diff options
Diffstat (limited to 'tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32L0/stm32l0xx_hal_crc_ex.c')
| -rw-r--r-- | tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32L0/stm32l0xx_hal_crc_ex.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32L0/stm32l0xx_hal_crc_ex.c b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32L0/stm32l0xx_hal_crc_ex.c new file mode 100644 index 000000000..73343a066 --- /dev/null +++ b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32L0/stm32l0xx_hal_crc_ex.c @@ -0,0 +1,231 @@ +/** + ****************************************************************************** + * @file stm32l0xx_hal_crc_ex.c + * @author MCD Application Team + * @version V1.2.0 + * @date 06-February-2015 + * @brief Extended CRC HAL module driver. + * + * This file provides firmware functions to manage the following + * functionalities of the CRC peripheral: + * + Initialization/de-initialization functions + * + @verbatim + ============================================================================== + ##### CRC specific features ##### + ============================================================================== + [..] + (#) Polynomial configuration. + (#) Input data reverse mode. + (#) Output data reverse mode. + + @endverbatim + ****************************************************************************** + * @attention + * + * <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2> + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. Neither the name of STMicroelectronics nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************** + */ + +/* Includes ------------------------------------------------------------------*/ +#include "stm32l0xx_hal.h" + +/** @addtogroup STM32L0xx_HAL_Driver + * @{ + */ + +/** @addtogroup CRCEx + * @brief CRC Extended HAL module driver + * @{ + */ + +#ifdef HAL_CRC_MODULE_ENABLED + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ +/* Private macro -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ +/* Private function prototypes -----------------------------------------------*/ +/* Private functions ---------------------------------------------------------*/ + +/** @addtogroup CRCEx_Exported_Functions + * @{ + */ + +/** @addtogroup CRCEx_Exported_Functions_Group1 + * @brief Extended CRC features functions + * +@verbatim + =============================================================================== + ##### CRC Extended features functions ##### + =============================================================================== + [..] +This subsection provides function allowing to: + (+) Set CRC polynomial if different from default one. + +@endverbatim + * @{ + */ + + +/** + * @brief Initializes the CRC polynomial if different from default one. + * @param hcrc: CRC handle + * @param Pol: CRC generating polynomial (7, 8, 16 or 32-bit long) + * This parameter is written in normal representation, e.g. + * for a polynomial of degree 7, X^7 + X^6 + X^5 + X^2 + 1 is written 0x65 + * for a polynomial of degree 16, X^16 + X^12 + X^5 + 1 is written 0x1021 + * @param PolyLength: CRC polynomial length + * This parameter can be one of the following values: + * @arg CRC_POLYLENGTH_7B: 7-bit long CRC (generating polynomial of degree 7) + * @arg CRC_POLYLENGTH_8B: 8-bit long CRC (generating polynomial of degree 8) + * @arg CRC_POLYLENGTH_16B: 16-bit long CRC (generating polynomial of degree 16) + * @arg CRC_POLYLENGTH_32B: 32-bit long CRC (generating polynomial of degree 32) + * @retval HAL status + */ +HAL_StatusTypeDef HAL_CRCEx_Polynomial_Set(CRC_HandleTypeDef *hcrc, uint32_t Pol, uint32_t PolyLength) +{ + uint32_t msb = 31; /* polynomial degree is 32 at most, so msb is initialized to max value */ + + /* Check the parameters */ + assert_param(IS_CRC_POL_LENGTH(PolyLength)); + + /* check polynomial definition vs polynomial size: + * polynomial length must be aligned with polynomial + * definition. HAL_ERROR is reported if Pol degree is + * larger than that indicated by PolyLength. + * Look for MSB position: msb will contain the degree of + * the second to the largest polynomial member. E.g., for + * X^7 + X^6 + X^5 + X^2 + 1, msb = 6. */ + while (((Pol & ((uint32_t)(0x1) << msb)) == 0) && (msb-- > 0)); + + switch (PolyLength) + { + case CRC_POLYLENGTH_7B: + if (msb >= HAL_CRC_LENGTH_7B) return HAL_ERROR; + break; + case CRC_POLYLENGTH_8B: + if (msb >= HAL_CRC_LENGTH_8B) return HAL_ERROR; + break; + case CRC_POLYLENGTH_16B: + if (msb >= HAL_CRC_LENGTH_16B) return HAL_ERROR; + break; + case CRC_POLYLENGTH_32B: + /* no polynomial definition vs. polynomial length issue possible */ + break; + default: + break; + } + + /* set generating polynomial */ + WRITE_REG(hcrc->Instance->POL, Pol); + + /* set generating polynomial size */ + MODIFY_REG(hcrc->Instance->CR, CRC_CR_POLYSIZE, PolyLength); + + /* Return function status */ + return HAL_OK; +} + +/** + * @brief Set the Reverse Input data mode. + * @param hcrc: CRC handle + * @param InputReverseMode: Input Data inversion mode + * This parameter can be one of the following values: + * @arg CRC_INPUTDATA_INVERSION_NONE: no change in bit order (default value) + * @arg CRC_INPUTDATA_INVERSION_BYTE: Byte-wise bit reversal + * @arg CRC_INPUTDATA_INVERSION_HALFWORD: HalfWord-wise bit reversal + * @arg CRC_INPUTDATA_INVERSION_WORD: Word-wise bit reversal + * @retval HAL status + */ +HAL_StatusTypeDef HAL_CRCEx_Input_Data_Reverse(CRC_HandleTypeDef *hcrc, uint32_t InputReverseMode) +{ + /* Check the parameters */ + assert_param(IS_CRC_INPUTDATA_INVERSION_MODE(InputReverseMode)); + + /* Change CRC peripheral state */ + hcrc->State = HAL_CRC_STATE_BUSY; + + /* set input data inversion mode */ + MODIFY_REG(hcrc->Instance->CR, CRC_CR_REV_IN, InputReverseMode); + /* Change CRC peripheral state */ + hcrc->State = HAL_CRC_STATE_READY; + + /* Return function status */ + return HAL_OK; +} + +/** + * @brief Set the Reverse Output data mode. + * @param hcrc: CRC handle + * @param OutputReverseMode: Output Data inversion mode + * This parameter can be one of the following values: + * @arg CRC_OUTPUTDATA_INVERSION_DISABLE: no CRC inversion (default value) + * @arg CRC_OUTPUTDATA_INVERSION_ENABLE: bit-level inversion (e.g for a 8-bit CRC: 0xB5 becomes 0xAD) + * @retval HAL status + */ +HAL_StatusTypeDef HAL_CRCEx_Output_Data_Reverse(CRC_HandleTypeDef *hcrc, uint32_t OutputReverseMode) +{ + /* Check the parameters */ + assert_param(IS_CRC_OUTPUTDATA_INVERSION_MODE(OutputReverseMode)); + + /* Change CRC peripheral state */ + hcrc->State = HAL_CRC_STATE_BUSY; + + /* set output data inversion mode */ + MODIFY_REG(hcrc->Instance->CR, CRC_CR_REV_OUT, OutputReverseMode); + + /* Change CRC peripheral state */ + hcrc->State = HAL_CRC_STATE_READY; + + /* Return function status */ + return HAL_OK; +} + + + + +/** + * @} + */ + + +/** + * @} + */ + + +#endif /* HAL_CRC_MODULE_ENABLED */ +/** + * @} + */ + +/** + * @} + */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ + |