1 /**
2 ******************************************************************************
3 * @file stm32l0xx_ll_crc.h
4 * @author MCD Application Team
5 * @brief Header file of CRC LL module.
6 ******************************************************************************
7 * @attention
8 *
9 * Copyright (c) 2016 STMicroelectronics.
10 * All rights reserved.
11 *
12 * This software is licensed under terms that can be found in the LICENSE file
13 * in the root directory of this software component.
14 * If no LICENSE file comes with this software, it is provided AS-IS.
15 *
16 ******************************************************************************
17 */
18
19 /* Define to prevent recursive inclusion -------------------------------------*/
20 #ifndef STM32L0xx_LL_CRC_H
21 #define STM32L0xx_LL_CRC_H
22
23 #ifdef __cplusplus
24 extern "C" {
25 #endif
26
27 /* Includes ------------------------------------------------------------------*/
28 #include "stm32l0xx.h"
29
30 /** @addtogroup STM32L0xx_LL_Driver
31 * @{
32 */
33
34 #if defined(CRC)
35
36 /** @defgroup CRC_LL CRC
37 * @{
38 */
39
40 /* Private types -------------------------------------------------------------*/
41 /* Private variables ---------------------------------------------------------*/
42 /* Private constants ---------------------------------------------------------*/
43 /* Private macros ------------------------------------------------------------*/
44
45 /* Exported types ------------------------------------------------------------*/
46 /* Exported constants --------------------------------------------------------*/
47 /** @defgroup CRC_LL_Exported_Constants CRC Exported Constants
48 * @{
49 */
50
51 /** @defgroup CRC_LL_EC_POLYLENGTH Polynomial length
52 * @{
53 */
54 #define LL_CRC_POLYLENGTH_32B 0x00000000U /*!< 32 bits Polynomial size */
55 #define LL_CRC_POLYLENGTH_16B CRC_CR_POLYSIZE_0 /*!< 16 bits Polynomial size */
56 #define LL_CRC_POLYLENGTH_8B CRC_CR_POLYSIZE_1 /*!< 8 bits Polynomial size */
57 #define LL_CRC_POLYLENGTH_7B (CRC_CR_POLYSIZE_1 | CRC_CR_POLYSIZE_0) /*!< 7 bits Polynomial size */
58 /**
59 * @}
60 */
61
62 /** @defgroup CRC_LL_EC_INDATA_REVERSE Input Data Reverse
63 * @{
64 */
65 #define LL_CRC_INDATA_REVERSE_NONE 0x00000000U /*!< Input Data bit order not affected */
66 #define LL_CRC_INDATA_REVERSE_BYTE CRC_CR_REV_IN_0 /*!< Input Data bit reversal done by byte */
67 #define LL_CRC_INDATA_REVERSE_HALFWORD CRC_CR_REV_IN_1 /*!< Input Data bit reversal done by half-word */
68 #define LL_CRC_INDATA_REVERSE_WORD (CRC_CR_REV_IN_1 | CRC_CR_REV_IN_0) /*!< Input Data bit reversal done by word */
69 /**
70 * @}
71 */
72
73 /** @defgroup CRC_LL_EC_OUTDATA_REVERSE Output Data Reverse
74 * @{
75 */
76 #define LL_CRC_OUTDATA_REVERSE_NONE 0x00000000U /*!< Output Data bit order not affected */
77 #define LL_CRC_OUTDATA_REVERSE_BIT CRC_CR_REV_OUT /*!< Output Data bit reversal done by bit */
78 /**
79 * @}
80 */
81
82 /** @defgroup CRC_LL_EC_Default_Polynomial_Value Default CRC generating polynomial value
83 * @brief Normal representation of this polynomial value is
84 * X^32 + X^26 + X^23 + X^22 + X^16 + X^12 + X^11 + X^10 +X^8 + X^7 + X^5 + X^4 + X^2 + X + 1 .
85 * @{
86 */
87 #define LL_CRC_DEFAULT_CRC32_POLY 0x04C11DB7U /*!< Default CRC generating polynomial value */
88 /**
89 * @}
90 */
91
92 /** @defgroup CRC_LL_EC_Default_InitValue Default CRC computation initialization value
93 * @{
94 */
95 #define LL_CRC_DEFAULT_CRC_INITVALUE 0xFFFFFFFFU /*!< Default CRC computation initialization value */
96 /**
97 * @}
98 */
99
100 /**
101 * @}
102 */
103
104 /* Exported macro ------------------------------------------------------------*/
105 /** @defgroup CRC_LL_Exported_Macros CRC Exported Macros
106 * @{
107 */
108
109 /** @defgroup CRC_LL_EM_WRITE_READ Common Write and read registers Macros
110 * @{
111 */
112
113 /**
114 * @brief Write a value in CRC register
115 * @param __INSTANCE__ CRC Instance
116 * @param __REG__ Register to be written
117 * @param __VALUE__ Value to be written in the register
118 * @retval None
119 */
120 #define LL_CRC_WriteReg(__INSTANCE__, __REG__, __VALUE__) WRITE_REG(__INSTANCE__->__REG__, __VALUE__)
121
122 /**
123 * @brief Read a value in CRC register
124 * @param __INSTANCE__ CRC Instance
125 * @param __REG__ Register to be read
126 * @retval Register value
127 */
128 #define LL_CRC_ReadReg(__INSTANCE__, __REG__) READ_REG(__INSTANCE__->__REG__)
129 /**
130 * @}
131 */
132
133 /**
134 * @}
135 */
136
137
138 /* Exported functions --------------------------------------------------------*/
139 /** @defgroup CRC_LL_Exported_Functions CRC Exported Functions
140 * @{
141 */
142
143 /** @defgroup CRC_LL_EF_Configuration CRC Configuration functions
144 * @{
145 */
146
147 /**
148 * @brief Reset the CRC calculation unit.
149 * @note If Programmable Initial CRC value feature
150 * is available, also set the Data Register to the value stored in the
151 * CRC_INIT register, otherwise, reset Data Register to its default value.
152 * @rmtoll CR RESET LL_CRC_ResetCRCCalculationUnit
153 * @param CRCx CRC Instance
154 * @retval None
155 */
LL_CRC_ResetCRCCalculationUnit(CRC_TypeDef * CRCx)156 __STATIC_INLINE void LL_CRC_ResetCRCCalculationUnit(CRC_TypeDef *CRCx)
157 {
158 SET_BIT(CRCx->CR, CRC_CR_RESET);
159 }
160
161 /**
162 * @brief Configure size of the polynomial.
163 * @rmtoll CR POLYSIZE LL_CRC_SetPolynomialSize
164 * @param CRCx CRC Instance
165 * @param PolySize This parameter can be one of the following values:
166 * @arg @ref LL_CRC_POLYLENGTH_32B
167 * @arg @ref LL_CRC_POLYLENGTH_16B
168 * @arg @ref LL_CRC_POLYLENGTH_8B
169 * @arg @ref LL_CRC_POLYLENGTH_7B
170 * @retval None
171 */
LL_CRC_SetPolynomialSize(CRC_TypeDef * CRCx,uint32_t PolySize)172 __STATIC_INLINE void LL_CRC_SetPolynomialSize(CRC_TypeDef *CRCx, uint32_t PolySize)
173 {
174 MODIFY_REG(CRCx->CR, CRC_CR_POLYSIZE, PolySize);
175 }
176
177 /**
178 * @brief Return size of the polynomial.
179 * @rmtoll CR POLYSIZE LL_CRC_GetPolynomialSize
180 * @param CRCx CRC Instance
181 * @retval Returned value can be one of the following values:
182 * @arg @ref LL_CRC_POLYLENGTH_32B
183 * @arg @ref LL_CRC_POLYLENGTH_16B
184 * @arg @ref LL_CRC_POLYLENGTH_8B
185 * @arg @ref LL_CRC_POLYLENGTH_7B
186 */
LL_CRC_GetPolynomialSize(CRC_TypeDef * CRCx)187 __STATIC_INLINE uint32_t LL_CRC_GetPolynomialSize(CRC_TypeDef *CRCx)
188 {
189 return (uint32_t)(READ_BIT(CRCx->CR, CRC_CR_POLYSIZE));
190 }
191
192 /**
193 * @brief Configure the reversal of the bit order of the input data
194 * @rmtoll CR REV_IN LL_CRC_SetInputDataReverseMode
195 * @param CRCx CRC Instance
196 * @param ReverseMode This parameter can be one of the following values:
197 * @arg @ref LL_CRC_INDATA_REVERSE_NONE
198 * @arg @ref LL_CRC_INDATA_REVERSE_BYTE
199 * @arg @ref LL_CRC_INDATA_REVERSE_HALFWORD
200 * @arg @ref LL_CRC_INDATA_REVERSE_WORD
201 * @retval None
202 */
LL_CRC_SetInputDataReverseMode(CRC_TypeDef * CRCx,uint32_t ReverseMode)203 __STATIC_INLINE void LL_CRC_SetInputDataReverseMode(CRC_TypeDef *CRCx, uint32_t ReverseMode)
204 {
205 MODIFY_REG(CRCx->CR, CRC_CR_REV_IN, ReverseMode);
206 }
207
208 /**
209 * @brief Return type of reversal for input data bit order
210 * @rmtoll CR REV_IN LL_CRC_GetInputDataReverseMode
211 * @param CRCx CRC Instance
212 * @retval Returned value can be one of the following values:
213 * @arg @ref LL_CRC_INDATA_REVERSE_NONE
214 * @arg @ref LL_CRC_INDATA_REVERSE_BYTE
215 * @arg @ref LL_CRC_INDATA_REVERSE_HALFWORD
216 * @arg @ref LL_CRC_INDATA_REVERSE_WORD
217 */
LL_CRC_GetInputDataReverseMode(CRC_TypeDef * CRCx)218 __STATIC_INLINE uint32_t LL_CRC_GetInputDataReverseMode(CRC_TypeDef *CRCx)
219 {
220 return (uint32_t)(READ_BIT(CRCx->CR, CRC_CR_REV_IN));
221 }
222
223 /**
224 * @brief Configure the reversal of the bit order of the Output data
225 * @rmtoll CR REV_OUT LL_CRC_SetOutputDataReverseMode
226 * @param CRCx CRC Instance
227 * @param ReverseMode This parameter can be one of the following values:
228 * @arg @ref LL_CRC_OUTDATA_REVERSE_NONE
229 * @arg @ref LL_CRC_OUTDATA_REVERSE_BIT
230 * @retval None
231 */
LL_CRC_SetOutputDataReverseMode(CRC_TypeDef * CRCx,uint32_t ReverseMode)232 __STATIC_INLINE void LL_CRC_SetOutputDataReverseMode(CRC_TypeDef *CRCx, uint32_t ReverseMode)
233 {
234 MODIFY_REG(CRCx->CR, CRC_CR_REV_OUT, ReverseMode);
235 }
236
237 /**
238 * @brief Return type of reversal of the bit order of the Output data
239 * @rmtoll CR REV_OUT LL_CRC_GetOutputDataReverseMode
240 * @param CRCx CRC Instance
241 * @retval Returned value can be one of the following values:
242 * @arg @ref LL_CRC_OUTDATA_REVERSE_NONE
243 * @arg @ref LL_CRC_OUTDATA_REVERSE_BIT
244 */
LL_CRC_GetOutputDataReverseMode(CRC_TypeDef * CRCx)245 __STATIC_INLINE uint32_t LL_CRC_GetOutputDataReverseMode(CRC_TypeDef *CRCx)
246 {
247 return (uint32_t)(READ_BIT(CRCx->CR, CRC_CR_REV_OUT));
248 }
249
250 /**
251 * @brief Initialize the Programmable initial CRC value.
252 * @note If the CRC size is less than 32 bits, the least significant bits
253 * are used to write the correct value
254 * @note LL_CRC_DEFAULT_CRC_INITVALUE could be used as value for InitCrc parameter.
255 * @rmtoll INIT INIT LL_CRC_SetInitialData
256 * @param CRCx CRC Instance
257 * @param InitCrc Value to be programmed in Programmable initial CRC value register
258 * @retval None
259 */
LL_CRC_SetInitialData(CRC_TypeDef * CRCx,uint32_t InitCrc)260 __STATIC_INLINE void LL_CRC_SetInitialData(CRC_TypeDef *CRCx, uint32_t InitCrc)
261 {
262 WRITE_REG(CRCx->INIT, InitCrc);
263 }
264
265 /**
266 * @brief Return current Initial CRC value.
267 * @note If the CRC size is less than 32 bits, the least significant bits
268 * are used to read the correct value
269 * @rmtoll INIT INIT LL_CRC_GetInitialData
270 * @param CRCx CRC Instance
271 * @retval Value programmed in Programmable initial CRC value register
272 */
LL_CRC_GetInitialData(CRC_TypeDef * CRCx)273 __STATIC_INLINE uint32_t LL_CRC_GetInitialData(CRC_TypeDef *CRCx)
274 {
275 return (uint32_t)(READ_REG(CRCx->INIT));
276 }
277
278 /**
279 * @brief Initialize the Programmable polynomial value
280 * (coefficients of the polynomial to be used for CRC calculation).
281 * @note LL_CRC_DEFAULT_CRC32_POLY could be used as value for PolynomCoef parameter.
282 * @note Please check Reference Manual and existing Errata Sheets,
283 * regarding possible limitations for Polynomial values usage.
284 * For example, for a polynomial of degree 7, X^7 + X^6 + X^5 + X^2 + 1 is written 0x65
285 * @rmtoll POL POL LL_CRC_SetPolynomialCoef
286 * @param CRCx CRC Instance
287 * @param PolynomCoef Value to be programmed in Programmable Polynomial value register
288 * @retval None
289 */
LL_CRC_SetPolynomialCoef(CRC_TypeDef * CRCx,uint32_t PolynomCoef)290 __STATIC_INLINE void LL_CRC_SetPolynomialCoef(CRC_TypeDef *CRCx, uint32_t PolynomCoef)
291 {
292 WRITE_REG(CRCx->POL, PolynomCoef);
293 }
294
295 /**
296 * @brief Return current Programmable polynomial value
297 * @note Please check Reference Manual and existing Errata Sheets,
298 * regarding possible limitations for Polynomial values usage.
299 * For example, for a polynomial of degree 7, X^7 + X^6 + X^5 + X^2 + 1 is written 0x65
300 * @rmtoll POL POL LL_CRC_GetPolynomialCoef
301 * @param CRCx CRC Instance
302 * @retval Value programmed in Programmable Polynomial value register
303 */
LL_CRC_GetPolynomialCoef(CRC_TypeDef * CRCx)304 __STATIC_INLINE uint32_t LL_CRC_GetPolynomialCoef(CRC_TypeDef *CRCx)
305 {
306 return (uint32_t)(READ_REG(CRCx->POL));
307 }
308
309 /**
310 * @}
311 */
312
313 /** @defgroup CRC_LL_EF_Data_Management Data_Management
314 * @{
315 */
316
317 /**
318 * @brief Write given 32-bit data to the CRC calculator
319 * @rmtoll DR DR LL_CRC_FeedData32
320 * @param CRCx CRC Instance
321 * @param InData value to be provided to CRC calculator between between Min_Data=0 and Max_Data=0xFFFFFFFF
322 * @retval None
323 */
LL_CRC_FeedData32(CRC_TypeDef * CRCx,uint32_t InData)324 __STATIC_INLINE void LL_CRC_FeedData32(CRC_TypeDef *CRCx, uint32_t InData)
325 {
326 WRITE_REG(CRCx->DR, InData);
327 }
328
329 /**
330 * @brief Write given 16-bit data to the CRC calculator
331 * @rmtoll DR DR LL_CRC_FeedData16
332 * @param CRCx CRC Instance
333 * @param InData 16 bit value to be provided to CRC calculator between between Min_Data=0 and Max_Data=0xFFFF
334 * @retval None
335 */
LL_CRC_FeedData16(CRC_TypeDef * CRCx,uint16_t InData)336 __STATIC_INLINE void LL_CRC_FeedData16(CRC_TypeDef *CRCx, uint16_t InData)
337 {
338 __IO uint16_t *pReg;
339
340 pReg = (__IO uint16_t *)(__IO void *)(&CRCx->DR); /* Derogation MisraC2012 R.11.5 */
341 *pReg = InData;
342 }
343
344 /**
345 * @brief Write given 8-bit data to the CRC calculator
346 * @rmtoll DR DR LL_CRC_FeedData8
347 * @param CRCx CRC Instance
348 * @param InData 8 bit value to be provided to CRC calculator between between Min_Data=0 and Max_Data=0xFF
349 * @retval None
350 */
LL_CRC_FeedData8(CRC_TypeDef * CRCx,uint8_t InData)351 __STATIC_INLINE void LL_CRC_FeedData8(CRC_TypeDef *CRCx, uint8_t InData)
352 {
353 *(uint8_t __IO *)(&CRCx->DR) = (uint8_t) InData;
354 }
355
356 /**
357 * @brief Return current CRC calculation result. 32 bits value is returned.
358 * @rmtoll DR DR LL_CRC_ReadData32
359 * @param CRCx CRC Instance
360 * @retval Current CRC calculation result as stored in CRC_DR register (32 bits).
361 */
LL_CRC_ReadData32(CRC_TypeDef * CRCx)362 __STATIC_INLINE uint32_t LL_CRC_ReadData32(CRC_TypeDef *CRCx)
363 {
364 return (uint32_t)(READ_REG(CRCx->DR));
365 }
366
367 /**
368 * @brief Return current CRC calculation result. 16 bits value is returned.
369 * @note This function is expected to be used in a 16 bits CRC polynomial size context.
370 * @rmtoll DR DR LL_CRC_ReadData16
371 * @param CRCx CRC Instance
372 * @retval Current CRC calculation result as stored in CRC_DR register (16 bits).
373 */
LL_CRC_ReadData16(CRC_TypeDef * CRCx)374 __STATIC_INLINE uint16_t LL_CRC_ReadData16(CRC_TypeDef *CRCx)
375 {
376 return (uint16_t)READ_REG(CRCx->DR);
377 }
378
379 /**
380 * @brief Return current CRC calculation result. 8 bits value is returned.
381 * @note This function is expected to be used in a 8 bits CRC polynomial size context.
382 * @rmtoll DR DR LL_CRC_ReadData8
383 * @param CRCx CRC Instance
384 * @retval Current CRC calculation result as stored in CRC_DR register (8 bits).
385 */
LL_CRC_ReadData8(CRC_TypeDef * CRCx)386 __STATIC_INLINE uint8_t LL_CRC_ReadData8(CRC_TypeDef *CRCx)
387 {
388 return (uint8_t)READ_REG(CRCx->DR);
389 }
390
391 /**
392 * @brief Return current CRC calculation result. 7 bits value is returned.
393 * @note This function is expected to be used in a 7 bits CRC polynomial size context.
394 * @rmtoll DR DR LL_CRC_ReadData7
395 * @param CRCx CRC Instance
396 * @retval Current CRC calculation result as stored in CRC_DR register (7 bits).
397 */
LL_CRC_ReadData7(CRC_TypeDef * CRCx)398 __STATIC_INLINE uint8_t LL_CRC_ReadData7(CRC_TypeDef *CRCx)
399 {
400 return (uint8_t)(READ_REG(CRCx->DR) & 0x7FU);
401 }
402
403 /**
404 * @brief Return data stored in the Independent Data(IDR) register.
405 * @note This register can be used as a temporary storage location for one byte.
406 * @rmtoll IDR IDR LL_CRC_Read_IDR
407 * @param CRCx CRC Instance
408 * @retval Value stored in CRC_IDR register (General-purpose 8-bit data register).
409 */
LL_CRC_Read_IDR(CRC_TypeDef * CRCx)410 __STATIC_INLINE uint32_t LL_CRC_Read_IDR(CRC_TypeDef *CRCx)
411 {
412 return (uint32_t)(READ_REG(CRCx->IDR));
413 }
414
415 /**
416 * @brief Store data in the Independent Data(IDR) register.
417 * @note This register can be used as a temporary storage location for one byte.
418 * @rmtoll IDR IDR LL_CRC_Write_IDR
419 * @param CRCx CRC Instance
420 * @param InData value to be stored in CRC_IDR register (8-bit) between Min_Data=0 and Max_Data=0xFF
421 * @retval None
422 */
LL_CRC_Write_IDR(CRC_TypeDef * CRCx,uint32_t InData)423 __STATIC_INLINE void LL_CRC_Write_IDR(CRC_TypeDef *CRCx, uint32_t InData)
424 {
425 *((uint8_t __IO *)(&CRCx->IDR)) = (uint8_t) InData;
426 }
427 /**
428 * @}
429 */
430
431 #if defined(USE_FULL_LL_DRIVER)
432 /** @defgroup CRC_LL_EF_Init Initialization and de-initialization functions
433 * @{
434 */
435
436 ErrorStatus LL_CRC_DeInit(CRC_TypeDef *CRCx);
437
438 /**
439 * @}
440 */
441 #endif /* USE_FULL_LL_DRIVER */
442
443 /**
444 * @}
445 */
446
447 /**
448 * @}
449 */
450
451 #endif /* defined(CRC) */
452
453 /**
454 * @}
455 */
456
457 #ifdef __cplusplus
458 }
459 #endif
460
461 #endif /* STM32L0xx_LL_CRC_H */
462
