|
|
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
|
/**
******************************************************************************
* @file stm32f10x_i2c.h
* @author MCD Application Team
* @version V3.5.0
* @date 11-March-2011
* @brief This file contains all the functions prototypes for the I2C firmware
* library.
******************************************************************************
* @attention
*
* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
*
* <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2>
******************************************************************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __STM32F10x_I2C_H
#define __STM32F10x_I2C_H
#ifdef __cplusplus
extern "C" {
#endif
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
/** @addtogroup STM32F10x_StdPeriph_Driver
* @{
*/
/** @addtogroup I2C
* @{
*/
/** @defgroup I2C_Exported_Types
* @{
*/
/**
* @brief I2C Init structure definition
*/
typedef struct
{
uint32_t I2C_ClockSpeed; /*!< Specifies the clock frequency.
This parameter must be set to a value lower than 400kHz */
uint16_t I2C_Mode; /*!< Specifies the I2C mode.
This parameter can be a value of @ref I2C_mode */
uint16_t I2C_DutyCycle; /*!< Specifies the I2C fast mode duty cycle.
This parameter can be a value of @ref I2C_duty_cycle_in_fast_mode */
uint16_t I2C_OwnAddress1; /*!< Specifies the first device own address.
This parameter can be a 7-bit or 10-bit address. */
uint16_t I2C_Ack; /*!< Enables or disables the acknowledgement.
This parameter can be a value of @ref I2C_acknowledgement */
uint16_t I2C_AcknowledgedAddress; /*!< Specifies if 7-bit or 10-bit address is acknowledged.
This parameter can be a value of @ref I2C_acknowledged_address */
}I2C_InitTypeDef;
/**
* @}
*/
/** @defgroup I2C_Exported_Constants
* @{
*/
#define IS_I2C_ALL_PERIPH(PERIPH) (((PERIPH) == I2C1) || \
((PERIPH) == I2C2))
/** @defgroup I2C_mode
* @{
*/
#define I2C_Mode_I2C ((uint16_t)0x0000)
#define I2C_Mode_SMBusDevice ((uint16_t)0x0002)
#define I2C_Mode_SMBusHost ((uint16_t)0x000A)
#define IS_I2C_MODE(MODE) (((MODE) == I2C_Mode_I2C) || \
((MODE) == I2C_Mode_SMBusDevice) || \
((MODE) == I2C_Mode_SMBusHost))
/**
* @}
*/
/** @defgroup I2C_duty_cycle_in_fast_mode
* @{
*/
#define I2C_DutyCycle_16_9 ((uint16_t)0x4000) /*!< I2C fast mode Tlow/Thigh = 16/9 */
#define I2C_DutyCycle_2 ((uint16_t)0xBFFF) /*!< I2C fast mode Tlow/Thigh = 2 */
#define IS_I2C_DUTY_CYCLE(CYCLE) (((CYCLE) == I2C_DutyCycle_16_9) || \
((CYCLE) == I2C_DutyCycle_2))
/**
* @}
*/
/** @defgroup I2C_acknowledgement
* @{
*/
#define I2C_Ack_Enable ((uint16_t)0x0400)
#define I2C_Ack_Disable ((uint16_t)0x0000)
#define IS_I2C_ACK_STATE(STATE) (((STATE) == I2C_Ack_Enable) || \
((STATE) == I2C_Ack_Disable))
/**
* @}
*/
/** @defgroup I2C_transfer_direction
* @{
*/
#define I2C_Direction_Transmitter ((uint8_t)0x00)
#define I2C_Direction_Receiver ((uint8_t)0x01)
#define IS_I2C_DIRECTION(DIRECTION) (((DIRECTION) == I2C_Direction_Transmitter) || \
((DIRECTION) == I2C_Direction_Receiver))
/**
* @}
*/
/** @defgroup I2C_acknowledged_address
* @{
*/
#define I2C_AcknowledgedAddress_7bit ((uint16_t)0x4000)
#define I2C_AcknowledgedAddress_10bit ((uint16_t)0xC000)
#define IS_I2C_ACKNOWLEDGE_ADDRESS(ADDRESS) (((ADDRESS) == I2C_AcknowledgedAddress_7bit) || \
((ADDRESS) == I2C_AcknowledgedAddress_10bit))
/**
* @}
*/
/** @defgroup I2C_registers
* @{
*/
#define I2C_Register_CR1 ((uint8_t)0x00)
#define I2C_Register_CR2 ((uint8_t)0x04)
#define I2C_Register_OAR1 ((uint8_t)0x08)
#define I2C_Register_OAR2 ((uint8_t)0x0C)
#define I2C_Register_DR ((uint8_t)0x10)
#define I2C_Register_SR1 ((uint8_t)0x14)
#define I2C_Register_SR2 ((uint8_t)0x18)
#define I2C_Register_CCR ((uint8_t)0x1C)
#define I2C_Register_TRISE ((uint8_t)0x20)
#define IS_I2C_REGISTER(REGISTER) (((REGISTER) == I2C_Register_CR1) || \
((REGISTER) == I2C_Register_CR2) || \
((REGISTER) == I2C_Register_OAR1) || \
((REGISTER) == I2C_Register_OAR2) || \
((REGISTER) == I2C_Register_DR) || \
((REGISTER) == I2C_Register_SR1) || \
((REGISTER) == I2C_Register_SR2) || \
((REGISTER) == I2C_Register_CCR) || \
((REGISTER) == I2C_Register_TRISE))
/**
* @}
*/
/** @defgroup I2C_SMBus_alert_pin_level
* @{
*/
#define I2C_SMBusAlert_Low ((uint16_t)0x2000)
#define I2C_SMBusAlert_High ((uint16_t)0xDFFF)
#define IS_I2C_SMBUS_ALERT(ALERT) (((ALERT) == I2C_SMBusAlert_Low) || \
((ALERT) == I2C_SMBusAlert_High))
/**
* @}
*/
/** @defgroup I2C_PEC_position
* @{
*/
#define I2C_PECPosition_Next ((uint16_t)0x0800)
#define I2C_PECPosition_Current ((uint16_t)0xF7FF)
#define IS_I2C_PEC_POSITION(POSITION) (((POSITION) == I2C_PECPosition_Next) || \
((POSITION) == I2C_PECPosition_Current))
/**
* @}
*/
/** @defgroup I2C_NCAK_position
* @{
*/
#define I2C_NACKPosition_Next ((uint16_t)0x0800)
#define I2C_NACKPosition_Current ((uint16_t)0xF7FF)
#define IS_I2C_NACK_POSITION(POSITION) (((POSITION) == I2C_NACKPosition_Next) || \
((POSITION) == I2C_NACKPosition_Current))
/**
* @}
*/
/** @defgroup I2C_interrupts_definition
* @{
*/
#define I2C_IT_BUF ((uint16_t)0x0400)
#define I2C_IT_EVT ((uint16_t)0x0200)
#define I2C_IT_ERR ((uint16_t)0x0100)
#define IS_I2C_CONFIG_IT(IT) ((((IT) & (uint16_t)0xF8FF) == 0x00) && ((IT) != 0x00))
/**
* @}
*/
/** @defgroup I2C_interrupts_definition
* @{
*/
#define I2C_IT_SMBALERT ((uint32_t)0x01008000)
#define I2C_IT_TIMEOUT ((uint32_t)0x01004000)
#define I2C_IT_PECERR ((uint32_t)0x01001000)
#define I2C_IT_OVR ((uint32_t)0x01000800)
#define I2C_IT_AF ((uint32_t)0x01000400)
#define I2C_IT_ARLO ((uint32_t)0x01000200)
#define I2C_IT_BERR ((uint32_t)0x01000100)
#define I2C_IT_TXE ((uint32_t)0x06000080)
#define I2C_IT_RXNE ((uint32_t)0x06000040)
#define I2C_IT_STOPF ((uint32_t)0x02000010)
#define I2C_IT_ADD10 ((uint32_t)0x02000008)
#define I2C_IT_BTF ((uint32_t)0x02000004)
#define I2C_IT_ADDR ((uint32_t)0x02000002)
#define I2C_IT_SB ((uint32_t)0x02000001)
#define IS_I2C_CLEAR_IT(IT) ((((IT) & (uint16_t)0x20FF) == 0x00) && ((IT) != (uint16_t)0x00))
#define IS_I2C_GET_IT(IT) (((IT) == I2C_IT_SMBALERT) || ((IT) == I2C_IT_TIMEOUT) || \
((IT) == I2C_IT_PECERR) || ((IT) == I2C_IT_OVR) || \
((IT) == I2C_IT_AF) || ((IT) == I2C_IT_ARLO) || \
((IT) == I2C_IT_BERR) || ((IT) == I2C_IT_TXE) || \
((IT) == I2C_IT_RXNE) || ((IT) == I2C_IT_STOPF) || \
((IT) == I2C_IT_ADD10) || ((IT) == I2C_IT_BTF) || \
((IT) == I2C_IT_ADDR) || ((IT) == I2C_IT_SB))
/**
* @}
*/
/** @defgroup I2C_flags_definition
* @{
*/
/**
* @brief SR2 register flags
*/
#define I2C_FLAG_DUALF ((uint32_t)0x00800000)
#define I2C_FLAG_SMBHOST ((uint32_t)0x00400000)
#define I2C_FLAG_SMBDEFAULT ((uint32_t)0x00200000)
#define I2C_FLAG_GENCALL ((uint32_t)0x00100000)
#define I2C_FLAG_TRA ((uint32_t)0x00040000)
#define I2C_FLAG_BUSY ((uint32_t)0x00020000)
#define I2C_FLAG_MSL ((uint32_t)0x00010000)
/**
* @brief SR1 register flags
*/
#define I2C_FLAG_SMBALERT ((uint32_t)0x10008000)
#define I2C_FLAG_TIMEOUT ((uint32_t)0x10004000)
#define I2C_FLAG_PECERR ((uint32_t)0x10001000)
#define I2C_FLAG_OVR ((uint32_t)0x10000800)
#define I2C_FLAG_AF ((uint32_t)0x10000400)
#define I2C_FLAG_ARLO ((uint32_t)0x10000200)
#define I2C_FLAG_BERR ((uint32_t)0x10000100)
#define I2C_FLAG_TXE ((uint32_t)0x10000080)
#define I2C_FLAG_RXNE ((uint32_t)0x10000040)
#define I2C_FLAG_STOPF ((uint32_t)0x10000010)
#define I2C_FLAG_ADD10 ((uint32_t)0x10000008)
#define I2C_FLAG_BTF ((uint32_t)0x10000004)
#define I2C_FLAG_ADDR ((uint32_t)0x10000002)
#define I2C_FLAG_SB ((uint32_t)0x10000001)
#define IS_I2C_CLEAR_FLAG(FLAG) ((((FLAG) & (uint16_t)0x20FF) == 0x00) && ((FLAG) != (uint16_t)0x00))
#define IS_I2C_GET_FLAG(FLAG) (((FLAG) == I2C_FLAG_DUALF) || ((FLAG) == I2C_FLAG_SMBHOST) || \
((FLAG) == I2C_FLAG_SMBDEFAULT) || ((FLAG) == I2C_FLAG_GENCALL) || \
((FLAG) == I2C_FLAG_TRA) || ((FLAG) == I2C_FLAG_BUSY) || \
((FLAG) == I2C_FLAG_MSL) || ((FLAG) == I2C_FLAG_SMBALERT) || \
((FLAG) == I2C_FLAG_TIMEOUT) || ((FLAG) == I2C_FLAG_PECERR) || \
((FLAG) == I2C_FLAG_OVR) || ((FLAG) == I2C_FLAG_AF) || \
((FLAG) == I2C_FLAG_ARLO) || ((FLAG) == I2C_FLAG_BERR) || \
((FLAG) == I2C_FLAG_TXE) || ((FLAG) == I2C_FLAG_RXNE) || \
((FLAG) == I2C_FLAG_STOPF) || ((FLAG) == I2C_FLAG_ADD10) || \
((FLAG) == I2C_FLAG_BTF) || ((FLAG) == I2C_FLAG_ADDR) || \
((FLAG) == I2C_FLAG_SB))
/**
* @}
*/
/** @defgroup I2C_Events
* @{
*/
/*========================================
I2C Master Events (Events grouped in order of communication)
==========================================*/
/**
* @brief Communication start
*
* After sending the START condition (I2C_GenerateSTART() function) the master
* has to wait for this event. It means that the Start condition has been correctly
* released on the I2C bus (the bus is free, no other devices is communicating).
*
*/
/* --EV5 */
#define I2C_EVENT_MASTER_MODE_SELECT ((uint32_t)0x00030001) /* BUSY, MSL and SB flag */
/**
* @brief Address Acknowledge
*
* After checking on EV5 (start condition correctly released on the bus), the
* master sends the address of the slave(s) with which it will communicate
* (I2C_Send7bitAddress() function, it also determines the direction of the communication:
* Master transmitter or Receiver). Then the master has to wait that a slave acknowledges
* his address. If an acknowledge is sent on the bus, one of the following events will
* be set:
*
* 1) In case of Master Receiver (7-bit addressing): the I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED
* event is set.
*
* 2) In case of Master Transmitter (7-bit addressing): the I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED
* is set
*
* 3) In case of 10-Bit addressing mode, the master (just after generating the START
* and checking on EV5) has to send the header of 10-bit addressing mode (I2C_SendData()
* function). Then master should wait on EV9. It means that the 10-bit addressing
* header has been correctly sent on the bus. Then master should send the second part of
* the 10-bit address (LSB) using the function I2C_Send7bitAddress(). Then master
* should wait for event EV6.
*
*/
/* --EV6 */
#define I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED ((uint32_t)0x00070082) /* BUSY, MSL, ADDR, TXE and TRA flags */
#define I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED ((uint32_t)0x00030002) /* BUSY, MSL and ADDR flags */
/* --EV9 */
#define I2C_EVENT_MASTER_MODE_ADDRESS10 ((uint32_t)0x00030008) /* BUSY, MSL and ADD10 flags */
/**
* @brief Communication events
*
* If a communication is established (START condition generated and slave address
* acknowledged) then the master has to check on one of the following events for
* communication procedures:
*
* 1) Master Receiver mode: The master has to wait on the event EV7 then to read
* the data received from the slave (I2C_ReceiveData() function).
*
* 2) Master Transmitter mode: The master has to send data (I2C_SendData()
* function) then to wait on event EV8 or EV8_2.
* These two events are similar:
* - EV8 means that the data has been written in the data register and is
* being shifted out.
* - EV8_2 means that the data has been physically shifted out and output
* on the bus.
* In most cases, using EV8 is sufficient for the application.
* Using EV8_2 leads to a slower communication but ensure more reliable test.
* EV8_2 is also more suitable than EV8 for testing on the last data transmission
* (before Stop condition generation).
*
* @note In case the user software does not guarantee that this event EV7 is
* managed before the current byte end of transfer, then user may check on EV7
* and BTF flag at the same time (ie. (I2C_EVENT_MASTER_BYTE_RECEIVED | I2C_FLAG_BTF)).
* In this case the communication may be slower.
*
*/
/* Master RECEIVER mode -----------------------------*/
/* --EV7 */
#define I2C_EVENT_MASTER_BYTE_RECEIVED ((uint32_t)0x00030040) /* BUSY, MSL and RXNE flags */
/* Master TRANSMITTER mode --------------------------*/
/* --EV8 */
#define I2C_EVENT_MASTER_BYTE_TRANSMITTING ((uint32_t)0x00070080) /* TRA, BUSY, MSL, TXE flags */
/* --EV8_2 */
#define I2C_EVENT_MASTER_BYTE_TRANSMITTED ((uint32_t)0x00070084) /* TRA, BUSY, MSL, TXE and BTF flags */
/*========================================
I2C Slave Events (Events grouped in order of communication)
==========================================*/
/**
* @brief Communication start events
*
* Wait on one of these events at the start of the communication. It means that
* the I2C peripheral detected a Start condition on the bus (generated by master
* device) followed by the peripheral address. The peripheral generates an ACK
* condition on the bus (if the acknowledge feature is enabled through function
* I2C_AcknowledgeConfig()) and the events listed above are set :
*
* 1) In normal case (only one address managed by the slave), when the address
* sent by the master matches the own address of the peripheral (configured by
* I2C_OwnAddress1 field) the I2C_EVENT_SLAVE_XXX_ADDRESS_MATCHED event is set
* (where XXX could be TRANSMITTER or RECEIVER).
*
* 2) In case the address sent by the master matches the second address of the
* peripheral (configured by the function I2C_OwnAddress2Config() and enabled
* by the function I2C_DualAddressCmd()) the events I2C_EVENT_SLAVE_XXX_SECONDADDRESS_MATCHED
* (where XXX could be TRANSMITTER or RECEIVER) are set.
*
* 3) In case the address sent by the master is General Call (address 0x00) and
* if the General Call is enabled for the peripheral (using function I2C_GeneralCallCmd())
* the following event is set I2C_EVENT_SLAVE_GENERALCALLADDRESS_MATCHED.
*
*/
/* --EV1 (all the events below are variants of EV1) */
/* 1) Case of One Single Address managed by the slave */
#define I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED ((uint32_t)0x00020002) /* BUSY and ADDR flags */
#define I2C_EVENT_SLAVE_TRANSMITTER_ADDRESS_MATCHED ((uint32_t)0x00060082) /* TRA, BUSY, TXE and ADDR flags */
/* 2) Case of Dual address managed by the slave */
#define I2C_EVENT_SLAVE_RECEIVER_SECONDADDRESS_MATCHED ((uint32_t)0x00820000) /* DUALF and BUSY flags */
#define I2C_EVENT_SLAVE_TRANSMITTER_SECONDADDRESS_MATCHED ((uint32_t)0x00860080) /* DUALF, TRA, BUSY and TXE flags */
/* 3) Case of General Call enabled for the slave */
#define I2C_EVENT_SLAVE_GENERALCALLADDRESS_MATCHED ((uint32_t)0x00120000) /* GENCALL and BUSY flags */
/**
* @brief Communication events
*
* Wait on one of these events when EV1 has already been checked and:
*
* - Slave RECEIVER mode:
* - EV2: When the application is expecting a data byte to be received.
* - EV4: When the application is expecting the end of the communication: master
* sends a stop condition and data transmission is stopped.
*
* - Slave Transmitter mode:
* - EV3: When a byte has been transmitted by the slave and the application is expecting
* the end of the byte transmission. The two events I2C_EVENT_SLAVE_BYTE_TRANSMITTED and
* I2C_EVENT_SLAVE_BYTE_TRANSMITTING are similar. The second one can optionally be
* used when the user software doesn't guarantee the EV3 is managed before the
* current byte end of transfer.
* - EV3_2: When the master sends a NACK in order to tell slave that data transmission
* shall end (before sending the STOP condition). In this case slave has to stop sending
* data bytes and expect a Stop condition on the bus.
*
* @note In case the user software does not guarantee that the event EV2 is
* managed before the current byte end of transfer, then user may check on EV2
* and BTF flag at the same time (ie. (I2C_EVENT_SLAVE_BYTE_RECEIVED | I2C_FLAG_BTF)).
* In this case the communication may be slower.
*
*/
/* Slave RECEIVER mode --------------------------*/
/* --EV2 */
#define I2C_EVENT_SLAVE_BYTE_RECEIVED ((uint32_t)0x00020040) /* BUSY and RXNE flags */
/* --EV4 */
#define I2C_EVENT_SLAVE_STOP_DETECTED ((uint32_t)0x00000010) /* STOPF flag */
/* Slave TRANSMITTER mode -----------------------*/
/* --EV3 */
#define I2C_EVENT_SLAVE_BYTE_TRANSMITTED ((uint32_t)0x00060084) /* TRA, BUSY, TXE and BTF flags */
#define I2C_EVENT_SLAVE_BYTE_TRANSMITTING ((uint32_t)0x00060080) /* TRA, BUSY and TXE flags */
/* --EV3_2 */
#define I2C_EVENT_SLAVE_ACK_FAILURE ((uint32_t)0x00000400) /* AF flag */
/*=========================== End of Events Description ==========================================*/
#define IS_I2C_EVENT(EVENT) (((EVENT) == I2C_EVENT_SLAVE_TRANSMITTER_ADDRESS_MATCHED) || \
((EVENT) == I2C_EVENT_SLAVE_RECEIVER_ADDRESS_MATCHED) || \
((EVENT) == I2C_EVENT_SLAVE_TRANSMITTER_SECONDADDRESS_MATCHED) || \
((EVENT) == I2C_EVENT_SLAVE_RECEIVER_SECONDADDRESS_MATCHED) || \
((EVENT) == I2C_EVENT_SLAVE_GENERALCALLADDRESS_MATCHED) || \
((EVENT) == I2C_EVENT_SLAVE_BYTE_RECEIVED) || \
((EVENT) == (I2C_EVENT_SLAVE_BYTE_RECEIVED | I2C_FLAG_DUALF)) || \
((EVENT) == (I2C_EVENT_SLAVE_BYTE_RECEIVED | I2C_FLAG_GENCALL)) || \
((EVENT) == I2C_EVENT_SLAVE_BYTE_TRANSMITTED) || \
((EVENT) == (I2C_EVENT_SLAVE_BYTE_TRANSMITTED | I2C_FLAG_DUALF)) || \
((EVENT) == (I2C_EVENT_SLAVE_BYTE_TRANSMITTED | I2C_FLAG_GENCALL)) || \
((EVENT) == I2C_EVENT_SLAVE_STOP_DETECTED) || \
((EVENT) == I2C_EVENT_MASTER_MODE_SELECT) || \
((EVENT) == I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED) || \
((EVENT) == I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED) || \
((EVENT) == I2C_EVENT_MASTER_BYTE_RECEIVED) || \
((EVENT) == I2C_EVENT_MASTER_BYTE_TRANSMITTED) || \
((EVENT) == I2C_EVENT_MASTER_BYTE_TRANSMITTING) || \
((EVENT) == I2C_EVENT_MASTER_MODE_ADDRESS10) || \
((EVENT) == I2C_EVENT_SLAVE_ACK_FAILURE))
/**
* @}
*/
/** @defgroup I2C_own_address1
* @{
*/
#define IS_I2C_OWN_ADDRESS1(ADDRESS1) ((ADDRESS1) <= 0x3FF)
/**
* @}
*/
/** @defgroup I2C_clock_speed
* @{
*/
#define IS_I2C_CLOCK_SPEED(SPEED) (((SPEED) >= 0x1) && ((SPEED) <= 400000))
/**
* @}
*/
/**
* @}
*/
/** @defgroup I2C_Exported_Macros
* @{
*/
/**
* @}
*/
/** @defgroup I2C_Exported_Functions
* @{
*/
void I2C_DeInit(I2C_TypeDef* I2Cx);
void I2C_Init(I2C_TypeDef* I2Cx, I2C_InitTypeDef* I2C_InitStruct);
void I2C_StructInit(I2C_InitTypeDef* I2C_InitStruct);
void I2C_Cmd(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_DMACmd(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_DMALastTransferCmd(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_GenerateSTART(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_GenerateSTOP(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_AcknowledgeConfig(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_OwnAddress2Config(I2C_TypeDef* I2Cx, uint8_t Address);
void I2C_DualAddressCmd(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_GeneralCallCmd(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_ITConfig(I2C_TypeDef* I2Cx, uint16_t I2C_IT, FunctionalState NewState);
void I2C_SendData(I2C_TypeDef* I2Cx, uint8_t Data);
uint8_t I2C_ReceiveData(I2C_TypeDef* I2Cx);
void I2C_Send7bitAddress(I2C_TypeDef* I2Cx, uint8_t Address, uint8_t I2C_Direction);
uint16_t I2C_ReadRegister(I2C_TypeDef* I2Cx, uint8_t I2C_Register);
void I2C_SoftwareResetCmd(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_NACKPositionConfig(I2C_TypeDef* I2Cx, uint16_t I2C_NACKPosition);
void I2C_SMBusAlertConfig(I2C_TypeDef* I2Cx, uint16_t I2C_SMBusAlert);
void I2C_TransmitPEC(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_PECPositionConfig(I2C_TypeDef* I2Cx, uint16_t I2C_PECPosition);
void I2C_CalculatePEC(I2C_TypeDef* I2Cx, FunctionalState NewState);
uint8_t I2C_GetPEC(I2C_TypeDef* I2Cx);
void I2C_ARPCmd(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_StretchClockCmd(I2C_TypeDef* I2Cx, FunctionalState NewState);
void I2C_FastModeDutyCycleConfig(I2C_TypeDef* I2Cx, uint16_t I2C_DutyCycle);
/**
* @brief
****************************************************************************************
*
* I2C State Monitoring Functions
*
****************************************************************************************
* This I2C driver provides three different ways for I2C state monitoring
* depending on the application requirements and constraints:
*
*
* 1) Basic state monitoring:
* Using I2C_CheckEvent() function:
* It compares the status registers (SR1 and SR2) content to a given event
* (can be the combination of one or more flags).
* It returns SUCCESS if the current status includes the given flags
* and returns ERROR if one or more flags are missing in the current status.
* - When to use:
* - This function is suitable for most applications as well as for startup
* activity since the events are fully described in the product reference manual
* (RM0008).
* - It is also suitable for users who need to define their own events.
* - Limitations:
* - If an error occurs (ie. error flags are set besides to the monitored flags),
* the I2C_CheckEvent() function may return SUCCESS despite the communication
* hold or corrupted real state.
* In this case, it is advised to use error interrupts to monitor the error
* events and handle them in the interrupt IRQ handler.
*
* @note
* For error management, it is advised to use the following functions:
* - I2C_ITConfig() to configure and enable the error interrupts (I2C_IT_ERR).
* - I2Cx_ER_IRQHandler() which is called when the error interrupt occurs.
* Where x is the peripheral instance (I2C1, I2C2 ...)
* - I2C_GetFlagStatus() or I2C_GetITStatus() to be called into I2Cx_ER_IRQHandler()
* in order to determine which error occurred.
* - I2C_ClearFlag() or I2C_ClearITPendingBit() and/or I2C_SoftwareResetCmd()
* and/or I2C_GenerateStop() in order to clear the error flag and source,
* and return to correct communication status.
*
*
* 2) Advanced state monitoring:
* Using the function I2C_GetLastEvent() which returns the image of both status
* registers in a single word (uint32_t) (Status Register 2 value is shifted left
* by 16 bits and concatenated to Status Register 1).
* - When to use:
* - This function is suitable for the same applications above but it allows to
* overcome the limitations of I2C_GetFlagStatus() function (see below).
* The returned value could be compared to events already defined in the
* library (stm32f10x_i2c.h) or to custom values defined by user.
* - This function is suitable when multiple flags are monitored at the same time.
* - At the opposite of I2C_CheckEvent() function, this function allows user to
* choose when an event is accepted (when all events flags are set and no
* other flags are set or just when the needed flags are set like
* I2C_CheckEvent() function).
* - Limitations:
* - User may need to define his own events.
* - Same remark concerning the error management is applicable for this
* function if user decides to check only regular communication flags (and
* ignores error flags).
*
*
* 3) Flag-based state monitoring:
* Using the function I2C_GetFlagStatus() which simply returns the status of
* one single flag (ie. I2C_FLAG_RXNE ...).
* - When to use:
* - This function could be used for specific applications or in debug phase.
* - It is suitable when only one flag checking is needed (most I2C events
* are monitored through multiple flags).
* - Limitations:
* - When calling this function, the Status register is accessed. Some flags are
* cleared when the status register is accessed. So checking the status
* of one Flag, may clear other ones.
* - Function may need to be called twice or more in order to monitor one
* single event.
*
*/
/**
*
* 1) Basic state monitoring
*******************************************************************************
*/
ErrorStatus I2C_CheckEvent(I2C_TypeDef* I2Cx, uint32_t I2C_EVENT);
/**
*
* 2) Advanced state monitoring
*******************************************************************************
*/
uint32_t I2C_GetLastEvent(I2C_TypeDef* I2Cx);
/**
*
* 3) Flag-based state monitoring
*******************************************************************************
*/
FlagStatus I2C_GetFlagStatus(I2C_TypeDef* I2Cx, uint32_t I2C_FLAG);
/**
*
*******************************************************************************
*/
void I2C_ClearFlag(I2C_TypeDef* I2Cx, uint32_t I2C_FLAG);
ITStatus I2C_GetITStatus(I2C_TypeDef* I2Cx, uint32_t I2C_IT);
void I2C_ClearITPendingBit(I2C_TypeDef* I2Cx, uint32_t I2C_IT);
#ifdef __cplusplus
}
#endif
#endif /*__STM32F10x_I2C_H */
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
|
