Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32F7/stm32f7xx_hal_crc_ex.c@0:9b334a45a8ff, 2015-10-01 (annotated)

Committer:
bogdanm
Date:
Thu Oct 01 15:25:22 2015 +0300
Revision:
0:9b334a45a8ff
Child:
83:a036322b8637
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 stm32f7xx_hal_crc_ex.c
bogdanm 0:9b334a45a8ff 4 * @author MCD Application Team
bogdanm 0:9b334a45a8ff 5 * @version V1.0.1
bogdanm 0:9b334a45a8ff 6 * @date 25-June-2015
bogdanm 0:9b334a45a8ff 7 * @brief Extended CRC HAL module driver.
bogdanm 0:9b334a45a8ff 8 *
bogdanm 0:9b334a45a8ff 9 * This file provides firmware functions to manage the following
bogdanm 0:9b334a45a8ff 10 * functionalities of the CRC peripheral:
bogdanm 0:9b334a45a8ff 11 * + Initialization/de-initialization functions
bogdanm 0:9b334a45a8ff 12 *
bogdanm 0:9b334a45a8ff 13 @verbatim
bogdanm 0:9b334a45a8ff 14 ==============================================================================
bogdanm 0:9b334a45a8ff 15 ##### CRC specific features #####
bogdanm 0:9b334a45a8ff 16 ==============================================================================
bogdanm 0:9b334a45a8ff 17 [..]
bogdanm 0:9b334a45a8ff 18 (#) Polynomial configuration.
bogdanm 0:9b334a45a8ff 19 (#) Input data reverse mode.
bogdanm 0:9b334a45a8ff 20 (#) Output data reverse mode.
bogdanm 0:9b334a45a8ff 21
bogdanm 0:9b334a45a8ff 22 @endverbatim
bogdanm 0:9b334a45a8ff 23 ******************************************************************************
bogdanm 0:9b334a45a8ff 24 * @attention
bogdanm 0:9b334a45a8ff 25 *
bogdanm 0:9b334a45a8ff 26 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
bogdanm 0:9b334a45a8ff 27 *
bogdanm 0:9b334a45a8ff 28 * Redistribution and use in source and binary forms, with or without modification,
bogdanm 0:9b334a45a8ff 29 * are permitted provided that the following conditions are met:
bogdanm 0:9b334a45a8ff 30 * 1. Redistributions of source code must retain the above copyright notice,
bogdanm 0:9b334a45a8ff 31 * this list of conditions and the following disclaimer.
bogdanm 0:9b334a45a8ff 32 * 2. Redistributions in binary form must reproduce the above copyright notice,
bogdanm 0:9b334a45a8ff 33 * this list of conditions and the following disclaimer in the documentation
bogdanm 0:9b334a45a8ff 34 * and/or other materials provided with the distribution.
bogdanm 0:9b334a45a8ff 35 * 3. Neither the name of STMicroelectronics nor the names of its contributors
bogdanm 0:9b334a45a8ff 36 * may be used to endorse or promote products derived from this software
bogdanm 0:9b334a45a8ff 37 * without specific prior written permission.
bogdanm 0:9b334a45a8ff 38 *
bogdanm 0:9b334a45a8ff 39 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
bogdanm 0:9b334a45a8ff 40 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
bogdanm 0:9b334a45a8ff 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
bogdanm 0:9b334a45a8ff 42 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
bogdanm 0:9b334a45a8ff 43 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
bogdanm 0:9b334a45a8ff 44 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
bogdanm 0:9b334a45a8ff 45 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
bogdanm 0:9b334a45a8ff 46 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
bogdanm 0:9b334a45a8ff 47 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
bogdanm 0:9b334a45a8ff 48 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bogdanm 0:9b334a45a8ff 49 *
bogdanm 0:9b334a45a8ff 50 ******************************************************************************
bogdanm 0:9b334a45a8ff 51 */
bogdanm 0:9b334a45a8ff 52
bogdanm 0:9b334a45a8ff 53 /* Includes ------------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 54 #include "stm32f7xx_hal.h"
bogdanm 0:9b334a45a8ff 55
bogdanm 0:9b334a45a8ff 56 /** @addtogroup STM32F7xx_HAL_Driver
bogdanm 0:9b334a45a8ff 57 * @{
bogdanm 0:9b334a45a8ff 58 */
bogdanm 0:9b334a45a8ff 59
bogdanm 0:9b334a45a8ff 60 /** @addtogroup CRCEx
bogdanm 0:9b334a45a8ff 61 * @brief CRC Extended HAL module driver
bogdanm 0:9b334a45a8ff 62 * @{
bogdanm 0:9b334a45a8ff 63 */
bogdanm 0:9b334a45a8ff 64
bogdanm 0:9b334a45a8ff 65 #ifdef HAL_CRC_MODULE_ENABLED
bogdanm 0:9b334a45a8ff 66
bogdanm 0:9b334a45a8ff 67 /* Private typedef -----------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 68 /* Private define ------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 69 /* Private macro -------------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 70 /* Private variables ---------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 71 /* Private function prototypes -----------------------------------------------*/
bogdanm 0:9b334a45a8ff 72 /* Private functions ---------------------------------------------------------*/
bogdanm 0:9b334a45a8ff 73
bogdanm 0:9b334a45a8ff 74 /** @addtogroup CRCEx_Exported_Functions
bogdanm 0:9b334a45a8ff 75 * @{
bogdanm 0:9b334a45a8ff 76 */
bogdanm 0:9b334a45a8ff 77
bogdanm 0:9b334a45a8ff 78 /** @addtogroup CRCEx_Exported_Functions_Group1
bogdanm 0:9b334a45a8ff 79 * @brief Extended CRC features functions
bogdanm 0:9b334a45a8ff 80 *
bogdanm 0:9b334a45a8ff 81 @verbatim
bogdanm 0:9b334a45a8ff 82 ===============================================================================
bogdanm 0:9b334a45a8ff 83 ##### CRC Extended features functions #####
bogdanm 0:9b334a45a8ff 84 ===============================================================================
bogdanm 0:9b334a45a8ff 85 [..]
bogdanm 0:9b334a45a8ff 86 This subsection provides function allowing to:
bogdanm 0:9b334a45a8ff 87 (+) Set CRC polynomial if different from default one.
bogdanm 0:9b334a45a8ff 88
bogdanm 0:9b334a45a8ff 89 @endverbatim
bogdanm 0:9b334a45a8ff 90 * @{
bogdanm 0:9b334a45a8ff 91 */
bogdanm 0:9b334a45a8ff 92
bogdanm 0:9b334a45a8ff 93
bogdanm 0:9b334a45a8ff 94 /**
bogdanm 0:9b334a45a8ff 95 * @brief Initializes the CRC polynomial if different from default one.
bogdanm 0:9b334a45a8ff 96 * @param hcrc: CRC handle
bogdanm 0:9b334a45a8ff 97 * @param Pol: CRC generating polynomial (7, 8, 16 or 32-bit long)
bogdanm 0:9b334a45a8ff 98 * This parameter is written in normal representation, e.g.
bogdanm 0:9b334a45a8ff 99 * for a polynomial of degree 7, X^7 + X^6 + X^5 + X^2 + 1 is written 0x65
bogdanm 0:9b334a45a8ff 100 * for a polynomial of degree 16, X^16 + X^12 + X^5 + 1 is written 0x1021
bogdanm 0:9b334a45a8ff 101 * @param PolyLength: CRC polynomial length
bogdanm 0:9b334a45a8ff 102 * This parameter can be one of the following values:
bogdanm 0:9b334a45a8ff 103 * @arg CRC_POLYLENGTH_7B: 7-bit long CRC (generating polynomial of degree 7)
bogdanm 0:9b334a45a8ff 104 * @arg CRC_POLYLENGTH_8B: 8-bit long CRC (generating polynomial of degree 8)
bogdanm 0:9b334a45a8ff 105 * @arg CRC_POLYLENGTH_16B: 16-bit long CRC (generating polynomial of degree 16)
bogdanm 0:9b334a45a8ff 106 * @arg CRC_POLYLENGTH_32B: 32-bit long CRC (generating polynomial of degree 32)
bogdanm 0:9b334a45a8ff 107 * @retval HAL status
bogdanm 0:9b334a45a8ff 108 */
bogdanm 0:9b334a45a8ff 109 HAL_StatusTypeDef HAL_CRCEx_Polynomial_Set(CRC_HandleTypeDef *hcrc, uint32_t Pol, uint32_t PolyLength)
bogdanm 0:9b334a45a8ff 110 {
bogdanm 0:9b334a45a8ff 111 uint32_t msb = 31; /* polynomial degree is 32 at most, so msb is initialized to max value */
bogdanm 0:9b334a45a8ff 112
bogdanm 0:9b334a45a8ff 113 /* Check the parameters */
bogdanm 0:9b334a45a8ff 114 assert_param(IS_CRC_POL_LENGTH(PolyLength));
bogdanm 0:9b334a45a8ff 115
bogdanm 0:9b334a45a8ff 116 /* check polynomial definition vs polynomial size:
bogdanm 0:9b334a45a8ff 117 * polynomial length must be aligned with polynomial
bogdanm 0:9b334a45a8ff 118 * definition. HAL_ERROR is reported if Pol degree is
bogdanm 0:9b334a45a8ff 119 * larger than that indicated by PolyLength.
bogdanm 0:9b334a45a8ff 120 * Look for MSB position: msb will contain the degree of
bogdanm 0:9b334a45a8ff 121 * the second to the largest polynomial member. E.g., for
bogdanm 0:9b334a45a8ff 122 * X^7 + X^6 + X^5 + X^2 + 1, msb = 6. */
bogdanm 0:9b334a45a8ff 123 while (((Pol & ((uint32_t)(0x1) << msb)) == 0) && (msb-- > 0))
bogdanm 0:9b334a45a8ff 124 {
bogdanm 0:9b334a45a8ff 125 }
bogdanm 0:9b334a45a8ff 126
bogdanm 0:9b334a45a8ff 127 switch (PolyLength)
bogdanm 0:9b334a45a8ff 128 {
bogdanm 0:9b334a45a8ff 129 case CRC_POLYLENGTH_7B:
bogdanm 0:9b334a45a8ff 130 if (msb >= HAL_CRC_LENGTH_7B)
bogdanm 0:9b334a45a8ff 131 {
bogdanm 0:9b334a45a8ff 132 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 133 }
bogdanm 0:9b334a45a8ff 134 break;
bogdanm 0:9b334a45a8ff 135 case CRC_POLYLENGTH_8B:
bogdanm 0:9b334a45a8ff 136 if (msb >= HAL_CRC_LENGTH_8B)
bogdanm 0:9b334a45a8ff 137 {
bogdanm 0:9b334a45a8ff 138 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 139 }
bogdanm 0:9b334a45a8ff 140 break;
bogdanm 0:9b334a45a8ff 141 case CRC_POLYLENGTH_16B:
bogdanm 0:9b334a45a8ff 142 if (msb >= HAL_CRC_LENGTH_16B)
bogdanm 0:9b334a45a8ff 143 {
bogdanm 0:9b334a45a8ff 144 return HAL_ERROR;
bogdanm 0:9b334a45a8ff 145 }
bogdanm 0:9b334a45a8ff 146 break;
bogdanm 0:9b334a45a8ff 147 case CRC_POLYLENGTH_32B:
bogdanm 0:9b334a45a8ff 148 /* no polynomial definition vs. polynomial length issue possible */
bogdanm 0:9b334a45a8ff 149 break;
bogdanm 0:9b334a45a8ff 150 default:
bogdanm 0:9b334a45a8ff 151 break;
bogdanm 0:9b334a45a8ff 152 }
bogdanm 0:9b334a45a8ff 153
bogdanm 0:9b334a45a8ff 154 /* set generating polynomial */
bogdanm 0:9b334a45a8ff 155 WRITE_REG(hcrc->Instance->POL, Pol);
bogdanm 0:9b334a45a8ff 156
bogdanm 0:9b334a45a8ff 157 /* set generating polynomial size */
bogdanm 0:9b334a45a8ff 158 MODIFY_REG(hcrc->Instance->CR, CRC_CR_POLYSIZE, PolyLength);
bogdanm 0:9b334a45a8ff 159
bogdanm 0:9b334a45a8ff 160 /* Return function status */
bogdanm 0:9b334a45a8ff 161 return HAL_OK;
bogdanm 0:9b334a45a8ff 162 }
bogdanm 0:9b334a45a8ff 163
bogdanm 0:9b334a45a8ff 164 /**
bogdanm 0:9b334a45a8ff 165 * @brief Set the Reverse Input data mode.
bogdanm 0:9b334a45a8ff 166 * @param hcrc: CRC handle
bogdanm 0:9b334a45a8ff 167 * @param InputReverseMode: Input Data inversion mode
bogdanm 0:9b334a45a8ff 168 * This parameter can be one of the following values:
bogdanm 0:9b334a45a8ff 169 * @arg CRC_INPUTDATA_INVERSION_NONE: no change in bit order (default value)
bogdanm 0:9b334a45a8ff 170 * @arg CRC_INPUTDATA_INVERSION_BYTE: Byte-wise bit reversal
bogdanm 0:9b334a45a8ff 171 * @arg CRC_INPUTDATA_INVERSION_HALFWORD: HalfWord-wise bit reversal
bogdanm 0:9b334a45a8ff 172 * @arg CRC_INPUTDATA_INVERSION_WORD: Word-wise bit reversal
bogdanm 0:9b334a45a8ff 173 * @retval HAL status
bogdanm 0:9b334a45a8ff 174 */
bogdanm 0:9b334a45a8ff 175 HAL_StatusTypeDef HAL_CRCEx_Input_Data_Reverse(CRC_HandleTypeDef *hcrc, uint32_t InputReverseMode)
bogdanm 0:9b334a45a8ff 176 {
bogdanm 0:9b334a45a8ff 177 /* Check the parameters */
bogdanm 0:9b334a45a8ff 178 assert_param(IS_CRC_INPUTDATA_INVERSION_MODE(InputReverseMode));
bogdanm 0:9b334a45a8ff 179
bogdanm 0:9b334a45a8ff 180 /* Change CRC peripheral state */
bogdanm 0:9b334a45a8ff 181 hcrc->State = HAL_CRC_STATE_BUSY;
bogdanm 0:9b334a45a8ff 182
bogdanm 0:9b334a45a8ff 183 /* set input data inversion mode */
bogdanm 0:9b334a45a8ff 184 MODIFY_REG(hcrc->Instance->CR, CRC_CR_REV_IN, InputReverseMode);
bogdanm 0:9b334a45a8ff 185 /* Change CRC peripheral state */
bogdanm 0:9b334a45a8ff 186 hcrc->State = HAL_CRC_STATE_READY;
bogdanm 0:9b334a45a8ff 187
bogdanm 0:9b334a45a8ff 188 /* Return function status */
bogdanm 0:9b334a45a8ff 189 return HAL_OK;
bogdanm 0:9b334a45a8ff 190 }
bogdanm 0:9b334a45a8ff 191
bogdanm 0:9b334a45a8ff 192 /**
bogdanm 0:9b334a45a8ff 193 * @brief Set the Reverse Output data mode.
bogdanm 0:9b334a45a8ff 194 * @param hcrc: CRC handle
bogdanm 0:9b334a45a8ff 195 * @param OutputReverseMode: Output Data inversion mode
bogdanm 0:9b334a45a8ff 196 * This parameter can be one of the following values:
bogdanm 0:9b334a45a8ff 197 * @arg CRC_OUTPUTDATA_INVERSION_DISABLE: no CRC inversion (default value)
bogdanm 0:9b334a45a8ff 198 * @arg CRC_OUTPUTDATA_INVERSION_ENABLE: bit-level inversion (e.g for a 8-bit CRC: 0xB5 becomes 0xAD)
bogdanm 0:9b334a45a8ff 199 * @retval HAL status
bogdanm 0:9b334a45a8ff 200 */
bogdanm 0:9b334a45a8ff 201 HAL_StatusTypeDef HAL_CRCEx_Output_Data_Reverse(CRC_HandleTypeDef *hcrc, uint32_t OutputReverseMode)
bogdanm 0:9b334a45a8ff 202 {
bogdanm 0:9b334a45a8ff 203 /* Check the parameters */
bogdanm 0:9b334a45a8ff 204 assert_param(IS_CRC_OUTPUTDATA_INVERSION_MODE(OutputReverseMode));
bogdanm 0:9b334a45a8ff 205
bogdanm 0:9b334a45a8ff 206 /* Change CRC peripheral state */
bogdanm 0:9b334a45a8ff 207 hcrc->State = HAL_CRC_STATE_BUSY;
bogdanm 0:9b334a45a8ff 208
bogdanm 0:9b334a45a8ff 209 /* set output data inversion mode */
bogdanm 0:9b334a45a8ff 210 MODIFY_REG(hcrc->Instance->CR, CRC_CR_REV_OUT, OutputReverseMode);
bogdanm 0:9b334a45a8ff 211
bogdanm 0:9b334a45a8ff 212 /* Change CRC peripheral state */
bogdanm 0:9b334a45a8ff 213 hcrc->State = HAL_CRC_STATE_READY;
bogdanm 0:9b334a45a8ff 214
bogdanm 0:9b334a45a8ff 215 /* Return function status */
bogdanm 0:9b334a45a8ff 216 return HAL_OK;
bogdanm 0:9b334a45a8ff 217 }
bogdanm 0:9b334a45a8ff 218
bogdanm 0:9b334a45a8ff 219
bogdanm 0:9b334a45a8ff 220
bogdanm 0:9b334a45a8ff 221
bogdanm 0:9b334a45a8ff 222 /**
bogdanm 0:9b334a45a8ff 223 * @}
bogdanm 0:9b334a45a8ff 224 */
bogdanm 0:9b334a45a8ff 225
bogdanm 0:9b334a45a8ff 226
bogdanm 0:9b334a45a8ff 227 /**
bogdanm 0:9b334a45a8ff 228 * @}
bogdanm 0:9b334a45a8ff 229 */
bogdanm 0:9b334a45a8ff 230
bogdanm 0:9b334a45a8ff 231
bogdanm 0:9b334a45a8ff 232 #endif /* HAL_CRC_MODULE_ENABLED */
bogdanm 0:9b334a45a8ff 233 /**
bogdanm 0:9b334a45a8ff 234 * @}
bogdanm 0:9b334a45a8ff 235 */
bogdanm 0:9b334a45a8ff 236
bogdanm 0:9b334a45a8ff 237 /**
bogdanm 0:9b334a45a8ff 238 * @}
bogdanm 0:9b334a45a8ff 239 */
bogdanm 0:9b334a45a8ff 240
bogdanm 0:9b334a45a8ff 241 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
bogdanm 0:9b334a45a8ff 242