LL_DMA_STREAM_3);
/* 3 - Wait end of reception from USART1 */
while (ubUSART1ReceptionComplete != 1)
{
}
/* Disable DMA2 Rx Channel */
LL_DMA_DisableStream(DMA2, LL_DMA_STREAM_5);
/* 4 - Wait end of reception from SPI1 */
while (ubSPI1ReceptionComplete != 1)
{
}
/* Disable DMA2 Rx Channel */
LL_DMA_DisableStream(DMA2, LL_DMA_STREAM_2);
/* 5 - Compare received data to transmitted one (USART1 => SPI1) */
if(Buffercmp8((uint8_t*)aUSART1TxBuffer, (uint8_t*)aSPI1RxBuffer, ubUSART1NbDataToTransmit))
{
/* Processing Error */
LED_Blinking(LED_BLINK_ERROR);
}
/* 6 - Compare received data to transmitted one (SPI1 => USART1) */
else if(Buffercmp8((uint8_t*)aSPI1TxBuffer, (uint8_t*)aUSART1RxBuffer, ubSPI1NbDataToTransmit))
{
/* Processing Error */
LED_Blinking(LED_BLINK_ERROR);
}
else
{
/* Turn On Led if data are well received */
LED_On();
}
}
/**
* @brief Compares two 8-bit buffers and returns the comparison result.
* @param pBuffer1: pointer to the source buffer to be compared to.
* @param pBuffer2: pointer to the second source buffer to be compared to the first.
* @param BufferLength: buffer's length.
* @retval 0: Comparison is OK (the two Buffers are identical)
* Value different from 0: Comparison is NOK (Buffers are different)
*/
uint8_t Buffercmp8(uint8_t* pBuffer1, uint8_t* pBuffer2, uint8_t BufferLength)
{
while (BufferLength--)
{
if (*pBuffer1 != *pBuffer2)
{
return 1;
}
pBuffer1++;
pBuffer2++;
}
return 0;
}
/**
* @brief System Clock Configuration
* The system Clock is configured as follow :
* System Clock source = PLL (HSE)
* SYSCLK(Hz) = 100000000
* HCLK(Hz) = 100000000
* AHB Prescaler = 1
* APB1 Prescaler = 2
* APB2 Prescaler = 1
* HSE Frequency(Hz) = 8000000
* PLL_M = 8
* PLL_N = 400
* PLL_P = 4
* VDD(V) = 3.3
* Main regulator output voltage = Scale1 mode
* Flash Latency(WS) = 3
* @param None
* @retval None
*/
void SystemClock_Config(void)
{
/* Enable HSE oscillator */
LL_RCC_HSE_EnableBypass();
LL_RCC_HSE_Enable();
while(LL_RCC_HSE_IsReady() != 1)
{
};
/* Set FLASH latency */
LL_FLASH_SetLatency(LL_FLASH_LATENCY_3);
/* Main PLL configuration and activation */
LL_RCC_PLL_ConfigDomain_SYS(LL_RCC_PLLSOURCE_HSE, LL_RCC_PLLM_DIV_8, 400, LL_RCC_PLLP_DIV_4);
LL_RCC_PLL_Enable();
while(LL_RCC_PLL_IsReady() != 1)
{
};
/* Sysclk activation on the main PLL */
LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_PLL);
while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_PLL)
{
};
/* Set APB1 & APB2 prescaler */
LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_2);
LL_RCC_SetAPB2Prescaler(LL_RCC_APB2_DIV_1);
/* Set systick to 1ms */
SysTick_Config(100000000 / 1000);
/* Update CMSIS variable (which can be updated also through SystemCoreClockUpdate function) */
SystemCoreClock = 100000000;
}
/******************************************************************************/
/* USER IRQ HANDLER TREATMENT Functions */
/******************************************************************************/
/**
* @brief Function to manage User push-button
* @param None
* @retval None
*/
void UserButton_Callback(void)
{
/* Update User push-button variable : to be checked in waiting loop in main program */
ubButtonPress = 1;
}
/**
* @brief Function called from DMA2 IRQ Handler when Tx transfer is completed (USART1)
* @param None
* @retval None
*/
void USART1_DMA2_TransmitComplete_Callback(void)
{
/* DMA Tx transfer completed */
ubUSART1TransmissionComplete = 1;
}
/**
* @brief Function called from DMA2 IRQ Handler when Tx transfer is completed (SPI1)
* @param None
* @retval None
*/
void SPI1_DMA2_TransmitComplete_Callback(void)
{
/* DMA Tx transfer completed */
ubSPI1TransmissionComplete = 1;
}
/**
* @brief Function called from DMA2 IRQ Handler when Rx transfer is completed (USART1)
* @param None
* @retval None
*/
void USART1_DMA2_ReceiveComplete_Callback(void)
{
/* DMA Rx transfer completed */
ubUSART1ReceptionComplete = 1;
}
/**
* @brief Function called from DMA2 IRQ Handler when Rx transfer is completed (SPI1)
* @param None
* @retval None
*/
void SPI1_DMA2_ReceiveComplete_Callback(void)
{
/* DMA Rx transfer completed */
ubSPI1ReceptionComplete = 1;
}
/**
* @brief Function called in case of error detected in USART IT Handler
* @param None
* @retval None
*/
void USART_TransferError_Callback(void)
{
/* Disable DMA2 Tx Channel */
LL_DMA_DisableStream(DMA2, LL_DMA_STREAM_7);
/* Disable DMA2 Rx Channel */
LL_DMA_DisableStream(DMA2, LL_DMA_STREAM_5);
/* Set LED2 to Blinking mode to indicate error occurs */
LED_Blinking(LED_BLINK_ERROR);
}
/**
* @brief Function called in case of error detected in SPI IT Handler
* @param None
* @retval None
*/
void SPI_TransferError_Callback(void)
{
/* Disable DMA2 Tx Channel */
LL_DMA_DisableStream(DMA2, LL_DMA_STREAM_3);
/* Disable DMA2 Rx Channel */
LL_DMA_DisableStream(DMA2, LL_DMA_STREAM_2);
/* Set LED2 to Blinking mode to indicate error occurs */
LED_Blinking(LED_BLINK_ERROR);
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/**
* @}
*/
/**
* @}
*/