1 /*
2 * Copyright (c) 2015, Freescale Semiconductor, Inc.
3 * Copyright 2016-2020 NXP
4 * All rights reserved.
5 *
6 * SPDX-License-Identifier: BSD-3-Clause
7 */
8 #ifndef _FSL_DSPI_H_
9 #define _FSL_DSPI_H_
10
11 #include "fsl_common.h"
12
13 /*!
14 * @addtogroup dspi_driver
15 * @{
16 */
17
18 /**********************************************************************************************************************
19 * Definitions
20 *********************************************************************************************************************/
21
22 /*! @name Driver version */
23 /*@{*/
24 /*! @brief DSPI driver version 2.2.4. */
25 #define FSL_DSPI_DRIVER_VERSION (MAKE_VERSION(2, 2, 4))
26 /*@}*/
27
28 #ifndef DSPI_DUMMY_DATA
29 /*! @brief DSPI dummy data if there is no Tx data.*/
30 #define DSPI_DUMMY_DATA (0x00U) /*!< Dummy data used for Tx if there is no txData. */
31 #endif
32
33 /*! @brief Global variable for dummy data value setting. */
34 extern volatile uint8_t g_dspiDummyData[];
35
36 /*! @brief Status for the DSPI driver.*/
37 enum
38 {
39 kStatus_DSPI_Busy = MAKE_STATUS(kStatusGroup_DSPI, 0), /*!< DSPI transfer is busy.*/
40 kStatus_DSPI_Error = MAKE_STATUS(kStatusGroup_DSPI, 1), /*!< DSPI driver error. */
41 kStatus_DSPI_Idle = MAKE_STATUS(kStatusGroup_DSPI, 2), /*!< DSPI is idle.*/
42 kStatus_DSPI_OutOfRange = MAKE_STATUS(kStatusGroup_DSPI, 3) /*!< DSPI transfer out of range. */
43 };
44
45 /*! @brief DSPI status flags in SPIx_SR register.*/
46 enum _dspi_flags
47 {
48 kDSPI_TxCompleteFlag = (int)SPI_SR_TCF_MASK, /*!< Transfer Complete Flag. */
49 kDSPI_EndOfQueueFlag = SPI_SR_EOQF_MASK, /*!< End of Queue Flag.*/
50 kDSPI_TxFifoUnderflowFlag = SPI_SR_TFUF_MASK, /*!< Transmit FIFO Underflow Flag.*/
51 kDSPI_TxFifoFillRequestFlag = SPI_SR_TFFF_MASK, /*!< Transmit FIFO Fill Flag.*/
52 kDSPI_RxFifoOverflowFlag = SPI_SR_RFOF_MASK, /*!< Receive FIFO Overflow Flag.*/
53 kDSPI_RxFifoDrainRequestFlag = SPI_SR_RFDF_MASK, /*!< Receive FIFO Drain Flag.*/
54 kDSPI_TxAndRxStatusFlag = SPI_SR_TXRXS_MASK, /*!< The module is in Stopped/Running state.*/
55 kDSPI_AllStatusFlag = (int)(SPI_SR_TCF_MASK | SPI_SR_EOQF_MASK | SPI_SR_TFUF_MASK | SPI_SR_TFFF_MASK |
56 SPI_SR_RFOF_MASK | SPI_SR_RFDF_MASK | SPI_SR_TXRXS_MASK) /*!< All statuses above.*/
57 };
58
59 /*! @brief DSPI interrupt source.*/
60 enum _dspi_interrupt_enable
61 {
62 kDSPI_TxCompleteInterruptEnable = (int)SPI_RSER_TCF_RE_MASK, /*!< TCF interrupt enable.*/
63 kDSPI_EndOfQueueInterruptEnable = SPI_RSER_EOQF_RE_MASK, /*!< EOQF interrupt enable.*/
64 kDSPI_TxFifoUnderflowInterruptEnable = SPI_RSER_TFUF_RE_MASK, /*!< TFUF interrupt enable.*/
65 kDSPI_TxFifoFillRequestInterruptEnable = SPI_RSER_TFFF_RE_MASK, /*!< TFFF interrupt enable, DMA disable.*/
66 kDSPI_RxFifoOverflowInterruptEnable = SPI_RSER_RFOF_RE_MASK, /*!< RFOF interrupt enable.*/
67 kDSPI_RxFifoDrainRequestInterruptEnable = SPI_RSER_RFDF_RE_MASK, /*!< RFDF interrupt enable, DMA disable.*/
68 kDSPI_AllInterruptEnable = (int)(SPI_RSER_TCF_RE_MASK | SPI_RSER_EOQF_RE_MASK | SPI_RSER_TFUF_RE_MASK |
69 SPI_RSER_TFFF_RE_MASK | SPI_RSER_RFOF_RE_MASK | SPI_RSER_RFDF_RE_MASK)
70 /*!< All above interrupts enable.*/
71 };
72
73 /*! @brief DSPI DMA source.*/
74 enum _dspi_dma_enable
75 {
76 kDSPI_TxDmaEnable = (SPI_RSER_TFFF_RE_MASK | SPI_RSER_TFFF_DIRS_MASK), /*!< TFFF flag generates DMA requests.
77 No Tx interrupt request. */
78 kDSPI_RxDmaEnable = (SPI_RSER_RFDF_RE_MASK | SPI_RSER_RFDF_DIRS_MASK) /*!< RFDF flag generates DMA requests.
79 No Rx interrupt request. */
80 };
81
82 /*! @brief DSPI master or slave mode configuration.*/
83 typedef enum _dspi_master_slave_mode
84 {
85 kDSPI_Master = 1U, /*!< DSPI peripheral operates in master mode.*/
86 kDSPI_Slave = 0U /*!< DSPI peripheral operates in slave mode.*/
87 } dspi_master_slave_mode_t;
88
89 /*!
90 * @brief DSPI Sample Point: Controls when the DSPI master samples SIN in the Modified Transfer Format. This field is
91 * valid only when the CPHA bit in the CTAR register is 0.
92 */
93 typedef enum _dspi_master_sample_point
94 {
95 kDSPI_SckToSin0Clock = 0U, /*!< 0 system clocks between SCK edge and SIN sample.*/
96 kDSPI_SckToSin1Clock = 1U, /*!< 1 system clock between SCK edge and SIN sample.*/
97 kDSPI_SckToSin2Clock = 2U /*!< 2 system clocks between SCK edge and SIN sample.*/
98 } dspi_master_sample_point_t;
99
100 /*! @brief DSPI Peripheral Chip Select (Pcs) configuration (which Pcs to configure).*/
101 typedef enum _dspi_which_pcs_config
102 {
103 kDSPI_Pcs0 = 1U << 0, /*!< Pcs[0] */
104 kDSPI_Pcs1 = 1U << 1, /*!< Pcs[1] */
105 kDSPI_Pcs2 = 1U << 2, /*!< Pcs[2] */
106 kDSPI_Pcs3 = 1U << 3, /*!< Pcs[3] */
107 kDSPI_Pcs4 = 1U << 4, /*!< Pcs[4] */
108 kDSPI_Pcs5 = 1U << 5 /*!< Pcs[5] */
109 } dspi_which_pcs_t;
110
111 /*! @brief DSPI Peripheral Chip Select (Pcs) Polarity configuration.*/
112 typedef enum _dspi_pcs_polarity_config
113 {
114 kDSPI_PcsActiveHigh = 0U, /*!< Pcs Active High (idles low). */
115 kDSPI_PcsActiveLow = 1U /*!< Pcs Active Low (idles high). */
116 } dspi_pcs_polarity_config_t;
117
118 /*! @brief DSPI Peripheral Chip Select (Pcs) Polarity.*/
119 enum _dspi_pcs_polarity
120 {
121 kDSPI_Pcs0ActiveLow = 1U << 0, /*!< Pcs0 Active Low (idles high). */
122 kDSPI_Pcs1ActiveLow = 1U << 1, /*!< Pcs1 Active Low (idles high). */
123 kDSPI_Pcs2ActiveLow = 1U << 2, /*!< Pcs2 Active Low (idles high). */
124 kDSPI_Pcs3ActiveLow = 1U << 3, /*!< Pcs3 Active Low (idles high). */
125 kDSPI_Pcs4ActiveLow = 1U << 4, /*!< Pcs4 Active Low (idles high). */
126 kDSPI_Pcs5ActiveLow = 1U << 5, /*!< Pcs5 Active Low (idles high). */
127 kDSPI_PcsAllActiveLow = 0xFFU /*!< Pcs0 to Pcs5 Active Low (idles high). */
128 };
129
130 /*! @brief DSPI clock polarity configuration for a given CTAR.*/
131 typedef enum _dspi_clock_polarity
132 {
133 kDSPI_ClockPolarityActiveHigh = 0U, /*!< CPOL=0. Active-high DSPI clock (idles low).*/
134 kDSPI_ClockPolarityActiveLow = 1U /*!< CPOL=1. Active-low DSPI clock (idles high).*/
135 } dspi_clock_polarity_t;
136
137 /*! @brief DSPI clock phase configuration for a given CTAR.*/
138 typedef enum _dspi_clock_phase
139 {
140 kDSPI_ClockPhaseFirstEdge = 0U, /*!< CPHA=0. Data is captured on the leading edge of the SCK and changed on the
141 following edge.*/
142 kDSPI_ClockPhaseSecondEdge = 1U /*!< CPHA=1. Data is changed on the leading edge of the SCK and captured on the
143 following edge.*/
144 } dspi_clock_phase_t;
145
146 /*! @brief DSPI data shifter direction options for a given CTAR.*/
147 typedef enum _dspi_shift_direction
148 {
149 kDSPI_MsbFirst = 0U, /*!< Data transfers start with most significant bit.*/
150 kDSPI_LsbFirst = 1U /*!< Data transfers start with least significant bit.
151 Shifting out of LSB is not supported for slave */
152 } dspi_shift_direction_t;
153
154 /*! @brief DSPI delay type selection.*/
155 typedef enum _dspi_delay_type
156 {
157 kDSPI_PcsToSck = 1U, /*!< Pcs-to-SCK delay. */
158 kDSPI_LastSckToPcs, /*!< The last SCK edge to Pcs delay. */
159 kDSPI_BetweenTransfer /*!< Delay between transfers. */
160 } dspi_delay_type_t;
161
162 /*! @brief DSPI Clock and Transfer Attributes Register (CTAR) selection.*/
163 typedef enum _dspi_ctar_selection
164 {
165 kDSPI_Ctar0 = 0U, /*!< CTAR0 selection option for master or slave mode; note that CTAR0 and CTAR0_SLAVE are the
166 same register address. */
167 kDSPI_Ctar1 = 1U, /*!< CTAR1 selection option for master mode only. */
168 kDSPI_Ctar2 = 2U, /*!< CTAR2 selection option for master mode only; note that some devices do not support CTAR2. */
169 kDSPI_Ctar3 = 3U, /*!< CTAR3 selection option for master mode only; note that some devices do not support CTAR3. */
170 kDSPI_Ctar4 = 4U, /*!< CTAR4 selection option for master mode only; note that some devices do not support CTAR4. */
171 kDSPI_Ctar5 = 5U, /*!< CTAR5 selection option for master mode only; note that some devices do not support CTAR5. */
172 kDSPI_Ctar6 = 6U, /*!< CTAR6 selection option for master mode only; note that some devices do not support CTAR6. */
173 kDSPI_Ctar7 = 7U /*!< CTAR7 selection option for master mode only; note that some devices do not support CTAR7. */
174 } dspi_ctar_selection_t;
175
176 #define DSPI_MASTER_CTAR_SHIFT (0U) /*!< DSPI master CTAR shift macro; used internally. */
177 #define DSPI_MASTER_CTAR_MASK (0x0FU) /*!< DSPI master CTAR mask macro; used internally. */
178 #define DSPI_MASTER_PCS_SHIFT (4U) /*!< DSPI master PCS shift macro; used internally. */
179 #define DSPI_MASTER_PCS_MASK (0xF0U) /*!< DSPI master PCS mask macro; used internally. */
180 /*! @brief Use this enumeration for the DSPI master transfer configFlags. */
181 enum _dspi_transfer_config_flag_for_master
182 {
183 kDSPI_MasterCtar0 = 0U << DSPI_MASTER_CTAR_SHIFT, /*!< DSPI master transfer use CTAR0 setting. */
184 kDSPI_MasterCtar1 = 1U << DSPI_MASTER_CTAR_SHIFT, /*!< DSPI master transfer use CTAR1 setting. */
185 kDSPI_MasterCtar2 = 2U << DSPI_MASTER_CTAR_SHIFT, /*!< DSPI master transfer use CTAR2 setting. */
186 kDSPI_MasterCtar3 = 3U << DSPI_MASTER_CTAR_SHIFT, /*!< DSPI master transfer use CTAR3 setting. */
187 kDSPI_MasterCtar4 = 4U << DSPI_MASTER_CTAR_SHIFT, /*!< DSPI master transfer use CTAR4 setting. */
188 kDSPI_MasterCtar5 = 5U << DSPI_MASTER_CTAR_SHIFT, /*!< DSPI master transfer use CTAR5 setting. */
189 kDSPI_MasterCtar6 = 6U << DSPI_MASTER_CTAR_SHIFT, /*!< DSPI master transfer use CTAR6 setting. */
190 kDSPI_MasterCtar7 = 7U << DSPI_MASTER_CTAR_SHIFT, /*!< DSPI master transfer use CTAR7 setting. */
191
192 kDSPI_MasterPcs0 = 0U << DSPI_MASTER_PCS_SHIFT, /*!< DSPI master transfer use PCS0 signal. */
193 kDSPI_MasterPcs1 = 1U << DSPI_MASTER_PCS_SHIFT, /*!< DSPI master transfer use PCS1 signal. */
194 kDSPI_MasterPcs2 = 2U << DSPI_MASTER_PCS_SHIFT, /*!< DSPI master transfer use PCS2 signal.*/
195 kDSPI_MasterPcs3 = 3U << DSPI_MASTER_PCS_SHIFT, /*!< DSPI master transfer use PCS3 signal. */
196 kDSPI_MasterPcs4 = 4U << DSPI_MASTER_PCS_SHIFT, /*!< DSPI master transfer use PCS4 signal. */
197 kDSPI_MasterPcs5 = 5U << DSPI_MASTER_PCS_SHIFT, /*!< DSPI master transfer use PCS5 signal. */
198
199 kDSPI_MasterPcsContinuous = 1U << 20, /*!< Indicates whether the PCS signal is continuous. */
200 kDSPI_MasterActiveAfterTransfer = 1U << 21,
201 /*!< Indicates whether the PCS signal is active after the last frame transfer.*/
202 };
203
204 #define DSPI_SLAVE_CTAR_SHIFT (0U) /*!< DSPI slave CTAR shift macro; used internally. */
205 #define DSPI_SLAVE_CTAR_MASK (0x07U) /*!< DSPI slave CTAR mask macro; used internally. */
206 /*! @brief Use this enumeration for the DSPI slave transfer configFlags. */
207 enum _dspi_transfer_config_flag_for_slave
208 {
209 kDSPI_SlaveCtar0 = 0U << DSPI_SLAVE_CTAR_SHIFT, /*!< DSPI slave transfer use CTAR0 setting.
210 DSPI slave can only use PCS0. */
211 };
212
213 /*! @brief DSPI transfer state, which is used for DSPI transactional API state machine. */
214 enum _dspi_transfer_state
215 {
216 kDSPI_Idle = 0x0U, /*!< Nothing in the transmitter/receiver. */
217 kDSPI_Busy, /*!< Transfer queue is not finished. */
218 kDSPI_Error /*!< Transfer error. */
219 };
220
221 /*! @brief DSPI master command date configuration used for the SPIx_PUSHR.*/
222 typedef struct _dspi_command_data_config
223 {
224 bool isPcsContinuous; /*!< Option to enable the continuous assertion of the chip select between transfers.*/
225 uint8_t whichCtar; /*!< The desired Clock and Transfer Attributes
226 Register (CTAR) to use for CTAS.*/
227 uint8_t whichPcs; /*!< The desired PCS signal to use for the data transfer.*/
228 bool isEndOfQueue; /*!< Signals that the current transfer is the last in the queue.*/
229 bool clearTransferCount; /*!< Clears the SPI Transfer Counter (SPI_TCNT) before transmission starts.*/
230 } dspi_command_data_config_t;
231
232 /*! @brief DSPI master ctar configuration structure.*/
233 typedef struct _dspi_master_ctar_config
234 {
235 uint32_t baudRate; /*!< Baud Rate for DSPI. */
236 uint32_t bitsPerFrame; /*!< Bits per frame, minimum 4, maximum 16.*/
237 dspi_clock_polarity_t cpol; /*!< Clock polarity. */
238 dspi_clock_phase_t cpha; /*!< Clock phase. */
239 dspi_shift_direction_t direction; /*!< MSB or LSB data shift direction. */
240
241 uint32_t pcsToSckDelayInNanoSec; /*!< PCS to SCK delay time in nanoseconds; setting to 0 sets the minimum
242 delay. It also sets the boundary value if out of range.*/
243 uint32_t lastSckToPcsDelayInNanoSec; /*!< The last SCK to PCS delay time in nanoseconds; setting to 0 sets the
244 minimum delay. It also sets the boundary value if out of range.*/
245
246 uint32_t betweenTransferDelayInNanoSec;
247 /*!< After the SCK delay time in nanoseconds; setting to 0 sets the minimum
248 delay. It also sets the boundary value if out of range.*/
249 } dspi_master_ctar_config_t;
250
251 /*! @brief DSPI master configuration structure.*/
252 typedef struct _dspi_master_config
253 {
254 dspi_ctar_selection_t whichCtar; /*!< The desired CTAR to use. */
255 dspi_master_ctar_config_t ctarConfig; /*!< Set the ctarConfig to the desired CTAR. */
256
257 dspi_which_pcs_t whichPcs; /*!< The desired Peripheral Chip Select (pcs). */
258 dspi_pcs_polarity_config_t pcsActiveHighOrLow; /*!< The desired PCS active high or low. */
259
260 bool enableContinuousSCK; /*!< CONT_SCKE, continuous SCK enable. Note that the continuous SCK is only
261 supported for CPHA = 1.*/
262 bool enableRxFifoOverWrite; /*!< ROOE, receive FIFO overflow overwrite enable. If ROOE = 0, the incoming
263 data is ignored and the data from the transfer that generated the overflow
264 is also ignored. If ROOE = 1, the incoming data is shifted to the
265 shift register. */
266
267 bool enableModifiedTimingFormat; /*!< Enables a modified transfer format to be used if true.*/
268 dspi_master_sample_point_t samplePoint; /*!< Controls when the module master samples SIN in the Modified Transfer
269 Format. It's valid only when CPHA=0. */
270 } dspi_master_config_t;
271
272 /*! @brief DSPI slave ctar configuration structure.*/
273 typedef struct _dspi_slave_ctar_config
274 {
275 uint32_t bitsPerFrame; /*!< Bits per frame, minimum 4, maximum 16.*/
276 dspi_clock_polarity_t cpol; /*!< Clock polarity. */
277 dspi_clock_phase_t cpha; /*!< Clock phase. */
278 /*!< Slave only supports MSB and does not support LSB.*/
279 } dspi_slave_ctar_config_t;
280
281 /*! @brief DSPI slave configuration structure.*/
282 typedef struct _dspi_slave_config
283 {
284 dspi_ctar_selection_t whichCtar; /*!< The desired CTAR to use. */
285 dspi_slave_ctar_config_t ctarConfig; /*!< Set the ctarConfig to the desired CTAR. */
286
287 bool enableContinuousSCK; /*!< CONT_SCKE, continuous SCK enable. Note that the continuous SCK is only
288 supported for CPHA = 1.*/
289 bool enableRxFifoOverWrite; /*!< ROOE, receive FIFO overflow overwrite enable. If ROOE = 0, the incoming
290 data is ignored and the data from the transfer that generated the overflow
291 is also ignored. If ROOE = 1, the incoming data is shifted to the
292 shift register. */
293 bool enableModifiedTimingFormat; /*!< Enables a modified transfer format to be used if true.*/
294 dspi_master_sample_point_t samplePoint; /*!< Controls when the module master samples SIN in the Modified Transfer
295 Format. It's valid only when CPHA=0. */
296 } dspi_slave_config_t;
297
298 /*!
299 * @brief Forward declaration of the @ref _dspi_master_handle typedefs.
300 */
301 typedef struct _dspi_master_handle dspi_master_handle_t; /*!< The master handle. */
302
303 /*!
304 * @brief Forward declaration of the @ref _dspi_slave_handle typedefs.
305 */
306 typedef struct _dspi_slave_handle dspi_slave_handle_t; /*!< The slave handle. */
307
308 /*!
309 * @brief Completion callback function pointer type.
310 *
311 * @param base DSPI peripheral address.
312 * @param handle Pointer to the handle for the DSPI master.
313 * @param status Success or error code describing whether the transfer completed.
314 * @param userData Arbitrary pointer-dataSized value passed from the application.
315 */
316 typedef void (*dspi_master_transfer_callback_t)(SPI_Type *base,
317 dspi_master_handle_t *handle,
318 status_t status,
319 void *userData);
320 /*!
321 * @brief Completion callback function pointer type.
322 *
323 * @param base DSPI peripheral address.
324 * @param handle Pointer to the handle for the DSPI slave.
325 * @param status Success or error code describing whether the transfer completed.
326 * @param userData Arbitrary pointer-dataSized value passed from the application.
327 */
328 typedef void (*dspi_slave_transfer_callback_t)(SPI_Type *base,
329 dspi_slave_handle_t *handle,
330 status_t status,
331 void *userData);
332
333 /*! @brief DSPI master/slave transfer structure.*/
334 typedef struct _dspi_transfer
335 {
336 uint8_t *txData; /*!< Send buffer. */
337 uint8_t *rxData; /*!< Receive buffer. */
338 volatile size_t dataSize; /*!< Transfer bytes. */
339
340 uint32_t configFlags; /*!< Transfer transfer configuration flags. Set from @ref
341 _dspi_transfer_config_flag_for_master if the transfer is used for master or @ref
342 _dspi_transfer_config_flag_for_slave enumeration if the transfer is used for slave.*/
343 } dspi_transfer_t;
344
345 /*! @brief DSPI half-duplex(master) transfer structure */
346 typedef struct _dspi_half_duplex_transfer
347 {
348 uint8_t *txData; /*!< Send buffer */
349 uint8_t *rxData; /*!< Receive buffer */
350 size_t txDataSize; /*!< Transfer bytes for transmit */
351 size_t rxDataSize; /*!< Transfer bytes */
352 uint32_t configFlags; /*!< Transfer configuration flags; set from @ref _dspi_transfer_config_flag_for_master. */
353 bool isPcsAssertInTransfer; /*!< If Pcs pin keep assert between transmit and receive. true for assert and false for
354 de-assert. */
355 bool isTransmitFirst; /*!< True for transmit first and false for receive first. */
356 } dspi_half_duplex_transfer_t;
357
358 /*! @brief DSPI master transfer handle structure used for transactional API. */
359 struct _dspi_master_handle
360 {
361 uint32_t bitsPerFrame; /*!< The desired number of bits per frame. */
362 volatile uint32_t command; /*!< The desired data command. */
363 volatile uint32_t lastCommand; /*!< The desired last data command. */
364
365 uint8_t fifoSize; /*!< FIFO dataSize. */
366
367 volatile bool
368 isPcsActiveAfterTransfer; /*!< Indicates whether the PCS signal is active after the last frame transfer.*/
369 volatile bool isThereExtraByte; /*!< Indicates whether there are extra bytes.*/
370
371 uint8_t *volatile txData; /*!< Send buffer. */
372 uint8_t *volatile rxData; /*!< Receive buffer. */
373 volatile size_t remainingSendByteCount; /*!< A number of bytes remaining to send.*/
374 volatile size_t remainingReceiveByteCount; /*!< A number of bytes remaining to receive.*/
375 size_t totalByteCount; /*!< A number of transfer bytes*/
376
377 volatile uint8_t state; /*!< DSPI transfer state, see @ref _dspi_transfer_state.*/
378
379 dspi_master_transfer_callback_t callback; /*!< Completion callback. */
380 void *userData; /*!< Callback user data. */
381 };
382
383 /*! @brief DSPI slave transfer handle structure used for the transactional API. */
384 struct _dspi_slave_handle
385 {
386 uint32_t bitsPerFrame; /*!< The desired number of bits per frame. */
387 volatile bool isThereExtraByte; /*!< Indicates whether there are extra bytes.*/
388
389 uint8_t *volatile txData; /*!< Send buffer. */
390 uint8_t *volatile rxData; /*!< Receive buffer. */
391 volatile size_t remainingSendByteCount; /*!< A number of bytes remaining to send.*/
392 volatile size_t remainingReceiveByteCount; /*!< A number of bytes remaining to receive.*/
393 size_t totalByteCount; /*!< A number of transfer bytes*/
394
395 volatile uint8_t state; /*!< DSPI transfer state.*/
396
397 volatile uint32_t errorCount; /*!< Error count for slave transfer.*/
398
399 dspi_slave_transfer_callback_t callback; /*!< Completion callback. */
400 void *userData; /*!< Callback user data. */
401 };
402
403 /**********************************************************************************************************************
404 * API
405 *********************************************************************************************************************/
406 #if defined(__cplusplus)
407 extern "C" {
408 #endif /*_cplusplus*/
409
410 /*!
411 * @name Initialization and deinitialization
412 * @{
413 */
414
415 /*!
416 * @brief Initializes the DSPI master.
417 *
418 * This function initializes the DSPI master configuration. This is an example use case.
419 * @code
420 * dspi_master_config_t masterConfig;
421 * masterConfig.whichCtar = kDSPI_Ctar0;
422 * masterConfig.ctarConfig.baudRate = 500000000U;
423 * masterConfig.ctarConfig.bitsPerFrame = 8;
424 * masterConfig.ctarConfig.cpol = kDSPI_ClockPolarityActiveHigh;
425 * masterConfig.ctarConfig.cpha = kDSPI_ClockPhaseFirstEdge;
426 * masterConfig.ctarConfig.direction = kDSPI_MsbFirst;
427 * masterConfig.ctarConfig.pcsToSckDelayInNanoSec = 1000000000U / masterConfig.ctarConfig.baudRate ;
428 * masterConfig.ctarConfig.lastSckToPcsDelayInNanoSec = 1000000000U / masterConfig.ctarConfig.baudRate ;
429 * masterConfig.ctarConfig.betweenTransferDelayInNanoSec = 1000000000U / masterConfig.ctarConfig.baudRate ;
430 * masterConfig.whichPcs = kDSPI_Pcs0;
431 * masterConfig.pcsActiveHighOrLow = kDSPI_PcsActiveLow;
432 * masterConfig.enableContinuousSCK = false;
433 * masterConfig.enableRxFifoOverWrite = false;
434 * masterConfig.enableModifiedTimingFormat = false;
435 * masterConfig.samplePoint = kDSPI_SckToSin0Clock;
436 * DSPI_MasterInit(base, &masterConfig, srcClock_Hz);
437 * @endcode
438 *
439 * @param base DSPI peripheral address.
440 * @param masterConfig Pointer to the structure @ref dspi_master_config_t.
441 * @param srcClock_Hz Module source input clock in Hertz.
442 */
443 void DSPI_MasterInit(SPI_Type *base, const dspi_master_config_t *masterConfig, uint32_t srcClock_Hz);
444
445 /*!
446 * @brief Sets the @ref dspi_master_config_t structure to default values.
447 *
448 * The purpose of this API is to get the configuration structure initialized for the DSPI_MasterInit().
449 * Users may use the initialized structure unchanged in the DSPI_MasterInit() or modify the structure
450 * before calling the DSPI_MasterInit().
451 * Example:
452 * @code
453 * dspi_master_config_t masterConfig;
454 * DSPI_MasterGetDefaultConfig(&masterConfig);
455 * @endcode
456 * @param masterConfig pointer to @ref dspi_master_config_t structure
457 */
458 void DSPI_MasterGetDefaultConfig(dspi_master_config_t *masterConfig);
459
460 /*!
461 * @brief DSPI slave configuration.
462 *
463 * This function initializes the DSPI slave configuration. This is an example use case.
464 * @code
465 * dspi_slave_config_t slaveConfig;
466 * slaveConfig->whichCtar = kDSPI_Ctar0;
467 * slaveConfig->ctarConfig.bitsPerFrame = 8;
468 * slaveConfig->ctarConfig.cpol = kDSPI_ClockPolarityActiveHigh;
469 * slaveConfig->ctarConfig.cpha = kDSPI_ClockPhaseFirstEdge;
470 * slaveConfig->enableContinuousSCK = false;
471 * slaveConfig->enableRxFifoOverWrite = false;
472 * slaveConfig->enableModifiedTimingFormat = false;
473 * slaveConfig->samplePoint = kDSPI_SckToSin0Clock;
474 * DSPI_SlaveInit(base, &slaveConfig);
475 * @endcode
476 *
477 * @param base DSPI peripheral address.
478 * @param slaveConfig Pointer to the structure @ref dspi_master_config_t.
479 */
480 void DSPI_SlaveInit(SPI_Type *base, const dspi_slave_config_t *slaveConfig);
481
482 /*!
483 * @brief Sets the @ref dspi_slave_config_t structure to a default value.
484 *
485 * The purpose of this API is to get the configuration structure initialized for the DSPI_SlaveInit().
486 * Users may use the initialized structure unchanged in the DSPI_SlaveInit() or modify the structure
487 * before calling the DSPI_SlaveInit().
488 * This is an example.
489 * @code
490 * dspi_slave_config_t slaveConfig;
491 * DSPI_SlaveGetDefaultConfig(&slaveConfig);
492 * @endcode
493 * @param slaveConfig Pointer to the @ref dspi_slave_config_t structure.
494 */
495 void DSPI_SlaveGetDefaultConfig(dspi_slave_config_t *slaveConfig);
496
497 /*!
498 * @brief De-initializes the DSPI peripheral. Call this API to disable the DSPI clock.
499 * @param base DSPI peripheral address.
500 */
501 void DSPI_Deinit(SPI_Type *base);
502
503 /*!
504 * @brief Enables the DSPI peripheral and sets the MCR MDIS to 0.
505 *
506 * @param base DSPI peripheral address.
507 * @param enable Pass true to enable module, false to disable module.
508 */
DSPI_Enable(SPI_Type * base,bool enable)509 static inline void DSPI_Enable(SPI_Type *base, bool enable)
510 {
511 if (enable)
512 {
513 base->MCR &= ~SPI_MCR_MDIS_MASK;
514 }
515 else
516 {
517 base->MCR |= SPI_MCR_MDIS_MASK;
518 }
519 }
520
521 /*!
522 *@}
523 */
524
525 /*!
526 * @name Status
527 * @{
528 */
529
530 /*!
531 * @brief Gets the DSPI status flag state.
532 * @param base DSPI peripheral address.
533 * @return DSPI status (in SR register).
534 */
DSPI_GetStatusFlags(SPI_Type * base)535 static inline uint32_t DSPI_GetStatusFlags(SPI_Type *base)
536 {
537 return (base->SR);
538 }
539
540 /*!
541 * @brief Clears the DSPI status flag.
542 *
543 * This function clears the desired status bit by using a write-1-to-clear. The user passes in the base and the
544 * desired status bit to clear. The list of status bits is defined in the <b>dspi_status_and_interrupt_request_t</b>.
545 * The function uses these bit positions in its algorithm to clear the desired flag state. This is an example.
546 * @code
547 * DSPI_ClearStatusFlags(base, kDSPI_TxCompleteFlag|kDSPI_EndOfQueueFlag);
548 * @endcode
549 *
550 * @param base DSPI peripheral address.
551 * @param statusFlags The status flag used from the type dspi_flags.
552 */
DSPI_ClearStatusFlags(SPI_Type * base,uint32_t statusFlags)553 static inline void DSPI_ClearStatusFlags(SPI_Type *base, uint32_t statusFlags)
554 {
555 base->SR = statusFlags; /*!< The status flags are cleared by writing 1 (w1c).*/
556 }
557
558 /*!
559 *@}
560 */
561
562 /*!
563 * @name Interrupts
564 * @{
565 */
566
567 /*!
568 * @brief Enables the DSPI interrupts.
569 *
570 * This function configures various interrupt masks of the DSPI. The parameters are a base and an interrupt mask.
571 * @note For Tx Fill and Rx FIFO drain requests, enable the interrupt request and disable the DMA request.
572 * Do not use this API(write to RSER register) while DSPI is in running state.
573 *
574 * @code
575 * DSPI_EnableInterrupts(base, kDSPI_TxCompleteInterruptEnable | kDSPI_EndOfQueueInterruptEnable );
576 * @endcode
577 *
578 * @param base DSPI peripheral address.
579 * @param mask The interrupt mask; use the enum @ref _dspi_interrupt_enable.
580 */
581 void DSPI_EnableInterrupts(SPI_Type *base, uint32_t mask);
582
583 /*!
584 * @brief Disables the DSPI interrupts.
585 *
586 * @code
587 * DSPI_DisableInterrupts(base, kDSPI_TxCompleteInterruptEnable | kDSPI_EndOfQueueInterruptEnable );
588 * @endcode
589 *
590 * @param base DSPI peripheral address.
591 * @param mask The interrupt mask; use the enum @ref _dspi_interrupt_enable.
592 */
DSPI_DisableInterrupts(SPI_Type * base,uint32_t mask)593 static inline void DSPI_DisableInterrupts(SPI_Type *base, uint32_t mask)
594 {
595 base->RSER &= ~mask;
596 }
597
598 /*!
599 *@}
600 */
601
602 /*!
603 * @name DMA Control
604 * @{
605 */
606
607 /*!
608 * @brief Enables the DSPI DMA request.
609 *
610 * This function configures the Rx and Tx DMA mask of the DSPI. The parameters are a base and a DMA mask.
611 * @code
612 * DSPI_EnableDMA(base, kDSPI_TxDmaEnable | kDSPI_RxDmaEnable);
613 * @endcode
614 *
615 * @param base DSPI peripheral address.
616 * @param mask The interrupt mask; use the enum @ref _dspi_dma_enable.
617 */
DSPI_EnableDMA(SPI_Type * base,uint32_t mask)618 static inline void DSPI_EnableDMA(SPI_Type *base, uint32_t mask)
619 {
620 base->RSER |= mask;
621 }
622
623 /*!
624 * @brief Disables the DSPI DMA request.
625 *
626 * This function configures the Rx and Tx DMA mask of the DSPI. The parameters are a base and a DMA mask.
627 * @code
628 * SPI_DisableDMA(base, kDSPI_TxDmaEnable | kDSPI_RxDmaEnable);
629 * @endcode
630 *
631 * @param base DSPI peripheral address.
632 * @param mask The interrupt mask; use the enum @ref _dspi_dma_enable.
633 */
DSPI_DisableDMA(SPI_Type * base,uint32_t mask)634 static inline void DSPI_DisableDMA(SPI_Type *base, uint32_t mask)
635 {
636 base->RSER &= ~mask;
637 }
638
639 /*!
640 * @brief Gets the DSPI master PUSHR data register address for the DMA operation.
641 *
642 * This function gets the DSPI master PUSHR data register address because this value is needed for the DMA operation.
643 *
644 * @param base DSPI peripheral address.
645 * @return The DSPI master PUSHR data register address.
646 */
DSPI_MasterGetTxRegisterAddress(SPI_Type * base)647 static inline uint32_t DSPI_MasterGetTxRegisterAddress(SPI_Type *base)
648 {
649 return (uint32_t) & (base->PUSHR);
650 }
651
652 /*!
653 * @brief Gets the DSPI slave PUSHR data register address for the DMA operation.
654 *
655 * This function gets the DSPI slave PUSHR data register address as this value is needed for the DMA operation.
656 *
657 * @param base DSPI peripheral address.
658 * @return The DSPI slave PUSHR data register address.
659 */
DSPI_SlaveGetTxRegisterAddress(SPI_Type * base)660 static inline uint32_t DSPI_SlaveGetTxRegisterAddress(SPI_Type *base)
661 {
662 return (uint32_t) & (base->PUSHR_SLAVE);
663 }
664
665 /*!
666 * @brief Gets the DSPI POPR data register address for the DMA operation.
667 *
668 * This function gets the DSPI POPR data register address as this value is needed for the DMA operation.
669 *
670 * @param base DSPI peripheral address.
671 * @return The DSPI POPR data register address.
672 */
DSPI_GetRxRegisterAddress(SPI_Type * base)673 static inline uint32_t DSPI_GetRxRegisterAddress(SPI_Type *base)
674 {
675 return (uint32_t) & (base->POPR);
676 }
677
678 /*!
679 *@}
680 */
681
682 /*!
683 * @name Bus Operations
684 * @{
685 */
686 /*!
687 * @brief Get instance number for DSPI module.
688 *
689 * @param base DSPI peripheral base address.
690 */
691 uint32_t DSPI_GetInstance(SPI_Type *base);
692
693 /*!
694 * @brief Configures the DSPI for master or slave.
695 *
696 * @param base DSPI peripheral address.
697 * @param mode Mode setting (master or slave) of type @ref dspi_master_slave_mode_t.
698 */
DSPI_SetMasterSlaveMode(SPI_Type * base,dspi_master_slave_mode_t mode)699 static inline void DSPI_SetMasterSlaveMode(SPI_Type *base, dspi_master_slave_mode_t mode)
700 {
701 base->MCR = (base->MCR & (~SPI_MCR_MSTR_MASK)) | SPI_MCR_MSTR(mode);
702 }
703
704 /*!
705 * @brief Returns whether the DSPI module is in master mode.
706 *
707 * @param base DSPI peripheral address.
708 * @return Returns true if the module is in master mode or false if the module is in slave mode.
709 */
DSPI_IsMaster(SPI_Type * base)710 static inline bool DSPI_IsMaster(SPI_Type *base)
711 {
712 bool ismaster = false;
713 if (0U != ((base->MCR) & SPI_MCR_MSTR_MASK))
714 {
715 ismaster = true;
716 }
717 return ismaster;
718 }
719 /*!
720 * @brief Starts the DSPI transfers and clears HALT bit in MCR.
721 *
722 * This function sets the module to start data transfer in either master or slave mode.
723 *
724 * @param base DSPI peripheral address.
725 */
DSPI_StartTransfer(SPI_Type * base)726 static inline void DSPI_StartTransfer(SPI_Type *base)
727 {
728 base->MCR &= ~SPI_MCR_HALT_MASK;
729 }
730 /*!
731 * @brief Stops DSPI transfers and sets the HALT bit in MCR.
732 *
733 * This function stops data transfers in either master or slave modes.
734 *
735 * @param base DSPI peripheral address.
736 */
DSPI_StopTransfer(SPI_Type * base)737 static inline void DSPI_StopTransfer(SPI_Type *base)
738 {
739 base->MCR |= SPI_MCR_HALT_MASK;
740 }
741
742 /*!
743 * @brief Enables or disables the DSPI FIFOs.
744 *
745 * This function allows the caller to disable/enable the Tx and Rx FIFOs independently.
746 * @note To disable, pass in a logic 0 (false) for the particular FIFO configuration. To enable,
747 * pass in a logic 1 (true).
748 *
749 * @param base DSPI peripheral address.
750 * @param enableTxFifo Disables (false) the TX FIFO; Otherwise, enables (true) the TX FIFO
751 * @param enableRxFifo Disables (false) the RX FIFO; Otherwise, enables (true) the RX FIFO
752 */
DSPI_SetFifoEnable(SPI_Type * base,bool enableTxFifo,bool enableRxFifo)753 static inline void DSPI_SetFifoEnable(SPI_Type *base, bool enableTxFifo, bool enableRxFifo)
754 {
755 base->MCR = (base->MCR & (~(SPI_MCR_DIS_RXF_MASK | SPI_MCR_DIS_TXF_MASK))) |
756 SPI_MCR_DIS_TXF((false == enableTxFifo ? 1U : 0U)) | SPI_MCR_DIS_RXF((false == enableRxFifo ? 1U : 0U));
757 }
758
759 /*!
760 * @brief Flushes the DSPI FIFOs.
761 *
762 * @param base DSPI peripheral address.
763 * @param flushTxFifo Flushes (true) the Tx FIFO; Otherwise, does not flush (false) the Tx FIFO
764 * @param flushRxFifo Flushes (true) the Rx FIFO; Otherwise, does not flush (false) the Rx FIFO
765 */
DSPI_FlushFifo(SPI_Type * base,bool flushTxFifo,bool flushRxFifo)766 static inline void DSPI_FlushFifo(SPI_Type *base, bool flushTxFifo, bool flushRxFifo)
767 {
768 base->MCR = (base->MCR & (~(SPI_MCR_CLR_TXF_MASK | SPI_MCR_CLR_RXF_MASK))) |
769 SPI_MCR_CLR_TXF((true == flushTxFifo ? 1U : 0U)) | SPI_MCR_CLR_RXF((true == flushRxFifo ? 1U : 0U));
770 }
771
772 /*!
773 * @brief Configures the DSPI peripheral chip select polarity simultaneously.
774 * For example, PCS0 and PCS1 are set to active low and other PCS is set to active high. Note that the number of
775 * PCSs is specific to the device.
776 * @code
777 * DSPI_SetAllPcsPolarity(base, kDSPI_Pcs0ActiveLow | kDSPI_Pcs1ActiveLow);
778 @endcode
779 * @param base DSPI peripheral address.
780 * @param mask The PCS polarity mask; use the enum @ref _dspi_pcs_polarity.
781 */
DSPI_SetAllPcsPolarity(SPI_Type * base,uint32_t mask)782 static inline void DSPI_SetAllPcsPolarity(SPI_Type *base, uint32_t mask)
783 {
784 base->MCR = (base->MCR & ~SPI_MCR_PCSIS_MASK) | SPI_MCR_PCSIS(mask);
785 }
786
787 /*!
788 * @brief Sets the DSPI baud rate in bits per second.
789 *
790 * This function takes in the desired baudRate_Bps (baud rate) and calculates the nearest possible baud rate without
791 * exceeding the desired baud rate, and returns the calculated baud rate in bits-per-second. It requires that the
792 * caller also provide the frequency of the module source clock (in Hertz).
793 *
794 * @param base DSPI peripheral address.
795 * @param whichCtar The desired Clock and Transfer Attributes Register (CTAR) of the type @ref dspi_ctar_selection_t
796 * @param baudRate_Bps The desired baud rate in bits per second
797 * @param srcClock_Hz Module source input clock in Hertz
798 * @return The actual calculated baud rate
799 */
800 uint32_t DSPI_MasterSetBaudRate(SPI_Type *base,
801 dspi_ctar_selection_t whichCtar,
802 uint32_t baudRate_Bps,
803 uint32_t srcClock_Hz);
804
805 /*!
806 * @brief Manually configures the delay prescaler and scaler for a particular CTAR.
807 *
808 * This function configures the PCS to SCK delay pre-scalar (PcsSCK) and scalar (CSSCK), after SCK delay pre-scalar
809 * (PASC) and scalar (ASC), and the delay after transfer pre-scalar (PDT) and scalar (DT).
810 *
811 * These delay names are available in the type @ref dspi_delay_type_t.
812 *
813 * The user passes the delay to the configuration along with the prescaler and scaler value.
814 * This allows the user to directly set the prescaler/scaler values if pre-calculated or
815 * to manually increment either value.
816 *
817 * @param base DSPI peripheral address.
818 * @param whichCtar The desired Clock and Transfer Attributes Register (CTAR) of type @ref dspi_ctar_selection_t.
819 * @param prescaler The prescaler delay value (can be an integer 0, 1, 2, or 3).
820 * @param scaler The scaler delay value (can be any integer between 0 to 15).
821 * @param whichDelay The desired delay to configure; must be of type @ref dspi_delay_type_t
822 */
823 void DSPI_MasterSetDelayScaler(
824 SPI_Type *base, dspi_ctar_selection_t whichCtar, uint32_t prescaler, uint32_t scaler, dspi_delay_type_t whichDelay);
825
826 /*!
827 * @brief Calculates the delay prescaler and scaler based on the desired delay input in nanoseconds.
828 *
829 * This function calculates the values for the following.
830 * PCS to SCK delay pre-scalar (PCSSCK) and scalar (CSSCK), or
831 * After SCK delay pre-scalar (PASC) and scalar (ASC), or
832 * Delay after transfer pre-scalar (PDT) and scalar (DT).
833 *
834 * These delay names are available in the type @ref dspi_delay_type_t.
835 *
836 * The user passes which delay to configure along with the desired delay value in nanoseconds. The function
837 * calculates the values needed for the prescaler and scaler. Note that returning the calculated delay as an exact
838 * delay match may not be possible. In this case, the closest match is calculated without going below the desired
839 * delay value input.
840 * It is possible to input a very large delay value that exceeds the capability of the part, in which case the maximum
841 * supported delay is returned. The higher-level peripheral driver alerts the user of an out of range delay
842 * input.
843 *
844 * @param base DSPI peripheral address.
845 * @param whichCtar The desired Clock and Transfer Attributes Register (CTAR) of type @ref dspi_ctar_selection_t.
846 * @param whichDelay The desired delay to configure, must be of type @ref dspi_delay_type_t
847 * @param srcClock_Hz Module source input clock in Hertz
848 * @param delayTimeInNanoSec The desired delay value in nanoseconds.
849 * @return The actual calculated delay value.
850 */
851 uint32_t DSPI_MasterSetDelayTimes(SPI_Type *base,
852 dspi_ctar_selection_t whichCtar,
853 dspi_delay_type_t whichDelay,
854 uint32_t srcClock_Hz,
855 uint32_t delayTimeInNanoSec);
856
857 /*!
858 * @brief Writes data into the data buffer for master mode.
859 *
860 * In master mode, the 16-bit data is appended to the 16-bit command info. The command portion
861 * provides characteristics of the data, such as the optional continuous chip select
862 * operation between transfers, the desired Clock and Transfer Attributes register to use for the
863 * associated SPI frame, the desired PCS signal to use for the data transfer, whether the current
864 * transfer is the last in the queue, and whether to clear the transfer count (normally needed when
865 * sending the first frame of a data packet). This is an example.
866 * @code
867 * dspi_command_data_config_t commandConfig;
868 * commandConfig.isPcsContinuous = true;
869 * commandConfig.whichCtar = kDSPICtar0;
870 * commandConfig.whichPcs = kDSPIPcs0;
871 * commandConfig.clearTransferCount = false;
872 * commandConfig.isEndOfQueue = false;
873 * DSPI_MasterWriteData(base, &commandConfig, dataWord);
874 @endcode
875 *
876 * @param base DSPI peripheral address.
877 * @param command Pointer to the command structure.
878 * @param data The data word to be sent.
879 */
DSPI_MasterWriteData(SPI_Type * base,dspi_command_data_config_t * command,uint16_t data)880 static inline void DSPI_MasterWriteData(SPI_Type *base, dspi_command_data_config_t *command, uint16_t data)
881 {
882 base->PUSHR = SPI_PUSHR_CONT(command->isPcsContinuous) | SPI_PUSHR_CTAS(command->whichCtar) |
883 SPI_PUSHR_PCS(command->whichPcs) | SPI_PUSHR_EOQ(command->isEndOfQueue) |
884 SPI_PUSHR_CTCNT(command->clearTransferCount) | SPI_PUSHR_TXDATA(data);
885 }
886
887 /*!
888 * @brief Sets the @ref dspi_command_data_config_t structure to default values.
889 *
890 * The purpose of this API is to get the configuration structure initialized for use in the
891 * <b>DSPI_MasterWrite_xx()</b>. Users may use the initialized structure unchanged in the DSPI_MasterWrite_xx() or
892 * modify the structure before calling the DSPI_MasterWrite_xx(). This is an example.
893 * @code
894 * dspi_command_data_config_t command;
895 * DSPI_GetDefaultDataCommandConfig(&command);
896 * @endcode
897 * @param command Pointer to the @ref dspi_command_data_config_t structure.
898 */
899 void DSPI_GetDefaultDataCommandConfig(dspi_command_data_config_t *command);
900
901 /*!
902 * @brief Writes data into the data buffer master mode and waits till complete to return.
903 *
904 * In master mode, the 16-bit data is appended to the 16-bit command info. The command portion
905 * provides characteristics of the data, such as the optional continuous chip select
906 * operation between transfers, the desired Clock and Transfer Attributes register to use for the
907 * associated SPI frame, the desired PCS signal to use for the data transfer, whether the current
908 * transfer is the last in the queue, and whether to clear the transfer count (normally needed when
909 * sending the first frame of a data packet). This is an example.
910 * @code
911 * dspi_command_config_t commandConfig;
912 * commandConfig.isPcsContinuous = true;
913 * commandConfig.whichCtar = kDSPICtar0;
914 * commandConfig.whichPcs = kDSPIPcs1;
915 * commandConfig.clearTransferCount = false;
916 * commandConfig.isEndOfQueue = false;
917 * DSPI_MasterWriteDataBlocking(base, &commandConfig, dataWord);
918 * @endcode
919 *
920 * @note This function does not return until after the transmit is complete. Also note that the DSPI must be
921 * enabled and running to transmit data (MCR[MDIS] & [HALT] = 0). Because the SPI is a synchronous protocol,
922 * the received data is available when the transmit completes.
923 *
924 * @param base DSPI peripheral address.
925 * @param command Pointer to the command structure.
926 * @param data The data word to be sent.
927 */
928 void DSPI_MasterWriteDataBlocking(SPI_Type *base, dspi_command_data_config_t *command, uint16_t data);
929
930 /*!
931 * @brief Returns the DSPI command word formatted to the PUSHR data register bit field.
932 *
933 * This function allows the caller to pass in the data command structure and returns the command word formatted
934 * according to the DSPI PUSHR register bit field placement. The user can then "OR" the returned command word with the
935 * desired data to send and use the function <b>DSPI_HAL_WriteCommandDataMastermode</b> or
936 * <b>DSPI_HAL_WriteCommandDataMastermodeBlocking</b> to write the entire 32-bit command data word to the PUSHR. This
937 * helps improve performance in cases where the command structure is constant. For example, the user calls this function
938 * before starting a transfer to generate the command word. When they are ready to transmit the data, they OR
939 * this formatted command word with the desired data to transmit. This process increases transmit performance when
940 * compared to calling send functions, such as <b>DSPI_HAL_WriteDataMastermode</b>, which format the command word each
941 * time a data word is to be sent.
942 *
943 * @param command Pointer to the command structure.
944 * @return The command word formatted to the PUSHR data register bit field.
945 */
DSPI_MasterGetFormattedCommand(dspi_command_data_config_t * command)946 static inline uint32_t DSPI_MasterGetFormattedCommand(dspi_command_data_config_t *command)
947 {
948 /* Format the 16-bit command word according to the PUSHR data register bit field*/
949 return (uint32_t)(SPI_PUSHR_CONT(command->isPcsContinuous) | SPI_PUSHR_CTAS(command->whichCtar) |
950 SPI_PUSHR_PCS(command->whichPcs) | SPI_PUSHR_EOQ(command->isEndOfQueue) |
951 SPI_PUSHR_CTCNT(command->clearTransferCount));
952 }
953
954 /*!
955 * @brief Writes a 32-bit data word (16-bit command appended with 16-bit data) into the data
956 * buffer master mode and waits till complete to return.
957 *
958 * In this function, the user must append the 16-bit data to the 16-bit command information and then provide the total
959 * 32-bit word
960 * as the data to send.
961 * The command portion provides characteristics of the data, such as the optional continuous chip select operation
962 * between transfers, the desired Clock and Transfer Attributes register to use for the associated SPI frame, the
963 * desired PCS
964 * signal to use for the data transfer, whether the current transfer is the last in the queue, and whether to clear the
965 * transfer count (normally needed when sending the first frame of a data packet). The user is responsible for
966 * appending this command with the data to send. This is an example:
967 * @code
968 * dataWord = <16-bit command> | <16-bit data>;
969 * DSPI_MasterWriteCommandDataBlocking(base, dataWord);
970 * @endcode
971 *
972 * @note This function does not return until after the transmit is complete. Also note that the DSPI must be
973 * enabled and running to transmit data (MCR[MDIS] & [HALT] = 0).
974 * Because the SPI is a synchronous protocol, the received data is available when the transmit completes.
975 *
976 * For a blocking polling transfer, see methods below.
977 * <table>
978 * <tr><th>Option 1
979 * <tr><td>uint32_t command_to_send = DSPI_MasterGetFormattedCommand(&command);
980 * <tr><td>uint32_t data0 = command_to_send | data_need_to_send_0;
981 * <tr><td>uint32_t data1 = command_to_send | data_need_to_send_1;
982 * <tr><td>uint32_t data2 = command_to_send | data_need_to_send_2;
983 * <tr><td>
984 * <tr><td>DSPI_MasterWriteCommandDataBlocking(base,data0);
985 * <tr><td>DSPI_MasterWriteCommandDataBlocking(base,data1);
986 * <tr><td>DSPI_MasterWriteCommandDataBlocking(base,data2);
987 * </table>
988 *
989 * <table>
990 * <tr><th>Option 2
991 * <tr><td>DSPI_MasterWriteDataBlocking(base,&command,data_need_to_send_0);
992 * <tr><td>DSPI_MasterWriteDataBlocking(base,&command,data_need_to_send_1);
993 * <tr><td>DSPI_MasterWriteDataBlocking(base,&command,data_need_to_send_2);
994 * </table>
995 *
996 * @param base DSPI peripheral address.
997 * @param data The data word (command and data combined) to be sent.
998 */
999 void DSPI_MasterWriteCommandDataBlocking(SPI_Type *base, uint32_t data);
1000
1001 /*!
1002 * @brief Writes data into the data buffer in slave mode.
1003 *
1004 * In slave mode, up to 16-bit words may be written.
1005 *
1006 * @param base DSPI peripheral address.
1007 * @param data The data to send.
1008 */
DSPI_SlaveWriteData(SPI_Type * base,uint32_t data)1009 static inline void DSPI_SlaveWriteData(SPI_Type *base, uint32_t data)
1010 {
1011 base->PUSHR_SLAVE = data;
1012 }
1013
1014 /*!
1015 * @brief Writes data into the data buffer in slave mode, waits till data was transmitted, and returns.
1016 *
1017 * In slave mode, up to 16-bit words may be written. The function first clears the transmit complete flag, writes data
1018 * into data register, and finally waits until the data is transmitted.
1019 *
1020 * @param base DSPI peripheral address.
1021 * @param data The data to send.
1022 */
1023 void DSPI_SlaveWriteDataBlocking(SPI_Type *base, uint32_t data);
1024
1025 /*!
1026 * @brief Reads data from the data buffer.
1027 *
1028 * @param base DSPI peripheral address.
1029 * @return The data from the read data buffer.
1030 */
DSPI_ReadData(SPI_Type * base)1031 static inline uint32_t DSPI_ReadData(SPI_Type *base)
1032 {
1033 return (base->POPR);
1034 }
1035
1036 /*!
1037 * @brief Set up the dummy data.
1038 *
1039 * @param base DSPI peripheral address.
1040 * @param dummyData Data to be transferred when tx buffer is NULL.
1041 */
1042 void DSPI_SetDummyData(SPI_Type *base, uint8_t dummyData);
1043
1044 /*!
1045 *@}
1046 */
1047
1048 /*!
1049 * @name Transactional APIs
1050 * @{
1051 */
1052
1053 /*!
1054 * @brief Initializes the DSPI master handle.
1055 *
1056 * This function initializes the DSPI handle, which can be used for other DSPI transactional APIs. Usually, for a
1057 * specified DSPI instance, call this API once to get the initialized handle.
1058 *
1059 * @param base DSPI peripheral base address.
1060 * @param handle DSPI handle pointer to @ref _dspi_master_handle.
1061 * @param callback DSPI callback.
1062 * @param userData Callback function parameter.
1063 */
1064 void DSPI_MasterTransferCreateHandle(SPI_Type *base,
1065 dspi_master_handle_t *handle,
1066 dspi_master_transfer_callback_t callback,
1067 void *userData);
1068
1069 /*!
1070 * @brief DSPI master transfer data using polling.
1071 *
1072 * This function transfers data using polling. This is a blocking function, which does not return until all transfers
1073 * have been completed.
1074 *
1075 * @param base DSPI peripheral base address.
1076 * @param transfer Pointer to the @ref dspi_transfer_t structure.
1077 * @return status of status_t.
1078 */
1079 status_t DSPI_MasterTransferBlocking(SPI_Type *base, dspi_transfer_t *transfer);
1080
1081 /*!
1082 * @brief DSPI master transfer data using interrupts.
1083 *
1084 * This function transfers data using interrupts. This is a non-blocking function, which returns right away. When all
1085 * data is transferred, the callback function is called.
1086
1087 * @param base DSPI peripheral base address.
1088 * @param handle Pointer to the @ref _dspi_master_handle structure which stores the transfer state.
1089 * @param transfer Pointer to the @ref dspi_transfer_t structure.
1090 * @return status of status_t.
1091 */
1092 status_t DSPI_MasterTransferNonBlocking(SPI_Type *base, dspi_master_handle_t *handle, dspi_transfer_t *transfer);
1093
1094 /*!
1095 * @brief Transfers a block of data using a polling method.
1096 *
1097 * This function will do a half-duplex transfer for DSPI master, This is a blocking function,
1098 * which does not retuen until all transfer have been completed. And data transfer will be half-duplex,
1099 * users can set transmit first or receive first.
1100 *
1101 * @param base DSPI base pointer
1102 * @param xfer pointer to @ref dspi_half_duplex_transfer_t structure
1103 * @return status of status_t.
1104 */
1105 status_t DSPI_MasterHalfDuplexTransferBlocking(SPI_Type *base, dspi_half_duplex_transfer_t *xfer);
1106
1107 /*!
1108 * @brief Performs a non-blocking DSPI interrupt transfer.
1109 *
1110 * This function transfers data using interrupts, the transfer mechanism is half-duplex. This is a non-blocking
1111 * function,
1112 * which returns right away. When all data is transferred, the callback function is called.
1113 *
1114 * @param base DSPI peripheral base address.
1115 * @param handle pointer to @ref _dspi_master_handle structure which stores the transfer state
1116 * @param xfer pointer to @ref dspi_half_duplex_transfer_t structure
1117 * @return status of status_t.
1118 */
1119 status_t DSPI_MasterHalfDuplexTransferNonBlocking(SPI_Type *base,
1120 dspi_master_handle_t *handle,
1121 dspi_half_duplex_transfer_t *xfer);
1122
1123 /*!
1124 * @brief Gets the master transfer count.
1125 *
1126 * This function gets the master transfer count.
1127 *
1128 * @param base DSPI peripheral base address.
1129 * @param handle Pointer to the @ref _dspi_master_handle structure which stores the transfer state.
1130 * @param count The number of bytes transferred by using the non-blocking transaction.
1131 * @return status of status_t.
1132 */
1133 status_t DSPI_MasterTransferGetCount(SPI_Type *base, dspi_master_handle_t *handle, size_t *count);
1134
1135 /*!
1136 * @brief DSPI master aborts a transfer using an interrupt.
1137 *
1138 * This function aborts a transfer using an interrupt.
1139 *
1140 * @param base DSPI peripheral base address.
1141 * @param handle Pointer to the @ref _dspi_master_handle structure which stores the transfer state.
1142 */
1143 void DSPI_MasterTransferAbort(SPI_Type *base, dspi_master_handle_t *handle);
1144
1145 /*!
1146 * @brief DSPI Master IRQ handler function.
1147 *
1148 * This function processes the DSPI transmit and receive IRQ.
1149
1150 * @param base DSPI peripheral base address.
1151 * @param handle Pointer to the @ref _dspi_master_handle structure which stores the transfer state.
1152 */
1153 void DSPI_MasterTransferHandleIRQ(SPI_Type *base, dspi_master_handle_t *handle);
1154
1155 /*!
1156 * @brief Initializes the DSPI slave handle.
1157 *
1158 * This function initializes the DSPI handle, which can be used for other DSPI transactional APIs. Usually, for a
1159 * specified DSPI instance, call this API once to get the initialized handle.
1160 *
1161 * @param handle DSPI handle pointer to the @ref _dspi_slave_handle.
1162 * @param base DSPI peripheral base address.
1163 * @param callback DSPI callback.
1164 * @param userData Callback function parameter.
1165 */
1166 void DSPI_SlaveTransferCreateHandle(SPI_Type *base,
1167 dspi_slave_handle_t *handle,
1168 dspi_slave_transfer_callback_t callback,
1169 void *userData);
1170
1171 /*!
1172 * @brief DSPI slave transfers data using an interrupt.
1173 *
1174 * This function transfers data using an interrupt. This is a non-blocking function, which returns right away. When all
1175 * data is transferred, the callback function is called.
1176 *
1177 * @param base DSPI peripheral base address.
1178 * @param handle Pointer to the @ref _dspi_slave_handle structure which stores the transfer state.
1179 * @param transfer Pointer to the @ref dspi_transfer_t structure.
1180 * @return status of status_t.
1181 */
1182 status_t DSPI_SlaveTransferNonBlocking(SPI_Type *base, dspi_slave_handle_t *handle, dspi_transfer_t *transfer);
1183
1184 /*!
1185 * @brief Gets the slave transfer count.
1186 *
1187 * This function gets the slave transfer count.
1188 *
1189 * @param base DSPI peripheral base address.
1190 * @param handle Pointer to the @ref _dspi_master_handle structure which stores the transfer state.
1191 * @param count The number of bytes transferred by using the non-blocking transaction.
1192 * @return status of status_t.
1193 */
1194 status_t DSPI_SlaveTransferGetCount(SPI_Type *base, dspi_slave_handle_t *handle, size_t *count);
1195
1196 /*!
1197 * @brief DSPI slave aborts a transfer using an interrupt.
1198 *
1199 * This function aborts a transfer using an interrupt.
1200 *
1201 * @param base DSPI peripheral base address.
1202 * @param handle Pointer to the @ref _dspi_slave_handle structure which stores the transfer state.
1203 */
1204 void DSPI_SlaveTransferAbort(SPI_Type *base, dspi_slave_handle_t *handle);
1205
1206 /*!
1207 * @brief DSPI Master IRQ handler function.
1208 *
1209 * This function processes the DSPI transmit and receive IRQ.
1210 *
1211 * @param base DSPI peripheral base address.
1212 * @param handle Pointer to the @ref _dspi_slave_handle structure which stores the transfer state.
1213 */
1214 void DSPI_SlaveTransferHandleIRQ(SPI_Type *base, dspi_slave_handle_t *handle);
1215
1216 /*!
1217 * brief Dummy data for each instance.
1218 *
1219 * The purpose of this API is to avoid MISRA rule8.5 : Multiple declarations of
1220 * externally-linked object or function @ref g_dspiDummyData.
1221 *
1222 * param base DSPI peripheral base address.
1223 */
1224 uint8_t DSPI_GetDummyDataInstance(SPI_Type *base);
1225
1226 /*!
1227 *@}
1228 */
1229
1230 #if defined(__cplusplus)
1231 }
1232 #endif /*_cplusplus*/
1233 /*!
1234 *@}
1235 */
1236
1237 #endif /*_FSL_DSPI_H_*/
1238
