462 lines
15 KiB
C
462 lines
15 KiB
C
/**
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******************************************************************************
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* @file stm32f7xx_ll_crc.h
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* @author MCD Application Team
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* @brief Header file of CRC LL module.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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*/
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/* Define to prevent recursive inclusion -------------------------------------*/
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#ifndef STM32F7xx_LL_CRC_H
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#define STM32F7xx_LL_CRC_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f7xx.h"
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/** @addtogroup STM32F7xx_LL_Driver
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* @{
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*/
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#if defined(CRC)
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/** @defgroup CRC_LL CRC
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* @{
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*/
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/* Private types -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private constants ---------------------------------------------------------*/
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/* Private macros ------------------------------------------------------------*/
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/* Exported types ------------------------------------------------------------*/
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/* Exported constants --------------------------------------------------------*/
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/** @defgroup CRC_LL_Exported_Constants CRC Exported Constants
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* @{
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*/
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/** @defgroup CRC_LL_EC_POLYLENGTH Polynomial length
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* @{
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*/
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#define LL_CRC_POLYLENGTH_32B 0x00000000U /*!< 32 bits Polynomial size */
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#define LL_CRC_POLYLENGTH_16B CRC_CR_POLYSIZE_0 /*!< 16 bits Polynomial size */
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#define LL_CRC_POLYLENGTH_8B CRC_CR_POLYSIZE_1 /*!< 8 bits Polynomial size */
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#define LL_CRC_POLYLENGTH_7B (CRC_CR_POLYSIZE_1 | CRC_CR_POLYSIZE_0) /*!< 7 bits Polynomial size */
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/**
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* @}
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*/
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/** @defgroup CRC_LL_EC_INDATA_REVERSE Input Data Reverse
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* @{
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*/
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#define LL_CRC_INDATA_REVERSE_NONE 0x00000000U /*!< Input Data bit order not affected */
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#define LL_CRC_INDATA_REVERSE_BYTE CRC_CR_REV_IN_0 /*!< Input Data bit reversal done by byte */
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#define LL_CRC_INDATA_REVERSE_HALFWORD CRC_CR_REV_IN_1 /*!< Input Data bit reversal done by half-word */
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#define LL_CRC_INDATA_REVERSE_WORD (CRC_CR_REV_IN_1 | CRC_CR_REV_IN_0) /*!< Input Data bit reversal done by word */
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/**
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* @}
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*/
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/** @defgroup CRC_LL_EC_OUTDATA_REVERSE Output Data Reverse
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* @{
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*/
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#define LL_CRC_OUTDATA_REVERSE_NONE 0x00000000U /*!< Output Data bit order not affected */
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#define LL_CRC_OUTDATA_REVERSE_BIT CRC_CR_REV_OUT /*!< Output Data bit reversal done by bit */
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/**
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* @}
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*/
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/** @defgroup CRC_LL_EC_Default_Polynomial_Value Default CRC generating polynomial value
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* @brief Normal representation of this polynomial value is
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* 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 .
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* @{
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*/
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#define LL_CRC_DEFAULT_CRC32_POLY 0x04C11DB7U /*!< Default CRC generating polynomial value */
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/**
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* @}
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*/
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/** @defgroup CRC_LL_EC_Default_InitValue Default CRC computation initialization value
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* @{
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*/
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#define LL_CRC_DEFAULT_CRC_INITVALUE 0xFFFFFFFFU /*!< Default CRC computation initialization value */
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/**
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* @}
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*/
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/**
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* @}
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*/
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/* Exported macro ------------------------------------------------------------*/
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/** @defgroup CRC_LL_Exported_Macros CRC Exported Macros
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* @{
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*/
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/** @defgroup CRC_LL_EM_WRITE_READ Common Write and read registers Macros
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* @{
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*/
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/**
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* @brief Write a value in CRC register
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* @param __INSTANCE__ CRC Instance
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* @param __REG__ Register to be written
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* @param __VALUE__ Value to be written in the register
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* @retval None
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*/
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#define LL_CRC_WriteReg(__INSTANCE__, __REG__, __VALUE__) WRITE_REG(__INSTANCE__->__REG__, __VALUE__)
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/**
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* @brief Read a value in CRC register
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* @param __INSTANCE__ CRC Instance
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* @param __REG__ Register to be read
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* @retval Register value
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*/
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#define LL_CRC_ReadReg(__INSTANCE__, __REG__) READ_REG(__INSTANCE__->__REG__)
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/**
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* @}
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*/
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/**
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* @}
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*/
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/* Exported functions --------------------------------------------------------*/
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/** @defgroup CRC_LL_Exported_Functions CRC Exported Functions
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* @{
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*/
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/** @defgroup CRC_LL_EF_Configuration CRC Configuration functions
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* @{
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*/
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/**
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* @brief Reset the CRC calculation unit.
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* @note If Programmable Initial CRC value feature
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* is available, also set the Data Register to the value stored in the
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* CRC_INIT register, otherwise, reset Data Register to its default value.
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* @rmtoll CR RESET LL_CRC_ResetCRCCalculationUnit
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* @param CRCx CRC Instance
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* @retval None
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*/
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__STATIC_INLINE void LL_CRC_ResetCRCCalculationUnit(CRC_TypeDef *CRCx)
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{
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SET_BIT(CRCx->CR, CRC_CR_RESET);
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}
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/**
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* @brief Configure size of the polynomial.
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* @rmtoll CR POLYSIZE LL_CRC_SetPolynomialSize
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* @param CRCx CRC Instance
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* @param PolySize This parameter can be one of the following values:
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* @arg @ref LL_CRC_POLYLENGTH_32B
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* @arg @ref LL_CRC_POLYLENGTH_16B
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* @arg @ref LL_CRC_POLYLENGTH_8B
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* @arg @ref LL_CRC_POLYLENGTH_7B
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* @retval None
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*/
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__STATIC_INLINE void LL_CRC_SetPolynomialSize(CRC_TypeDef *CRCx, uint32_t PolySize)
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{
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MODIFY_REG(CRCx->CR, CRC_CR_POLYSIZE, PolySize);
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}
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/**
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* @brief Return size of the polynomial.
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* @rmtoll CR POLYSIZE LL_CRC_GetPolynomialSize
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* @param CRCx CRC Instance
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* @retval Returned value can be one of the following values:
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* @arg @ref LL_CRC_POLYLENGTH_32B
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* @arg @ref LL_CRC_POLYLENGTH_16B
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* @arg @ref LL_CRC_POLYLENGTH_8B
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* @arg @ref LL_CRC_POLYLENGTH_7B
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*/
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__STATIC_INLINE uint32_t LL_CRC_GetPolynomialSize(CRC_TypeDef *CRCx)
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{
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return (uint32_t)(READ_BIT(CRCx->CR, CRC_CR_POLYSIZE));
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}
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/**
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* @brief Configure the reversal of the bit order of the input data
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* @rmtoll CR REV_IN LL_CRC_SetInputDataReverseMode
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* @param CRCx CRC Instance
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* @param ReverseMode This parameter can be one of the following values:
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* @arg @ref LL_CRC_INDATA_REVERSE_NONE
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* @arg @ref LL_CRC_INDATA_REVERSE_BYTE
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* @arg @ref LL_CRC_INDATA_REVERSE_HALFWORD
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* @arg @ref LL_CRC_INDATA_REVERSE_WORD
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* @retval None
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*/
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__STATIC_INLINE void LL_CRC_SetInputDataReverseMode(CRC_TypeDef *CRCx, uint32_t ReverseMode)
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{
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MODIFY_REG(CRCx->CR, CRC_CR_REV_IN, ReverseMode);
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}
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/**
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* @brief Return type of reversal for input data bit order
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* @rmtoll CR REV_IN LL_CRC_GetInputDataReverseMode
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* @param CRCx CRC Instance
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* @retval Returned value can be one of the following values:
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* @arg @ref LL_CRC_INDATA_REVERSE_NONE
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* @arg @ref LL_CRC_INDATA_REVERSE_BYTE
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* @arg @ref LL_CRC_INDATA_REVERSE_HALFWORD
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* @arg @ref LL_CRC_INDATA_REVERSE_WORD
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*/
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__STATIC_INLINE uint32_t LL_CRC_GetInputDataReverseMode(CRC_TypeDef *CRCx)
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{
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return (uint32_t)(READ_BIT(CRCx->CR, CRC_CR_REV_IN));
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}
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/**
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* @brief Configure the reversal of the bit order of the Output data
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* @rmtoll CR REV_OUT LL_CRC_SetOutputDataReverseMode
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* @param CRCx CRC Instance
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* @param ReverseMode This parameter can be one of the following values:
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* @arg @ref LL_CRC_OUTDATA_REVERSE_NONE
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* @arg @ref LL_CRC_OUTDATA_REVERSE_BIT
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* @retval None
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*/
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__STATIC_INLINE void LL_CRC_SetOutputDataReverseMode(CRC_TypeDef *CRCx, uint32_t ReverseMode)
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{
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MODIFY_REG(CRCx->CR, CRC_CR_REV_OUT, ReverseMode);
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}
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/**
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* @brief Return type of reversal of the bit order of the Output data
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* @rmtoll CR REV_OUT LL_CRC_GetOutputDataReverseMode
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* @param CRCx CRC Instance
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* @retval Returned value can be one of the following values:
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* @arg @ref LL_CRC_OUTDATA_REVERSE_NONE
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* @arg @ref LL_CRC_OUTDATA_REVERSE_BIT
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*/
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__STATIC_INLINE uint32_t LL_CRC_GetOutputDataReverseMode(CRC_TypeDef *CRCx)
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{
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return (uint32_t)(READ_BIT(CRCx->CR, CRC_CR_REV_OUT));
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}
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/**
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* @brief Initialize the Programmable initial CRC value.
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* @note If the CRC size is less than 32 bits, the least significant bits
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* are used to write the correct value
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* @note LL_CRC_DEFAULT_CRC_INITVALUE could be used as value for InitCrc parameter.
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* @rmtoll INIT INIT LL_CRC_SetInitialData
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* @param CRCx CRC Instance
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* @param InitCrc Value to be programmed in Programmable initial CRC value register
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* @retval None
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*/
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__STATIC_INLINE void LL_CRC_SetInitialData(CRC_TypeDef *CRCx, uint32_t InitCrc)
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{
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WRITE_REG(CRCx->INIT, InitCrc);
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}
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/**
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* @brief Return current Initial CRC value.
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* @note If the CRC size is less than 32 bits, the least significant bits
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* are used to read the correct value
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* @rmtoll INIT INIT LL_CRC_GetInitialData
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* @param CRCx CRC Instance
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* @retval Value programmed in Programmable initial CRC value register
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*/
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__STATIC_INLINE uint32_t LL_CRC_GetInitialData(CRC_TypeDef *CRCx)
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{
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return (uint32_t)(READ_REG(CRCx->INIT));
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}
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/**
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* @brief Initialize the Programmable polynomial value
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* (coefficients of the polynomial to be used for CRC calculation).
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* @note LL_CRC_DEFAULT_CRC32_POLY could be used as value for PolynomCoef parameter.
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* @note Please check Reference Manual and existing Errata Sheets,
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* regarding possible limitations for Polynomial values usage.
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* For example, for a polynomial of degree 7, X^7 + X^6 + X^5 + X^2 + 1 is written 0x65
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* @rmtoll POL POL LL_CRC_SetPolynomialCoef
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* @param CRCx CRC Instance
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* @param PolynomCoef Value to be programmed in Programmable Polynomial value register
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* @retval None
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*/
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__STATIC_INLINE void LL_CRC_SetPolynomialCoef(CRC_TypeDef *CRCx, uint32_t PolynomCoef)
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{
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WRITE_REG(CRCx->POL, PolynomCoef);
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}
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/**
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* @brief Return current Programmable polynomial value
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* @note Please check Reference Manual and existing Errata Sheets,
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* regarding possible limitations for Polynomial values usage.
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* For example, for a polynomial of degree 7, X^7 + X^6 + X^5 + X^2 + 1 is written 0x65
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* @rmtoll POL POL LL_CRC_GetPolynomialCoef
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* @param CRCx CRC Instance
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* @retval Value programmed in Programmable Polynomial value register
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*/
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__STATIC_INLINE uint32_t LL_CRC_GetPolynomialCoef(CRC_TypeDef *CRCx)
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{
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return (uint32_t)(READ_REG(CRCx->POL));
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}
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/**
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* @}
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*/
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/** @defgroup CRC_LL_EF_Data_Management Data_Management
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* @{
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*/
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/**
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* @brief Write given 32-bit data to the CRC calculator
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* @rmtoll DR DR LL_CRC_FeedData32
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* @param CRCx CRC Instance
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* @param InData value to be provided to CRC calculator between between Min_Data=0 and Max_Data=0xFFFFFFFF
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* @retval None
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*/
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__STATIC_INLINE void LL_CRC_FeedData32(CRC_TypeDef *CRCx, uint32_t InData)
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{
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WRITE_REG(CRCx->DR, InData);
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}
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/**
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* @brief Write given 16-bit data to the CRC calculator
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* @rmtoll DR DR LL_CRC_FeedData16
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* @param CRCx CRC Instance
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* @param InData 16 bit value to be provided to CRC calculator between between Min_Data=0 and Max_Data=0xFFFF
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* @retval None
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*/
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__STATIC_INLINE void LL_CRC_FeedData16(CRC_TypeDef *CRCx, uint16_t InData)
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{
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__IO uint16_t *pReg;
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pReg = (__IO uint16_t *)(__IO void *)(&CRCx->DR); /* Derogation MisraC2012 R.11.5 */
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*pReg = InData;
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}
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/**
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* @brief Write given 8-bit data to the CRC calculator
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* @rmtoll DR DR LL_CRC_FeedData8
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* @param CRCx CRC Instance
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* @param InData 8 bit value to be provided to CRC calculator between between Min_Data=0 and Max_Data=0xFF
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* @retval None
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*/
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__STATIC_INLINE void LL_CRC_FeedData8(CRC_TypeDef *CRCx, uint8_t InData)
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{
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*(uint8_t __IO *)(&CRCx->DR) = (uint8_t) InData;
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}
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/**
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* @brief Return current CRC calculation result. 32 bits value is returned.
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* @rmtoll DR DR LL_CRC_ReadData32
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* @param CRCx CRC Instance
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* @retval Current CRC calculation result as stored in CRC_DR register (32 bits).
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*/
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__STATIC_INLINE uint32_t LL_CRC_ReadData32(CRC_TypeDef *CRCx)
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{
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return (uint32_t)(READ_REG(CRCx->DR));
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}
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/**
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* @brief Return current CRC calculation result. 16 bits value is returned.
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* @note This function is expected to be used in a 16 bits CRC polynomial size context.
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* @rmtoll DR DR LL_CRC_ReadData16
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* @param CRCx CRC Instance
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* @retval Current CRC calculation result as stored in CRC_DR register (16 bits).
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*/
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__STATIC_INLINE uint16_t LL_CRC_ReadData16(CRC_TypeDef *CRCx)
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{
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return (uint16_t)READ_REG(CRCx->DR);
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}
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/**
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* @brief Return current CRC calculation result. 8 bits value is returned.
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* @note This function is expected to be used in a 8 bits CRC polynomial size context.
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* @rmtoll DR DR LL_CRC_ReadData8
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* @param CRCx CRC Instance
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* @retval Current CRC calculation result as stored in CRC_DR register (8 bits).
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*/
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__STATIC_INLINE uint8_t LL_CRC_ReadData8(CRC_TypeDef *CRCx)
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{
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return (uint8_t)READ_REG(CRCx->DR);
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}
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/**
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* @brief Return current CRC calculation result. 7 bits value is returned.
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* @note This function is expected to be used in a 7 bits CRC polynomial size context.
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* @rmtoll DR DR LL_CRC_ReadData7
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* @param CRCx CRC Instance
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* @retval Current CRC calculation result as stored in CRC_DR register (7 bits).
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*/
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__STATIC_INLINE uint8_t LL_CRC_ReadData7(CRC_TypeDef *CRCx)
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{
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return (uint8_t)(READ_REG(CRCx->DR) & 0x7FU);
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}
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/**
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* @brief Return data stored in the Independent Data(IDR) register.
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* @note This register can be used as a temporary storage location for one byte.
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* @rmtoll IDR IDR LL_CRC_Read_IDR
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* @param CRCx CRC Instance
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* @retval Value stored in CRC_IDR register (General-purpose 8-bit data register).
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*/
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__STATIC_INLINE uint32_t LL_CRC_Read_IDR(CRC_TypeDef *CRCx)
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{
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return (uint32_t)(READ_REG(CRCx->IDR));
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}
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/**
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* @brief Store data in the Independent Data(IDR) register.
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* @note This register can be used as a temporary storage location for one byte.
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* @rmtoll IDR IDR LL_CRC_Write_IDR
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* @param CRCx CRC Instance
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* @param InData value to be stored in CRC_IDR register (8-bit) between Min_Data=0 and Max_Data=0xFF
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* @retval None
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*/
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__STATIC_INLINE void LL_CRC_Write_IDR(CRC_TypeDef *CRCx, uint32_t InData)
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{
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*((uint8_t __IO *)(&CRCx->IDR)) = (uint8_t) InData;
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}
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/**
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* @}
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*/
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#if defined(USE_FULL_LL_DRIVER)
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/** @defgroup CRC_LL_EF_Init Initialization and de-initialization functions
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* @{
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*/
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ErrorStatus LL_CRC_DeInit(CRC_TypeDef *CRCx);
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/**
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* @}
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*/
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#endif /* USE_FULL_LL_DRIVER */
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/**
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* @}
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*/
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/**
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* @}
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*/
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#endif /* defined(CRC) */
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/**
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* @}
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*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* STM32F7xx_LL_CRC_H */
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