mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

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targets/TARGET_STM/TARGET_STM32L0/device/stm32l0xx_hal_crc_ex.c@189:f392fc9709a3, 2019-02-20 (annotated)

Committer:
AnnaBridge
Date:
Wed Feb 20 22:31:08 2019 +0000
Revision:
189:f392fc9709a3
Parent:
186:707f6e361f3e 
mbed library release version 165

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /**
<> 144:ef7eb2e8f9f7 2 ******************************************************************************
<> 144:ef7eb2e8f9f7 3 * @file stm32l0xx_hal_crc_ex.c
<> 144:ef7eb2e8f9f7 4 * @author MCD Application Team
<> 144:ef7eb2e8f9f7 5 * @brief Extended CRC HAL module driver.
<> 144:ef7eb2e8f9f7 6 *
<> 144:ef7eb2e8f9f7 7 * This file provides firmware functions to manage the following
<> 144:ef7eb2e8f9f7 8 * functionalities of the CRC peripheral:
<> 144:ef7eb2e8f9f7 9 * + Initialization/de-initialization functions
<> 144:ef7eb2e8f9f7 10 *
<> 144:ef7eb2e8f9f7 11 @verbatim
<> 144:ef7eb2e8f9f7 12 ==============================================================================
<> 144:ef7eb2e8f9f7 13 ##### CRC specific features #####
<> 144:ef7eb2e8f9f7 14 ==============================================================================
<> 144:ef7eb2e8f9f7 15 [..]
<> 144:ef7eb2e8f9f7 16 (#) Polynomial configuration.
<> 144:ef7eb2e8f9f7 17 (#) Input data reverse mode.
<> 144:ef7eb2e8f9f7 18 (#) Output data reverse mode.
<> 144:ef7eb2e8f9f7 19
<> 144:ef7eb2e8f9f7 20 @endverbatim
<> 144:ef7eb2e8f9f7 21 ******************************************************************************
<> 144:ef7eb2e8f9f7 22 * @attention
<> 144:ef7eb2e8f9f7 23 *
<> 144:ef7eb2e8f9f7 24 * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
<> 144:ef7eb2e8f9f7 25 *
<> 144:ef7eb2e8f9f7 26 * Redistribution and use in source and binary forms, with or without modification,
<> 144:ef7eb2e8f9f7 27 * are permitted provided that the following conditions are met:
<> 144:ef7eb2e8f9f7 28 * 1. Redistributions of source code must retain the above copyright notice,
<> 144:ef7eb2e8f9f7 29 * this list of conditions and the following disclaimer.
<> 144:ef7eb2e8f9f7 30 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 144:ef7eb2e8f9f7 31 * this list of conditions and the following disclaimer in the documentation
<> 144:ef7eb2e8f9f7 32 * and/or other materials provided with the distribution.
<> 144:ef7eb2e8f9f7 33 * 3. Neither the name of STMicroelectronics nor the names of its contributors
<> 144:ef7eb2e8f9f7 34 * may be used to endorse or promote products derived from this software
<> 144:ef7eb2e8f9f7 35 * without specific prior written permission.
<> 144:ef7eb2e8f9f7 36 *
<> 144:ef7eb2e8f9f7 37 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 144:ef7eb2e8f9f7 38 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 144:ef7eb2e8f9f7 39 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 144:ef7eb2e8f9f7 40 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 144:ef7eb2e8f9f7 41 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 144:ef7eb2e8f9f7 42 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 144:ef7eb2e8f9f7 43 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 144:ef7eb2e8f9f7 44 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 144:ef7eb2e8f9f7 45 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 144:ef7eb2e8f9f7 46 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 144:ef7eb2e8f9f7 47 *
<> 144:ef7eb2e8f9f7 48 ******************************************************************************
<> 144:ef7eb2e8f9f7 49 */
<> 144:ef7eb2e8f9f7 50
<> 144:ef7eb2e8f9f7 51 /* Includes ------------------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 52 #include "stm32l0xx_hal.h"
<> 144:ef7eb2e8f9f7 53
<> 144:ef7eb2e8f9f7 54 /** @addtogroup STM32L0xx_HAL_Driver
<> 144:ef7eb2e8f9f7 55 * @{
<> 144:ef7eb2e8f9f7 56 */
<> 144:ef7eb2e8f9f7 57
<> 144:ef7eb2e8f9f7 58 /** @addtogroup CRCEx
<> 144:ef7eb2e8f9f7 59 * @brief CRC Extended HAL module driver
<> 144:ef7eb2e8f9f7 60 * @{
<> 144:ef7eb2e8f9f7 61 */
<> 144:ef7eb2e8f9f7 62
<> 144:ef7eb2e8f9f7 63 #ifdef HAL_CRC_MODULE_ENABLED
<> 144:ef7eb2e8f9f7 64
<> 144:ef7eb2e8f9f7 65 /* Private typedef -----------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 66 /* Private define ------------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 67 /* Private macro -------------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 68 /* Private variables ---------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 69 /* Private function prototypes -----------------------------------------------*/
<> 144:ef7eb2e8f9f7 70 /* Private functions ---------------------------------------------------------*/
<> 144:ef7eb2e8f9f7 71
<> 144:ef7eb2e8f9f7 72 /** @addtogroup CRCEx_Exported_Functions
<> 144:ef7eb2e8f9f7 73 * @{
<> 144:ef7eb2e8f9f7 74 */
<> 144:ef7eb2e8f9f7 75
<> 144:ef7eb2e8f9f7 76 /** @addtogroup CRCEx_Exported_Functions_Group1
<> 144:ef7eb2e8f9f7 77 * @brief Extended CRC features functions
<> 144:ef7eb2e8f9f7 78 *
<> 144:ef7eb2e8f9f7 79 @verbatim
<> 144:ef7eb2e8f9f7 80 ===============================================================================
<> 144:ef7eb2e8f9f7 81 ##### CRC Extended features functions #####
<> 144:ef7eb2e8f9f7 82 ===============================================================================
<> 144:ef7eb2e8f9f7 83 [..]
<> 144:ef7eb2e8f9f7 84 This subsection provides function allowing to:
<> 144:ef7eb2e8f9f7 85 (+) Set CRC polynomial if different from default one.
<> 144:ef7eb2e8f9f7 86
<> 144:ef7eb2e8f9f7 87 @endverbatim
<> 144:ef7eb2e8f9f7 88 * @{
<> 144:ef7eb2e8f9f7 89 */
<> 144:ef7eb2e8f9f7 90
<> 144:ef7eb2e8f9f7 91
<> 144:ef7eb2e8f9f7 92 /**
<> 144:ef7eb2e8f9f7 93 * @brief Initializes the CRC polynomial if different from default one.
<> 144:ef7eb2e8f9f7 94 * @param hcrc: CRC handle
<> 144:ef7eb2e8f9f7 95 * @param Pol: CRC generating polynomial (7, 8, 16 or 32-bit long)
<> 144:ef7eb2e8f9f7 96 * This parameter is written in normal representation, e.g.
<> 144:ef7eb2e8f9f7 97 * for a polynomial of degree 7, X^7 + X^6 + X^5 + X^2 + 1 is written 0x65
<> 144:ef7eb2e8f9f7 98 * for a polynomial of degree 16, X^16 + X^12 + X^5 + 1 is written 0x1021
<> 144:ef7eb2e8f9f7 99 * @param PolyLength: CRC polynomial length
<> 144:ef7eb2e8f9f7 100 * This parameter can be one of the following values:
<> 144:ef7eb2e8f9f7 101 * @arg CRC_POLYLENGTH_7B: 7-bit long CRC (generating polynomial of degree 7)
<> 144:ef7eb2e8f9f7 102 * @arg CRC_POLYLENGTH_8B: 8-bit long CRC (generating polynomial of degree 8)
<> 144:ef7eb2e8f9f7 103 * @arg CRC_POLYLENGTH_16B: 16-bit long CRC (generating polynomial of degree 16)
<> 144:ef7eb2e8f9f7 104 * @arg CRC_POLYLENGTH_32B: 32-bit long CRC (generating polynomial of degree 32)
<> 144:ef7eb2e8f9f7 105 * @retval HAL status
<> 144:ef7eb2e8f9f7 106 */
<> 144:ef7eb2e8f9f7 107 HAL_StatusTypeDef HAL_CRCEx_Polynomial_Set(CRC_HandleTypeDef *hcrc, uint32_t Pol, uint32_t PolyLength)
<> 144:ef7eb2e8f9f7 108 {
<> 151:5eaa88a5bcc7 109 uint32_t msb = 31U; /* polynomial degree is 32 at most, so msb is initialized to max value */
<> 144:ef7eb2e8f9f7 110
<> 144:ef7eb2e8f9f7 111 /* Check the parameters */
<> 144:ef7eb2e8f9f7 112 assert_param(IS_CRC_POL_LENGTH(PolyLength));
<> 144:ef7eb2e8f9f7 113
<> 144:ef7eb2e8f9f7 114 /* check polynomial definition vs polynomial size:
<> 144:ef7eb2e8f9f7 115 * polynomial length must be aligned with polynomial
<> 144:ef7eb2e8f9f7 116 * definition. HAL_ERROR is reported if Pol degree is
<> 144:ef7eb2e8f9f7 117 * larger than that indicated by PolyLength.
<> 144:ef7eb2e8f9f7 118 * Look for MSB position: msb will contain the degree of
<> 144:ef7eb2e8f9f7 119 * the second to the largest polynomial member. E.g., for
<> 144:ef7eb2e8f9f7 120 * X^7 + X^6 + X^5 + X^2 + 1, msb = 6. */
Anna Bridge 186:707f6e361f3e 121 while (((Pol & (1U << msb)) == 0) && (msb-- > 0)){}
<> 144:ef7eb2e8f9f7 122
<> 144:ef7eb2e8f9f7 123 switch (PolyLength)
<> 144:ef7eb2e8f9f7 124 {
<> 144:ef7eb2e8f9f7 125 case CRC_POLYLENGTH_7B:
Anna Bridge 186:707f6e361f3e 126 if (msb >= HAL_CRC_LENGTH_7B)
Anna Bridge 186:707f6e361f3e 127 {
Anna Bridge 186:707f6e361f3e 128 return HAL_ERROR;
Anna Bridge 186:707f6e361f3e 129 }
<> 144:ef7eb2e8f9f7 130 break;
<> 144:ef7eb2e8f9f7 131 case CRC_POLYLENGTH_8B:
Anna Bridge 186:707f6e361f3e 132 if (msb >= HAL_CRC_LENGTH_8B)
Anna Bridge 186:707f6e361f3e 133 {
Anna Bridge 186:707f6e361f3e 134 return HAL_ERROR;
Anna Bridge 186:707f6e361f3e 135 }
<> 144:ef7eb2e8f9f7 136 break;
<> 144:ef7eb2e8f9f7 137 case CRC_POLYLENGTH_16B:
Anna Bridge 186:707f6e361f3e 138 if (msb >= HAL_CRC_LENGTH_16B)
Anna Bridge 186:707f6e361f3e 139 {
Anna Bridge 186:707f6e361f3e 140 return HAL_ERROR;
Anna Bridge 186:707f6e361f3e 141 }
<> 144:ef7eb2e8f9f7 142 break;
<> 144:ef7eb2e8f9f7 143 case CRC_POLYLENGTH_32B:
<> 144:ef7eb2e8f9f7 144 /* no polynomial definition vs. polynomial length issue possible */
Anna Bridge 186:707f6e361f3e 145 break;
Anna Bridge 186:707f6e361f3e 146 default:
Anna Bridge 186:707f6e361f3e 147 break;
<> 144:ef7eb2e8f9f7 148 }
<> 144:ef7eb2e8f9f7 149
<> 144:ef7eb2e8f9f7 150 /* set generating polynomial */
<> 144:ef7eb2e8f9f7 151 WRITE_REG(hcrc->Instance->POL, Pol);
<> 144:ef7eb2e8f9f7 152
<> 144:ef7eb2e8f9f7 153 /* set generating polynomial size */
<> 144:ef7eb2e8f9f7 154 MODIFY_REG(hcrc->Instance->CR, CRC_CR_POLYSIZE, PolyLength);
<> 144:ef7eb2e8f9f7 155
<> 144:ef7eb2e8f9f7 156 /* Return function status */
<> 144:ef7eb2e8f9f7 157 return HAL_OK;
<> 144:ef7eb2e8f9f7 158 }
<> 144:ef7eb2e8f9f7 159
<> 144:ef7eb2e8f9f7 160 /**
<> 144:ef7eb2e8f9f7 161 * @brief Set the Reverse Input data mode.
<> 144:ef7eb2e8f9f7 162 * @param hcrc: CRC handle
<> 144:ef7eb2e8f9f7 163 * @param InputReverseMode: Input Data inversion mode
<> 144:ef7eb2e8f9f7 164 * This parameter can be one of the following values:
<> 144:ef7eb2e8f9f7 165 * @arg CRC_INPUTDATA_INVERSION_NONE: no change in bit order (default value)
<> 144:ef7eb2e8f9f7 166 * @arg CRC_INPUTDATA_INVERSION_BYTE: Byte-wise bit reversal
<> 144:ef7eb2e8f9f7 167 * @arg CRC_INPUTDATA_INVERSION_HALFWORD: HalfWord-wise bit reversal
<> 144:ef7eb2e8f9f7 168 * @arg CRC_INPUTDATA_INVERSION_WORD: Word-wise bit reversal
<> 144:ef7eb2e8f9f7 169 * @retval HAL status
<> 144:ef7eb2e8f9f7 170 */
<> 144:ef7eb2e8f9f7 171 HAL_StatusTypeDef HAL_CRCEx_Input_Data_Reverse(CRC_HandleTypeDef *hcrc, uint32_t InputReverseMode)
<> 144:ef7eb2e8f9f7 172 {
<> 144:ef7eb2e8f9f7 173 /* Check the parameters */
<> 144:ef7eb2e8f9f7 174 assert_param(IS_CRC_INPUTDATA_INVERSION_MODE(InputReverseMode));
<> 144:ef7eb2e8f9f7 175
<> 144:ef7eb2e8f9f7 176 /* Change CRC peripheral state */
<> 144:ef7eb2e8f9f7 177 hcrc->State = HAL_CRC_STATE_BUSY;
<> 144:ef7eb2e8f9f7 178
<> 144:ef7eb2e8f9f7 179 /* set input data inversion mode */
<> 144:ef7eb2e8f9f7 180 MODIFY_REG(hcrc->Instance->CR, CRC_CR_REV_IN, InputReverseMode);
<> 144:ef7eb2e8f9f7 181 /* Change CRC peripheral state */
<> 144:ef7eb2e8f9f7 182 hcrc->State = HAL_CRC_STATE_READY;
<> 144:ef7eb2e8f9f7 183
<> 144:ef7eb2e8f9f7 184 /* Return function status */
<> 144:ef7eb2e8f9f7 185 return HAL_OK;
<> 144:ef7eb2e8f9f7 186 }
<> 144:ef7eb2e8f9f7 187
<> 144:ef7eb2e8f9f7 188 /**
<> 144:ef7eb2e8f9f7 189 * @brief Set the Reverse Output data mode.
<> 144:ef7eb2e8f9f7 190 * @param hcrc: CRC handle
<> 144:ef7eb2e8f9f7 191 * @param OutputReverseMode: Output Data inversion mode
<> 144:ef7eb2e8f9f7 192 * This parameter can be one of the following values:
<> 144:ef7eb2e8f9f7 193 * @arg CRC_OUTPUTDATA_INVERSION_DISABLE: no CRC inversion (default value)
<> 144:ef7eb2e8f9f7 194 * @arg CRC_OUTPUTDATA_INVERSION_ENABLE: bit-level inversion (e.g for a 8-bit CRC: 0xB5 becomes 0xAD)
<> 144:ef7eb2e8f9f7 195 * @retval HAL status
<> 144:ef7eb2e8f9f7 196 */
<> 144:ef7eb2e8f9f7 197 HAL_StatusTypeDef HAL_CRCEx_Output_Data_Reverse(CRC_HandleTypeDef *hcrc, uint32_t OutputReverseMode)
<> 144:ef7eb2e8f9f7 198 {
<> 144:ef7eb2e8f9f7 199 /* Check the parameters */
<> 144:ef7eb2e8f9f7 200 assert_param(IS_CRC_OUTPUTDATA_INVERSION_MODE(OutputReverseMode));
<> 144:ef7eb2e8f9f7 201
<> 144:ef7eb2e8f9f7 202 /* Change CRC peripheral state */
<> 144:ef7eb2e8f9f7 203 hcrc->State = HAL_CRC_STATE_BUSY;
<> 144:ef7eb2e8f9f7 204
<> 144:ef7eb2e8f9f7 205 /* set output data inversion mode */
<> 144:ef7eb2e8f9f7 206 MODIFY_REG(hcrc->Instance->CR, CRC_CR_REV_OUT, OutputReverseMode);
<> 144:ef7eb2e8f9f7 207
<> 144:ef7eb2e8f9f7 208 /* Change CRC peripheral state */
<> 144:ef7eb2e8f9f7 209 hcrc->State = HAL_CRC_STATE_READY;
<> 144:ef7eb2e8f9f7 210
<> 144:ef7eb2e8f9f7 211 /* Return function status */
<> 144:ef7eb2e8f9f7 212 return HAL_OK;
<> 144:ef7eb2e8f9f7 213 }
<> 144:ef7eb2e8f9f7 214
<> 144:ef7eb2e8f9f7 215
<> 144:ef7eb2e8f9f7 216
<> 144:ef7eb2e8f9f7 217
<> 144:ef7eb2e8f9f7 218 /**
<> 144:ef7eb2e8f9f7 219 * @}
<> 144:ef7eb2e8f9f7 220 */
<> 144:ef7eb2e8f9f7 221
<> 144:ef7eb2e8f9f7 222
<> 144:ef7eb2e8f9f7 223 /**
<> 144:ef7eb2e8f9f7 224 * @}
<> 144:ef7eb2e8f9f7 225 */
<> 144:ef7eb2e8f9f7 226
<> 144:ef7eb2e8f9f7 227
<> 144:ef7eb2e8f9f7 228 #endif /* HAL_CRC_MODULE_ENABLED */
<> 144:ef7eb2e8f9f7 229 /**
<> 144:ef7eb2e8f9f7 230 * @}
<> 144:ef7eb2e8f9f7 231 */
<> 144:ef7eb2e8f9f7 232
<> 144:ef7eb2e8f9f7 233 /**
<> 144:ef7eb2e8f9f7 234 * @}
<> 144:ef7eb2e8f9f7 235 */
<> 144:ef7eb2e8f9f7 236
<> 144:ef7eb2e8f9f7 237 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
<> 144:ef7eb2e8f9f7 238