1 /*
2 * Copyright (c) 2017 - 2023, Nordic Semiconductor ASA
3 * All rights reserved.
4 *
5 * SPDX-License-Identifier: BSD-3-Clause
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright notice, this
11 * list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the copyright holder nor the names of its
18 * contributors may be used to endorse or promote products derived from this
19 * software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 #ifndef NRFX_COMMON_H__
35 #define NRFX_COMMON_H__
36
37 #include <stdint.h>
38 #include <stddef.h>
39 #include <stdbool.h>
40 #include <string.h>
41 #include <limits.h>
42
43 #include <nrf.h>
44 #include "nrfx_utils.h"
45 #include <nrf_peripherals.h>
46 #include "nrfx_ext.h"
47
48 #ifdef __cplusplus
49 extern "C" {
50 #endif
51
52 #if defined(__CORTEX_M) || defined(__NRFX_DOXYGEN__)
53 #define ISA_ARM 1
54 #elif defined(__VPR_REV)
55 #define ISA_RISCV 1
56 #else
57 #define ISA_UNKNOWN 1
58 #endif
59
60 #if defined(ISA_RISCV)
61 #define __STATIC_INLINE static inline
62 #endif
63
64 #ifndef NRFX_STATIC_INLINE
65 #ifdef NRFX_DECLARE_ONLY
66 #define NRFX_STATIC_INLINE
67 #else
68 #define NRFX_STATIC_INLINE __STATIC_INLINE
69 #endif
70 #endif // NRFX_STATIC_INLINE
71
72 #define NRFY_STATIC_INLINE __STATIC_INLINE
73
74 #ifndef NRF_STATIC_INLINE
75 #ifdef NRF_DECLARE_ONLY
76 #define NRF_STATIC_INLINE
77 #else
78 #define NRF_STATIC_INLINE __STATIC_INLINE
79 #endif
80 #endif // NRF_STATIC_INLINE
81
82 /**
83 * @defgroup nrfx_common Common module
84 * @{
85 * @ingroup nrfx
86 * @brief Common module.
87 */
88
89 /**
90 * @brief Macro for checking if the specified identifier is defined and it has
91 * a non-zero value.
92 *
93 * Normally, preprocessors treat all undefined identifiers as having the value
94 * zero. However, some tools, like static code analyzers, can issue a warning
95 * when such identifier is evaluated. This macro gives the possibility to suppress
96 * such warnings only in places where this macro is used for evaluation, not in
97 * the whole analyzed code.
98 */
99 #define NRFX_CHECK(module_enabled) (module_enabled)
100
101 /**
102 * @brief Macro for checking if the configured API version is greater than or equal
103 * to the specified API version.
104 *
105 * @note API version to be used is configured using following symbols:
106 * - @ref NRFX_CONFIG_API_VER_MAJOR
107 * - @ref NRFX_CONFIG_API_VER_MINOR
108 * - @ref NRFX_CONFIG_API_VER_MICRO
109 *
110 * @param[in] major Major API version.
111 * @param[in] minor Minor API version.
112 * @param[in] micro Micro API version.
113 *
114 * @retval true Configured API version is greater than or equal to the specified API version.
115 * @retval false Configured API version is smaller than the specified API version.
116 */
117 #define NRFX_API_VER_AT_LEAST(major, minor, micro) \
118 ((NRFX_CONFIG_API_VER_MAJOR >= (major)) && \
119 (NRFX_CONFIG_API_VER_MINOR >= (minor)) && \
120 (NRFX_CONFIG_API_VER_MICRO >= (micro)))
121
122 /**
123 * @brief Macro for creating unsigned integer with bit position @p x set.
124 *
125 * @param[in] x Bit position to be set.
126 *
127 * @return Unsigned integer with requested bit position set.
128 */
129 #define NRFX_BIT(x) (1UL << (x))
130
131 /**
132 * @brief Macro for returning bit mask or 0 if @p x is 0.
133 *
134 * @param[in] x Bit mask size. Bit mask has bits 0 through x-1 (inclusive) set.
135 *
136 * @return Bit mask.
137 */
138 #define NRFX_BIT_MASK(x) (((x) == 32) ? UINT32_MAX : ((1UL << x) - 1))
139
140 /**
141 * @brief Macro for returning size in bits for given size in bytes.
142 *
143 * @param[in] x Size in bytes.
144 *
145 * @return Size in bits.
146 */
147 #define NRFX_BIT_SIZE(x) ((x) << 3)
148
149 /**
150 * @brief Macro for concatenating two tokens in macro expansion.
151 *
152 * @note This macro is expanded in two steps so that tokens given as macros
153 * themselves are fully expanded before they are merged.
154 *
155 * @param[in] p1 First token.
156 * @param[in] p2 Second token.
157 *
158 * @return The two tokens merged into one, unless they cannot together form
159 * a valid token (in such case, the preprocessor issues a warning and
160 * does not perform the concatenation).
161 *
162 * @sa NRFX_CONCAT_3
163 */
164 #define NRFX_CONCAT_2(p1, p2) NRFX_CONCAT_2_(p1, p2)
165
166 /** @brief Internal macro used by @ref NRFX_CONCAT_2 to perform the expansion in two steps. */
167 #define NRFX_CONCAT_2_(p1, p2) p1 ## p2
168
169 /**
170 * @brief Macro for concatenating three tokens in macro expansion.
171 *
172 * @note This macro is expanded in two steps so that tokens given as macros
173 * themselves are fully expanded before they are merged.
174 *
175 * @param[in] p1 First token.
176 * @param[in] p2 Second token.
177 * @param[in] p3 Third token.
178 *
179 * @return The three tokens merged into one, unless they cannot together form
180 * a valid token (in such case, the preprocessor issues a warning and
181 * does not perform the concatenation).
182 *
183 * @sa NRFX_CONCAT_2
184 */
185 #define NRFX_CONCAT_3(p1, p2, p3) NRFX_CONCAT_3_(p1, p2, p3)
186
187 /** @brief Internal macro used by @ref NRFX_CONCAT_3 to perform the expansion in two steps. */
188 #define NRFX_CONCAT_3_(p1, p2, p3) p1 ## p2 ## p3
189
190 /**
191 * @brief Macro for computing the absolute value of an integer number.
192 *
193 * @param[in] a Input value.
194 *
195 * @return Absolute value.
196 */
197 #define NRFX_ABS(a) ((a) < (0) ? -(a) : (a))
198
199 /**
200 * @brief Macro for checking whether any of the instance of the specified peripheral supports a given feature.
201 *
202 * Macro checks flags set in \<device\>_peripherals.h file.
203 *
204 * Macro supports check on instances with following names:
205 * - \<periph_name\>0 - \<periph_name\>255 - e.g. SPIM0, SPIM255
206 * - \<periph_name\>00 - \<periph_name\>099 - e.g. SPIM00, SPIM099
207 * - \<periph_name\>000 - \<periph_name\>009 - e.g. SPIM000, SPIM009
208 *
209 * @param[in] periph_name Peripheral name, e.g. SPIM.
210 * @param[in] feature_name Feature flag name suffix following an instance name, e.g.
211 * _FEATURE_HARDWARE_CSN_PRESENT.
212 *
213 * @retval 1 At least one instance on current device supports a given feature.
214 * @retval 0 None of peripheral instances supports a given feature.
215 */
216 #define NRFX_FEATURE_PRESENT(periph_name, feature_name) \
217 NRFX_COND_CODE_0(NRFX_CONCAT(0, \
218 _NRFX_FEATURE_PRESENT(periph_name, feature_name, 256), \
219 _NRFX_FEATURE_PRESENT(NRFX_CONCAT(periph_name, 0), feature_name, 100), \
220 _NRFX_FEATURE_PRESENT(NRFX_CONCAT(periph_name, 00), feature_name, 10) \
221 ), \
222 (0), (1))
223
224 /**
225 * @brief Macro for resolving provided user macro for enabled instances of a driver.
226 *
227 * Macro checks if driver instances are enabled for all potential instaces of a
228 * peripheral. It takes peripheral name and checks whether NRFX_\<peripheral\>\<id\>_ENABLED
229 * is set to 1 and if yes then provided macro is evaluated for given instance.
230 *
231 * Macro supports check on instances with following names:
232 * - \<periph_name\>0 - \<periph_name\>255 - e.g. SPIM0, SPIM255
233 * - \<periph_name\>00 - \<periph_name\>099 - e.g. SPIM00, SPIM099
234 * - \<periph_name\>000 - \<periph_name\>009 - e.g. SPIM000, SPIM009
235 *
236 * @param[in] periph_name Peripheral name, e.g. SPIM.
237 * @param[in] macro Macro which is resolved if driver instance is enabled. Macro has following
238 * arguments: macro(periph_name, prefix, i, ...).
239 * @param[in] sep Separator added between all evaluations, in parentheses.
240 * @param[in] off_code Code injected for disabled instances, in parentheses.
241 */
242 #define NRFX_FOREACH_ENABLED(periph_name, macro, sep, off_code, ...) \
243 NRFX_LISTIFY(256, _NRFX_EVAL_IF_ENABLED, sep, \
244 off_code, periph_name, , macro, __VA_ARGS__) NRFX_DEBRACKET sep \
245 NRFX_LISTIFY(100, _NRFX_EVAL_IF_ENABLED, sep, \
246 off_code, periph_name, 0, macro, __VA_ARGS__) NRFX_DEBRACKET sep \
247 NRFX_LISTIFY(10, _NRFX_EVAL_IF_ENABLED, sep, \
248 off_code, periph_name, 00, macro, __VA_ARGS__)
249
250 /**
251 * @brief Macro for resolving provided user macro for present instances of a peripheral.
252 *
253 * Macro checks if peripheral instances are present by checking if there is
254 * \<peripheral\>\<id\>_PRESENT define set to 1.
255 *
256 * Macro supports check on instances with following names:
257 * - \<periph_name\>0 - \<periph_name\>255 - e.g. SPIM0, SPIM255
258 * - \<periph_name\>00 - \<periph_name\>099 - e.g. SPIM00, SPIM099
259 * - \<periph_name\>000 - \<periph_name\>009 - e.g. SPIM000, SPIM009
260 * - \<periph_name\> - e.g. SPIM
261 *
262 * @param[in] periph_name Peripheral name, e.g. SPIM.
263 * @param[in] macro Macro which is resolved if peripheral instance is present.
264 * Macro has following arguments: macro(periph_name, prefix, i, ...).
265 * @param[in] sep Separator added between all evaluations, in parentheses.
266 * @param[in] off_code Code injected for disabled instances, in parentheses.
267 */
268 #define NRFX_FOREACH_PRESENT(periph_name, macro, sep, off_code, ...) \
269 NRFX_LISTIFY(256, _NRFX_EVAL_IF_PRESENT, sep, \
270 off_code, periph_name, , macro, __VA_ARGS__) NRFX_DEBRACKET sep \
271 NRFX_LISTIFY(100, _NRFX_EVAL_IF_PRESENT, sep, \
272 off_code, periph_name, 0, macro, __VA_ARGS__) NRFX_DEBRACKET sep \
273 NRFX_LISTIFY(10, _NRFX_EVAL_IF_PRESENT, sep, \
274 off_code, periph_name, 00, macro, __VA_ARGS__) NRFX_DEBRACKET sep \
275 _NRFX_EVAL_IF_PRESENT(, off_code, periph_name, , macro, __VA_ARGS__)
276
277 /**
278 * @brief Macro for resolving provided user macro on concatenated peripheral name
279 * and instance index.
280 *
281 * Execute provided macro with single argument <instance\>
282 * that is the concatenation of @p periph_name, @p prefix and @p i.
283 *
284 * @param[in] i Instance index.
285 * @param[in] periph_name Peripheral name, e.g. SPIM.
286 * @param[in] prefix Prefix added before instance index, e.g. some device has
287 * instances named like SPIM00. First 0 is passed here as prefix.
288 * @param[in] macro Macro which is executed.
289 * @param[in] ... Variable length arguments passed to the @p macro. Macro has following
290 * arguments: macro(instance, ...).
291 */
292 #define NRFX_INSTANCE_CONCAT(periph_name, prefix, i, macro, ...) \
293 macro(NRFX_CONCAT(periph_name, prefix, i), __VA_ARGS__)
294
295 /**
296 * @brief Macro for creating a content for enum which is listing enabled driver instances.
297 *
298 * It creates comma separated list of entries like NRFX_\<instance_name\>_INST_IDX,
299 * e.g. (NRFX_SPIM0_INST_IDX) for all enabled instances (NRFX_\<instance_name\>_ENABLED
300 * is set to 1). It should be called within enum declaration. Created enum is used
301 * by the driver to index all enabled instances of the driver.
302 *
303 * @param[in] periph_name Peripheral name (e.g. SPIM).
304 */
305 #define NRFX_INSTANCE_ENUM_LIST(periph_name) \
306 NRFX_FOREACH_ENABLED(periph_name, _NRFX_INST_ENUM, (), ())
307
308 /**
309 * @brief Macro for creating an interrupt handler for all enabled driver instances.
310 *
311 * Macro creates a set of functions which calls generic @p irq_handler function with two parameters:
312 * - peripheral instance register pointer
313 * - pointer to a control block structure associated with the given instance
314 *
315 * Generic interrupt handler function with above mentioned parameters named @p irq_handler
316 * must be implemented in the driver.
317 *
318 * @note Handlers are using enum which should be generated using @ref NRFX_INSTANCE_ENUM_LIST.
319 *
320 * @param[in] periph_name Peripheral name, e.g. SPIM.
321 * @param[in] periph_name_small Peripheral name written with small letters, e.g. spim.
322 */
323 #define NRFX_INSTANCE_IRQ_HANDLERS(periph_name, periph_name_small) \
324 NRFX_FOREACH_ENABLED(periph_name, _NRFX_IRQ_HANDLER, (), (), periph_name_small)
325
326 /**
327 * @brief Macro for creating an interrupt handler for all enabled driver instances
328 * with the specified extra parameter.
329 *
330 * Macro creates set of function which calls generic @p irq_handler function with three parameters:
331 * - peripheral instance register pointer
332 * - pointer to a control block structure associated with the given instance
333 * - provided @p ext_macro called with peripheral name suffix (e.g. 01 for TIMER01)
334 *
335 * Generic interrupt handler function with above mentioned parameters named @p irq_handler
336 * must be implemented in the driver.
337 *
338 * @note Handlers are using enum which should be generated using @ref NRFX_INSTANCE_ENUM_LIST.
339 *
340 * @param[in] periph_name Peripheral name, e.g. SPIM.
341 * @param[in] periph_name_small Peripheral name written with small letters, e.g. rtc.
342 * @param[in] ext_macro External macro to be executed for each instance.
343 */
344 #define NRFX_INSTANCE_IRQ_HANDLERS_EXT(periph_name, periph_name_small, ext_macro) \
345 NRFX_FOREACH_ENABLED(periph_name, _NRFX_IRQ_HANDLER_EXT, (), (), periph_name_small, ext_macro)
346
347 /**
348 * @brief Macro for declaring an interrupt handler for all enabled driver instances.
349 *
350 * Macro creates set of function declarations. It is intended to be used in the driver header.
351 *
352 * @param[in] periph_name Peripheral name, e.g. SPIM.
353 * @param[in] periph_name_small Peripheral name written with small letters, e.g. spim.
354 */
355 #define NRFX_INSTANCE_IRQ_HANDLERS_DECLARE(periph_name, periph_name_small) \
356 NRFX_FOREACH_ENABLED(periph_name, _NRFX_IRQ_HANDLER_DECLARE, (), (), periph_name_small)
357
358 /**
359 * @brief Macro for generating comma-separated list of interrupt handlers for all
360 * enabled driver instances.
361 *
362 * Interrupt handlers are generated using @ref NRFX_INSTANCE_IRQ_HANDLERS.
363 * It is intended to be used to create a list which is used for passing an interrupt
364 * handler function to the PRS driver.
365 *
366 * @param[in] periph_name Peripheral name, e.g. SPIM.
367 * @param[in] periph_name_small Peripheral name written with small letters, e.g. spim.
368 */
369 #define NRFX_INSTANCE_IRQ_HANDLERS_LIST(periph_name, periph_name_small) \
370 NRFX_FOREACH_ENABLED(periph_name, _NRFX_IRQ_HANDLER_LIST, (), (), periph_name_small)
371
372 /**
373 * @brief Macro for checking if given peripheral instance is present on the target.
374 *
375 * Macro utilizes the fact that for each existing instance a define is created which points to
376 * the memory mapped register set casted to a register set structure. It is wrapped in parenthesis
377 * and existance of parethesis wrapping is used to determine if instance exists. It if does not
378 * exist then token (e.g. NRF_SPIM10) is undefined so it does not have parenthesis wrapping.
379 *
380 * Since macro returns literal 1 it can be used by other macros.
381 *
382 * @param[in] _inst Instance, .e.g SPIM10.
383 *
384 * @retval 1 If instance is present.
385 * @retval 0 If instance is not present.
386 */
387 #define NRFX_INSTANCE_PRESENT(_inst) NRFX_ARG_HAS_PARENTHESIS(NRFX_CONCAT(NRF_, _inst))
388
389 /**
390 * @brief Macro for getting the smaller value between two arguments.
391 *
392 * @param[in] a First argument.
393 * @param[in] b Second argument.
394 *
395 * @return Smaller value between two arguments.
396 */
397 #define NRFX_MIN(a, b) ((a) < (b) ? (a) : (b))
398
399 /**
400 * @brief Macro for getting the larger value between two arguments.
401 *
402 * @param[in] a First argument.
403 * @param[in] b Second argument.
404 *
405 * @return Larger value between two arguments.
406 */
407 #define NRFX_MAX(a, b) ((a) > (b) ? (a) : (b))
408
409 /**
410 * @brief Macro for performing rounded integer division (as opposed to
411 * truncating the result).
412 *
413 * @param[in] a Numerator.
414 * @param[in] b Denominator.
415 *
416 * @return Rounded (integer) result of dividing @c a by @c b.
417 */
418 #define NRFX_ROUNDED_DIV(a, b) \
419 ((((a) < 0) ^ ((b) < 0)) ? (((a) - (b) / 2) / (b)) : (((a) + (b) / 2) / (b)))
420
421 /**
422 * @brief Macro for performing integer division, making sure the result is rounded up.
423 *
424 * @details A typical use case for this macro is to compute the number of objects
425 * with size @c b required to hold @c a number of bytes.
426 *
427 * @param[in] a Numerator.
428 * @param[in] b Denominator.
429 *
430 * @return Integer result of dividing @c a by @c b, rounded up.
431 */
432 #define NRFX_CEIL_DIV(a, b) ((((a) - 1) / (b)) + 1)
433
434 /**
435 * @brief Macro for getting the number of elements in an array.
436 *
437 * @param[in] array Name of the array.
438 *
439 * @return Array element count.
440 */
441 #define NRFX_ARRAY_SIZE(array) (sizeof(array) / sizeof((array)[0]))
442
443 /**
444 * @brief Macro for getting the offset (in bytes) from the beginning of a structure
445 * of the specified type to its specified member.
446 *
447 * @param[in] type Structure type.
448 * @param[in] member Structure member whose offset is searched for.
449 *
450 * @return Member offset in bytes.
451 */
452 #define NRFX_OFFSETOF(type, member) ((size_t) & (((type *)0)->member))
453
454 /**
455 * @brief Macro for checking whether given number is power of 2.
456 *
457 * @param[in] val Tested value.
458 *
459 * @retval true The value is power of 2.
460 * @retval false The value is not power of 2.
461 */
462 #define NRFX_IS_POWER_OF_TWO(val) (((val) != 0) && ((val) & ((val) - 1)) == 0)
463
464 /**
465 * @brief Macro for checking whether a given number is even.
466 *
467 * @param[in] val Tested value.
468 *
469 * @retval true The value is even.
470 * @retval false The value is odd.
471 */
472 #define NRFX_IS_EVEN(val) (((val) % 2) == 0)
473
474 /**
475 * @brief Macro for checking if given lengths of EasyDMA transfers do not exceed
476 * the limit of the specified peripheral.
477 *
478 * @param[in] peripheral Peripheral to check the lengths against.
479 * @param[in] length1 First length to be checked.
480 * @param[in] length2 Second length to be checked (pass 0 if not needed).
481 *
482 * @retval true The length of buffers does not exceed the limit of the specified peripheral.
483 * @retval false The length of buffers exceeds the limit of the specified peripheral.
484 */
485 #define NRFX_EASYDMA_LENGTH_VALIDATE(peripheral, length1, length2) \
486 (((length1) < (1U << NRFX_CONCAT_2(peripheral, _EASYDMA_MAXCNT_SIZE))) && \
487 ((length2) < (1U << NRFX_CONCAT_2(peripheral, _EASYDMA_MAXCNT_SIZE))))
488
489 /**
490 * @brief Macro for waiting until condition is met.
491 *
492 * @param[in] condition Condition to meet.
493 * @param[in] attempts Maximum number of condition checks. Must not be 0.
494 * @param[in] delay_us Delay between consecutive checks, in microseconds.
495 * @param[out] result Boolean variable to store the result of the wait process.
496 * Set to true if the condition is met or false otherwise.
497 */
498 #define NRFX_WAIT_FOR(condition, attempts, delay_us, result) \
499 do { \
500 result = false; \
501 uint32_t remaining_attempts = (attempts); \
502 do { \
503 if (condition) \
504 { \
505 result = true; \
506 break; \
507 } \
508 NRFX_DELAY_US(delay_us); \
509 } while (--remaining_attempts); \
510 } while(0)
511
512 /**
513 * @brief Macro for getting the ID number of the specified peripheral.
514 *
515 * For peripherals in Nordic SoCs, there is a direct relationship between their
516 * ID numbers and their base addresses. See the chapter "Peripheral interface"
517 * (section "Peripheral ID") in the Product Specification.
518 *
519 * @param[in] base_addr Peripheral base address or pointer.
520 *
521 * @return ID number associated with the specified peripheral.
522 */
523 #define NRFX_PERIPHERAL_ID_GET(base_addr) (uint16_t)(((uint32_t)(base_addr) >> 12) & 0x000001FF)
524
525 /**
526 * @brief Macro for getting the interrupt number assigned to a specific
527 * peripheral.
528 *
529 * For peripherals in Nordic SoCs, the IRQ number assigned to a peripheral is
530 * equal to its ID number. See the chapter "Peripheral interface" (sections
531 * "Peripheral ID" and "Interrupts") in the Product Specification.
532 *
533 * @param[in] base_addr Peripheral base address or pointer.
534 *
535 * @return Interrupt number associated with the specified peripheral.
536 */
537 #define NRFX_IRQ_NUMBER_GET(base_addr) NRFX_PERIPHERAL_ID_GET(base_addr)
538
539 /**
540 * @brief Macro for converting frequency in kHz to Hz.
541 *
542 * @param[in] freq Frequency value in kHz.
543 *
544 * @return Number of Hz in @p freq kHz.
545 */
546 #define NRFX_KHZ_TO_HZ(freq) ((freq) * 1000)
547
548 /**
549 * @brief Macro for converting frequency in MHz to Hz.
550 *
551 * @param[in] freq Frequency value in MHz.
552 *
553 * @return Number of Hz in @p freq MHz.
554 */
555 #define NRFX_MHZ_TO_HZ(freq) ((freq) * 1000 * 1000)
556
557 /** @brief IRQ handler type. */
558 typedef void (* nrfx_irq_handler_t)(void);
559
560 /** @brief Driver state. */
561 typedef enum
562 {
563 NRFX_DRV_STATE_UNINITIALIZED, ///< Uninitialized.
564 NRFX_DRV_STATE_INITIALIZED, ///< Initialized but powered off.
565 NRFX_DRV_STATE_POWERED_ON, ///< Initialized and powered on.
566 } nrfx_drv_state_t;
567
568 /**
569 * @brief Function for checking if an object is placed in the Data RAM region.
570 *
571 * Several peripherals (the ones using EasyDMA) require the transfer buffers
572 * to be placed in the Data RAM region. This function can be used to check if
573 * this condition is met.
574 *
575 * @param[in] p_object Pointer to an object whose location is to be checked.
576 *
577 * @retval true The pointed object is located in the Data RAM region.
578 * @retval false The pointed object is not located in the Data RAM region.
579 */
580 NRF_STATIC_INLINE bool nrfx_is_in_ram(void const * p_object);
581
582 /**
583 * @brief Function for checking if an object is aligned to a 32-bit word
584 *
585 * Several peripherals (the ones using EasyDMA) require the transfer buffers
586 * to be aligned to a 32-bit word. This function can be used to check if
587 * this condition is met.
588 *
589 * @param[in] p_object Pointer to an object whose location is to be checked.
590 *
591 * @retval true The pointed object is aligned to a 32-bit word.
592 * @retval false The pointed object is not aligned to a 32-bit word.
593 */
594 NRF_STATIC_INLINE bool nrfx_is_word_aligned(void const * p_object);
595
596 /**
597 * @brief Function for getting the interrupt number for the specified peripheral.
598 *
599 * @param[in] p_reg Peripheral base pointer.
600 *
601 * @return Interrupt number associated with the pointed peripheral.
602 */
603 NRF_STATIC_INLINE IRQn_Type nrfx_get_irq_number(void const * p_reg);
604
605 /**
606 * @brief Function for converting an INTEN register bit position to the
607 * corresponding event identifier.
608 *
609 * The event identifier is the offset between the event register address and
610 * the peripheral base address, and is equal (thus, can be directly cast) to
611 * the corresponding value of the enumerated type from HAL (nrf_*_event_t).
612 *
613 * @param[in] bit INTEN register bit position.
614 *
615 * @return Event identifier.
616 *
617 * @sa nrfx_event_to_bitpos
618 */
619 NRF_STATIC_INLINE uint32_t nrfx_bitpos_to_event(uint32_t bit);
620
621 /**
622 * @brief Function for converting an event identifier to the corresponding
623 * INTEN register bit position.
624 *
625 * The event identifier is the offset between the event register address and
626 * the peripheral base address, and is equal (thus, can be directly cast) to
627 * the corresponding value of the enumerated type from HAL (nrf_*_event_t).
628 *
629 * @param[in] event Event identifier.
630 *
631 * @return INTEN register bit position.
632 *
633 * @sa nrfx_bitpos_to_event
634 */
635 NRF_STATIC_INLINE uint32_t nrfx_event_to_bitpos(uint32_t event);
636
637 #ifndef NRF_DECLARE_ONLY
638
nrfx_is_in_ram(void const * p_object)639 NRF_STATIC_INLINE bool nrfx_is_in_ram(void const * p_object)
640 {
641 return ((((uint32_t)p_object) & 0xE0000000u) == 0x20000000u);
642 }
643
nrfx_is_word_aligned(void const * p_object)644 NRF_STATIC_INLINE bool nrfx_is_word_aligned(void const * p_object)
645 {
646 return ((((uint32_t)p_object) & 0x3u) == 0u);
647 }
648
nrfx_get_irq_number(void const * p_reg)649 NRF_STATIC_INLINE IRQn_Type nrfx_get_irq_number(void const * p_reg)
650 {
651 return (IRQn_Type)NRFX_IRQ_NUMBER_GET(p_reg);
652 }
653
nrfx_bitpos_to_event(uint32_t bit)654 NRF_STATIC_INLINE uint32_t nrfx_bitpos_to_event(uint32_t bit)
655 {
656 static const uint32_t event_reg_offset = 0x100u;
657 return event_reg_offset + (bit * sizeof(uint32_t));
658 }
659
nrfx_event_to_bitpos(uint32_t event)660 NRF_STATIC_INLINE uint32_t nrfx_event_to_bitpos(uint32_t event)
661 {
662 static const uint32_t event_reg_offset = 0x100u;
663 return (event - event_reg_offset) / sizeof(uint32_t);
664 }
665
666 #endif // NRF_DECLARE_ONLY
667
668 /** @} */
669
670 #ifdef __cplusplus
671 }
672 #endif
673
674 #endif // NRFX_COMMON_H__
675
