1 /**
2 ******************************************************************************
3 * @file stm32l1xx_hal_uart.c
4 * @author MCD Application Team
5 * @brief UART HAL module driver.
6 * This file provides firmware functions to manage the following
7 * functionalities of the Universal Asynchronous Receiver Transmitter (UART) peripheral:
8 * + Initialization and de-initialization functions
9 * + IO operation functions
10 * + Peripheral Control functions
11 * + Peripheral State and Errors functions
12 @verbatim
13 ==============================================================================
14 ##### How to use this driver #####
15 ==============================================================================
16 [..]
17 The UART HAL driver can be used as follows:
18
19 (#) Declare a UART_HandleTypeDef handle structure.
20
21 (#) Initialize the UART low level resources by implementing the HAL_UART_MspInit() API:
22 (##) Enable the USARTx interface clock.
23 (##) UART pins configuration:
24 (+++) Enable the clock for the UART GPIOs.
25 (+++) Configure the UART pins as alternate function pull-up.
26 (##) NVIC configuration if you need to use interrupt process (HAL_UART_Transmit_IT()
27 and HAL_UART_Receive_IT() APIs):
28 (+++) Configure the USARTx interrupt priority.
29 (+++) Enable the NVIC USART IRQ handle.
30 (##) DMA Configuration if you need to use DMA process (HAL_UART_Transmit_DMA()
31 and HAL_UART_Receive_DMA() APIs):
32 (+++) Declare a DMA handle structure for the Tx/Rx channel.
33 (+++) Enable the DMAx interface clock.
34 (+++) Configure the declared DMA handle structure with the required
35 Tx/Rx parameters.
36 (+++) Configure the DMA Tx/Rx channel.
37 (+++) Associate the initialized DMA handle to the UART DMA Tx/Rx handle.
38 (+++) Configure the priority and enable the NVIC for the transfer complete
39 interrupt on the DMA Tx/Rx channel.
40 (+++) Configure the USARTx interrupt priority and enable the NVIC USART IRQ handle
41 (used for last byte sending completion detection in DMA non circular mode)
42
43 (#) Program the Baud Rate, Word Length, Stop Bit, Parity, Hardware
44 flow control and Mode(Receiver/Transmitter) in the huart Init structure.
45
46 (#) For the UART asynchronous mode, initialize the UART registers by calling
47 the HAL_UART_Init() API.
48
49 (#) For the UART Half duplex mode, initialize the UART registers by calling
50 the HAL_HalfDuplex_Init() API.
51
52 (#) For the LIN mode, initialize the UART registers by calling the HAL_LIN_Init() API.
53
54 (#) For the Multi-Processor mode, initialize the UART registers by calling
55 the HAL_MultiProcessor_Init() API.
56
57 [..]
58 (@) The specific UART interrupts (Transmission complete interrupt,
59 RXNE interrupt and Error Interrupts) will be managed using the macros
60 __HAL_UART_ENABLE_IT() and __HAL_UART_DISABLE_IT() inside the transmit
61 and receive process.
62
63 [..]
64 (@) These APIs (HAL_UART_Init() and HAL_HalfDuplex_Init()) configure also the
65 low level Hardware GPIO, CLOCK, CORTEX...etc) by calling the customed
66 HAL_UART_MspInit() API.
67
68 [..]
69 Three operation modes are available within this driver :
70
71 *** Polling mode IO operation ***
72 =================================
73 [..]
74 (+) Send an amount of data in blocking mode using HAL_UART_Transmit()
75 (+) Receive an amount of data in blocking mode using HAL_UART_Receive()
76
77 *** Interrupt mode IO operation ***
78 ===================================
79 [..]
80 (+) Send an amount of data in non blocking mode using HAL_UART_Transmit_IT()
81 (+) At transmission end of transfer HAL_UART_TxCpltCallback is executed and user can
82 add his own code by customization of function pointer HAL_UART_TxCpltCallback
83 (+) Receive an amount of data in non blocking mode using HAL_UART_Receive_IT()
84 (+) At reception end of transfer HAL_UART_RxCpltCallback is executed and user can
85 add his own code by customization of function pointer HAL_UART_RxCpltCallback
86 (+) In case of transfer Error, HAL_UART_ErrorCallback() function is executed and user can
87 add his own code by customization of function pointer HAL_UART_ErrorCallback
88
89 *** DMA mode IO operation ***
90 ==============================
91 [..]
92 (+) Send an amount of data in non blocking mode (DMA) using HAL_UART_Transmit_DMA()
93 (+) At transmission end of half transfer HAL_UART_TxHalfCpltCallback is executed and user can
94 add his own code by customization of function pointer HAL_UART_TxHalfCpltCallback
95 (+) At transmission end of transfer HAL_UART_TxCpltCallback is executed and user can
96 add his own code by customization of function pointer HAL_UART_TxCpltCallback
97 (+) Receive an amount of data in non blocking mode (DMA) using HAL_UART_Receive_DMA()
98 (+) At reception end of half transfer HAL_UART_RxHalfCpltCallback is executed and user can
99 add his own code by customization of function pointer HAL_UART_RxHalfCpltCallback
100 (+) At reception end of transfer HAL_UART_RxCpltCallback is executed and user can
101 add his own code by customization of function pointer HAL_UART_RxCpltCallback
102 (+) In case of transfer Error, HAL_UART_ErrorCallback() function is executed and user can
103 add his own code by customization of function pointer HAL_UART_ErrorCallback
104 (+) Pause the DMA Transfer using HAL_UART_DMAPause()
105 (+) Resume the DMA Transfer using HAL_UART_DMAResume()
106 (+) Stop the DMA Transfer using HAL_UART_DMAStop()
107
108 *** UART HAL driver macros list ***
109 =============================================
110 [..]
111 Below the list of most used macros in UART HAL driver.
112
113 (+) __HAL_UART_ENABLE: Enable the UART peripheral
114 (+) __HAL_UART_DISABLE: Disable the UART peripheral
115 (+) __HAL_UART_GET_FLAG : Check whether the specified UART flag is set or not
116 (+) __HAL_UART_CLEAR_FLAG : Clear the specified UART pending flag
117 (+) __HAL_UART_ENABLE_IT: Enable the specified UART interrupt
118 (+) __HAL_UART_DISABLE_IT: Disable the specified UART interrupt
119 (+) __HAL_UART_GET_IT_SOURCE: Check whether the specified UART interrupt has occurred or not
120
121 [..]
122 (@) You can refer to the UART HAL driver header file for more useful macros
123
124 @endverbatim
125 ******************************************************************************
126 * @attention
127 *
128 * <h2><center>© COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
129 *
130 * Redistribution and use in source and binary forms, with or without modification,
131 * are permitted provided that the following conditions are met:
132 * 1. Redistributions of source code must retain the above copyright notice,
133 * this list of conditions and the following disclaimer.
134 * 2. Redistributions in binary form must reproduce the above copyright notice,
135 * this list of conditions and the following disclaimer in the documentation
136 * and/or other materials provided with the distribution.
137 * 3. Neither the name of STMicroelectronics nor the names of its contributors
138 * may be used to endorse or promote products derived from this software
139 * without specific prior written permission.
140 *
141 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
142 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
143 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
144 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
145 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
146 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
147 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
148 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
149 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
150 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
151 *
152 ******************************************************************************
153 */
154
155 /* Includes ------------------------------------------------------------------*/
156 #include "stm32l1xx_hal.h"
157
158 /** @addtogroup STM32L1xx_HAL_Driver
159 * @{
160 */
161
162 /** @defgroup UART UART
163 * @brief HAL UART module driver
164 * @{
165 */
166 #ifdef HAL_UART_MODULE_ENABLED
167
168 /* Private typedef -----------------------------------------------------------*/
169 /* Private define ------------------------------------------------------------*/
170 /* Private macros ------------------------------------------------------------*/
171 /* Private variables ---------------------------------------------------------*/
172 /* Private function prototypes -----------------------------------------------*/
173 /** @addtogroup UART_Private_Functions UART Private Functions
174 * @{
175 */
176 static void UART_SetConfig (UART_HandleTypeDef *huart);
177 static HAL_StatusTypeDef UART_Transmit_IT(UART_HandleTypeDef *huart);
178 static HAL_StatusTypeDef UART_EndTransmit_IT(UART_HandleTypeDef *huart);
179 static HAL_StatusTypeDef UART_Receive_IT(UART_HandleTypeDef *huart);
180 static void UART_DMATransmitCplt(DMA_HandleTypeDef *hdma);
181 static void UART_DMATxHalfCplt(DMA_HandleTypeDef *hdma);
182 static void UART_DMAReceiveCplt(DMA_HandleTypeDef *hdma);
183 static void UART_DMARxHalfCplt(DMA_HandleTypeDef *hdma);
184 static void UART_DMAError(DMA_HandleTypeDef *hdma);
185 static HAL_StatusTypeDef UART_WaitOnFlagUntilTimeout(UART_HandleTypeDef *huart, uint32_t Flag, FlagStatus Status, uint32_t Timeout);
186 /**
187 * @}
188 */
189
190 /* Exported functions ---------------------------------------------------------*/
191
192 /** @defgroup UART_Exported_Functions UART Exported Functions
193 * @{
194 */
195
196 /** @defgroup UART_Exported_Functions_Group1 Initialization and de-initialization functions
197 * @brief Initialization and Configuration functions
198 *
199 @verbatim
200 ===============================================================================
201 ##### Initialization and Configuration functions #####
202 ===============================================================================
203 [..]
204 This subsection provides a set of functions allowing to initialize the USARTx or the UARTy
205 in asynchronous mode.
206 (+) For the asynchronous mode only these parameters can be configured:
207 (++) Baud Rate
208 (++) Word Length
209 (++) Stop Bit
210 (++) Parity
211 (++) Hardware flow control
212 (++) Receiver/transmitter modes
213 (++) Over Sampling Methode
214 [..]
215 The HAL_UART_Init(), HAL_HalfDuplex_Init(), HAL_LIN_Init() and HAL_MultiProcessor_Init() APIs
216 follow respectively the UART asynchronous, UART Half duplex, LIN and Multi-Processor
217 configuration procedures (details for the procedures are available in reference manual (RM0038)).
218
219 @endverbatim
220 * @{
221 */
222
223 /*
224 Additionnal remark: If the parity is enabled, then the MSB bit of the data written
225 in the data register is transmitted but is changed by the parity bit.
226 Depending on the frame length defined by the M bit (8-bits or 9-bits),
227 the possible UART frame formats are as listed in the following table:
228 +-------------------------------------------------------------+
229 | M bit | PCE bit | UART frame |
230 |---------------------|---------------------------------------|
231 | 0 | 0 | | SB | 8 bit data | STB | |
232 |---------|-----------|---------------------------------------|
233 | 0 | 1 | | SB | 7 bit data | PB | STB | |
234 |---------|-----------|---------------------------------------|
235 | 1 | 0 | | SB | 9 bit data | STB | |
236 |---------|-----------|---------------------------------------|
237 | 1 | 1 | | SB | 8 bit data | PB | STB | |
238 +-------------------------------------------------------------+
239 */
240
241 /**
242 * @brief Initializes the UART mode according to the specified parameters in
243 * the UART_InitTypeDef and create the associated handle.
244 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
245 * the configuration information for the specified UART module.
246 * @retval HAL status
247 */
HAL_UART_Init(UART_HandleTypeDef * huart)248 HAL_StatusTypeDef HAL_UART_Init(UART_HandleTypeDef *huart)
249 {
250 /* Check the UART handle allocation */
251 if(huart == NULL)
252 {
253 return HAL_ERROR;
254 }
255
256 /* Check the parameters */
257 if(huart->Init.HwFlowCtl != UART_HWCONTROL_NONE)
258 {
259 /* The hardware flow control is available only for USART1, USART2, USART3 */
260 assert_param(IS_UART_HWFLOW_INSTANCE(huart->Instance));
261 assert_param(IS_UART_HARDWARE_FLOW_CONTROL(huart->Init.HwFlowCtl));
262 }
263 else
264 {
265 assert_param(IS_UART_INSTANCE(huart->Instance));
266 }
267 assert_param(IS_UART_WORD_LENGTH(huart->Init.WordLength));
268 assert_param(IS_UART_OVERSAMPLING(huart->Init.OverSampling));
269
270 if(huart->State == HAL_UART_STATE_RESET)
271 {
272 /* Allocate lock resource and initialize it */
273 huart->Lock = HAL_UNLOCKED;
274
275 /* Init the low level hardware */
276 HAL_UART_MspInit(huart);
277 }
278
279 huart->State = HAL_UART_STATE_BUSY;
280
281 /* Disable the peripheral */
282 __HAL_UART_DISABLE(huart);
283
284 /* Set the UART Communication parameters */
285 UART_SetConfig(huart);
286
287 /* In asynchronous mode, the following bits must be kept cleared:
288 - LINEN and CLKEN bits in the USART_CR2 register,
289 - SCEN, HDSEL and IREN bits in the USART_CR3 register.*/
290 CLEAR_BIT(huart->Instance->CR2, (USART_CR2_LINEN | USART_CR2_CLKEN));
291 CLEAR_BIT(huart->Instance->CR3, (USART_CR3_SCEN | USART_CR3_HDSEL | USART_CR3_IREN));
292
293 /* Enable the peripheral */
294 __HAL_UART_ENABLE(huart);
295
296 /* Initialize the UART state */
297 huart->ErrorCode = HAL_UART_ERROR_NONE;
298 huart->State= HAL_UART_STATE_READY;
299
300 return HAL_OK;
301 }
302
303 /**
304 * @brief Initializes the half-duplex mode according to the specified
305 * parameters in the UART_InitTypeDef and create the associated handle.
306 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
307 * the configuration information for the specified UART module.
308 * @retval HAL status
309 */
HAL_HalfDuplex_Init(UART_HandleTypeDef * huart)310 HAL_StatusTypeDef HAL_HalfDuplex_Init(UART_HandleTypeDef *huart)
311 {
312 /* Check the UART handle allocation */
313 if(huart == NULL)
314 {
315 return HAL_ERROR;
316 }
317
318 /* Check UART instance */
319 assert_param(IS_UART_HALFDUPLEX_INSTANCE(huart->Instance));
320 assert_param(IS_UART_WORD_LENGTH(huart->Init.WordLength));
321 assert_param(IS_UART_OVERSAMPLING(huart->Init.OverSampling));
322
323 if(huart->State == HAL_UART_STATE_RESET)
324 {
325 /* Allocate lock resource and initialize it */
326 huart->Lock = HAL_UNLOCKED;
327
328 /* Init the low level hardware */
329 HAL_UART_MspInit(huart);
330 }
331
332 huart->State = HAL_UART_STATE_BUSY;
333
334 /* Disable the peripheral */
335 __HAL_UART_DISABLE(huart);
336
337 /* Set the UART Communication parameters */
338 UART_SetConfig(huart);
339
340 /* In half-duplex mode, the following bits must be kept cleared:
341 - LINEN and CLKEN bits in the USART_CR2 register,
342 - SCEN and IREN bits in the USART_CR3 register.*/
343 CLEAR_BIT(huart->Instance->CR2, (USART_CR2_LINEN | USART_CR2_CLKEN));
344 CLEAR_BIT(huart->Instance->CR3, (USART_CR3_IREN | USART_CR3_SCEN));
345
346 /* Enable the Half-Duplex mode by setting the HDSEL bit in the CR3 register */
347 SET_BIT(huart->Instance->CR3, USART_CR3_HDSEL);
348
349 /* Enable the peripheral */
350 __HAL_UART_ENABLE(huart);
351
352 /* Initialize the UART state*/
353 huart->ErrorCode = HAL_UART_ERROR_NONE;
354 huart->State= HAL_UART_STATE_READY;
355
356 return HAL_OK;
357 }
358
359 /**
360 * @brief Initializes the LIN mode according to the specified
361 * parameters in the UART_InitTypeDef and create the associated handle.
362 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
363 * the configuration information for the specified UART module.
364 * @param BreakDetectLength: Specifies the LIN break detection length.
365 * This parameter can be one of the following values:
366 * @arg UART_LINBREAKDETECTLENGTH_10B: 10-bit break detection
367 * @arg UART_LINBREAKDETECTLENGTH_11B: 11-bit break detection
368 * @retval HAL status
369 */
HAL_LIN_Init(UART_HandleTypeDef * huart,uint32_t BreakDetectLength)370 HAL_StatusTypeDef HAL_LIN_Init(UART_HandleTypeDef *huart, uint32_t BreakDetectLength)
371 {
372 /* Check the UART handle allocation */
373 if(huart == NULL)
374 {
375 return HAL_ERROR;
376 }
377
378 /* Check the LIN UART instance */
379 assert_param(IS_UART_LIN_INSTANCE(huart->Instance));
380 /* Check the Break detection length parameter */
381 assert_param(IS_UART_LIN_BREAK_DETECT_LENGTH(BreakDetectLength));
382 assert_param(IS_UART_LIN_WORD_LENGTH(huart->Init.WordLength));
383 assert_param(IS_UART_LIN_OVERSAMPLING(huart->Init.OverSampling));
384
385 if(huart->State == HAL_UART_STATE_RESET)
386 {
387 /* Allocate lock resource and initialize it */
388 huart->Lock = HAL_UNLOCKED;
389
390 /* Init the low level hardware */
391 HAL_UART_MspInit(huart);
392 }
393
394 huart->State = HAL_UART_STATE_BUSY;
395
396 /* Disable the peripheral */
397 __HAL_UART_DISABLE(huart);
398
399 /* Set the UART Communication parameters */
400 UART_SetConfig(huart);
401
402 /* In LIN mode, the following bits must be kept cleared:
403 - CLKEN bits in the USART_CR2 register,
404 - SCEN and IREN bits in the USART_CR3 register.*/
405 CLEAR_BIT(huart->Instance->CR2, USART_CR2_CLKEN);
406 CLEAR_BIT(huart->Instance->CR3, (USART_CR3_HDSEL | USART_CR3_IREN | USART_CR3_SCEN));
407
408 /* Enable the LIN mode by setting the LINEN bit in the CR2 register */
409 SET_BIT(huart->Instance->CR2, USART_CR2_LINEN);
410
411 /* Set the USART LIN Break detection length. */
412 MODIFY_REG(huart->Instance->CR2, USART_CR2_LBDL, BreakDetectLength);
413
414 /* Enable the peripheral */
415 __HAL_UART_ENABLE(huart);
416
417 /* Initialize the UART state*/
418 huart->ErrorCode = HAL_UART_ERROR_NONE;
419 huart->State= HAL_UART_STATE_READY;
420
421 return HAL_OK;
422 }
423
424 /**
425 * @brief Initializes the Multi-Processor mode according to the specified
426 * parameters in the UART_InitTypeDef and create the associated handle.
427 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
428 * the configuration information for the specified UART module.
429 * @param Address: UART node address
430 * @param WakeUpMethod: specifies the UART wakeup method.
431 * This parameter can be one of the following values:
432 * @arg UART_WAKEUPMETHOD_IDLELINE: Wakeup by an idle line detection
433 * @arg UART_WAKEUPMETHOD_ADDRESSMARK: Wakeup by an address mark
434 * @retval HAL status
435 */
HAL_MultiProcessor_Init(UART_HandleTypeDef * huart,uint8_t Address,uint32_t WakeUpMethod)436 HAL_StatusTypeDef HAL_MultiProcessor_Init(UART_HandleTypeDef *huart, uint8_t Address, uint32_t WakeUpMethod)
437 {
438 /* Check the UART handle allocation */
439 if(huart == NULL)
440 {
441 return HAL_ERROR;
442 }
443
444 /* Check UART instance capabilities */
445 assert_param(IS_UART_MULTIPROCESSOR_INSTANCE(huart->Instance));
446
447 /* Check the Address & wake up method parameters */
448 assert_param(IS_UART_WAKEUPMETHOD(WakeUpMethod));
449 assert_param(IS_UART_ADDRESS(Address));
450 assert_param(IS_UART_WORD_LENGTH(huart->Init.WordLength));
451 assert_param(IS_UART_OVERSAMPLING(huart->Init.OverSampling));
452
453 if(huart->State == HAL_UART_STATE_RESET)
454 {
455 /* Allocate lock resource and initialize it */
456 huart->Lock = HAL_UNLOCKED;
457
458 /* Init the low level hardware */
459 HAL_UART_MspInit(huart);
460 }
461
462 huart->State = HAL_UART_STATE_BUSY;
463
464 /* Disable the peripheral */
465 __HAL_UART_DISABLE(huart);
466
467 /* Set the UART Communication parameters */
468 UART_SetConfig(huart);
469
470 /* In Multi-Processor mode, the following bits must be kept cleared:
471 - LINEN and CLKEN bits in the USART_CR2 register,
472 - SCEN, HDSEL and IREN bits in the USART_CR3 register */
473 CLEAR_BIT(huart->Instance->CR2, (USART_CR2_LINEN | USART_CR2_CLKEN));
474 CLEAR_BIT(huart->Instance->CR3, (USART_CR3_SCEN | USART_CR3_HDSEL | USART_CR3_IREN));
475
476 /* Set the USART address node */
477 MODIFY_REG(huart->Instance->CR2, USART_CR2_ADD, Address);
478
479 /* Set the wake up method by setting the WAKE bit in the CR1 register */
480 MODIFY_REG(huart->Instance->CR1, USART_CR1_WAKE, WakeUpMethod);
481
482 /* Enable the peripheral */
483 __HAL_UART_ENABLE(huart);
484
485 /* Initialize the UART state */
486 huart->ErrorCode = HAL_UART_ERROR_NONE;
487 huart->State= HAL_UART_STATE_READY;
488
489 return HAL_OK;
490 }
491
492 /**
493 * @brief DeInitializes the UART peripheral.
494 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
495 * the configuration information for the specified UART module.
496 * @retval HAL status
497 */
HAL_UART_DeInit(UART_HandleTypeDef * huart)498 HAL_StatusTypeDef HAL_UART_DeInit(UART_HandleTypeDef *huart)
499 {
500 /* Check the UART handle allocation */
501 if(huart == NULL)
502 {
503 return HAL_ERROR;
504 }
505
506 /* Check the parameters */
507 assert_param(IS_UART_INSTANCE(huart->Instance));
508
509 huart->State = HAL_UART_STATE_BUSY;
510
511 /* Disable the Peripheral */
512 __HAL_UART_DISABLE(huart);
513
514 huart->Instance->CR1 = 0x0;
515 huart->Instance->CR2 = 0x0;
516 huart->Instance->CR3 = 0x0;
517
518 /* DeInit the low level hardware */
519 HAL_UART_MspDeInit(huart);
520
521 huart->ErrorCode = HAL_UART_ERROR_NONE;
522 huart->State = HAL_UART_STATE_RESET;
523
524 /* Process Unlock */
525 __HAL_UNLOCK(huart);
526
527 return HAL_OK;
528 }
529
530 /**
531 * @brief UART MSP Init.
532 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
533 * the configuration information for the specified UART module.
534 * @retval None
535 */
HAL_UART_MspInit(UART_HandleTypeDef * huart)536 __weak void HAL_UART_MspInit(UART_HandleTypeDef *huart)
537 {
538 /* Prevent unused argument(s) compilation warning */
539 UNUSED(huart);
540
541 /* NOTE: This function should not be modified, when the callback is needed,
542 the HAL_UART_MspInit can be implemented in the user file
543 */
544 }
545
546 /**
547 * @brief UART MSP DeInit.
548 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
549 * the configuration information for the specified UART module.
550 * @retval None
551 */
HAL_UART_MspDeInit(UART_HandleTypeDef * huart)552 __weak void HAL_UART_MspDeInit(UART_HandleTypeDef *huart)
553 {
554 /* Prevent unused argument(s) compilation warning */
555 UNUSED(huart);
556
557 /* NOTE: This function should not be modified, when the callback is needed,
558 the HAL_UART_MspDeInit can be implemented in the user file
559 */
560 }
561
562 /**
563 * @}
564 */
565
566 /** @defgroup UART_Exported_Functions_Group2 IO operation functions
567 * @brief UART Transmit and Receive functions
568 *
569 @verbatim
570 ==============================================================================
571 ##### IO operation functions #####
572 ==============================================================================
573 [..]
574 This subsection provides a set of functions allowing to manage the UART asynchronous
575 and Half duplex data transfers.
576
577 (#) There are two modes of transfer:
578 (++) Blocking mode: The communication is performed in polling mode.
579 The HAL status of all data processing is returned by the same function
580 after finishing transfer.
581 (++) Non blocking mode: The communication is performed using Interrupts
582 or DMA, these APIs return the HAL status.
583 The end of the data processing will be indicated through the
584 dedicated UART IRQ when using Interrupt mode or the DMA IRQ when
585 using DMA mode.
586 The HAL_UART_TxCpltCallback(), HAL_UART_RxCpltCallback() user callbacks
587 will be executed respectively at the end of the transmit or receive process.
588 The HAL_UART_ErrorCallback() user callback will be executed when
589 a communication error is detected.
590
591 (#) Blocking mode APIs are:
592 (++) HAL_UART_Transmit()
593 (++) HAL_UART_Receive()
594
595 (#) Non Blocking mode APIs with Interrupt are:
596 (++) HAL_UART_Transmit_IT()
597 (++) HAL_UART_Receive_IT()
598 (++) HAL_UART_IRQHandler()
599
600 (#) Non Blocking mode functions with DMA are:
601 (++) HAL_UART_Transmit_DMA()
602 (++) HAL_UART_Receive_DMA()
603 (++) HAL_UART_DMAPause()
604 (++) HAL_UART_DMAResume()
605 (++) HAL_UART_DMAStop()
606
607 (#) A set of Transfer Complete Callbacks are provided in non blocking mode:
608 (++) HAL_UART_TxHalfCpltCallback()
609 (++) HAL_UART_TxCpltCallback()
610 (++) HAL_UART_RxHalfCpltCallback()
611 (++) HAL_UART_RxCpltCallback()
612 (++) HAL_UART_ErrorCallback()
613
614 [..]
615 (@) In the Half duplex communication, it is forbidden to run the transmit
616 and receive process in parallel, the UART state HAL_UART_STATE_BUSY_TX_RX
617 can't be useful.
618
619 @endverbatim
620 * @{
621 */
622
623 /**
624 * @brief Sends an amount of data in blocking mode.
625 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
626 * the configuration information for the specified UART module.
627 * @param pData: Pointer to data buffer
628 * @param Size: Amount of data to be sent
629 * @param Timeout: Timeout duration
630 * @retval HAL status
631 */
HAL_UART_Transmit(UART_HandleTypeDef * huart,uint8_t * pData,uint16_t Size,uint32_t Timeout)632 HAL_StatusTypeDef HAL_UART_Transmit(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout)
633 {
634 uint16_t* tmp;
635 uint32_t tmp_state = 0;
636
637 tmp_state = huart->State;
638 if((tmp_state == HAL_UART_STATE_READY) || (tmp_state == HAL_UART_STATE_BUSY_RX))
639 {
640 if((pData == NULL) || (Size == 0))
641 {
642 return HAL_ERROR;
643 }
644
645 /* Process Locked */
646 __HAL_LOCK(huart);
647
648 huart->ErrorCode = HAL_UART_ERROR_NONE;
649 /* Check if a non-blocking receive process is ongoing or not */
650 if(huart->State == HAL_UART_STATE_BUSY_RX)
651 {
652 huart->State = HAL_UART_STATE_BUSY_TX_RX;
653 }
654 else
655 {
656 huart->State = HAL_UART_STATE_BUSY_TX;
657 }
658
659 huart->TxXferSize = Size;
660 huart->TxXferCount = Size;
661 while(huart->TxXferCount > 0)
662 {
663 huart->TxXferCount--;
664 if(huart->Init.WordLength == UART_WORDLENGTH_9B)
665 {
666 if(UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_TXE, RESET, Timeout) != HAL_OK)
667 {
668 return HAL_TIMEOUT;
669 }
670 tmp = (uint16_t*) pData;
671 huart->Instance->DR = (*tmp & (uint16_t)0x01FF);
672 if(huart->Init.Parity == UART_PARITY_NONE)
673 {
674 pData +=2;
675 }
676 else
677 {
678 pData +=1;
679 }
680 }
681 else
682 {
683 if(UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_TXE, RESET, Timeout) != HAL_OK)
684 {
685 return HAL_TIMEOUT;
686 }
687 huart->Instance->DR = (*pData++ & (uint8_t)0xFF);
688 }
689 }
690
691 if(UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_TC, RESET, Timeout) != HAL_OK)
692 {
693 return HAL_TIMEOUT;
694 }
695
696 /* Check if a non-blocking receive process is ongoing or not */
697 if(huart->State == HAL_UART_STATE_BUSY_TX_RX)
698 {
699 huart->State = HAL_UART_STATE_BUSY_RX;
700 }
701 else
702 {
703 huart->State = HAL_UART_STATE_READY;
704 }
705
706 /* Process Unlocked */
707 __HAL_UNLOCK(huart);
708
709 return HAL_OK;
710 }
711 else
712 {
713 return HAL_BUSY;
714 }
715 }
716
717 /**
718 * @brief Receives an amount of data in blocking mode.
719 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
720 * the configuration information for the specified UART module.
721 * @param pData: Pointer to data buffer
722 * @param Size: Amount of data to be received
723 * @param Timeout: Timeout duration
724 * @retval HAL status
725 */
HAL_UART_Receive(UART_HandleTypeDef * huart,uint8_t * pData,uint16_t Size,uint32_t Timeout)726 HAL_StatusTypeDef HAL_UART_Receive(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size, uint32_t Timeout)
727 {
728 uint16_t* tmp;
729 uint32_t tmp_state = 0;
730
731 tmp_state = huart->State;
732 if((tmp_state == HAL_UART_STATE_READY) || (tmp_state == HAL_UART_STATE_BUSY_TX))
733 {
734 if((pData == NULL ) || (Size == 0))
735 {
736 return HAL_ERROR;
737 }
738
739 /* Process Locked */
740 __HAL_LOCK(huart);
741
742 huart->ErrorCode = HAL_UART_ERROR_NONE;
743 /* Check if a non-blocking transmit process is ongoing or not */
744 if(huart->State == HAL_UART_STATE_BUSY_TX)
745 {
746 huart->State = HAL_UART_STATE_BUSY_TX_RX;
747 }
748 else
749 {
750 huart->State = HAL_UART_STATE_BUSY_RX;
751 }
752
753 huart->RxXferSize = Size;
754 huart->RxXferCount = Size;
755
756 /* Check the remain data to be received */
757 while(huart->RxXferCount > 0)
758 {
759 huart->RxXferCount--;
760 if(huart->Init.WordLength == UART_WORDLENGTH_9B)
761 {
762 if(UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_RXNE, RESET, Timeout) != HAL_OK)
763 {
764 return HAL_TIMEOUT;
765 }
766 tmp = (uint16_t*) pData ;
767 if(huart->Init.Parity == UART_PARITY_NONE)
768 {
769 *tmp = (uint16_t)(huart->Instance->DR & (uint16_t)0x01FF);
770 pData +=2;
771 }
772 else
773 {
774 *tmp = (uint16_t)(huart->Instance->DR & (uint16_t)0x00FF);
775 pData +=1;
776 }
777
778 }
779 else
780 {
781 if(UART_WaitOnFlagUntilTimeout(huart, UART_FLAG_RXNE, RESET, Timeout) != HAL_OK)
782 {
783 return HAL_TIMEOUT;
784 }
785 if(huart->Init.Parity == UART_PARITY_NONE)
786 {
787 *pData++ = (uint8_t)(huart->Instance->DR & (uint8_t)0x00FF);
788 }
789 else
790 {
791 *pData++ = (uint8_t)(huart->Instance->DR & (uint8_t)0x007F);
792 }
793
794 }
795 }
796
797 /* Check if a non-blocking transmit process is ongoing or not */
798 if(huart->State == HAL_UART_STATE_BUSY_TX_RX)
799 {
800 huart->State = HAL_UART_STATE_BUSY_TX;
801 }
802 else
803 {
804 huart->State = HAL_UART_STATE_READY;
805 }
806 /* Process Unlocked */
807 __HAL_UNLOCK(huart);
808
809 return HAL_OK;
810 }
811 else
812 {
813 return HAL_BUSY;
814 }
815 }
816
817 /**
818 * @brief Sends an amount of data in non blocking mode.
819 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
820 * the configuration information for the specified UART module.
821 * @param pData: Pointer to data buffer
822 * @param Size: Amount of data to be sent
823 * @retval HAL status
824 */
HAL_UART_Transmit_IT(UART_HandleTypeDef * huart,uint8_t * pData,uint16_t Size)825 HAL_StatusTypeDef HAL_UART_Transmit_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
826 {
827 uint32_t tmp_state = 0;
828
829 tmp_state = huart->State;
830 if((tmp_state == HAL_UART_STATE_READY) || (tmp_state == HAL_UART_STATE_BUSY_RX))
831 {
832 if((pData == NULL ) || (Size == 0))
833 {
834 return HAL_ERROR;
835 }
836
837 /* Process Locked */
838 __HAL_LOCK(huart);
839
840 huart->pTxBuffPtr = pData;
841 huart->TxXferSize = Size;
842 huart->TxXferCount = Size;
843
844 huart->ErrorCode = HAL_UART_ERROR_NONE;
845 /* Check if a receive process is ongoing or not */
846 if(huart->State == HAL_UART_STATE_BUSY_RX)
847 {
848 huart->State = HAL_UART_STATE_BUSY_TX_RX;
849 }
850 else
851 {
852 huart->State = HAL_UART_STATE_BUSY_TX;
853 }
854
855 /* Process Unlocked */
856 __HAL_UNLOCK(huart);
857
858 /* Enable the UART Transmit data register empty Interrupt */
859 __HAL_UART_ENABLE_IT(huart, UART_IT_TXE);
860
861 return HAL_OK;
862 }
863 else
864 {
865 return HAL_BUSY;
866 }
867 }
868
869 /**
870 * @brief Receives an amount of data in non blocking mode
871 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
872 * the configuration information for the specified UART module.
873 * @param pData: Pointer to data buffer
874 * @param Size: Amount of data to be received
875 * @retval HAL status
876 */
HAL_UART_Receive_IT(UART_HandleTypeDef * huart,uint8_t * pData,uint16_t Size)877 HAL_StatusTypeDef HAL_UART_Receive_IT(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
878 {
879 uint32_t tmp_state = 0;
880
881 tmp_state = huart->State;
882 if((tmp_state == HAL_UART_STATE_READY) || (tmp_state == HAL_UART_STATE_BUSY_TX))
883 {
884 if((pData == NULL ) || (Size == 0))
885 {
886 return HAL_ERROR;
887 }
888
889 /* Process Locked */
890 __HAL_LOCK(huart);
891
892 huart->pRxBuffPtr = pData;
893 huart->RxXferSize = Size;
894 huart->RxXferCount = Size;
895
896 huart->ErrorCode = HAL_UART_ERROR_NONE;
897 /* Check if a transmit process is ongoing or not */
898 if(huart->State == HAL_UART_STATE_BUSY_TX)
899 {
900 huart->State = HAL_UART_STATE_BUSY_TX_RX;
901 }
902 else
903 {
904 huart->State = HAL_UART_STATE_BUSY_RX;
905 }
906
907 /* Process Unlocked */
908 __HAL_UNLOCK(huart);
909
910 /* Enable the UART Parity Error Interrupt */
911 __HAL_UART_ENABLE_IT(huart, UART_IT_PE);
912
913 /* Enable the UART Error Interrupt: (Frame error, noise error, overrun error) */
914 __HAL_UART_ENABLE_IT(huart, UART_IT_ERR);
915
916 /* Enable the UART Data Register not empty Interrupt */
917 __HAL_UART_ENABLE_IT(huart, UART_IT_RXNE);
918
919 return HAL_OK;
920 }
921 else
922 {
923 return HAL_BUSY;
924 }
925 }
926
927 /**
928 * @brief Sends an amount of data in non blocking mode.
929 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
930 * the configuration information for the specified UART module.
931 * @param pData: Pointer to data buffer
932 * @param Size: Amount of data to be sent
933 * @retval HAL status
934 */
HAL_UART_Transmit_DMA(UART_HandleTypeDef * huart,uint8_t * pData,uint16_t Size)935 HAL_StatusTypeDef HAL_UART_Transmit_DMA(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
936 {
937 uint32_t *tmp;
938 uint32_t tmp_state = 0;
939
940 tmp_state = huart->State;
941 if((tmp_state == HAL_UART_STATE_READY) || (tmp_state == HAL_UART_STATE_BUSY_RX))
942 {
943 if((pData == NULL ) || (Size == 0))
944 {
945 return HAL_ERROR;
946 }
947
948 /* Process Locked */
949 __HAL_LOCK(huart);
950
951 huart->pTxBuffPtr = pData;
952 huart->TxXferSize = Size;
953 huart->TxXferCount = Size;
954
955 huart->ErrorCode = HAL_UART_ERROR_NONE;
956 /* Check if a receive process is ongoing or not */
957 if(huart->State == HAL_UART_STATE_BUSY_RX)
958 {
959 huart->State = HAL_UART_STATE_BUSY_TX_RX;
960 }
961 else
962 {
963 huart->State = HAL_UART_STATE_BUSY_TX;
964 }
965
966 /* Set the UART DMA transfer complete callback */
967 huart->hdmatx->XferCpltCallback = UART_DMATransmitCplt;
968
969 /* Set the UART DMA Half transfer complete callback */
970 huart->hdmatx->XferHalfCpltCallback = UART_DMATxHalfCplt;
971
972 /* Set the DMA error callback */
973 huart->hdmatx->XferErrorCallback = UART_DMAError;
974
975 /* Enable the UART transmit DMA channel */
976 tmp = (uint32_t*)&pData;
977 HAL_DMA_Start_IT(huart->hdmatx, *(uint32_t*)tmp, (uint32_t)&huart->Instance->DR, Size);
978
979 /* Clear the TC flag in the SR register by writing 0 to it */
980 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
981
982 /* Enable the DMA transfer for transmit request by setting the DMAT bit
983 in the UART CR3 register */
984 SET_BIT(huart->Instance->CR3, USART_CR3_DMAT);
985
986 /* Process Unlocked */
987 __HAL_UNLOCK(huart);
988
989 return HAL_OK;
990 }
991 else
992 {
993 return HAL_BUSY;
994 }
995 }
996
997 /**
998 * @brief Receives an amount of data in non blocking mode.
999 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1000 * the configuration information for the specified UART module.
1001 * @param pData: Pointer to data buffer
1002 * @param Size: Amount of data to be received
1003 * @note When the UART parity is enabled (PCE = 1), the received data contain
1004 * the parity bit (MSB position)
1005 * @retval HAL status
1006 */
HAL_UART_Receive_DMA(UART_HandleTypeDef * huart,uint8_t * pData,uint16_t Size)1007 HAL_StatusTypeDef HAL_UART_Receive_DMA(UART_HandleTypeDef *huart, uint8_t *pData, uint16_t Size)
1008 {
1009 uint32_t *tmp;
1010 uint32_t tmp_state = 0;
1011
1012 tmp_state = huart->State;
1013 if((tmp_state == HAL_UART_STATE_READY) || (tmp_state == HAL_UART_STATE_BUSY_TX))
1014 {
1015 if((pData == NULL ) || (Size == 0))
1016 {
1017 return HAL_ERROR;
1018 }
1019
1020 /* Process Locked */
1021 __HAL_LOCK(huart);
1022
1023 huart->pRxBuffPtr = pData;
1024 huart->RxXferSize = Size;
1025
1026 huart->ErrorCode = HAL_UART_ERROR_NONE;
1027 /* Check if a transmit process is ongoing or not */
1028 if(huart->State == HAL_UART_STATE_BUSY_TX)
1029 {
1030 huart->State = HAL_UART_STATE_BUSY_TX_RX;
1031 }
1032 else
1033 {
1034 huart->State = HAL_UART_STATE_BUSY_RX;
1035 }
1036
1037 /* Set the UART DMA transfer complete callback */
1038 huart->hdmarx->XferCpltCallback = UART_DMAReceiveCplt;
1039
1040 /* Set the UART DMA Half transfer complete callback */
1041 huart->hdmarx->XferHalfCpltCallback = UART_DMARxHalfCplt;
1042
1043 /* Set the DMA error callback */
1044 huart->hdmarx->XferErrorCallback = UART_DMAError;
1045
1046 /* Enable the DMA channel */
1047 tmp = (uint32_t*)&pData;
1048 HAL_DMA_Start_IT(huart->hdmarx, (uint32_t)&huart->Instance->DR, *(uint32_t*)tmp, Size);
1049
1050 /* Enable the DMA transfer for the receiver request by setting the DMAR bit
1051 in the UART CR3 register */
1052 SET_BIT(huart->Instance->CR3, USART_CR3_DMAR);
1053
1054 /* Process Unlocked */
1055 __HAL_UNLOCK(huart);
1056
1057 return HAL_OK;
1058 }
1059 else
1060 {
1061 return HAL_BUSY;
1062 }
1063 }
1064
1065 /**
1066 * @brief Pauses the DMA Transfer.
1067 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1068 * the configuration information for the specified UART module.
1069 * @retval HAL status
1070 */
HAL_UART_DMAPause(UART_HandleTypeDef * huart)1071 HAL_StatusTypeDef HAL_UART_DMAPause(UART_HandleTypeDef *huart)
1072 {
1073 /* Process Locked */
1074 __HAL_LOCK(huart);
1075
1076 if(huart->State == HAL_UART_STATE_BUSY_TX)
1077 {
1078 /* Disable the UART DMA Tx request */
1079 CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
1080 }
1081 else if(huart->State == HAL_UART_STATE_BUSY_RX)
1082 {
1083 /* Disable the UART DMA Rx request */
1084 CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
1085 }
1086 else if (huart->State == HAL_UART_STATE_BUSY_TX_RX)
1087 {
1088 /* Disable the UART DMA Tx & Rx requests */
1089 CLEAR_BIT(huart->Instance->CR3, (USART_CR3_DMAT | USART_CR3_DMAR));
1090 }
1091 else
1092 {
1093 /* Process Unlocked */
1094 __HAL_UNLOCK(huart);
1095
1096 return HAL_ERROR;
1097 }
1098
1099 /* Process Unlocked */
1100 __HAL_UNLOCK(huart);
1101
1102 return HAL_OK;
1103 }
1104
1105 /**
1106 * @brief Resumes the DMA Transfer.
1107 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1108 * the configuration information for the specified UART module.
1109 * @retval HAL status
1110 */
HAL_UART_DMAResume(UART_HandleTypeDef * huart)1111 HAL_StatusTypeDef HAL_UART_DMAResume(UART_HandleTypeDef *huart)
1112 {
1113 /* Process Locked */
1114 __HAL_LOCK(huart);
1115
1116 if(huart->State == HAL_UART_STATE_BUSY_TX)
1117 {
1118 /* Enable the UART DMA Tx request */
1119 SET_BIT(huart->Instance->CR3, USART_CR3_DMAT);
1120 }
1121 else if(huart->State == HAL_UART_STATE_BUSY_RX)
1122 {
1123 /* Clear the Overrun flag before resumming the Rx transfer*/
1124 __HAL_UART_CLEAR_OREFLAG(huart);
1125 /* Enable the UART DMA Rx request */
1126 SET_BIT(huart->Instance->CR3, USART_CR3_DMAR);
1127 }
1128 else if(huart->State == HAL_UART_STATE_BUSY_TX_RX)
1129 {
1130 /* Clear the Overrun flag before resumming the Rx transfer*/
1131 __HAL_UART_CLEAR_OREFLAG(huart);
1132 /* Enable the UART DMA Tx & Rx request */
1133 SET_BIT(huart->Instance->CR3, (USART_CR3_DMAT | USART_CR3_DMAR));
1134 }
1135 else
1136 {
1137 /* Process Unlocked */
1138 __HAL_UNLOCK(huart);
1139
1140 return HAL_ERROR;
1141 }
1142
1143 /* Process Unlocked */
1144 __HAL_UNLOCK(huart);
1145
1146 return HAL_OK;
1147 }
1148
1149 /**
1150 * @brief Stops the DMA Transfer.
1151 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1152 * the configuration information for the specified UART module.
1153 * @retval HAL status
1154 */
HAL_UART_DMAStop(UART_HandleTypeDef * huart)1155 HAL_StatusTypeDef HAL_UART_DMAStop(UART_HandleTypeDef *huart)
1156 {
1157 /* The Lock is not implemented on this API to allow the user application
1158 to call the HAL UART API under callbacks HAL_UART_TxCpltCallback() / HAL_UART_RxCpltCallback():
1159 when calling HAL_DMA_Abort() API the DMA TX/RX Transfer complete interrupt is generated
1160 and the correspond call back is executed HAL_UART_TxCpltCallback() / HAL_UART_RxCpltCallback()
1161 */
1162
1163 /* Disable the UART Tx/Rx DMA requests */
1164 CLEAR_BIT(huart->Instance->CR3, (USART_CR3_DMAT | USART_CR3_DMAR));
1165
1166 /* Abort the UART DMA tx channel */
1167 if(huart->hdmatx != NULL)
1168 {
1169 HAL_DMA_Abort(huart->hdmatx);
1170 }
1171 /* Abort the UART DMA rx channel */
1172 if(huart->hdmarx != NULL)
1173 {
1174 HAL_DMA_Abort(huart->hdmarx);
1175 }
1176
1177 huart->State = HAL_UART_STATE_READY;
1178
1179 return HAL_OK;
1180 }
1181
1182 /**
1183 * @brief This function handles UART interrupt request.
1184 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1185 * the configuration information for the specified UART module.
1186 * @retval None
1187 */
HAL_UART_IRQHandler(UART_HandleTypeDef * huart)1188 void HAL_UART_IRQHandler(UART_HandleTypeDef *huart)
1189 {
1190 uint32_t tmp_flag = 0, tmp_it_source = 0;
1191
1192 tmp_flag = __HAL_UART_GET_FLAG(huart, UART_FLAG_PE);
1193 tmp_it_source = __HAL_UART_GET_IT_SOURCE(huart, UART_IT_PE);
1194 /* UART parity error interrupt occurred ------------------------------------*/
1195 if((tmp_flag != RESET) && (tmp_it_source != RESET))
1196 {
1197 huart->ErrorCode |= HAL_UART_ERROR_PE;
1198 }
1199
1200 tmp_flag = __HAL_UART_GET_FLAG(huart, UART_FLAG_FE);
1201 tmp_it_source = __HAL_UART_GET_IT_SOURCE(huart, UART_IT_ERR);
1202 /* UART frame error interrupt occurred -------------------------------------*/
1203 if((tmp_flag != RESET) && (tmp_it_source != RESET))
1204 {
1205 huart->ErrorCode |= HAL_UART_ERROR_FE;
1206 }
1207
1208 tmp_flag = __HAL_UART_GET_FLAG(huart, UART_FLAG_NE);
1209 /* UART noise error interrupt occurred -------------------------------------*/
1210 if((tmp_flag != RESET) && (tmp_it_source != RESET))
1211 {
1212 huart->ErrorCode |= HAL_UART_ERROR_NE;
1213 }
1214
1215 tmp_flag = __HAL_UART_GET_FLAG(huart, UART_FLAG_ORE);
1216 /* UART Over-Run interrupt occurred ----------------------------------------*/
1217 if((tmp_flag != RESET) && (tmp_it_source != RESET))
1218 {
1219 huart->ErrorCode |= HAL_UART_ERROR_ORE;
1220 }
1221
1222 tmp_flag = __HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE);
1223 tmp_it_source = __HAL_UART_GET_IT_SOURCE(huart, UART_IT_RXNE);
1224 /* UART in mode Receiver ---------------------------------------------------*/
1225 if((tmp_flag != RESET) && (tmp_it_source != RESET))
1226 {
1227 UART_Receive_IT(huart);
1228 }
1229
1230 tmp_flag = __HAL_UART_GET_FLAG(huart, UART_FLAG_TXE);
1231 tmp_it_source = __HAL_UART_GET_IT_SOURCE(huart, UART_IT_TXE);
1232 /* UART in mode Transmitter ------------------------------------------------*/
1233 if((tmp_flag != RESET) && (tmp_it_source != RESET))
1234 {
1235 UART_Transmit_IT(huart);
1236 }
1237
1238 tmp_flag = __HAL_UART_GET_FLAG(huart, UART_FLAG_TC);
1239 tmp_it_source = __HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC);
1240 /* UART in mode Transmitter end --------------------------------------------*/
1241 if((tmp_flag != RESET) && (tmp_it_source != RESET))
1242 {
1243 UART_EndTransmit_IT(huart);
1244 }
1245
1246 if(huart->ErrorCode != HAL_UART_ERROR_NONE)
1247 {
1248 /* Clear all the error flag at once */
1249 __HAL_UART_CLEAR_PEFLAG(huart);
1250
1251 /* Set the UART state ready to be able to start again the process */
1252 huart->State = HAL_UART_STATE_READY;
1253
1254 HAL_UART_ErrorCallback(huart);
1255 }
1256 }
1257
1258 /**
1259 * @brief Tx Transfer completed callbacks.
1260 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1261 * the configuration information for the specified UART module.
1262 * @retval None
1263 */
HAL_UART_TxCpltCallback(UART_HandleTypeDef * huart)1264 __weak void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart)
1265 {
1266 /* Prevent unused argument(s) compilation warning */
1267 UNUSED(huart);
1268
1269 /* NOTE: This function should not be modified, when the callback is needed,
1270 the HAL_UART_TxCpltCallback can be implemented in the user file
1271 */
1272 }
1273
1274 /**
1275 * @brief Tx Half Transfer completed callbacks.
1276 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1277 * the configuration information for the specified UART module.
1278 * @retval None
1279 */
HAL_UART_TxHalfCpltCallback(UART_HandleTypeDef * huart)1280 __weak void HAL_UART_TxHalfCpltCallback(UART_HandleTypeDef *huart)
1281 {
1282 /* Prevent unused argument(s) compilation warning */
1283 UNUSED(huart);
1284
1285 /* NOTE: This function should not be modified, when the callback is needed,
1286 the HAL_UART_TxHalfCpltCallback can be implemented in the user file
1287 */
1288 }
1289
1290 /**
1291 * @brief Rx Transfer completed callbacks.
1292 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1293 * the configuration information for the specified UART module.
1294 * @retval None
1295 */
HAL_UART_RxCpltCallback(UART_HandleTypeDef * huart)1296 __weak void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
1297 {
1298 /* Prevent unused argument(s) compilation warning */
1299 UNUSED(huart);
1300
1301 /* NOTE: This function should not be modified, when the callback is needed,
1302 the HAL_UART_RxCpltCallback can be implemented in the user file
1303 */
1304 }
1305
1306 /**
1307 * @brief Rx Half Transfer completed callbacks.
1308 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1309 * the configuration information for the specified UART module.
1310 * @retval None
1311 */
HAL_UART_RxHalfCpltCallback(UART_HandleTypeDef * huart)1312 __weak void HAL_UART_RxHalfCpltCallback(UART_HandleTypeDef *huart)
1313 {
1314 /* Prevent unused argument(s) compilation warning */
1315 UNUSED(huart);
1316
1317 /* NOTE: This function should not be modified, when the callback is needed,
1318 the HAL_UART_RxHalfCpltCallback can be implemented in the user file
1319 */
1320 }
1321
1322 /**
1323 * @brief UART error callbacks.
1324 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1325 * the configuration information for the specified UART module.
1326 * @retval None
1327 */
HAL_UART_ErrorCallback(UART_HandleTypeDef * huart)1328 __weak void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart)
1329 {
1330 /* Prevent unused argument(s) compilation warning */
1331 UNUSED(huart);
1332
1333 /* NOTE: This function should not be modified, when the callback is needed,
1334 the HAL_UART_ErrorCallback can be implemented in the user file
1335 */
1336 }
1337
1338 /**
1339 * @}
1340 */
1341
1342 /** @defgroup UART_Exported_Functions_Group3 Peripheral Control functions
1343 * @brief UART control functions
1344 *
1345 @verbatim
1346 ==============================================================================
1347 ##### Peripheral Control functions #####
1348 ==============================================================================
1349 [..]
1350 This subsection provides a set of functions allowing to control the UART:
1351 (+) HAL_LIN_SendBreak() API can be helpful to transmit the break character.
1352 (+) HAL_MultiProcessor_EnterMuteMode() API can be helpful to enter the UART in mute mode.
1353 (+) HAL_MultiProcessor_ExitMuteMode() API can be helpful to exit the UART mute mode by software.
1354 (+) HAL_HalfDuplex_EnableTransmitter() API to enable the UART transmitter and disables the UART receiver in Half Duplex mode
1355 (+) HAL_HalfDuplex_EnableReceiver() API to enable the UART receiver and disables the UART transmitter in Half Duplex mode
1356
1357 @endverbatim
1358 * @{
1359 */
1360
1361 /**
1362 * @brief Transmits break characters.
1363 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1364 * the configuration information for the specified UART module.
1365 * @retval HAL status
1366 */
HAL_LIN_SendBreak(UART_HandleTypeDef * huart)1367 HAL_StatusTypeDef HAL_LIN_SendBreak(UART_HandleTypeDef *huart)
1368 {
1369 /* Check the parameters */
1370 assert_param(IS_UART_LIN_INSTANCE(huart->Instance));
1371
1372 /* Process Locked */
1373 __HAL_LOCK(huart);
1374
1375 huart->State = HAL_UART_STATE_BUSY;
1376
1377 /* Send break characters */
1378 SET_BIT(huart->Instance->CR1, USART_CR1_SBK);
1379
1380 huart->State = HAL_UART_STATE_READY;
1381
1382 /* Process Unlocked */
1383 __HAL_UNLOCK(huart);
1384
1385 return HAL_OK;
1386 }
1387
1388 /**
1389 * @brief Enters the UART in mute mode.
1390 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1391 * the configuration information for the specified UART module.
1392 * @retval HAL status
1393 */
HAL_MultiProcessor_EnterMuteMode(UART_HandleTypeDef * huart)1394 HAL_StatusTypeDef HAL_MultiProcessor_EnterMuteMode(UART_HandleTypeDef *huart)
1395 {
1396 /* Check the parameters */
1397 assert_param(IS_UART_INSTANCE(huart->Instance));
1398
1399 /* Process Locked */
1400 __HAL_LOCK(huart);
1401
1402 huart->State = HAL_UART_STATE_BUSY;
1403
1404 /* Enable the USART mute mode by setting the RWU bit in the CR1 register */
1405 SET_BIT(huart->Instance->CR1, USART_CR1_RWU);
1406
1407 huart->State = HAL_UART_STATE_READY;
1408
1409 /* Process Unlocked */
1410 __HAL_UNLOCK(huart);
1411
1412 return HAL_OK;
1413 }
1414
1415 /**
1416 * @brief Exits the UART mute mode: wake up software.
1417 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1418 * the configuration information for the specified UART module.
1419 * @retval HAL status
1420 */
HAL_MultiProcessor_ExitMuteMode(UART_HandleTypeDef * huart)1421 HAL_StatusTypeDef HAL_MultiProcessor_ExitMuteMode(UART_HandleTypeDef *huart)
1422 {
1423 /* Check the parameters */
1424 assert_param(IS_UART_INSTANCE(huart->Instance));
1425
1426 /* Process Locked */
1427 __HAL_LOCK(huart);
1428
1429 huart->State = HAL_UART_STATE_BUSY;
1430
1431 /* Disable the USART mute mode by clearing the RWU bit in the CR1 register */
1432 CLEAR_BIT(huart->Instance->CR1, USART_CR1_RWU);
1433
1434 huart->State = HAL_UART_STATE_READY;
1435
1436 /* Process Unlocked */
1437 __HAL_UNLOCK(huart);
1438
1439 return HAL_OK;
1440 }
1441
1442 /**
1443 * @brief Enables the UART transmitter and disables the UART receiver.
1444 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1445 * the configuration information for the specified UART module.
1446 * @retval HAL status
1447 */
HAL_HalfDuplex_EnableTransmitter(UART_HandleTypeDef * huart)1448 HAL_StatusTypeDef HAL_HalfDuplex_EnableTransmitter(UART_HandleTypeDef *huart)
1449 {
1450 /* Process Locked */
1451 __HAL_LOCK(huart);
1452
1453 huart->State = HAL_UART_STATE_BUSY;
1454
1455 /*-------------------------- USART CR1 Configuration -----------------------*/
1456 /* Clear TE and RE bits */
1457 /* Enable the USART's transmit interface by setting the TE bit in the USART CR1 register */
1458 MODIFY_REG(huart->Instance->CR1, (uint32_t)(USART_CR1_TE | USART_CR1_RE), USART_CR1_TE);
1459
1460 huart->State = HAL_UART_STATE_READY;
1461
1462 /* Process Unlocked */
1463 __HAL_UNLOCK(huart);
1464
1465 return HAL_OK;
1466 }
1467
1468 /**
1469 * @brief Enables the UART receiver and disables the UART transmitter.
1470 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1471 * the configuration information for the specified UART module.
1472 * @retval HAL status
1473 */
HAL_HalfDuplex_EnableReceiver(UART_HandleTypeDef * huart)1474 HAL_StatusTypeDef HAL_HalfDuplex_EnableReceiver(UART_HandleTypeDef *huart)
1475 {
1476 /* Process Locked */
1477 __HAL_LOCK(huart);
1478
1479 huart->State = HAL_UART_STATE_BUSY;
1480
1481 /*-------------------------- USART CR1 Configuration -----------------------*/
1482 /* Clear TE and RE bits */
1483 /* Enable the USART's receive interface by setting the RE bit in the USART CR1 register */
1484 MODIFY_REG(huart->Instance->CR1, (uint32_t)(USART_CR1_TE | USART_CR1_RE), USART_CR1_RE);
1485
1486 huart->State = HAL_UART_STATE_READY;
1487
1488 /* Process Unlocked */
1489 __HAL_UNLOCK(huart);
1490
1491 return HAL_OK;
1492 }
1493
1494 /**
1495 * @}
1496 */
1497
1498 /** @defgroup UART_Exported_Functions_Group4 Peripheral State and Errors functions
1499 * @brief UART State and Errors functions
1500 *
1501 @verbatim
1502 ==============================================================================
1503 ##### Peripheral State and Errors functions #####
1504 ==============================================================================
1505 [..]
1506 This subsection provides a set of functions allowing to return the State of
1507 UART communication process, return Peripheral Errors occurred during communication
1508 process
1509 (+) HAL_UART_GetState() API can be helpful to check in run-time the state of the UART peripheral.
1510 (+) HAL_UART_GetError() check in run-time errors that could be occurred during communication.
1511
1512 @endverbatim
1513 * @{
1514 */
1515
1516 /**
1517 * @brief Returns the UART state.
1518 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1519 * the configuration information for the specified UART module.
1520 * @retval HAL state
1521 */
HAL_UART_GetState(UART_HandleTypeDef * huart)1522 HAL_UART_StateTypeDef HAL_UART_GetState(UART_HandleTypeDef *huart)
1523 {
1524 return huart->State;
1525 }
1526
1527 /**
1528 * @brief Return the UART error code
1529 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1530 * the configuration information for the specified UART.
1531 * @retval UART Error Code
1532 */
HAL_UART_GetError(UART_HandleTypeDef * huart)1533 uint32_t HAL_UART_GetError(UART_HandleTypeDef *huart)
1534 {
1535 return huart->ErrorCode;
1536 }
1537
1538 /**
1539 * @}
1540 */
1541
1542 /**
1543 * @}
1544 */
1545
1546 /** @defgroup UART_Private_Functions UART Private Functions
1547 * @brief UART Private functions
1548 * @{
1549 */
1550 /**
1551 * @brief DMA UART transmit process complete callback.
1552 * @param hdma: Pointer to a DMA_HandleTypeDef structure that contains
1553 * the configuration information for the specified DMA module.
1554 * @retval None
1555 */
UART_DMATransmitCplt(DMA_HandleTypeDef * hdma)1556 static void UART_DMATransmitCplt(DMA_HandleTypeDef *hdma)
1557 {
1558 UART_HandleTypeDef* huart = ( UART_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
1559 /* DMA Normal mode*/
1560 if ( HAL_IS_BIT_CLR(hdma->Instance->CCR, DMA_CCR_CIRC) )
1561 {
1562 huart->TxXferCount = 0;
1563
1564 /* Disable the DMA transfer for transmit request by setting the DMAT bit
1565 in the UART CR3 register */
1566 CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAT);
1567
1568 /* Enable the UART Transmit Complete Interrupt */
1569 __HAL_UART_ENABLE_IT(huart, UART_IT_TC);
1570 }
1571 /* DMA Circular mode */
1572 else
1573 {
1574 HAL_UART_TxCpltCallback(huart);
1575 }
1576 }
1577
1578 /**
1579 * @brief DMA UART transmit process half complete callback
1580 * @param hdma: Pointer to a DMA_HandleTypeDef structure that contains
1581 * the configuration information for the specified DMA module.
1582 * @retval None
1583 */
UART_DMATxHalfCplt(DMA_HandleTypeDef * hdma)1584 static void UART_DMATxHalfCplt(DMA_HandleTypeDef *hdma)
1585 {
1586 UART_HandleTypeDef* huart = (UART_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent;
1587
1588 HAL_UART_TxHalfCpltCallback(huart);
1589 }
1590
1591 /**
1592 * @brief DMA UART receive process complete callback.
1593 * @param hdma: Pointer to a DMA_HandleTypeDef structure that contains
1594 * the configuration information for the specified DMA module.
1595 * @retval None
1596 */
UART_DMAReceiveCplt(DMA_HandleTypeDef * hdma)1597 static void UART_DMAReceiveCplt(DMA_HandleTypeDef *hdma)
1598 {
1599 UART_HandleTypeDef* huart = ( UART_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
1600 /* DMA Normal mode*/
1601 if ( HAL_IS_BIT_CLR(hdma->Instance->CCR, DMA_CCR_CIRC) )
1602 {
1603 huart->RxXferCount = 0;
1604
1605 /* Disable the DMA transfer for the receiver request by setting the DMAR bit
1606 in the UART CR3 register */
1607 CLEAR_BIT(huart->Instance->CR3, USART_CR3_DMAR);
1608
1609 /* Check if a transmit process is ongoing or not */
1610 if(huart->State == HAL_UART_STATE_BUSY_TX_RX)
1611 {
1612 huart->State = HAL_UART_STATE_BUSY_TX;
1613 }
1614 else
1615 {
1616 huart->State = HAL_UART_STATE_READY;
1617 }
1618 }
1619 HAL_UART_RxCpltCallback(huart);
1620 }
1621
1622 /**
1623 * @brief DMA UART receive process half complete callback
1624 * @param hdma: Pointer to a DMA_HandleTypeDef structure that contains
1625 * the configuration information for the specified DMA module.
1626 * @retval None
1627 */
UART_DMARxHalfCplt(DMA_HandleTypeDef * hdma)1628 static void UART_DMARxHalfCplt(DMA_HandleTypeDef *hdma)
1629 {
1630 UART_HandleTypeDef* huart = (UART_HandleTypeDef*)((DMA_HandleTypeDef*)hdma)->Parent;
1631
1632 HAL_UART_RxHalfCpltCallback(huart);
1633 }
1634
1635 /**
1636 * @brief DMA UART communication error callback.
1637 * @param hdma: Pointer to a DMA_HandleTypeDef structure that contains
1638 * the configuration information for the specified DMA module.
1639 * @retval None
1640 */
UART_DMAError(DMA_HandleTypeDef * hdma)1641 static void UART_DMAError(DMA_HandleTypeDef *hdma)
1642 {
1643 UART_HandleTypeDef* huart = ( UART_HandleTypeDef* )((DMA_HandleTypeDef* )hdma)->Parent;
1644 huart->RxXferCount = 0;
1645 huart->TxXferCount = 0;
1646 huart->State= HAL_UART_STATE_READY;
1647 huart->ErrorCode |= HAL_UART_ERROR_DMA;
1648 HAL_UART_ErrorCallback(huart);
1649 }
1650
1651 /**
1652 * @brief This function handles UART Communication Timeout.
1653 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1654 * the configuration information for the specified UART module.
1655 * @param Flag: specifies the UART flag to check.
1656 * @param Status: The new Flag status (SET or RESET).
1657 * @param Timeout: Timeout duration
1658 * @retval HAL status
1659 */
UART_WaitOnFlagUntilTimeout(UART_HandleTypeDef * huart,uint32_t Flag,FlagStatus Status,uint32_t Timeout)1660 static HAL_StatusTypeDef UART_WaitOnFlagUntilTimeout(UART_HandleTypeDef *huart, uint32_t Flag, FlagStatus Status, uint32_t Timeout)
1661 {
1662 uint32_t tickstart = 0;
1663
1664 /* Get tick */
1665 tickstart = HAL_GetTick();
1666
1667 /* Wait until flag is set */
1668 if(Status == RESET)
1669 {
1670 while(__HAL_UART_GET_FLAG(huart, Flag) == RESET)
1671 {
1672 /* Check for the Timeout */
1673 if(Timeout != HAL_MAX_DELAY)
1674 {
1675 if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
1676 {
1677 /* Disable TXE, RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts for the interrupt process */
1678 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
1679 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
1680 __HAL_UART_DISABLE_IT(huart, UART_IT_PE);
1681 __HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
1682
1683 huart->State= HAL_UART_STATE_READY;
1684
1685 /* Process Unlocked */
1686 __HAL_UNLOCK(huart);
1687
1688 return HAL_TIMEOUT;
1689 }
1690 }
1691 }
1692 }
1693 else
1694 {
1695 while(__HAL_UART_GET_FLAG(huart, Flag) != RESET)
1696 {
1697 /* Check for the Timeout */
1698 if(Timeout != HAL_MAX_DELAY)
1699 {
1700 if((Timeout == 0)||((HAL_GetTick() - tickstart ) > Timeout))
1701 {
1702 /* Disable TXE, RXNE, PE and ERR (Frame error, noise error, overrun error) interrupts for the interrupt process */
1703 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
1704 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
1705 __HAL_UART_DISABLE_IT(huart, UART_IT_PE);
1706 __HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
1707
1708 huart->State= HAL_UART_STATE_READY;
1709
1710 /* Process Unlocked */
1711 __HAL_UNLOCK(huart);
1712
1713 return HAL_TIMEOUT;
1714 }
1715 }
1716 }
1717 }
1718 return HAL_OK;
1719 }
1720
1721 /**
1722 * @brief Sends an amount of data in non blocking mode.
1723 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1724 * the configuration information for the specified UART module.
1725 * @retval HAL status
1726 */
UART_Transmit_IT(UART_HandleTypeDef * huart)1727 static HAL_StatusTypeDef UART_Transmit_IT(UART_HandleTypeDef *huart)
1728 {
1729 uint16_t* tmp;
1730 uint32_t tmp_state = 0;
1731
1732 tmp_state = huart->State;
1733 if((tmp_state == HAL_UART_STATE_BUSY_TX) || (tmp_state == HAL_UART_STATE_BUSY_TX_RX))
1734 {
1735 if(huart->Init.WordLength == UART_WORDLENGTH_9B)
1736 {
1737 tmp = (uint16_t*) huart->pTxBuffPtr;
1738 huart->Instance->DR = (uint16_t)(*tmp & (uint16_t)0x01FF);
1739 if(huart->Init.Parity == UART_PARITY_NONE)
1740 {
1741 huart->pTxBuffPtr += 2;
1742 }
1743 else
1744 {
1745 huart->pTxBuffPtr += 1;
1746 }
1747 }
1748 else
1749 {
1750 huart->Instance->DR = (uint8_t)(*huart->pTxBuffPtr++ & (uint8_t)0x00FF);
1751 }
1752
1753 if(--huart->TxXferCount == 0)
1754 {
1755 /* Disable the UART Transmit Complete Interrupt */
1756 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
1757
1758 /* Enable the UART Transmit Complete Interrupt */
1759 __HAL_UART_ENABLE_IT(huart, UART_IT_TC);
1760 }
1761 return HAL_OK;
1762 }
1763 else
1764 {
1765 return HAL_BUSY;
1766 }
1767 }
1768
1769
1770 /**
1771 * @brief Wraps up transmission in non blocking mode.
1772 * @param huart: pointer to a UART_HandleTypeDef structure that contains
1773 * the configuration information for the specified UART module.
1774 * @retval HAL status
1775 */
UART_EndTransmit_IT(UART_HandleTypeDef * huart)1776 static HAL_StatusTypeDef UART_EndTransmit_IT(UART_HandleTypeDef *huart)
1777 {
1778 /* Disable the UART Transmit Complete Interrupt */
1779 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
1780
1781 /* Check if a receive process is ongoing or not */
1782 if(huart->State == HAL_UART_STATE_BUSY_TX_RX)
1783 {
1784 huart->State = HAL_UART_STATE_BUSY_RX;
1785 }
1786 else
1787 {
1788 huart->State = HAL_UART_STATE_READY;
1789 }
1790
1791 HAL_UART_TxCpltCallback(huart);
1792
1793 return HAL_OK;
1794 }
1795
1796 /**
1797 * @brief Receives an amount of data in non blocking mode
1798 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1799 * the configuration information for the specified UART module.
1800 * @retval HAL status
1801 */
UART_Receive_IT(UART_HandleTypeDef * huart)1802 static HAL_StatusTypeDef UART_Receive_IT(UART_HandleTypeDef *huart)
1803 {
1804 uint16_t* tmp;
1805 uint32_t tmp_state = 0;
1806
1807 tmp_state = huart->State;
1808 if((tmp_state == HAL_UART_STATE_BUSY_RX) || (tmp_state == HAL_UART_STATE_BUSY_TX_RX))
1809 {
1810 if(huart->Init.WordLength == UART_WORDLENGTH_9B)
1811 {
1812 tmp = (uint16_t*) huart->pRxBuffPtr;
1813 if(huart->Init.Parity == UART_PARITY_NONE)
1814 {
1815 *tmp = (uint16_t)(huart->Instance->DR & (uint16_t)0x01FF);
1816 huart->pRxBuffPtr += 2;
1817 }
1818 else
1819 {
1820 *tmp = (uint16_t)(huart->Instance->DR & (uint16_t)0x00FF);
1821 huart->pRxBuffPtr += 1;
1822 }
1823 }
1824 else
1825 {
1826 if(huart->Init.Parity == UART_PARITY_NONE)
1827 {
1828 *huart->pRxBuffPtr++ = (uint8_t)(huart->Instance->DR & (uint8_t)0x00FF);
1829 }
1830 else
1831 {
1832 *huart->pRxBuffPtr++ = (uint8_t)(huart->Instance->DR & (uint8_t)0x007F);
1833 }
1834 }
1835
1836 if(--huart->RxXferCount == 0)
1837 {
1838 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
1839
1840 /* Check if a transmit process is ongoing or not */
1841 if(huart->State == HAL_UART_STATE_BUSY_TX_RX)
1842 {
1843 huart->State = HAL_UART_STATE_BUSY_TX;
1844 }
1845 else
1846 {
1847 /* Disable the UART Parity Error Interrupt */
1848 __HAL_UART_DISABLE_IT(huart, UART_IT_PE);
1849
1850 /* Disable the UART Error Interrupt: (Frame error, noise error, overrun error) */
1851 __HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
1852
1853 huart->State = HAL_UART_STATE_READY;
1854 }
1855 HAL_UART_RxCpltCallback(huart);
1856
1857 return HAL_OK;
1858 }
1859 return HAL_OK;
1860 }
1861 else
1862 {
1863 return HAL_BUSY;
1864 }
1865 }
1866
1867 /**
1868 * @brief Configures the UART peripheral.
1869 * @param huart: Pointer to a UART_HandleTypeDef structure that contains
1870 * the configuration information for the specified UART module.
1871 * @retval None
1872 */
UART_SetConfig(UART_HandleTypeDef * huart)1873 static void UART_SetConfig(UART_HandleTypeDef *huart)
1874 {
1875 uint32_t tmpreg = 0x00;
1876
1877 /* Check the parameters */
1878 assert_param(IS_UART_BAUDRATE(huart->Init.BaudRate));
1879 assert_param(IS_UART_STOPBITS(huart->Init.StopBits));
1880 assert_param(IS_UART_PARITY(huart->Init.Parity));
1881 assert_param(IS_UART_MODE(huart->Init.Mode));
1882
1883 /*------- UART-associated USART registers setting : CR2 Configuration ------*/
1884 /* Configure the UART Stop Bits: Set STOP[13:12] bits according
1885 * to huart->Init.StopBits value */
1886 MODIFY_REG(huart->Instance->CR2, USART_CR2_STOP, huart->Init.StopBits);
1887
1888 /*------- UART-associated USART registers setting : CR1 Configuration ------*/
1889 /* Configure the UART Word Length, Parity and mode:
1890 Set the M bits according to huart->Init.WordLength value
1891 Set PCE and PS bits according to huart->Init.Parity value
1892 Set TE and RE bits according to huart->Init.Mode value
1893 Set OVER8 bit according to huart->Init.OverSampling value */
1894 tmpreg = (uint32_t)huart->Init.WordLength | huart->Init.Parity | huart->Init.Mode | huart->Init.OverSampling;
1895 MODIFY_REG(huart->Instance->CR1,
1896 (uint32_t)(USART_CR1_M | USART_CR1_PCE | USART_CR1_PS | USART_CR1_TE | USART_CR1_RE | USART_CR1_OVER8),
1897 tmpreg);
1898
1899 /*------- UART-associated USART registers setting : CR3 Configuration ------*/
1900 /* Configure the UART HFC: Set CTSE and RTSE bits according to huart->Init.HwFlowCtl value */
1901 MODIFY_REG(huart->Instance->CR3, (USART_CR3_RTSE | USART_CR3_CTSE), huart->Init.HwFlowCtl);
1902
1903 /* Check the Over Sampling */
1904 if(huart->Init.OverSampling == UART_OVERSAMPLING_8)
1905 {
1906 /*------- UART-associated USART registers setting : BRR Configuration ------*/
1907 if((huart->Instance == USART1))
1908 {
1909 huart->Instance->BRR = UART_BRR_SAMPLING8(HAL_RCC_GetPCLK2Freq(), huart->Init.BaudRate);
1910 }
1911 else
1912 {
1913 huart->Instance->BRR = UART_BRR_SAMPLING8(HAL_RCC_GetPCLK1Freq(), huart->Init.BaudRate);
1914 }
1915 }
1916 else
1917 {
1918 /*------- UART-associated USART registers setting : BRR Configuration ------*/
1919 if((huart->Instance == USART1))
1920 {
1921 huart->Instance->BRR = UART_BRR_SAMPLING16(HAL_RCC_GetPCLK2Freq(), huart->Init.BaudRate);
1922 }
1923 else
1924 {
1925 huart->Instance->BRR = UART_BRR_SAMPLING16(HAL_RCC_GetPCLK1Freq(), huart->Init.BaudRate);
1926 }
1927 }
1928 }
1929 /**
1930 * @}
1931 */
1932
1933 #endif /* HAL_UART_MODULE_ENABLED */
1934 /**
1935 * @}
1936 */
1937
1938 /**
1939 * @}
1940 */
1941
1942 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
1943
