shao ziyang / mbed-src-kl05

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targets/cmsis/TARGET_STM/TARGET_DISCO_F051R8/stm32f0xx_crc.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
130:1dec54e4aec3 
test with CLOCK_SETUP = 0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 130:1dec54e4aec3 1 /**
mbed_official 130:1dec54e4aec3 2 ******************************************************************************
mbed_official 130:1dec54e4aec3 3 * @file stm32f0xx_crc.c
mbed_official 130:1dec54e4aec3 4 * @author MCD Application Team
mbed_official 130:1dec54e4aec3 5 * @version V1.3.0
mbed_official 130:1dec54e4aec3 6 * @date 16-January-2014
mbed_official 130:1dec54e4aec3 7 * @brief This file provides firmware functions to manage the following
mbed_official 130:1dec54e4aec3 8 * functionalities of CRC computation unit peripheral:
mbed_official 130:1dec54e4aec3 9 * + Configuration of the CRC computation unit
mbed_official 130:1dec54e4aec3 10 * + CRC computation of one/many 32-bit data
mbed_official 130:1dec54e4aec3 11 * + CRC Independent register (IDR) access
mbed_official 130:1dec54e4aec3 12 *
mbed_official 130:1dec54e4aec3 13 * @verbatim
mbed_official 130:1dec54e4aec3 14 ===============================================================================
mbed_official 130:1dec54e4aec3 15 ##### How to use this driver #####
mbed_official 130:1dec54e4aec3 16 ===============================================================================
mbed_official 130:1dec54e4aec3 17 [..]
mbed_official 130:1dec54e4aec3 18
mbed_official 130:1dec54e4aec3 19 (+) Enable CRC AHB clock using RCC_AHBPeriphClockCmd(RCC_AHBPeriph_CRC, ENABLE)
mbed_official 130:1dec54e4aec3 20 function
mbed_official 130:1dec54e4aec3 21 (+) If required, select the reverse operation on input data
mbed_official 130:1dec54e4aec3 22 using CRC_ReverseInputDataSelect()
mbed_official 130:1dec54e4aec3 23 (+) If required, enable the reverse operation on output data
mbed_official 130:1dec54e4aec3 24 using CRC_ReverseOutputDataCmd(Enable)
mbed_official 130:1dec54e4aec3 25 (+) use CRC_CalcCRC() function to compute the CRC of a 32-bit data
mbed_official 130:1dec54e4aec3 26 or use CRC_CalcBlockCRC() function to compute the CRC if a 32-bit
mbed_official 130:1dec54e4aec3 27 data buffer
mbed_official 130:1dec54e4aec3 28 (@) To compute the CRC of a new data use CRC_ResetDR() to reset
mbed_official 130:1dec54e4aec3 29 the CRC computation unit before starting the computation
mbed_official 130:1dec54e4aec3 30 otherwise you can get wrong CRC values.
mbed_official 130:1dec54e4aec3 31
mbed_official 130:1dec54e4aec3 32 @endverbatim
mbed_official 130:1dec54e4aec3 33 *
mbed_official 130:1dec54e4aec3 34 ******************************************************************************
mbed_official 130:1dec54e4aec3 35 * @attention
mbed_official 130:1dec54e4aec3 36 *
mbed_official 130:1dec54e4aec3 37 * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
mbed_official 130:1dec54e4aec3 38 *
mbed_official 130:1dec54e4aec3 39 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 130:1dec54e4aec3 40 * are permitted provided that the following conditions are met:
mbed_official 130:1dec54e4aec3 41 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 130:1dec54e4aec3 42 * this list of conditions and the following disclaimer.
mbed_official 130:1dec54e4aec3 43 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 130:1dec54e4aec3 44 * this list of conditions and the following disclaimer in the documentation
mbed_official 130:1dec54e4aec3 45 * and/or other materials provided with the distribution.
mbed_official 130:1dec54e4aec3 46 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 130:1dec54e4aec3 47 * may be used to endorse or promote products derived from this software
mbed_official 130:1dec54e4aec3 48 * without specific prior written permission.
mbed_official 130:1dec54e4aec3 49 *
mbed_official 130:1dec54e4aec3 50 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 130:1dec54e4aec3 51 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 130:1dec54e4aec3 52 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 130:1dec54e4aec3 53 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 130:1dec54e4aec3 54 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 130:1dec54e4aec3 55 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 130:1dec54e4aec3 56 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 130:1dec54e4aec3 57 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 130:1dec54e4aec3 58 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 130:1dec54e4aec3 59 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 130:1dec54e4aec3 60 *
mbed_official 130:1dec54e4aec3 61 ******************************************************************************
mbed_official 130:1dec54e4aec3 62 */
mbed_official 130:1dec54e4aec3 63
mbed_official 130:1dec54e4aec3 64 /* Includes ------------------------------------------------------------------*/
mbed_official 130:1dec54e4aec3 65 #include "stm32f0xx_crc.h"
mbed_official 130:1dec54e4aec3 66
mbed_official 130:1dec54e4aec3 67 /** @addtogroup STM32F0xx_StdPeriph_Driver
mbed_official 130:1dec54e4aec3 68 * @{
mbed_official 130:1dec54e4aec3 69 */
mbed_official 130:1dec54e4aec3 70
mbed_official 130:1dec54e4aec3 71 /** @defgroup CRC
mbed_official 130:1dec54e4aec3 72 * @brief CRC driver modules
mbed_official 130:1dec54e4aec3 73 * @{
mbed_official 130:1dec54e4aec3 74 */
mbed_official 130:1dec54e4aec3 75
mbed_official 130:1dec54e4aec3 76 /* Private typedef -----------------------------------------------------------*/
mbed_official 130:1dec54e4aec3 77 /* Private define ------------------------------------------------------------*/
mbed_official 130:1dec54e4aec3 78 /* Private macro -------------------------------------------------------------*/
mbed_official 130:1dec54e4aec3 79 /* Private variables ---------------------------------------------------------*/
mbed_official 130:1dec54e4aec3 80 /* Private function prototypes -----------------------------------------------*/
mbed_official 130:1dec54e4aec3 81 /* Private functions ---------------------------------------------------------*/
mbed_official 130:1dec54e4aec3 82
mbed_official 130:1dec54e4aec3 83 /** @defgroup CRC_Private_Functions
mbed_official 130:1dec54e4aec3 84 * @{
mbed_official 130:1dec54e4aec3 85 */
mbed_official 130:1dec54e4aec3 86
mbed_official 130:1dec54e4aec3 87 /** @defgroup CRC_Group1 Configuration of the CRC computation unit functions
mbed_official 130:1dec54e4aec3 88 * @brief Configuration of the CRC computation unit functions
mbed_official 130:1dec54e4aec3 89 *
mbed_official 130:1dec54e4aec3 90 @verbatim
mbed_official 130:1dec54e4aec3 91 ===============================================================================
mbed_official 130:1dec54e4aec3 92 ##### CRC configuration functions #####
mbed_official 130:1dec54e4aec3 93 ===============================================================================
mbed_official 130:1dec54e4aec3 94
mbed_official 130:1dec54e4aec3 95 @endverbatim
mbed_official 130:1dec54e4aec3 96 * @{
mbed_official 130:1dec54e4aec3 97 */
mbed_official 130:1dec54e4aec3 98
mbed_official 130:1dec54e4aec3 99 /**
mbed_official 130:1dec54e4aec3 100 * @brief Deinitializes CRC peripheral registers to their default reset values.
mbed_official 130:1dec54e4aec3 101 * @param None
mbed_official 130:1dec54e4aec3 102 * @retval None
mbed_official 130:1dec54e4aec3 103 */
mbed_official 130:1dec54e4aec3 104 void CRC_DeInit(void)
mbed_official 130:1dec54e4aec3 105 {
mbed_official 130:1dec54e4aec3 106 /* Set DR register to reset value */
mbed_official 130:1dec54e4aec3 107 CRC->DR = 0xFFFFFFFF;
mbed_official 130:1dec54e4aec3 108
mbed_official 130:1dec54e4aec3 109 /* Set the POL register to the reset value: 0x04C11DB7 */
mbed_official 130:1dec54e4aec3 110 CRC->POL = 0x04C11DB7;
mbed_official 130:1dec54e4aec3 111
mbed_official 130:1dec54e4aec3 112 /* Reset IDR register */
mbed_official 130:1dec54e4aec3 113 CRC->IDR = 0x00;
mbed_official 130:1dec54e4aec3 114
mbed_official 130:1dec54e4aec3 115 /* Set INIT register to reset value */
mbed_official 130:1dec54e4aec3 116 CRC->INIT = 0xFFFFFFFF;
mbed_official 130:1dec54e4aec3 117
mbed_official 130:1dec54e4aec3 118 /* Reset the CRC calculation unit */
mbed_official 130:1dec54e4aec3 119 CRC->CR = CRC_CR_RESET;
mbed_official 130:1dec54e4aec3 120 }
mbed_official 130:1dec54e4aec3 121
mbed_official 130:1dec54e4aec3 122 /**
mbed_official 130:1dec54e4aec3 123 * @brief Resets the CRC calculation unit and sets INIT register content in DR register.
mbed_official 130:1dec54e4aec3 124 * @param None
mbed_official 130:1dec54e4aec3 125 * @retval None
mbed_official 130:1dec54e4aec3 126 */
mbed_official 130:1dec54e4aec3 127 void CRC_ResetDR(void)
mbed_official 130:1dec54e4aec3 128 {
mbed_official 130:1dec54e4aec3 129 /* Reset CRC generator */
mbed_official 130:1dec54e4aec3 130 CRC->CR |= CRC_CR_RESET;
mbed_official 130:1dec54e4aec3 131 }
mbed_official 130:1dec54e4aec3 132
mbed_official 130:1dec54e4aec3 133 /**
mbed_official 130:1dec54e4aec3 134 * @brief Selects the polynomial size. This function is only applicable for
mbed_official 130:1dec54e4aec3 135 * STM32F072 devices.
mbed_official 130:1dec54e4aec3 136 * @param CRC_PolSize: Specifies the polynomial size.
mbed_official 130:1dec54e4aec3 137 * This parameter can be:
mbed_official 130:1dec54e4aec3 138 * @arg CRC_PolSize_7: 7-bit polynomial for CRC calculation
mbed_official 130:1dec54e4aec3 139 * @arg CRC_PolSize_8: 8-bit polynomial for CRC calculation
mbed_official 130:1dec54e4aec3 140 * @arg CRC_PolSize_16: 16-bit polynomial for CRC calculation
mbed_official 130:1dec54e4aec3 141 * @arg CRC_PolSize_32: 32-bit polynomial for CRC calculation
mbed_official 130:1dec54e4aec3 142 * @retval None
mbed_official 130:1dec54e4aec3 143 */
mbed_official 130:1dec54e4aec3 144 void CRC_PolynomialSizeSelect(uint32_t CRC_PolSize)
mbed_official 130:1dec54e4aec3 145 {
mbed_official 130:1dec54e4aec3 146 uint32_t tmpcr = 0;
mbed_official 130:1dec54e4aec3 147
mbed_official 130:1dec54e4aec3 148 /* Check the parameter */
mbed_official 130:1dec54e4aec3 149 assert_param(IS_CRC_POL_SIZE(CRC_PolSize));
mbed_official 130:1dec54e4aec3 150
mbed_official 130:1dec54e4aec3 151 /* Get CR register value */
mbed_official 130:1dec54e4aec3 152 tmpcr = CRC->CR;
mbed_official 130:1dec54e4aec3 153
mbed_official 130:1dec54e4aec3 154 /* Reset POL_SIZE bits */
mbed_official 130:1dec54e4aec3 155 tmpcr &= (uint32_t)~((uint32_t)CRC_CR_POLSIZE);
mbed_official 130:1dec54e4aec3 156 /* Set the polynomial size */
mbed_official 130:1dec54e4aec3 157 tmpcr |= (uint32_t)CRC_PolSize;
mbed_official 130:1dec54e4aec3 158
mbed_official 130:1dec54e4aec3 159 /* Write to CR register */
mbed_official 130:1dec54e4aec3 160 CRC->CR = (uint32_t)tmpcr;
mbed_official 130:1dec54e4aec3 161 }
mbed_official 130:1dec54e4aec3 162
mbed_official 130:1dec54e4aec3 163 /**
mbed_official 130:1dec54e4aec3 164 * @brief Selects the reverse operation to be performed on input data.
mbed_official 130:1dec54e4aec3 165 * @param CRC_ReverseInputData: Specifies the reverse operation on input data.
mbed_official 130:1dec54e4aec3 166 * This parameter can be:
mbed_official 130:1dec54e4aec3 167 * @arg CRC_ReverseInputData_No: No reverse operation is performed
mbed_official 130:1dec54e4aec3 168 * @arg CRC_ReverseInputData_8bits: reverse operation performed on 8 bits
mbed_official 130:1dec54e4aec3 169 * @arg CRC_ReverseInputData_16bits: reverse operation performed on 16 bits
mbed_official 130:1dec54e4aec3 170 * @arg CRC_ReverseInputData_32bits: reverse operation performed on 32 bits
mbed_official 130:1dec54e4aec3 171 * @retval None
mbed_official 130:1dec54e4aec3 172 */
mbed_official 130:1dec54e4aec3 173 void CRC_ReverseInputDataSelect(uint32_t CRC_ReverseInputData)
mbed_official 130:1dec54e4aec3 174 {
mbed_official 130:1dec54e4aec3 175 uint32_t tmpcr = 0;
mbed_official 130:1dec54e4aec3 176
mbed_official 130:1dec54e4aec3 177 /* Check the parameter */
mbed_official 130:1dec54e4aec3 178 assert_param(IS_CRC_REVERSE_INPUT_DATA(CRC_ReverseInputData));
mbed_official 130:1dec54e4aec3 179
mbed_official 130:1dec54e4aec3 180 /* Get CR register value */
mbed_official 130:1dec54e4aec3 181 tmpcr = CRC->CR;
mbed_official 130:1dec54e4aec3 182
mbed_official 130:1dec54e4aec3 183 /* Reset REV_IN bits */
mbed_official 130:1dec54e4aec3 184 tmpcr &= (uint32_t)~((uint32_t)CRC_CR_REV_IN);
mbed_official 130:1dec54e4aec3 185 /* Set the reverse operation */
mbed_official 130:1dec54e4aec3 186 tmpcr |= (uint32_t)CRC_ReverseInputData;
mbed_official 130:1dec54e4aec3 187
mbed_official 130:1dec54e4aec3 188 /* Write to CR register */
mbed_official 130:1dec54e4aec3 189 CRC->CR = (uint32_t)tmpcr;
mbed_official 130:1dec54e4aec3 190 }
mbed_official 130:1dec54e4aec3 191
mbed_official 130:1dec54e4aec3 192 /**
mbed_official 130:1dec54e4aec3 193 * @brief Enables or disable the reverse operation on output data.
mbed_official 130:1dec54e4aec3 194 * The reverse operation on output data is performed on 32-bit.
mbed_official 130:1dec54e4aec3 195 * @param NewState: new state of the reverse operation on output data.
mbed_official 130:1dec54e4aec3 196 * This parameter can be: ENABLE or DISABLE.
mbed_official 130:1dec54e4aec3 197 * @retval None
mbed_official 130:1dec54e4aec3 198 */
mbed_official 130:1dec54e4aec3 199 void CRC_ReverseOutputDataCmd(FunctionalState NewState)
mbed_official 130:1dec54e4aec3 200 {
mbed_official 130:1dec54e4aec3 201 /* Check the parameters */
mbed_official 130:1dec54e4aec3 202 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 130:1dec54e4aec3 203
mbed_official 130:1dec54e4aec3 204 if (NewState != DISABLE)
mbed_official 130:1dec54e4aec3 205 {
mbed_official 130:1dec54e4aec3 206 /* Enable reverse operation on output data */
mbed_official 130:1dec54e4aec3 207 CRC->CR |= CRC_CR_REV_OUT;
mbed_official 130:1dec54e4aec3 208 }
mbed_official 130:1dec54e4aec3 209 else
mbed_official 130:1dec54e4aec3 210 {
mbed_official 130:1dec54e4aec3 211 /* Disable reverse operation on output data */
mbed_official 130:1dec54e4aec3 212 CRC->CR &= (uint32_t)~((uint32_t)CRC_CR_REV_OUT);
mbed_official 130:1dec54e4aec3 213 }
mbed_official 130:1dec54e4aec3 214 }
mbed_official 130:1dec54e4aec3 215
mbed_official 130:1dec54e4aec3 216 /**
mbed_official 130:1dec54e4aec3 217 * @brief Initializes the INIT register.
mbed_official 130:1dec54e4aec3 218 * @note After resetting CRC calculation unit, CRC_InitValue is stored in DR register
mbed_official 130:1dec54e4aec3 219 * @param CRC_InitValue: Programmable initial CRC value
mbed_official 130:1dec54e4aec3 220 * @retval None
mbed_official 130:1dec54e4aec3 221 */
mbed_official 130:1dec54e4aec3 222 void CRC_SetInitRegister(uint32_t CRC_InitValue)
mbed_official 130:1dec54e4aec3 223 {
mbed_official 130:1dec54e4aec3 224 CRC->INIT = CRC_InitValue;
mbed_official 130:1dec54e4aec3 225 }
mbed_official 130:1dec54e4aec3 226
mbed_official 130:1dec54e4aec3 227 /**
mbed_official 130:1dec54e4aec3 228 * @brief Initializes the polynomail coefficients. This function is only
mbed_official 130:1dec54e4aec3 229 * applicable for STM32F072 devices.
mbed_official 130:1dec54e4aec3 230 * @param CRC_Pol: Polynomial to be used for CRC calculation.
mbed_official 130:1dec54e4aec3 231 * @retval None
mbed_official 130:1dec54e4aec3 232 */
mbed_official 130:1dec54e4aec3 233 void CRC_SetPolynomial(uint32_t CRC_Pol)
mbed_official 130:1dec54e4aec3 234 {
mbed_official 130:1dec54e4aec3 235 CRC->POL = CRC_Pol;
mbed_official 130:1dec54e4aec3 236 }
mbed_official 130:1dec54e4aec3 237
mbed_official 130:1dec54e4aec3 238 /**
mbed_official 130:1dec54e4aec3 239 * @}
mbed_official 130:1dec54e4aec3 240 */
mbed_official 130:1dec54e4aec3 241
mbed_official 130:1dec54e4aec3 242 /** @defgroup CRC_Group2 CRC computation of one/many 32-bit data functions
mbed_official 130:1dec54e4aec3 243 * @brief CRC computation of one/many 32-bit data functions
mbed_official 130:1dec54e4aec3 244 *
mbed_official 130:1dec54e4aec3 245 @verbatim
mbed_official 130:1dec54e4aec3 246 ===============================================================================
mbed_official 130:1dec54e4aec3 247 ##### CRC computation functions #####
mbed_official 130:1dec54e4aec3 248 ===============================================================================
mbed_official 130:1dec54e4aec3 249
mbed_official 130:1dec54e4aec3 250 @endverbatim
mbed_official 130:1dec54e4aec3 251 * @{
mbed_official 130:1dec54e4aec3 252 */
mbed_official 130:1dec54e4aec3 253
mbed_official 130:1dec54e4aec3 254 /**
mbed_official 130:1dec54e4aec3 255 * @brief Computes the 32-bit CRC of a given data word(32-bit).
mbed_official 130:1dec54e4aec3 256 * @param CRC_Data: data word(32-bit) to compute its CRC
mbed_official 130:1dec54e4aec3 257 * @retval 32-bit CRC
mbed_official 130:1dec54e4aec3 258 */
mbed_official 130:1dec54e4aec3 259 uint32_t CRC_CalcCRC(uint32_t CRC_Data)
mbed_official 130:1dec54e4aec3 260 {
mbed_official 130:1dec54e4aec3 261 CRC->DR = CRC_Data;
mbed_official 130:1dec54e4aec3 262
mbed_official 130:1dec54e4aec3 263 return (CRC->DR);
mbed_official 130:1dec54e4aec3 264 }
mbed_official 130:1dec54e4aec3 265
mbed_official 130:1dec54e4aec3 266 /**
mbed_official 130:1dec54e4aec3 267 * @brief Computes the 16-bit CRC of a given 16-bit data. This function is only
mbed_official 130:1dec54e4aec3 268 * applicable for STM32F072 devices.
mbed_official 130:1dec54e4aec3 269 * @param CRC_Data: data half-word(16-bit) to compute its CRC
mbed_official 130:1dec54e4aec3 270 * @retval 16-bit CRC
mbed_official 130:1dec54e4aec3 271 */
mbed_official 130:1dec54e4aec3 272 uint32_t CRC_CalcCRC16bits(uint16_t CRC_Data)
mbed_official 130:1dec54e4aec3 273 {
mbed_official 130:1dec54e4aec3 274 *(uint16_t*)(CRC_BASE) = (uint16_t) CRC_Data;
mbed_official 130:1dec54e4aec3 275
mbed_official 130:1dec54e4aec3 276 return (CRC->DR);
mbed_official 130:1dec54e4aec3 277 }
mbed_official 130:1dec54e4aec3 278
mbed_official 130:1dec54e4aec3 279 /**
mbed_official 130:1dec54e4aec3 280 * @brief Computes the 8-bit CRC of a given 8-bit data. This function is only
mbed_official 130:1dec54e4aec3 281 * applicable for STM32F072 devices.
mbed_official 130:1dec54e4aec3 282 * @param CRC_Data: 8-bit data to compute its CRC
mbed_official 130:1dec54e4aec3 283 * @retval 8-bit CRC
mbed_official 130:1dec54e4aec3 284 */
mbed_official 130:1dec54e4aec3 285 uint32_t CRC_CalcCRC8bits(uint8_t CRC_Data)
mbed_official 130:1dec54e4aec3 286 {
mbed_official 130:1dec54e4aec3 287 *(uint8_t*)(CRC_BASE) = (uint8_t) CRC_Data;
mbed_official 130:1dec54e4aec3 288
mbed_official 130:1dec54e4aec3 289 return (CRC->DR);
mbed_official 130:1dec54e4aec3 290 }
mbed_official 130:1dec54e4aec3 291
mbed_official 130:1dec54e4aec3 292 /**
mbed_official 130:1dec54e4aec3 293 * @brief Computes the 32-bit CRC of a given buffer of data word(32-bit).
mbed_official 130:1dec54e4aec3 294 * @param pBuffer: pointer to the buffer containing the data to be computed
mbed_official 130:1dec54e4aec3 295 * @param BufferLength: length of the buffer to be computed
mbed_official 130:1dec54e4aec3 296 * @retval 32-bit CRC
mbed_official 130:1dec54e4aec3 297 */
mbed_official 130:1dec54e4aec3 298 uint32_t CRC_CalcBlockCRC(uint32_t pBuffer[], uint32_t BufferLength)
mbed_official 130:1dec54e4aec3 299 {
mbed_official 130:1dec54e4aec3 300 uint32_t index = 0;
mbed_official 130:1dec54e4aec3 301
mbed_official 130:1dec54e4aec3 302 for(index = 0; index < BufferLength; index++)
mbed_official 130:1dec54e4aec3 303 {
mbed_official 130:1dec54e4aec3 304 CRC->DR = pBuffer[index];
mbed_official 130:1dec54e4aec3 305 }
mbed_official 130:1dec54e4aec3 306 return (CRC->DR);
mbed_official 130:1dec54e4aec3 307 }
mbed_official 130:1dec54e4aec3 308
mbed_official 130:1dec54e4aec3 309 /**
mbed_official 130:1dec54e4aec3 310 * @brief Returns the current CRC value.
mbed_official 130:1dec54e4aec3 311 * @param None
mbed_official 130:1dec54e4aec3 312 * @retval 32-bit CRC
mbed_official 130:1dec54e4aec3 313 */
mbed_official 130:1dec54e4aec3 314 uint32_t CRC_GetCRC(void)
mbed_official 130:1dec54e4aec3 315 {
mbed_official 130:1dec54e4aec3 316 return (CRC->DR);
mbed_official 130:1dec54e4aec3 317 }
mbed_official 130:1dec54e4aec3 318
mbed_official 130:1dec54e4aec3 319 /**
mbed_official 130:1dec54e4aec3 320 * @}
mbed_official 130:1dec54e4aec3 321 */
mbed_official 130:1dec54e4aec3 322
mbed_official 130:1dec54e4aec3 323 /** @defgroup CRC_Group3 CRC Independent Register (IDR) access functions
mbed_official 130:1dec54e4aec3 324 * @brief CRC Independent Register (IDR) access (write/read) functions
mbed_official 130:1dec54e4aec3 325 *
mbed_official 130:1dec54e4aec3 326 @verbatim
mbed_official 130:1dec54e4aec3 327 ===============================================================================
mbed_official 130:1dec54e4aec3 328 ##### CRC Independent Register (IDR) access functions #####
mbed_official 130:1dec54e4aec3 329 ===============================================================================
mbed_official 130:1dec54e4aec3 330
mbed_official 130:1dec54e4aec3 331 @endverbatim
mbed_official 130:1dec54e4aec3 332 * @{
mbed_official 130:1dec54e4aec3 333 */
mbed_official 130:1dec54e4aec3 334
mbed_official 130:1dec54e4aec3 335 /**
mbed_official 130:1dec54e4aec3 336 * @brief Stores an 8-bit data in the Independent Data(ID) register.
mbed_official 130:1dec54e4aec3 337 * @param CRC_IDValue: 8-bit value to be stored in the ID register
mbed_official 130:1dec54e4aec3 338 * @retval None
mbed_official 130:1dec54e4aec3 339 */
mbed_official 130:1dec54e4aec3 340 void CRC_SetIDRegister(uint8_t CRC_IDValue)
mbed_official 130:1dec54e4aec3 341 {
mbed_official 130:1dec54e4aec3 342 CRC->IDR = CRC_IDValue;
mbed_official 130:1dec54e4aec3 343 }
mbed_official 130:1dec54e4aec3 344
mbed_official 130:1dec54e4aec3 345 /**
mbed_official 130:1dec54e4aec3 346 * @brief Returns the 8-bit data stored in the Independent Data(ID) register
mbed_official 130:1dec54e4aec3 347 * @param None
mbed_official 130:1dec54e4aec3 348 * @retval 8-bit value of the ID register
mbed_official 130:1dec54e4aec3 349 */
mbed_official 130:1dec54e4aec3 350 uint8_t CRC_GetIDRegister(void)
mbed_official 130:1dec54e4aec3 351 {
mbed_official 130:1dec54e4aec3 352 return (CRC->IDR);
mbed_official 130:1dec54e4aec3 353 }
mbed_official 130:1dec54e4aec3 354
mbed_official 130:1dec54e4aec3 355 /**
mbed_official 130:1dec54e4aec3 356 * @}
mbed_official 130:1dec54e4aec3 357 */
mbed_official 130:1dec54e4aec3 358
mbed_official 130:1dec54e4aec3 359 /**
mbed_official 130:1dec54e4aec3 360 * @}
mbed_official 130:1dec54e4aec3 361 */
mbed_official 130:1dec54e4aec3 362
mbed_official 130:1dec54e4aec3 363 /**
mbed_official 130:1dec54e4aec3 364 * @}
mbed_official 130:1dec54e4aec3 365 */
mbed_official 130:1dec54e4aec3 366
mbed_official 130:1dec54e4aec3 367 /**
mbed_official 130:1dec54e4aec3 368 * @}
mbed_official 130:1dec54e4aec3 369 */
mbed_official 130:1dec54e4aec3 370
mbed_official 130:1dec54e4aec3 371 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/