shao ziyang / mbed-src-kl05

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targets/cmsis/TARGET_STM/TARGET_DISCO_F303VC/stm32f30x_crc.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
157:90e3acc479a2 
test with CLOCK_SETUP = 0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 157:90e3acc479a2 1 /**
mbed_official 157:90e3acc479a2 2 ******************************************************************************
mbed_official 157:90e3acc479a2 3 * @file stm32f30x_crc.c
mbed_official 157:90e3acc479a2 4 * @author MCD Application Team
mbed_official 157:90e3acc479a2 5 * @version V1.1.0
mbed_official 157:90e3acc479a2 6 * @date 27-February-2014
mbed_official 157:90e3acc479a2 7 * @brief This file provides firmware functions to manage the following
mbed_official 157:90e3acc479a2 8 * functionalities of CRC computation unit peripheral:
mbed_official 157:90e3acc479a2 9 * + Configuration of the CRC computation unit
mbed_official 157:90e3acc479a2 10 * + CRC computation of one/many 32-bit data
mbed_official 157:90e3acc479a2 11 * + CRC Independent register (IDR) access
mbed_official 157:90e3acc479a2 12 *
mbed_official 157:90e3acc479a2 13 @verbatim
mbed_official 157:90e3acc479a2 14
mbed_official 157:90e3acc479a2 15 ===============================================================================
mbed_official 157:90e3acc479a2 16 ##### How to use this driver #####
mbed_official 157:90e3acc479a2 17 ===============================================================================
mbed_official 157:90e3acc479a2 18 [..]
mbed_official 157:90e3acc479a2 19 (#) Enable CRC AHB clock using RCC_AHBPeriphClockCmd(RCC_AHBPeriph_CRC, ENABLE)
mbed_official 157:90e3acc479a2 20 function.
mbed_official 157:90e3acc479a2 21 (#) Select the polynomial size: 7-bit, 8-bit, 16-bit or 32-bit.
mbed_official 157:90e3acc479a2 22 (#) Set the polynomial coefficients using CRC_SetPolynomial();
mbed_official 157:90e3acc479a2 23 (#) If required, select the reverse operation on input data
mbed_official 157:90e3acc479a2 24 using CRC_ReverseInputDataSelect();
mbed_official 157:90e3acc479a2 25 (#) If required, enable the reverse operation on output data
mbed_official 157:90e3acc479a2 26 using CRC_ReverseOutputDataCmd(Enable);
mbed_official 157:90e3acc479a2 27 (#) If required, set the initialization remainder value using
mbed_official 157:90e3acc479a2 28 CRC_SetInitRegister();
mbed_official 157:90e3acc479a2 29 (#) use CRC_CalcCRC() function to compute the CRC of a 32-bit data
mbed_official 157:90e3acc479a2 30 or use CRC_CalcBlockCRC() function to compute the CRC if a 32-bit
mbed_official 157:90e3acc479a2 31 data buffer.
mbed_official 157:90e3acc479a2 32
mbed_official 157:90e3acc479a2 33 @endverbatim
mbed_official 157:90e3acc479a2 34
mbed_official 157:90e3acc479a2 35 ******************************************************************************
mbed_official 157:90e3acc479a2 36 * @attention
mbed_official 157:90e3acc479a2 37 *
mbed_official 157:90e3acc479a2 38 * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
mbed_official 157:90e3acc479a2 39 *
mbed_official 157:90e3acc479a2 40 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 157:90e3acc479a2 41 * are permitted provided that the following conditions are met:
mbed_official 157:90e3acc479a2 42 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 157:90e3acc479a2 43 * this list of conditions and the following disclaimer.
mbed_official 157:90e3acc479a2 44 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 157:90e3acc479a2 45 * this list of conditions and the following disclaimer in the documentation
mbed_official 157:90e3acc479a2 46 * and/or other materials provided with the distribution.
mbed_official 157:90e3acc479a2 47 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 157:90e3acc479a2 48 * may be used to endorse or promote products derived from this software
mbed_official 157:90e3acc479a2 49 * without specific prior written permission.
mbed_official 157:90e3acc479a2 50 *
mbed_official 157:90e3acc479a2 51 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 157:90e3acc479a2 52 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 157:90e3acc479a2 53 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 157:90e3acc479a2 54 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 157:90e3acc479a2 55 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 157:90e3acc479a2 56 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 157:90e3acc479a2 57 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 157:90e3acc479a2 58 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 157:90e3acc479a2 59 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 157:90e3acc479a2 60 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 157:90e3acc479a2 61 *
mbed_official 157:90e3acc479a2 62 ******************************************************************************
mbed_official 157:90e3acc479a2 63 */
mbed_official 157:90e3acc479a2 64
mbed_official 157:90e3acc479a2 65 /* Includes ------------------------------------------------------------------*/
mbed_official 157:90e3acc479a2 66 #include "stm32f30x_crc.h"
mbed_official 157:90e3acc479a2 67
mbed_official 157:90e3acc479a2 68 /** @addtogroup STM32F30x_StdPeriph_Driver
mbed_official 157:90e3acc479a2 69 * @{
mbed_official 157:90e3acc479a2 70 */
mbed_official 157:90e3acc479a2 71
mbed_official 157:90e3acc479a2 72 /** @defgroup CRC
mbed_official 157:90e3acc479a2 73 * @brief CRC driver modules
mbed_official 157:90e3acc479a2 74 * @{
mbed_official 157:90e3acc479a2 75 */
mbed_official 157:90e3acc479a2 76
mbed_official 157:90e3acc479a2 77 /* Private typedef -----------------------------------------------------------*/
mbed_official 157:90e3acc479a2 78 /* Private define ------------------------------------------------------------*/
mbed_official 157:90e3acc479a2 79 /* Private macro -------------------------------------------------------------*/
mbed_official 157:90e3acc479a2 80 /* Private variables ---------------------------------------------------------*/
mbed_official 157:90e3acc479a2 81 /* Private function prototypes -----------------------------------------------*/
mbed_official 157:90e3acc479a2 82 /* Private functions ---------------------------------------------------------*/
mbed_official 157:90e3acc479a2 83
mbed_official 157:90e3acc479a2 84 /** @defgroup CRC_Private_Functions
mbed_official 157:90e3acc479a2 85 * @{
mbed_official 157:90e3acc479a2 86 */
mbed_official 157:90e3acc479a2 87
mbed_official 157:90e3acc479a2 88 /** @defgroup CRC_Group1 Configuration of the CRC computation unit functions
mbed_official 157:90e3acc479a2 89 * @brief Configuration of the CRC computation unit functions
mbed_official 157:90e3acc479a2 90 *
mbed_official 157:90e3acc479a2 91 @verbatim
mbed_official 157:90e3acc479a2 92 ===============================================================================
mbed_official 157:90e3acc479a2 93 ##### CRC configuration functions #####
mbed_official 157:90e3acc479a2 94 ===============================================================================
mbed_official 157:90e3acc479a2 95
mbed_official 157:90e3acc479a2 96 @endverbatim
mbed_official 157:90e3acc479a2 97 * @{
mbed_official 157:90e3acc479a2 98 */
mbed_official 157:90e3acc479a2 99
mbed_official 157:90e3acc479a2 100 /**
mbed_official 157:90e3acc479a2 101 * @brief Deinitializes CRC peripheral registers to their default reset values.
mbed_official 157:90e3acc479a2 102 * @param None
mbed_official 157:90e3acc479a2 103 * @retval None
mbed_official 157:90e3acc479a2 104 */
mbed_official 157:90e3acc479a2 105 void CRC_DeInit(void)
mbed_official 157:90e3acc479a2 106 {
mbed_official 157:90e3acc479a2 107 /* Set DR register to reset value */
mbed_official 157:90e3acc479a2 108 CRC->DR = 0xFFFFFFFF;
mbed_official 157:90e3acc479a2 109 /* Set the POL register to the reset value: 0x04C11DB7 */
mbed_official 157:90e3acc479a2 110 CRC->POL = 0x04C11DB7;
mbed_official 157:90e3acc479a2 111 /* Reset IDR register */
mbed_official 157:90e3acc479a2 112 CRC->IDR = 0x00;
mbed_official 157:90e3acc479a2 113 /* Set INIT register to reset value */
mbed_official 157:90e3acc479a2 114 CRC->INIT = 0xFFFFFFFF;
mbed_official 157:90e3acc479a2 115 /* Reset the CRC calculation unit */
mbed_official 157:90e3acc479a2 116 CRC->CR = CRC_CR_RESET;
mbed_official 157:90e3acc479a2 117 }
mbed_official 157:90e3acc479a2 118
mbed_official 157:90e3acc479a2 119 /**
mbed_official 157:90e3acc479a2 120 * @brief Resets the CRC calculation unit and sets INIT register content in DR register.
mbed_official 157:90e3acc479a2 121 * @param None
mbed_official 157:90e3acc479a2 122 * @retval None
mbed_official 157:90e3acc479a2 123 */
mbed_official 157:90e3acc479a2 124 void CRC_ResetDR(void)
mbed_official 157:90e3acc479a2 125 {
mbed_official 157:90e3acc479a2 126 /* Reset CRC generator */
mbed_official 157:90e3acc479a2 127 CRC->CR |= CRC_CR_RESET;
mbed_official 157:90e3acc479a2 128 }
mbed_official 157:90e3acc479a2 129
mbed_official 157:90e3acc479a2 130 /**
mbed_official 157:90e3acc479a2 131 * @brief Selects the polynomial size.
mbed_official 157:90e3acc479a2 132 * @param CRC_PolSize: Specifies the polynomial size.
mbed_official 157:90e3acc479a2 133 * This parameter can be:
mbed_official 157:90e3acc479a2 134 * @arg CRC_PolSize_7: 7-bit polynomial for CRC calculation
mbed_official 157:90e3acc479a2 135 * @arg CRC_PolSize_8: 8-bit polynomial for CRC calculation
mbed_official 157:90e3acc479a2 136 * @arg CRC_PolSize_16: 16-bit polynomial for CRC calculation
mbed_official 157:90e3acc479a2 137 * @arg CRC_PolSize_32: 32-bit polynomial for CRC calculation
mbed_official 157:90e3acc479a2 138 * @retval None
mbed_official 157:90e3acc479a2 139 */
mbed_official 157:90e3acc479a2 140 void CRC_PolynomialSizeSelect(uint32_t CRC_PolSize)
mbed_official 157:90e3acc479a2 141 {
mbed_official 157:90e3acc479a2 142 uint32_t tmpcr = 0;
mbed_official 157:90e3acc479a2 143
mbed_official 157:90e3acc479a2 144 /* Check the parameter */
mbed_official 157:90e3acc479a2 145 assert_param(IS_CRC_POL_SIZE(CRC_PolSize));
mbed_official 157:90e3acc479a2 146
mbed_official 157:90e3acc479a2 147 /* Get CR register value */
mbed_official 157:90e3acc479a2 148 tmpcr = CRC->CR;
mbed_official 157:90e3acc479a2 149
mbed_official 157:90e3acc479a2 150 /* Reset POL_SIZE bits */
mbed_official 157:90e3acc479a2 151 tmpcr &= (uint32_t)~((uint32_t)CRC_CR_POLSIZE);
mbed_official 157:90e3acc479a2 152 /* Set the polynomial size */
mbed_official 157:90e3acc479a2 153 tmpcr |= (uint32_t)CRC_PolSize;
mbed_official 157:90e3acc479a2 154
mbed_official 157:90e3acc479a2 155 /* Write to CR register */
mbed_official 157:90e3acc479a2 156 CRC->CR = (uint32_t)tmpcr;
mbed_official 157:90e3acc479a2 157 }
mbed_official 157:90e3acc479a2 158
mbed_official 157:90e3acc479a2 159 /**
mbed_official 157:90e3acc479a2 160 * @brief Selects the reverse operation to be performed on input data.
mbed_official 157:90e3acc479a2 161 * @param CRC_ReverseInputData: Specifies the reverse operation on input data.
mbed_official 157:90e3acc479a2 162 * This parameter can be:
mbed_official 157:90e3acc479a2 163 * @arg CRC_ReverseInputData_No: No reverse operation is performed
mbed_official 157:90e3acc479a2 164 * @arg CRC_ReverseInputData_8bits: reverse operation performed on 8 bits
mbed_official 157:90e3acc479a2 165 * @arg CRC_ReverseInputData_16bits: reverse operation performed on 16 bits
mbed_official 157:90e3acc479a2 166 * @arg CRC_ReverseInputData_32bits: reverse operation performed on 32 bits
mbed_official 157:90e3acc479a2 167 * @retval None
mbed_official 157:90e3acc479a2 168 */
mbed_official 157:90e3acc479a2 169 void CRC_ReverseInputDataSelect(uint32_t CRC_ReverseInputData)
mbed_official 157:90e3acc479a2 170 {
mbed_official 157:90e3acc479a2 171 uint32_t tmpcr = 0;
mbed_official 157:90e3acc479a2 172
mbed_official 157:90e3acc479a2 173 /* Check the parameter */
mbed_official 157:90e3acc479a2 174 assert_param(IS_CRC_REVERSE_INPUT_DATA(CRC_ReverseInputData));
mbed_official 157:90e3acc479a2 175
mbed_official 157:90e3acc479a2 176 /* Get CR register value */
mbed_official 157:90e3acc479a2 177 tmpcr = CRC->CR;
mbed_official 157:90e3acc479a2 178
mbed_official 157:90e3acc479a2 179 /* Reset REV_IN bits */
mbed_official 157:90e3acc479a2 180 tmpcr &= (uint32_t)~((uint32_t)CRC_CR_REV_IN);
mbed_official 157:90e3acc479a2 181 /* Set the reverse operation */
mbed_official 157:90e3acc479a2 182 tmpcr |= (uint32_t)CRC_ReverseInputData;
mbed_official 157:90e3acc479a2 183
mbed_official 157:90e3acc479a2 184 /* Write to CR register */
mbed_official 157:90e3acc479a2 185 CRC->CR = (uint32_t)tmpcr;
mbed_official 157:90e3acc479a2 186 }
mbed_official 157:90e3acc479a2 187
mbed_official 157:90e3acc479a2 188 /**
mbed_official 157:90e3acc479a2 189 * @brief Enables or disable the reverse operation on output data.
mbed_official 157:90e3acc479a2 190 * The reverse operation on output data is performed on 32-bit.
mbed_official 157:90e3acc479a2 191 * @param NewState: new state of the reverse operation on output data.
mbed_official 157:90e3acc479a2 192 * This parameter can be: ENABLE or DISABLE.
mbed_official 157:90e3acc479a2 193 * @retval None
mbed_official 157:90e3acc479a2 194 */
mbed_official 157:90e3acc479a2 195 void CRC_ReverseOutputDataCmd(FunctionalState NewState)
mbed_official 157:90e3acc479a2 196 {
mbed_official 157:90e3acc479a2 197 /* Check the parameters */
mbed_official 157:90e3acc479a2 198 assert_param(IS_FUNCTIONAL_STATE(NewState));
mbed_official 157:90e3acc479a2 199
mbed_official 157:90e3acc479a2 200 if (NewState != DISABLE)
mbed_official 157:90e3acc479a2 201 {
mbed_official 157:90e3acc479a2 202 /* Enable reverse operation on output data */
mbed_official 157:90e3acc479a2 203 CRC->CR |= CRC_CR_REV_OUT;
mbed_official 157:90e3acc479a2 204 }
mbed_official 157:90e3acc479a2 205 else
mbed_official 157:90e3acc479a2 206 {
mbed_official 157:90e3acc479a2 207 /* Disable reverse operation on output data */
mbed_official 157:90e3acc479a2 208 CRC->CR &= (uint32_t)~((uint32_t)CRC_CR_REV_OUT);
mbed_official 157:90e3acc479a2 209 }
mbed_official 157:90e3acc479a2 210 }
mbed_official 157:90e3acc479a2 211
mbed_official 157:90e3acc479a2 212 /**
mbed_official 157:90e3acc479a2 213 * @brief Initializes the INIT register.
mbed_official 157:90e3acc479a2 214 * @note After resetting CRC calculation unit, CRC_InitValue is stored in DR register
mbed_official 157:90e3acc479a2 215 * @param CRC_InitValue: Programmable initial CRC value
mbed_official 157:90e3acc479a2 216 * @retval None
mbed_official 157:90e3acc479a2 217 */
mbed_official 157:90e3acc479a2 218 void CRC_SetInitRegister(uint32_t CRC_InitValue)
mbed_official 157:90e3acc479a2 219 {
mbed_official 157:90e3acc479a2 220 CRC->INIT = CRC_InitValue;
mbed_official 157:90e3acc479a2 221 }
mbed_official 157:90e3acc479a2 222
mbed_official 157:90e3acc479a2 223 /**
mbed_official 157:90e3acc479a2 224 * @brief Initializes the polynomail coefficients.
mbed_official 157:90e3acc479a2 225 * @param CRC_Pol: Polynomial to be used for CRC calculation.
mbed_official 157:90e3acc479a2 226 * @retval None
mbed_official 157:90e3acc479a2 227 */
mbed_official 157:90e3acc479a2 228 void CRC_SetPolynomial(uint32_t CRC_Pol)
mbed_official 157:90e3acc479a2 229 {
mbed_official 157:90e3acc479a2 230 CRC->POL = CRC_Pol;
mbed_official 157:90e3acc479a2 231 }
mbed_official 157:90e3acc479a2 232
mbed_official 157:90e3acc479a2 233 /**
mbed_official 157:90e3acc479a2 234 * @}
mbed_official 157:90e3acc479a2 235 */
mbed_official 157:90e3acc479a2 236
mbed_official 157:90e3acc479a2 237 /** @defgroup CRC_Group2 CRC computation of one/many 32-bit data functions
mbed_official 157:90e3acc479a2 238 * @brief CRC computation of one/many 32-bit data functions
mbed_official 157:90e3acc479a2 239 *
mbed_official 157:90e3acc479a2 240 @verbatim
mbed_official 157:90e3acc479a2 241 ===============================================================================
mbed_official 157:90e3acc479a2 242 ##### CRC computation functions #####
mbed_official 157:90e3acc479a2 243 ===============================================================================
mbed_official 157:90e3acc479a2 244
mbed_official 157:90e3acc479a2 245 @endverbatim
mbed_official 157:90e3acc479a2 246 * @{
mbed_official 157:90e3acc479a2 247 */
mbed_official 157:90e3acc479a2 248
mbed_official 157:90e3acc479a2 249 /**
mbed_official 157:90e3acc479a2 250 * @brief Computes the 32-bit CRC of a given data word(32-bit).
mbed_official 157:90e3acc479a2 251 * @param CRC_Data: data word(32-bit) to compute its CRC
mbed_official 157:90e3acc479a2 252 * @retval 32-bit CRC
mbed_official 157:90e3acc479a2 253 */
mbed_official 157:90e3acc479a2 254 uint32_t CRC_CalcCRC(uint32_t CRC_Data)
mbed_official 157:90e3acc479a2 255 {
mbed_official 157:90e3acc479a2 256 CRC->DR = CRC_Data;
mbed_official 157:90e3acc479a2 257
mbed_official 157:90e3acc479a2 258 return (CRC->DR);
mbed_official 157:90e3acc479a2 259 }
mbed_official 157:90e3acc479a2 260
mbed_official 157:90e3acc479a2 261 /**
mbed_official 157:90e3acc479a2 262 * @brief Computes the 16-bit CRC of a given 16-bit data.
mbed_official 157:90e3acc479a2 263 * @param CRC_Data: data half-word(16-bit) to compute its CRC
mbed_official 157:90e3acc479a2 264 * @retval 16-bit CRC
mbed_official 157:90e3acc479a2 265 */
mbed_official 157:90e3acc479a2 266 uint32_t CRC_CalcCRC16bits(uint16_t CRC_Data)
mbed_official 157:90e3acc479a2 267 {
mbed_official 157:90e3acc479a2 268 *(uint16_t*)(CRC_BASE) = (uint16_t) CRC_Data;
mbed_official 157:90e3acc479a2 269
mbed_official 157:90e3acc479a2 270 return (CRC->DR);
mbed_official 157:90e3acc479a2 271 }
mbed_official 157:90e3acc479a2 272
mbed_official 157:90e3acc479a2 273 /**
mbed_official 157:90e3acc479a2 274 * @brief Computes the 8-bit CRC of a given 8-bit data.
mbed_official 157:90e3acc479a2 275 * @param CRC_Data: 8-bit data to compute its CRC
mbed_official 157:90e3acc479a2 276 * @retval 8-bit CRC
mbed_official 157:90e3acc479a2 277 */
mbed_official 157:90e3acc479a2 278 uint32_t CRC_CalcCRC8bits(uint8_t CRC_Data)
mbed_official 157:90e3acc479a2 279 {
mbed_official 157:90e3acc479a2 280 *(uint8_t*)(CRC_BASE) = (uint8_t) CRC_Data;
mbed_official 157:90e3acc479a2 281
mbed_official 157:90e3acc479a2 282 return (CRC->DR);
mbed_official 157:90e3acc479a2 283 }
mbed_official 157:90e3acc479a2 284
mbed_official 157:90e3acc479a2 285 /**
mbed_official 157:90e3acc479a2 286 * @brief Computes the 32-bit CRC of a given buffer of data word(32-bit).
mbed_official 157:90e3acc479a2 287 * @param pBuffer: pointer to the buffer containing the data to be computed
mbed_official 157:90e3acc479a2 288 * @param BufferLength: length of the buffer to be computed
mbed_official 157:90e3acc479a2 289 * @retval 32-bit CRC
mbed_official 157:90e3acc479a2 290 */
mbed_official 157:90e3acc479a2 291 uint32_t CRC_CalcBlockCRC(uint32_t pBuffer[], uint32_t BufferLength)
mbed_official 157:90e3acc479a2 292 {
mbed_official 157:90e3acc479a2 293 uint32_t index = 0;
mbed_official 157:90e3acc479a2 294
mbed_official 157:90e3acc479a2 295 for(index = 0; index < BufferLength; index++)
mbed_official 157:90e3acc479a2 296 {
mbed_official 157:90e3acc479a2 297 CRC->DR = pBuffer[index];
mbed_official 157:90e3acc479a2 298 }
mbed_official 157:90e3acc479a2 299 return (CRC->DR);
mbed_official 157:90e3acc479a2 300 }
mbed_official 157:90e3acc479a2 301
mbed_official 157:90e3acc479a2 302 /**
mbed_official 157:90e3acc479a2 303 * @brief Returns the current CRC value.
mbed_official 157:90e3acc479a2 304 * @param None
mbed_official 157:90e3acc479a2 305 * @retval 32-bit CRC
mbed_official 157:90e3acc479a2 306 */
mbed_official 157:90e3acc479a2 307 uint32_t CRC_GetCRC(void)
mbed_official 157:90e3acc479a2 308 {
mbed_official 157:90e3acc479a2 309 return (CRC->DR);
mbed_official 157:90e3acc479a2 310 }
mbed_official 157:90e3acc479a2 311
mbed_official 157:90e3acc479a2 312 /**
mbed_official 157:90e3acc479a2 313 * @}
mbed_official 157:90e3acc479a2 314 */
mbed_official 157:90e3acc479a2 315
mbed_official 157:90e3acc479a2 316 /** @defgroup CRC_Group3 CRC Independent Register (IDR) access functions
mbed_official 157:90e3acc479a2 317 * @brief CRC Independent Register (IDR) access (write/read) functions
mbed_official 157:90e3acc479a2 318 *
mbed_official 157:90e3acc479a2 319 @verbatim
mbed_official 157:90e3acc479a2 320 ===============================================================================
mbed_official 157:90e3acc479a2 321 ##### CRC Independent Register (IDR) access functions #####
mbed_official 157:90e3acc479a2 322 ===============================================================================
mbed_official 157:90e3acc479a2 323
mbed_official 157:90e3acc479a2 324 @endverbatim
mbed_official 157:90e3acc479a2 325 * @{
mbed_official 157:90e3acc479a2 326 */
mbed_official 157:90e3acc479a2 327
mbed_official 157:90e3acc479a2 328 /**
mbed_official 157:90e3acc479a2 329 * @brief Stores an 8-bit data in the Independent Data(ID) register.
mbed_official 157:90e3acc479a2 330 * @param CRC_IDValue: 8-bit value to be stored in the ID register
mbed_official 157:90e3acc479a2 331 * @retval None
mbed_official 157:90e3acc479a2 332 */
mbed_official 157:90e3acc479a2 333 void CRC_SetIDRegister(uint8_t CRC_IDValue)
mbed_official 157:90e3acc479a2 334 {
mbed_official 157:90e3acc479a2 335 CRC->IDR = CRC_IDValue;
mbed_official 157:90e3acc479a2 336 }
mbed_official 157:90e3acc479a2 337
mbed_official 157:90e3acc479a2 338 /**
mbed_official 157:90e3acc479a2 339 * @brief Returns the 8-bit data stored in the Independent Data(ID) register
mbed_official 157:90e3acc479a2 340 * @param None
mbed_official 157:90e3acc479a2 341 * @retval 8-bit value of the ID register
mbed_official 157:90e3acc479a2 342 */
mbed_official 157:90e3acc479a2 343 uint8_t CRC_GetIDRegister(void)
mbed_official 157:90e3acc479a2 344 {
mbed_official 157:90e3acc479a2 345 return (CRC->IDR);
mbed_official 157:90e3acc479a2 346 }
mbed_official 157:90e3acc479a2 347
mbed_official 157:90e3acc479a2 348 /**
mbed_official 157:90e3acc479a2 349 * @}
mbed_official 157:90e3acc479a2 350 */
mbed_official 157:90e3acc479a2 351
mbed_official 157:90e3acc479a2 352 /**
mbed_official 157:90e3acc479a2 353 * @}
mbed_official 157:90e3acc479a2 354 */
mbed_official 157:90e3acc479a2 355
mbed_official 157:90e3acc479a2 356 /**
mbed_official 157:90e3acc479a2 357 * @}
mbed_official 157:90e3acc479a2 358 */
mbed_official 157:90e3acc479a2 359
mbed_official 157:90e3acc479a2 360 /**
mbed_official 157:90e3acc479a2 361 * @}
mbed_official 157:90e3acc479a2 362 */
mbed_official 157:90e3acc479a2 363
mbed_official 157:90e3acc479a2 364 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/