1 /*
2 * Copyright (c) 2015-2016, Freescale Semiconductor, Inc.
3 * Copyright 2016-2017 NXP
4 * All rights reserved.
5 *
6 * SPDX-License-Identifier: BSD-3-Clause
7 */
8
9 #ifndef _FSL_FLEXIO_UART_H_
10 #define _FSL_FLEXIO_UART_H_
11
12 #include "fsl_common.h"
13 #include "fsl_flexio.h"
14
15 /*!
16 * @addtogroup flexio_uart
17 * @{
18 */
19
20 /*******************************************************************************
21 * Definitions
22 ******************************************************************************/
23
24 /*! @name Driver version */
25 /*@{*/
26 /*! @brief FlexIO UART driver version 2.1.2. */
27 #define FSL_FLEXIO_UART_DRIVER_VERSION (MAKE_VERSION(2, 1, 2))
28 /*@}*/
29
30 /*! @brief Error codes for the UART driver. */
31 enum _flexio_uart_status
32 {
33 kStatus_FLEXIO_UART_TxBusy = MAKE_STATUS(kStatusGroup_FLEXIO_UART, 0), /*!< Transmitter is busy. */
34 kStatus_FLEXIO_UART_RxBusy = MAKE_STATUS(kStatusGroup_FLEXIO_UART, 1), /*!< Receiver is busy. */
35 kStatus_FLEXIO_UART_TxIdle = MAKE_STATUS(kStatusGroup_FLEXIO_UART, 2), /*!< UART transmitter is idle. */
36 kStatus_FLEXIO_UART_RxIdle = MAKE_STATUS(kStatusGroup_FLEXIO_UART, 3), /*!< UART receiver is idle. */
37 kStatus_FLEXIO_UART_ERROR = MAKE_STATUS(kStatusGroup_FLEXIO_UART, 4), /*!< ERROR happens on UART. */
38 kStatus_FLEXIO_UART_RxRingBufferOverrun =
39 MAKE_STATUS(kStatusGroup_FLEXIO_UART, 5), /*!< UART RX software ring buffer overrun. */
40 kStatus_FLEXIO_UART_RxHardwareOverrun = MAKE_STATUS(kStatusGroup_FLEXIO_UART, 6) /*!< UART RX receiver overrun. */
41 };
42
43 /*! @brief FlexIO UART bit count per char. */
44 typedef enum _flexio_uart_bit_count_per_char
45 {
46 kFLEXIO_UART_7BitsPerChar = 7U, /*!< 7-bit data characters */
47 kFLEXIO_UART_8BitsPerChar = 8U, /*!< 8-bit data characters */
48 kFLEXIO_UART_9BitsPerChar = 9U, /*!< 9-bit data characters */
49 } flexio_uart_bit_count_per_char_t;
50
51 /*! @brief Define FlexIO UART interrupt mask. */
52 enum _flexio_uart_interrupt_enable
53 {
54 kFLEXIO_UART_TxDataRegEmptyInterruptEnable = 0x1U, /*!< Transmit buffer empty interrupt enable. */
55 kFLEXIO_UART_RxDataRegFullInterruptEnable = 0x2U, /*!< Receive buffer full interrupt enable. */
56 };
57
58 /*! @brief Define FlexIO UART status mask. */
59 enum _flexio_uart_status_flags
60 {
61 kFLEXIO_UART_TxDataRegEmptyFlag = 0x1U, /*!< Transmit buffer empty flag. */
62 kFLEXIO_UART_RxDataRegFullFlag = 0x2U, /*!< Receive buffer full flag. */
63 kFLEXIO_UART_RxOverRunFlag = 0x4U, /*!< Receive buffer over run flag. */
64 };
65
66 /*! @brief Define FlexIO UART access structure typedef. */
67 typedef struct _flexio_uart_type
68 {
69 FLEXIO_Type *flexioBase; /*!< FlexIO base pointer. */
70 uint8_t TxPinIndex; /*!< Pin select for UART_Tx. */
71 uint8_t RxPinIndex; /*!< Pin select for UART_Rx. */
72 uint8_t shifterIndex[2]; /*!< Shifter index used in FlexIO UART. */
73 uint8_t timerIndex[2]; /*!< Timer index used in FlexIO UART. */
74 } FLEXIO_UART_Type;
75
76 /*! @brief Define FlexIO UART user configuration structure. */
77 typedef struct _flexio_uart_config
78 {
79 bool enableUart; /*!< Enable/disable FlexIO UART TX & RX. */
80 bool enableInDoze; /*!< Enable/disable FlexIO operation in doze mode*/
81 bool enableInDebug; /*!< Enable/disable FlexIO operation in debug mode*/
82 bool enableFastAccess; /*!< Enable/disable fast access to FlexIO registers,
83 fast access requires the FlexIO clock to be at least
84 twice the frequency of the bus clock. */
85 uint32_t baudRate_Bps; /*!< Baud rate in Bps. */
86 flexio_uart_bit_count_per_char_t bitCountPerChar; /*!< number of bits, 7/8/9 -bit */
87 } flexio_uart_config_t;
88
89 /*! @brief Define FlexIO UART transfer structure. */
90 typedef struct _flexio_uart_transfer
91 {
92 uint8_t *data; /*!< Transfer buffer*/
93 size_t dataSize; /*!< Transfer size*/
94 } flexio_uart_transfer_t;
95
96 /* Forward declaration of the handle typedef. */
97 typedef struct _flexio_uart_handle flexio_uart_handle_t;
98
99 /*! @brief FlexIO UART transfer callback function. */
100 typedef void (*flexio_uart_transfer_callback_t)(FLEXIO_UART_Type *base,
101 flexio_uart_handle_t *handle,
102 status_t status,
103 void *userData);
104
105 /*! @brief Define FLEXIO UART handle structure*/
106 struct _flexio_uart_handle
107 {
108 uint8_t *volatile txData; /*!< Address of remaining data to send. */
109 volatile size_t txDataSize; /*!< Size of the remaining data to send. */
110 uint8_t *volatile rxData; /*!< Address of remaining data to receive. */
111 volatile size_t rxDataSize; /*!< Size of the remaining data to receive. */
112 size_t txDataSizeAll; /*!< Total bytes to be sent. */
113 size_t rxDataSizeAll; /*!< Total bytes to be received. */
114
115 uint8_t *rxRingBuffer; /*!< Start address of the receiver ring buffer. */
116 size_t rxRingBufferSize; /*!< Size of the ring buffer. */
117 volatile uint16_t rxRingBufferHead; /*!< Index for the driver to store received data into ring buffer. */
118 volatile uint16_t rxRingBufferTail; /*!< Index for the user to get data from the ring buffer. */
119
120 flexio_uart_transfer_callback_t callback; /*!< Callback function. */
121 void *userData; /*!< UART callback function parameter.*/
122
123 volatile uint8_t txState; /*!< TX transfer state. */
124 volatile uint8_t rxState; /*!< RX transfer state */
125 };
126
127 /*******************************************************************************
128 * API
129 ******************************************************************************/
130
131 #if defined(__cplusplus)
132 extern "C" {
133 #endif /*_cplusplus*/
134
135 /*!
136 * @name Initialization and deinitialization
137 * @{
138 */
139
140 /*!
141 * @brief Ungates the FlexIO clock, resets the FlexIO module, configures FlexIO UART
142 * hardware, and configures the FlexIO UART with FlexIO UART configuration.
143 * The configuration structure can be filled by the user or be set with
144 * default values by FLEXIO_UART_GetDefaultConfig().
145 *
146 * Example
147 @code
148 FLEXIO_UART_Type base = {
149 .flexioBase = FLEXIO,
150 .TxPinIndex = 0,
151 .RxPinIndex = 1,
152 .shifterIndex = {0,1},
153 .timerIndex = {0,1}
154 };
155 flexio_uart_config_t config = {
156 .enableInDoze = false,
157 .enableInDebug = true,
158 .enableFastAccess = false,
159 .baudRate_Bps = 115200U,
160 .bitCountPerChar = 8
161 };
162 FLEXIO_UART_Init(base, &config, srcClock_Hz);
163 @endcode
164 *
165 * @param base Pointer to the FLEXIO_UART_Type structure.
166 * @param userConfig Pointer to the flexio_uart_config_t structure.
167 * @param srcClock_Hz FlexIO source clock in Hz.
168 * @retval kStatus_Success Configuration success
169 * @retval kStatus_InvalidArgument Buadrate configuration out of range
170 */
171 status_t FLEXIO_UART_Init(FLEXIO_UART_Type *base, const flexio_uart_config_t *userConfig, uint32_t srcClock_Hz);
172
173 /*!
174 * @brief Disables the FlexIO UART and gates the FlexIO clock.
175 *
176 * @note After calling this API, call the FLEXO_UART_Init to use the FlexIO UART module.
177 *
178 * @param base Pointer to FLEXIO_UART_Type structure
179 */
180 void FLEXIO_UART_Deinit(FLEXIO_UART_Type *base);
181
182 /*!
183 * @brief Gets the default configuration to configure the FlexIO UART. The configuration
184 * can be used directly for calling the FLEXIO_UART_Init().
185 * Example:
186 @code
187 flexio_uart_config_t config;
188 FLEXIO_UART_GetDefaultConfig(&userConfig);
189 @endcode
190 * @param userConfig Pointer to the flexio_uart_config_t structure.
191 */
192 void FLEXIO_UART_GetDefaultConfig(flexio_uart_config_t *userConfig);
193
194 /* @} */
195
196 /*!
197 * @name Status
198 * @{
199 */
200
201 /*!
202 * @brief Gets the FlexIO UART status flags.
203 *
204 * @param base Pointer to the FLEXIO_UART_Type structure.
205 * @return FlexIO UART status flags.
206 */
207
208 uint32_t FLEXIO_UART_GetStatusFlags(FLEXIO_UART_Type *base);
209
210 /*!
211 * @brief Gets the FlexIO UART status flags.
212 *
213 * @param base Pointer to the FLEXIO_UART_Type structure.
214 * @param mask Status flag.
215 * The parameter can be any combination of the following values:
216 * @arg kFLEXIO_UART_TxDataRegEmptyFlag
217 * @arg kFLEXIO_UART_RxEmptyFlag
218 * @arg kFLEXIO_UART_RxOverRunFlag
219 */
220
221 void FLEXIO_UART_ClearStatusFlags(FLEXIO_UART_Type *base, uint32_t mask);
222
223 /* @} */
224
225 /*!
226 * @name Interrupts
227 * @{
228 */
229
230 /*!
231 * @brief Enables the FlexIO UART interrupt.
232 *
233 * This function enables the FlexIO UART interrupt.
234 *
235 * @param base Pointer to the FLEXIO_UART_Type structure.
236 * @param mask Interrupt source.
237 */
238 void FLEXIO_UART_EnableInterrupts(FLEXIO_UART_Type *base, uint32_t mask);
239
240 /*!
241 * @brief Disables the FlexIO UART interrupt.
242 *
243 * This function disables the FlexIO UART interrupt.
244 *
245 * @param base Pointer to the FLEXIO_UART_Type structure.
246 * @param mask Interrupt source.
247 */
248 void FLEXIO_UART_DisableInterrupts(FLEXIO_UART_Type *base, uint32_t mask);
249
250 /* @} */
251
252 /*!
253 * @name DMA Control
254 * @{
255 */
256
257 /*!
258 * @brief Gets the FlexIO UARt transmit data register address.
259 *
260 * This function returns the UART data register address, which is mainly used by DMA/eDMA.
261 *
262 * @param base Pointer to the FLEXIO_UART_Type structure.
263 * @return FlexIO UART transmit data register address.
264 */
FLEXIO_UART_GetTxDataRegisterAddress(FLEXIO_UART_Type * base)265 static inline uint32_t FLEXIO_UART_GetTxDataRegisterAddress(FLEXIO_UART_Type *base)
266 {
267 return FLEXIO_GetShifterBufferAddress(base->flexioBase, kFLEXIO_ShifterBuffer, base->shifterIndex[0]);
268 }
269
270 /*!
271 * @brief Gets the FlexIO UART receive data register address.
272 *
273 * This function returns the UART data register address, which is mainly used by DMA/eDMA.
274 *
275 * @param base Pointer to the FLEXIO_UART_Type structure.
276 * @return FlexIO UART receive data register address.
277 */
FLEXIO_UART_GetRxDataRegisterAddress(FLEXIO_UART_Type * base)278 static inline uint32_t FLEXIO_UART_GetRxDataRegisterAddress(FLEXIO_UART_Type *base)
279 {
280 return FLEXIO_GetShifterBufferAddress(base->flexioBase, kFLEXIO_ShifterBufferByteSwapped, base->shifterIndex[1]);
281 }
282
283 /*!
284 * @brief Enables/disables the FlexIO UART transmit DMA.
285 * This function enables/disables the FlexIO UART Tx DMA,
286 * which means asserting the kFLEXIO_UART_TxDataRegEmptyFlag does/doesn't trigger the DMA request.
287 *
288 * @param base Pointer to the FLEXIO_UART_Type structure.
289 * @param enable True to enable, false to disable.
290 */
FLEXIO_UART_EnableTxDMA(FLEXIO_UART_Type * base,bool enable)291 static inline void FLEXIO_UART_EnableTxDMA(FLEXIO_UART_Type *base, bool enable)
292 {
293 FLEXIO_EnableShifterStatusDMA(base->flexioBase, 1 << base->shifterIndex[0], enable);
294 }
295
296 /*!
297 * @brief Enables/disables the FlexIO UART receive DMA.
298 * This function enables/disables the FlexIO UART Rx DMA,
299 * which means asserting kFLEXIO_UART_RxDataRegFullFlag does/doesn't trigger the DMA request.
300 *
301 * @param base Pointer to the FLEXIO_UART_Type structure.
302 * @param enable True to enable, false to disable.
303 */
FLEXIO_UART_EnableRxDMA(FLEXIO_UART_Type * base,bool enable)304 static inline void FLEXIO_UART_EnableRxDMA(FLEXIO_UART_Type *base, bool enable)
305 {
306 FLEXIO_EnableShifterStatusDMA(base->flexioBase, 1 << base->shifterIndex[1], enable);
307 }
308
309 /* @} */
310
311 /*!
312 * @name Bus Operations
313 * @{
314 */
315
316 /*!
317 * @brief Enables/disables the FlexIO UART module operation.
318 *
319 * @param base Pointer to the FLEXIO_UART_Type.
320 * @param enable True to enable, false to disable.
321 */
FLEXIO_UART_Enable(FLEXIO_UART_Type * base,bool enable)322 static inline void FLEXIO_UART_Enable(FLEXIO_UART_Type *base, bool enable)
323 {
324 if (enable)
325 {
326 base->flexioBase->CTRL |= FLEXIO_CTRL_FLEXEN_MASK;
327 }
328 else
329 {
330 base->flexioBase->CTRL &= ~FLEXIO_CTRL_FLEXEN_MASK;
331 }
332 }
333
334 /*!
335 * @brief Writes one byte of data.
336 *
337 * @note This is a non-blocking API, which returns directly after the data is put into the
338 * data register. Ensure that the TxEmptyFlag is asserted before calling
339 * this API.
340 *
341 * @param base Pointer to the FLEXIO_UART_Type structure.
342 * @param buffer The data bytes to send.
343 */
FLEXIO_UART_WriteByte(FLEXIO_UART_Type * base,const uint8_t * buffer)344 static inline void FLEXIO_UART_WriteByte(FLEXIO_UART_Type *base, const uint8_t *buffer)
345 {
346 base->flexioBase->SHIFTBUF[base->shifterIndex[0]] = *buffer;
347 }
348
349 /*!
350 * @brief Reads one byte of data.
351 *
352 * @note This is a non-blocking API, which returns directly after the data is read from the
353 * data register. Ensure that the RxFullFlag is asserted before calling this API.
354 *
355 * @param base Pointer to the FLEXIO_UART_Type structure.
356 * @param buffer The buffer to store the received bytes.
357 */
FLEXIO_UART_ReadByte(FLEXIO_UART_Type * base,uint8_t * buffer)358 static inline void FLEXIO_UART_ReadByte(FLEXIO_UART_Type *base, uint8_t *buffer)
359 {
360 *buffer = base->flexioBase->SHIFTBUFBYS[base->shifterIndex[1]];
361 }
362
363 /*!
364 * @brief Sends a buffer of data bytes.
365 *
366 * @note This function blocks using the polling method until all bytes have been sent.
367 *
368 * @param base Pointer to the FLEXIO_UART_Type structure.
369 * @param txData The data bytes to send.
370 * @param txSize The number of data bytes to send.
371 */
372 void FLEXIO_UART_WriteBlocking(FLEXIO_UART_Type *base, const uint8_t *txData, size_t txSize);
373
374 /*!
375 * @brief Receives a buffer of bytes.
376 *
377 * @note This function blocks using the polling method until all bytes have been received.
378 *
379 * @param base Pointer to the FLEXIO_UART_Type structure.
380 * @param rxData The buffer to store the received bytes.
381 * @param rxSize The number of data bytes to be received.
382 */
383 void FLEXIO_UART_ReadBlocking(FLEXIO_UART_Type *base, uint8_t *rxData, size_t rxSize);
384
385 /* @} */
386
387 /*!
388 * @name Transactional
389 * @{
390 */
391
392 /*!
393 * @brief Initializes the UART handle.
394 *
395 * This function initializes the FlexIO UART handle, which can be used for other FlexIO
396 * UART transactional APIs. Call this API once to get the
397 * initialized handle.
398 *
399 * The UART driver supports the "background" receiving, which means that users can set up
400 * a RX ring buffer optionally. Data received is stored into the ring buffer even when
401 * the user doesn't call the FLEXIO_UART_TransferReceiveNonBlocking() API. If there is already data
402 * received in the ring buffer, users can get the received data from the ring buffer
403 * directly. The ring buffer is disabled if passing NULL as @p ringBuffer.
404 *
405 * @param base to FLEXIO_UART_Type structure.
406 * @param handle Pointer to the flexio_uart_handle_t structure to store the transfer state.
407 * @param callback The callback function.
408 * @param userData The parameter of the callback function.
409 * @retval kStatus_Success Successfully create the handle.
410 * @retval kStatus_OutOfRange The FlexIO type/handle/ISR table out of range.
411 */
412 status_t FLEXIO_UART_TransferCreateHandle(FLEXIO_UART_Type *base,
413 flexio_uart_handle_t *handle,
414 flexio_uart_transfer_callback_t callback,
415 void *userData);
416
417 /*!
418 * @brief Sets up the RX ring buffer.
419 *
420 * This function sets up the RX ring buffer to a specific UART handle.
421 *
422 * When the RX ring buffer is used, data received is stored into the ring buffer even when
423 * the user doesn't call the UART_ReceiveNonBlocking() API. If there is already data received
424 * in the ring buffer, users can get the received data from the ring buffer directly.
425 *
426 * @note When using the RX ring buffer, one byte is reserved for internal use. In other
427 * words, if @p ringBufferSize is 32, only 31 bytes are used for saving data.
428 *
429 * @param base Pointer to the FLEXIO_UART_Type structure.
430 * @param handle Pointer to the flexio_uart_handle_t structure to store the transfer state.
431 * @param ringBuffer Start address of ring buffer for background receiving. Pass NULL to disable the ring buffer.
432 * @param ringBufferSize Size of the ring buffer.
433 */
434 void FLEXIO_UART_TransferStartRingBuffer(FLEXIO_UART_Type *base,
435 flexio_uart_handle_t *handle,
436 uint8_t *ringBuffer,
437 size_t ringBufferSize);
438
439 /*!
440 * @brief Aborts the background transfer and uninstalls the ring buffer.
441 *
442 * This function aborts the background transfer and uninstalls the ring buffer.
443 *
444 * @param base Pointer to the FLEXIO_UART_Type structure.
445 * @param handle Pointer to the flexio_uart_handle_t structure to store the transfer state.
446 */
447 void FLEXIO_UART_TransferStopRingBuffer(FLEXIO_UART_Type *base, flexio_uart_handle_t *handle);
448
449 /*!
450 * @brief Transmits a buffer of data using the interrupt method.
451 *
452 * This function sends data using an interrupt method. This is a non-blocking function,
453 * which returns directly without waiting for all data to be written to the TX register. When
454 * all data is written to the TX register in ISR, the FlexIO UART driver calls the callback
455 * function and passes the @ref kStatus_FLEXIO_UART_TxIdle as status parameter.
456 *
457 * @note The kStatus_FLEXIO_UART_TxIdle is passed to the upper layer when all data is written
458 * to the TX register. However, it does not ensure that all data is sent out.
459 *
460 * @param base Pointer to the FLEXIO_UART_Type structure.
461 * @param handle Pointer to the flexio_uart_handle_t structure to store the transfer state.
462 * @param xfer FlexIO UART transfer structure. See #flexio_uart_transfer_t.
463 * @retval kStatus_Success Successfully starts the data transmission.
464 * @retval kStatus_UART_TxBusy Previous transmission still not finished, data not written to the TX register.
465 */
466 status_t FLEXIO_UART_TransferSendNonBlocking(FLEXIO_UART_Type *base,
467 flexio_uart_handle_t *handle,
468 flexio_uart_transfer_t *xfer);
469
470 /*!
471 * @brief Aborts the interrupt-driven data transmit.
472 *
473 * This function aborts the interrupt-driven data sending. Get the remainBytes to find out
474 * how many bytes are still not sent out.
475 *
476 * @param base Pointer to the FLEXIO_UART_Type structure.
477 * @param handle Pointer to the flexio_uart_handle_t structure to store the transfer state.
478 */
479 void FLEXIO_UART_TransferAbortSend(FLEXIO_UART_Type *base, flexio_uart_handle_t *handle);
480
481 /*!
482 * @brief Gets the number of bytes sent.
483 *
484 * This function gets the number of bytes sent driven by interrupt.
485 *
486 * @param base Pointer to the FLEXIO_UART_Type structure.
487 * @param handle Pointer to the flexio_uart_handle_t structure to store the transfer state.
488 * @param count Number of bytes sent so far by the non-blocking transaction.
489 * @retval kStatus_NoTransferInProgress transfer has finished or no transfer in progress.
490 * @retval kStatus_Success Successfully return the count.
491 */
492 status_t FLEXIO_UART_TransferGetSendCount(FLEXIO_UART_Type *base, flexio_uart_handle_t *handle, size_t *count);
493
494 /*!
495 * @brief Receives a buffer of data using the interrupt method.
496 *
497 * This function receives data using the interrupt method. This is a non-blocking function,
498 * which returns without waiting for all data to be received.
499 * If the RX ring buffer is used and not empty, the data in ring buffer is copied and
500 * the parameter @p receivedBytes shows how many bytes are copied from the ring buffer.
501 * After copying, if the data in ring buffer is not enough to read, the receive
502 * request is saved by the UART driver. When new data arrives, the receive request
503 * is serviced first. When all data is received, the UART driver notifies the upper layer
504 * through a callback function and passes the status parameter @ref kStatus_UART_RxIdle.
505 * For example, if the upper layer needs 10 bytes but there are only 5 bytes in the ring buffer,
506 * the 5 bytes are copied to xfer->data. This function returns with the
507 * parameter @p receivedBytes set to 5. For the last 5 bytes, newly arrived data is
508 * saved from the xfer->data[5]. When 5 bytes are received, the UART driver notifies upper layer.
509 * If the RX ring buffer is not enabled, this function enables the RX and RX interrupt
510 * to receive data to xfer->data. When all data is received, the upper layer is notified.
511 *
512 * @param base Pointer to the FLEXIO_UART_Type structure.
513 * @param handle Pointer to the flexio_uart_handle_t structure to store the transfer state.
514 * @param xfer UART transfer structure. See #flexio_uart_transfer_t.
515 * @param receivedBytes Bytes received from the ring buffer directly.
516 * @retval kStatus_Success Successfully queue the transfer into the transmit queue.
517 * @retval kStatus_FLEXIO_UART_RxBusy Previous receive request is not finished.
518 */
519 status_t FLEXIO_UART_TransferReceiveNonBlocking(FLEXIO_UART_Type *base,
520 flexio_uart_handle_t *handle,
521 flexio_uart_transfer_t *xfer,
522 size_t *receivedBytes);
523
524 /*!
525 * @brief Aborts the receive data which was using IRQ.
526 *
527 * This function aborts the receive data which was using IRQ.
528 *
529 * @param base Pointer to the FLEXIO_UART_Type structure.
530 * @param handle Pointer to the flexio_uart_handle_t structure to store the transfer state.
531 */
532 void FLEXIO_UART_TransferAbortReceive(FLEXIO_UART_Type *base, flexio_uart_handle_t *handle);
533
534 /*!
535 * @brief Gets the number of bytes received.
536 *
537 * This function gets the number of bytes received driven by interrupt.
538 *
539 * @param base Pointer to the FLEXIO_UART_Type structure.
540 * @param handle Pointer to the flexio_uart_handle_t structure to store the transfer state.
541 * @param count Number of bytes received so far by the non-blocking transaction.
542 * @retval kStatus_NoTransferInProgress transfer has finished or no transfer in progress.
543 * @retval kStatus_Success Successfully return the count.
544 */
545 status_t FLEXIO_UART_TransferGetReceiveCount(FLEXIO_UART_Type *base, flexio_uart_handle_t *handle, size_t *count);
546
547 /*!
548 * @brief FlexIO UART IRQ handler function.
549 *
550 * This function processes the FlexIO UART transmit and receives the IRQ request.
551 *
552 * @param uartType Pointer to the FLEXIO_UART_Type structure.
553 * @param uartHandle Pointer to the flexio_uart_handle_t structure to store the transfer state.
554 */
555 void FLEXIO_UART_TransferHandleIRQ(void *uartType, void *uartHandle);
556
557 /*@}*/
558
559 #if defined(__cplusplus)
560 }
561 #endif /*_cplusplus*/
562 /*@}*/
563
564 #endif /*_FSL_FLEXIO_UART_H_*/
565
