Toyomasa Watarai / mbed-dev

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Fork of mbed-dev by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32F3XX/stm32f30x_crc.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Initial commit on mbed-dev



Replaces mbed-src (now inactive)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /**
bogdanm 0:9b334a45a8ff 2 ******************************************************************************
bogdanm 0:9b334a45a8ff 3 * @file stm32f30x_crc.c
bogdanm 0:9b334a45a8ff 4 * @author MCD Application Team
bogdanm 0:9b334a45a8ff 5 * @version V1.1.0
bogdanm 0:9b334a45a8ff 6 * @date 27-February-2014
bogdanm 0:9b334a45a8ff 7 * @brief This file provides firmware functions to manage the following
bogdanm 0:9b334a45a8ff 8 * functionalities of CRC computation unit peripheral:
bogdanm 0:9b334a45a8ff 9 * + Configuration of the CRC computation unit
bogdanm 0:9b334a45a8ff 10 * + CRC computation of one/many 32-bit data
bogdanm 0:9b334a45a8ff 11 * + CRC Independent register (IDR) access
bogdanm 0:9b334a45a8ff 12 *
bogdanm 0:9b334a45a8ff 13 @verbatim
bogdanm 0:9b334a45a8ff 14
bogdanm 0:9b334a45a8ff 15 ===============================================================================
bogdanm 0:9b334a45a8ff 16 ##### How to use this driver #####
bogdanm 0:9b334a45a8ff 17 ===============================================================================
bogdanm 0:9b334a45a8ff 18 [..]
bogdanm 0:9b334a45a8ff 19 (#) Enable CRC AHB clock using RCC_AHBPeriphClockCmd(RCC_AHBPeriph_CRC, ENABLE)
bogdanm 0:9b334a45a8ff 20 function.
bogdanm 0:9b334a45a8ff 21 (#) Select the polynomial size: 7-bit, 8-bit, 16-bit or 32-bit.
bogdanm 0:9b334a45a8ff 22 (#) Set the polynomial coefficients using CRC_SetPolynomial();
bogdanm 0:9b334a45a8ff 23 (#) If required, select the reverse operation on input data
bogdanm 0:9b334a45a8ff 24 using CRC_ReverseInputDataSelect();
bogdanm 0:9b334a45a8ff 25 (#) If required, enable the reverse operation on output data
bogdanm 0:9b334a45a8ff 26 using CRC_ReverseOutputDataCmd(Enable);
bogdanm 0:9b334a45a8ff 27 (#) If required, set the initialization remainder value using
bogdanm 0:9b334a45a8ff 28 CRC_SetInitRegister();
bogdanm 0:9b334a45a8ff 29 (#) use CRC_CalcCRC() function to compute the CRC of a 32-bit data
bogdanm 0:9b334a45a8ff 30 or use CRC_CalcBlockCRC() function to compute the CRC if a 32-bit
bogdanm 0:9b334a45a8ff 31 data buffer.
bogdanm 0:9b334a45a8ff 32
bogdanm 0:9b334a45a8ff 33 @endverbatim
bogdanm 0:9b334a45a8ff 34
bogdanm 0:9b334a45a8ff 35 ******************************************************************************
bogdanm 0:9b334a45a8ff 36 * @attention
bogdanm 0:9b334a45a8ff 37 *
bogdanm 0:9b334a45a8ff 38 * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
bogdanm 0:9b334a45a8ff 39 *
bogdanm 0:9b334a45a8ff 40 * Redistribution and use in source and binary forms, with or without modification,
bogdanm 0:9b334a45a8ff 41 * are permitted provided that the following conditions are met:
bogdanm 0:9b334a45a8ff 42 * 1. Redistributions of source code must retain the above copyright notice,
bogdanm 0:9b334a45a8ff 43 * this list of conditions and the following disclaimer.
bogdanm 0:9b334a45a8ff 44 * 2. Redistributions in binary form must reproduce the above copyright notice,
bogdanm 0:9b334a45a8ff 45 * this list of conditions and the following disclaimer in the documentation
bogdanm 0:9b334a45a8ff 46 * and/or other materials provided with the distribution.
bogdanm 0:9b334a45a8ff 47 * 3. Neither the name of STMicroelectronics nor the names of its contributors
bogdanm 0:9b334a45a8ff 48 * may be used to endorse or promote products derived from this software
bogdanm 0:9b334a45a8ff 49 * without specific prior written permission.
bogdanm 0:9b334a45a8ff 50 *
bogdanm 0:9b334a45a8ff 51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
bogdanm 0:9b334a45a8ff 52 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
bogdanm 0:9b334a45a8ff 53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
bogdanm 0:9b334a45a8ff 54 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
bogdanm 0:9b334a45a8ff 55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
bogdanm 0:9b334a45a8ff 56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
bogdanm 0:9b334a45a8ff 57 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
bogdanm 0:9b334a45a8ff 58 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
bogdanm 0:9b334a45a8ff 59 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
bogdanm 0:9b334a45a8ff 60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bogdanm 0:9b334a45a8ff 61 *
bogdanm 0:9b334a45a8ff 62 ******************************************************************************
bogdanm 0:9b334a45a8ff 63 */
bogdanm 0:9b334a45a8ff 64
bogdanm 0:9b334a45a8ff 65 /* Includes ------------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 66 #include "stm32f30x_crc.h"
bogdanm 0:9b334a45a8ff 67
bogdanm 0:9b334a45a8ff 68 /** @addtogroup STM32F30x_StdPeriph_Driver
bogdanm 0:9b334a45a8ff 69 * @{
bogdanm 0:9b334a45a8ff 70 */
bogdanm 0:9b334a45a8ff 71
bogdanm 0:9b334a45a8ff 72 /** @defgroup CRC
bogdanm 0:9b334a45a8ff 73 * @brief CRC driver modules
bogdanm 0:9b334a45a8ff 74 * @{
bogdanm 0:9b334a45a8ff 75 */
bogdanm 0:9b334a45a8ff 76
bogdanm 0:9b334a45a8ff 77 /* Private typedef -----------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 78 /* Private define ------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 79 /* Private macro -------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 80 /* Private variables ---------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 81 /* Private function prototypes -----------------------------------------------*/
bogdanm 0:9b334a45a8ff 82 /* Private functions ---------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 83
bogdanm 0:9b334a45a8ff 84 /** @defgroup CRC_Private_Functions
bogdanm 0:9b334a45a8ff 85 * @{
bogdanm 0:9b334a45a8ff 86 */
bogdanm 0:9b334a45a8ff 87
bogdanm 0:9b334a45a8ff 88 /** @defgroup CRC_Group1 Configuration of the CRC computation unit functions
bogdanm 0:9b334a45a8ff 89 * @brief Configuration of the CRC computation unit functions
bogdanm 0:9b334a45a8ff 90 *
bogdanm 0:9b334a45a8ff 91 @verbatim
bogdanm 0:9b334a45a8ff 92 ===============================================================================
bogdanm 0:9b334a45a8ff 93 ##### CRC configuration functions #####
bogdanm 0:9b334a45a8ff 94 ===============================================================================
bogdanm 0:9b334a45a8ff 95
bogdanm 0:9b334a45a8ff 96 @endverbatim
bogdanm 0:9b334a45a8ff 97 * @{
bogdanm 0:9b334a45a8ff 98 */
bogdanm 0:9b334a45a8ff 99
bogdanm 0:9b334a45a8ff 100 /**
bogdanm 0:9b334a45a8ff 101 * @brief Deinitializes CRC peripheral registers to their default reset values.
bogdanm 0:9b334a45a8ff 102 * @param None
bogdanm 0:9b334a45a8ff 103 * @retval None
bogdanm 0:9b334a45a8ff 104 */
bogdanm 0:9b334a45a8ff 105 void CRC_DeInit(void)
bogdanm 0:9b334a45a8ff 106 {
bogdanm 0:9b334a45a8ff 107 /* Set DR register to reset value */
bogdanm 0:9b334a45a8ff 108 CRC->DR = 0xFFFFFFFF;
bogdanm 0:9b334a45a8ff 109 /* Set the POL register to the reset value: 0x04C11DB7 */
bogdanm 0:9b334a45a8ff 110 CRC->POL = 0x04C11DB7;
bogdanm 0:9b334a45a8ff 111 /* Reset IDR register */
bogdanm 0:9b334a45a8ff 112 CRC->IDR = 0x00;
bogdanm 0:9b334a45a8ff 113 /* Set INIT register to reset value */
bogdanm 0:9b334a45a8ff 114 CRC->INIT = 0xFFFFFFFF;
bogdanm 0:9b334a45a8ff 115 /* Reset the CRC calculation unit */
bogdanm 0:9b334a45a8ff 116 CRC->CR = CRC_CR_RESET;
bogdanm 0:9b334a45a8ff 117 }
bogdanm 0:9b334a45a8ff 118
bogdanm 0:9b334a45a8ff 119 /**
bogdanm 0:9b334a45a8ff 120 * @brief Resets the CRC calculation unit and sets INIT register content in DR register.
bogdanm 0:9b334a45a8ff 121 * @param None
bogdanm 0:9b334a45a8ff 122 * @retval None
bogdanm 0:9b334a45a8ff 123 */
bogdanm 0:9b334a45a8ff 124 void CRC_ResetDR(void)
bogdanm 0:9b334a45a8ff 125 {
bogdanm 0:9b334a45a8ff 126 /* Reset CRC generator */
bogdanm 0:9b334a45a8ff 127 CRC->CR |= CRC_CR_RESET;
bogdanm 0:9b334a45a8ff 128 }
bogdanm 0:9b334a45a8ff 129
bogdanm 0:9b334a45a8ff 130 /**
bogdanm 0:9b334a45a8ff 131 * @brief Selects the polynomial size.
bogdanm 0:9b334a45a8ff 132 * @param CRC_PolSize: Specifies the polynomial size.
bogdanm 0:9b334a45a8ff 133 * This parameter can be:
bogdanm 0:9b334a45a8ff 134 * @arg CRC_PolSize_7: 7-bit polynomial for CRC calculation
bogdanm 0:9b334a45a8ff 135 * @arg CRC_PolSize_8: 8-bit polynomial for CRC calculation
bogdanm 0:9b334a45a8ff 136 * @arg CRC_PolSize_16: 16-bit polynomial for CRC calculation
bogdanm 0:9b334a45a8ff 137 * @arg CRC_PolSize_32: 32-bit polynomial for CRC calculation
bogdanm 0:9b334a45a8ff 138 * @retval None
bogdanm 0:9b334a45a8ff 139 */
bogdanm 0:9b334a45a8ff 140 void CRC_PolynomialSizeSelect(uint32_t CRC_PolSize)
bogdanm 0:9b334a45a8ff 141 {
bogdanm 0:9b334a45a8ff 142 uint32_t tmpcr = 0;
bogdanm 0:9b334a45a8ff 143
bogdanm 0:9b334a45a8ff 144 /* Check the parameter */
bogdanm 0:9b334a45a8ff 145 assert_param(IS_CRC_POL_SIZE(CRC_PolSize));
bogdanm 0:9b334a45a8ff 146
bogdanm 0:9b334a45a8ff 147 /* Get CR register value */
bogdanm 0:9b334a45a8ff 148 tmpcr = CRC->CR;
bogdanm 0:9b334a45a8ff 149
bogdanm 0:9b334a45a8ff 150 /* Reset POL_SIZE bits */
bogdanm 0:9b334a45a8ff 151 tmpcr &= (uint32_t)~((uint32_t)CRC_CR_POLSIZE);
bogdanm 0:9b334a45a8ff 152 /* Set the polynomial size */
bogdanm 0:9b334a45a8ff 153 tmpcr |= (uint32_t)CRC_PolSize;
bogdanm 0:9b334a45a8ff 154
bogdanm 0:9b334a45a8ff 155 /* Write to CR register */
bogdanm 0:9b334a45a8ff 156 CRC->CR = (uint32_t)tmpcr;
bogdanm 0:9b334a45a8ff 157 }
bogdanm 0:9b334a45a8ff 158
bogdanm 0:9b334a45a8ff 159 /**
bogdanm 0:9b334a45a8ff 160 * @brief Selects the reverse operation to be performed on input data.
bogdanm 0:9b334a45a8ff 161 * @param CRC_ReverseInputData: Specifies the reverse operation on input data.
bogdanm 0:9b334a45a8ff 162 * This parameter can be:
bogdanm 0:9b334a45a8ff 163 * @arg CRC_ReverseInputData_No: No reverse operation is performed
bogdanm 0:9b334a45a8ff 164 * @arg CRC_ReverseInputData_8bits: reverse operation performed on 8 bits
bogdanm 0:9b334a45a8ff 165 * @arg CRC_ReverseInputData_16bits: reverse operation performed on 16 bits
bogdanm 0:9b334a45a8ff 166 * @arg CRC_ReverseInputData_32bits: reverse operation performed on 32 bits
bogdanm 0:9b334a45a8ff 167 * @retval None
bogdanm 0:9b334a45a8ff 168 */
bogdanm 0:9b334a45a8ff 169 void CRC_ReverseInputDataSelect(uint32_t CRC_ReverseInputData)
bogdanm 0:9b334a45a8ff 170 {
bogdanm 0:9b334a45a8ff 171 uint32_t tmpcr = 0;
bogdanm 0:9b334a45a8ff 172
bogdanm 0:9b334a45a8ff 173 /* Check the parameter */
bogdanm 0:9b334a45a8ff 174 assert_param(IS_CRC_REVERSE_INPUT_DATA(CRC_ReverseInputData));
bogdanm 0:9b334a45a8ff 175
bogdanm 0:9b334a45a8ff 176 /* Get CR register value */
bogdanm 0:9b334a45a8ff 177 tmpcr = CRC->CR;
bogdanm 0:9b334a45a8ff 178
bogdanm 0:9b334a45a8ff 179 /* Reset REV_IN bits */
bogdanm 0:9b334a45a8ff 180 tmpcr &= (uint32_t)~((uint32_t)CRC_CR_REV_IN);
bogdanm 0:9b334a45a8ff 181 /* Set the reverse operation */
bogdanm 0:9b334a45a8ff 182 tmpcr |= (uint32_t)CRC_ReverseInputData;
bogdanm 0:9b334a45a8ff 183
bogdanm 0:9b334a45a8ff 184 /* Write to CR register */
bogdanm 0:9b334a45a8ff 185 CRC->CR = (uint32_t)tmpcr;
bogdanm 0:9b334a45a8ff 186 }
bogdanm 0:9b334a45a8ff 187
bogdanm 0:9b334a45a8ff 188 /**
bogdanm 0:9b334a45a8ff 189 * @brief Enables or disable the reverse operation on output data.
bogdanm 0:9b334a45a8ff 190 * The reverse operation on output data is performed on 32-bit.
bogdanm 0:9b334a45a8ff 191 * @param NewState: new state of the reverse operation on output data.
bogdanm 0:9b334a45a8ff 192 * This parameter can be: ENABLE or DISABLE.
bogdanm 0:9b334a45a8ff 193 * @retval None
bogdanm 0:9b334a45a8ff 194 */
bogdanm 0:9b334a45a8ff 195 void CRC_ReverseOutputDataCmd(FunctionalState NewState)
bogdanm 0:9b334a45a8ff 196 {
bogdanm 0:9b334a45a8ff 197 /* Check the parameters */
bogdanm 0:9b334a45a8ff 198 assert_param(IS_FUNCTIONAL_STATE(NewState));
bogdanm 0:9b334a45a8ff 199
bogdanm 0:9b334a45a8ff 200 if (NewState != DISABLE)
bogdanm 0:9b334a45a8ff 201 {
bogdanm 0:9b334a45a8ff 202 /* Enable reverse operation on output data */
bogdanm 0:9b334a45a8ff 203 CRC->CR |= CRC_CR_REV_OUT;
bogdanm 0:9b334a45a8ff 204 }
bogdanm 0:9b334a45a8ff 205 else
bogdanm 0:9b334a45a8ff 206 {
bogdanm 0:9b334a45a8ff 207 /* Disable reverse operation on output data */
bogdanm 0:9b334a45a8ff 208 CRC->CR &= (uint32_t)~((uint32_t)CRC_CR_REV_OUT);
bogdanm 0:9b334a45a8ff 209 }
bogdanm 0:9b334a45a8ff 210 }
bogdanm 0:9b334a45a8ff 211
bogdanm 0:9b334a45a8ff 212 /**
bogdanm 0:9b334a45a8ff 213 * @brief Initializes the INIT register.
bogdanm 0:9b334a45a8ff 214 * @note After resetting CRC calculation unit, CRC_InitValue is stored in DR register
bogdanm 0:9b334a45a8ff 215 * @param CRC_InitValue: Programmable initial CRC value
bogdanm 0:9b334a45a8ff 216 * @retval None
bogdanm 0:9b334a45a8ff 217 */
bogdanm 0:9b334a45a8ff 218 void CRC_SetInitRegister(uint32_t CRC_InitValue)
bogdanm 0:9b334a45a8ff 219 {
bogdanm 0:9b334a45a8ff 220 CRC->INIT = CRC_InitValue;
bogdanm 0:9b334a45a8ff 221 }
bogdanm 0:9b334a45a8ff 222
bogdanm 0:9b334a45a8ff 223 /**
bogdanm 0:9b334a45a8ff 224 * @brief Initializes the polynomail coefficients.
bogdanm 0:9b334a45a8ff 225 * @param CRC_Pol: Polynomial to be used for CRC calculation.
bogdanm 0:9b334a45a8ff 226 * @retval None
bogdanm 0:9b334a45a8ff 227 */
bogdanm 0:9b334a45a8ff 228 void CRC_SetPolynomial(uint32_t CRC_Pol)
bogdanm 0:9b334a45a8ff 229 {
bogdanm 0:9b334a45a8ff 230 CRC->POL = CRC_Pol;
bogdanm 0:9b334a45a8ff 231 }
bogdanm 0:9b334a45a8ff 232
bogdanm 0:9b334a45a8ff 233 /**
bogdanm 0:9b334a45a8ff 234 * @}
bogdanm 0:9b334a45a8ff 235 */
bogdanm 0:9b334a45a8ff 236
bogdanm 0:9b334a45a8ff 237 /** @defgroup CRC_Group2 CRC computation of one/many 32-bit data functions
bogdanm 0:9b334a45a8ff 238 * @brief CRC computation of one/many 32-bit data functions
bogdanm 0:9b334a45a8ff 239 *
bogdanm 0:9b334a45a8ff 240 @verbatim
bogdanm 0:9b334a45a8ff 241 ===============================================================================
bogdanm 0:9b334a45a8ff 242 ##### CRC computation functions #####
bogdanm 0:9b334a45a8ff 243 ===============================================================================
bogdanm 0:9b334a45a8ff 244
bogdanm 0:9b334a45a8ff 245 @endverbatim
bogdanm 0:9b334a45a8ff 246 * @{
bogdanm 0:9b334a45a8ff 247 */
bogdanm 0:9b334a45a8ff 248
bogdanm 0:9b334a45a8ff 249 /**
bogdanm 0:9b334a45a8ff 250 * @brief Computes the 32-bit CRC of a given data word(32-bit).
bogdanm 0:9b334a45a8ff 251 * @param CRC_Data: data word(32-bit) to compute its CRC
bogdanm 0:9b334a45a8ff 252 * @retval 32-bit CRC
bogdanm 0:9b334a45a8ff 253 */
bogdanm 0:9b334a45a8ff 254 uint32_t CRC_CalcCRC(uint32_t CRC_Data)
bogdanm 0:9b334a45a8ff 255 {
bogdanm 0:9b334a45a8ff 256 CRC->DR = CRC_Data;
bogdanm 0:9b334a45a8ff 257
bogdanm 0:9b334a45a8ff 258 return (CRC->DR);
bogdanm 0:9b334a45a8ff 259 }
bogdanm 0:9b334a45a8ff 260
bogdanm 0:9b334a45a8ff 261 /**
bogdanm 0:9b334a45a8ff 262 * @brief Computes the 16-bit CRC of a given 16-bit data.
bogdanm 0:9b334a45a8ff 263 * @param CRC_Data: data half-word(16-bit) to compute its CRC
bogdanm 0:9b334a45a8ff 264 * @retval 16-bit CRC
bogdanm 0:9b334a45a8ff 265 */
bogdanm 0:9b334a45a8ff 266 uint32_t CRC_CalcCRC16bits(uint16_t CRC_Data)
bogdanm 0:9b334a45a8ff 267 {
bogdanm 0:9b334a45a8ff 268 *(uint16_t*)(CRC_BASE) = (uint16_t) CRC_Data;
bogdanm 0:9b334a45a8ff 269
bogdanm 0:9b334a45a8ff 270 return (CRC->DR);
bogdanm 0:9b334a45a8ff 271 }
bogdanm 0:9b334a45a8ff 272
bogdanm 0:9b334a45a8ff 273 /**
bogdanm 0:9b334a45a8ff 274 * @brief Computes the 8-bit CRC of a given 8-bit data.
bogdanm 0:9b334a45a8ff 275 * @param CRC_Data: 8-bit data to compute its CRC
bogdanm 0:9b334a45a8ff 276 * @retval 8-bit CRC
bogdanm 0:9b334a45a8ff 277 */
bogdanm 0:9b334a45a8ff 278 uint32_t CRC_CalcCRC8bits(uint8_t CRC_Data)
bogdanm 0:9b334a45a8ff 279 {
bogdanm 0:9b334a45a8ff 280 *(uint8_t*)(CRC_BASE) = (uint8_t) CRC_Data;
bogdanm 0:9b334a45a8ff 281
bogdanm 0:9b334a45a8ff 282 return (CRC->DR);
bogdanm 0:9b334a45a8ff 283 }
bogdanm 0:9b334a45a8ff 284
bogdanm 0:9b334a45a8ff 285 /**
bogdanm 0:9b334a45a8ff 286 * @brief Computes the 32-bit CRC of a given buffer of data word(32-bit).
bogdanm 0:9b334a45a8ff 287 * @param pBuffer: pointer to the buffer containing the data to be computed
bogdanm 0:9b334a45a8ff 288 * @param BufferLength: length of the buffer to be computed
bogdanm 0:9b334a45a8ff 289 * @retval 32-bit CRC
bogdanm 0:9b334a45a8ff 290 */
bogdanm 0:9b334a45a8ff 291 uint32_t CRC_CalcBlockCRC(uint32_t pBuffer[], uint32_t BufferLength)
bogdanm 0:9b334a45a8ff 292 {
bogdanm 0:9b334a45a8ff 293 uint32_t index = 0;
bogdanm 0:9b334a45a8ff 294
bogdanm 0:9b334a45a8ff 295 for(index = 0; index < BufferLength; index++)
bogdanm 0:9b334a45a8ff 296 {
bogdanm 0:9b334a45a8ff 297 CRC->DR = pBuffer[index];
bogdanm 0:9b334a45a8ff 298 }
bogdanm 0:9b334a45a8ff 299 return (CRC->DR);
bogdanm 0:9b334a45a8ff 300 }
bogdanm 0:9b334a45a8ff 301
bogdanm 0:9b334a45a8ff 302 /**
bogdanm 0:9b334a45a8ff 303 * @brief Returns the current CRC value.
bogdanm 0:9b334a45a8ff 304 * @param None
bogdanm 0:9b334a45a8ff 305 * @retval 32-bit CRC
bogdanm 0:9b334a45a8ff 306 */
bogdanm 0:9b334a45a8ff 307 uint32_t CRC_GetCRC(void)
bogdanm 0:9b334a45a8ff 308 {
bogdanm 0:9b334a45a8ff 309 return (CRC->DR);
bogdanm 0:9b334a45a8ff 310 }
bogdanm 0:9b334a45a8ff 311
bogdanm 0:9b334a45a8ff 312 /**
bogdanm 0:9b334a45a8ff 313 * @}
bogdanm 0:9b334a45a8ff 314 */
bogdanm 0:9b334a45a8ff 315
bogdanm 0:9b334a45a8ff 316 /** @defgroup CRC_Group3 CRC Independent Register (IDR) access functions
bogdanm 0:9b334a45a8ff 317 * @brief CRC Independent Register (IDR) access (write/read) functions
bogdanm 0:9b334a45a8ff 318 *
bogdanm 0:9b334a45a8ff 319 @verbatim
bogdanm 0:9b334a45a8ff 320 ===============================================================================
bogdanm 0:9b334a45a8ff 321 ##### CRC Independent Register (IDR) access functions #####
bogdanm 0:9b334a45a8ff 322 ===============================================================================
bogdanm 0:9b334a45a8ff 323
bogdanm 0:9b334a45a8ff 324 @endverbatim
bogdanm 0:9b334a45a8ff 325 * @{
bogdanm 0:9b334a45a8ff 326 */
bogdanm 0:9b334a45a8ff 327
bogdanm 0:9b334a45a8ff 328 /**
bogdanm 0:9b334a45a8ff 329 * @brief Stores an 8-bit data in the Independent Data(ID) register.
bogdanm 0:9b334a45a8ff 330 * @param CRC_IDValue: 8-bit value to be stored in the ID register
bogdanm 0:9b334a45a8ff 331 * @retval None
bogdanm 0:9b334a45a8ff 332 */
bogdanm 0:9b334a45a8ff 333 void CRC_SetIDRegister(uint8_t CRC_IDValue)
bogdanm 0:9b334a45a8ff 334 {
bogdanm 0:9b334a45a8ff 335 CRC->IDR = CRC_IDValue;
bogdanm 0:9b334a45a8ff 336 }
bogdanm 0:9b334a45a8ff 337
bogdanm 0:9b334a45a8ff 338 /**
bogdanm 0:9b334a45a8ff 339 * @brief Returns the 8-bit data stored in the Independent Data(ID) register
bogdanm 0:9b334a45a8ff 340 * @param None
bogdanm 0:9b334a45a8ff 341 * @retval 8-bit value of the ID register
bogdanm 0:9b334a45a8ff 342 */
bogdanm 0:9b334a45a8ff 343 uint8_t CRC_GetIDRegister(void)
bogdanm 0:9b334a45a8ff 344 {
bogdanm 0:9b334a45a8ff 345 return (CRC->IDR);
bogdanm 0:9b334a45a8ff 346 }
bogdanm 0:9b334a45a8ff 347
bogdanm 0:9b334a45a8ff 348 /**
bogdanm 0:9b334a45a8ff 349 * @}
bogdanm 0:9b334a45a8ff 350 */
bogdanm 0:9b334a45a8ff 351
bogdanm 0:9b334a45a8ff 352 /**
bogdanm 0:9b334a45a8ff 353 * @}
bogdanm 0:9b334a45a8ff 354 */
bogdanm 0:9b334a45a8ff 355
bogdanm 0:9b334a45a8ff 356 /**
bogdanm 0:9b334a45a8ff 357 * @}
bogdanm 0:9b334a45a8ff 358 */
bogdanm 0:9b334a45a8ff 359
bogdanm 0:9b334a45a8ff 360 /**
bogdanm 0:9b334a45a8ff 361 * @}
bogdanm 0:9b334a45a8ff 362 */
bogdanm 0:9b334a45a8ff 363
bogdanm 0:9b334a45a8ff 364 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/