mirror of https://github.com/Desuuuu/klipper.git
138 lines
4.4 KiB
C
138 lines
4.4 KiB
C
/**
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******************************************************************************
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* @file stm32f0xx_ll_crc.c
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* @author MCD Application Team
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* @brief CRC LL module driver.
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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*/
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#if defined(USE_FULL_LL_DRIVER)
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f0xx_ll_crc.h"
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#ifdef USE_FULL_ASSERT
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#include "stm32_assert.h"
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#else
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#define assert_param(expr) ((void)0U)
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#endif
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/** @addtogroup STM32F0xx_LL_Driver
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* @{
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*/
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#if defined (CRC)
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/** @addtogroup CRC_LL
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* @{
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*/
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/* Private types -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private constants ---------------------------------------------------------*/
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/* Private macros ------------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Exported functions --------------------------------------------------------*/
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/** @addtogroup CRC_LL_Exported_Functions
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* @{
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*/
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/** @addtogroup CRC_LL_EF_Init
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* @{
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*/
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/**
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* @brief De-initialize CRC registers (Registers restored to their default values).
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* @param CRCx CRC Instance
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* @retval An ErrorStatus enumeration value:
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* - SUCCESS: CRC registers are de-initialized
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* - ERROR: CRC registers are not de-initialized
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*/
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ErrorStatus LL_CRC_DeInit(CRC_TypeDef *CRCx)
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{
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ErrorStatus status = SUCCESS;
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/* Check the parameters */
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assert_param(IS_CRC_ALL_INSTANCE(CRCx));
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if (CRCx == CRC)
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{
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#if defined(CRC_PROG_POLYNOMIAL_SUPPORT)
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/* Set programmable polynomial size in CR register to reset value (32 bits)*/
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LL_CRC_SetPolynomialSize(CRCx, LL_CRC_POLYLENGTH_32B);
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/* Set programmable polynomial in POL register to reset value */
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LL_CRC_SetPolynomialCoef(CRCx, LL_CRC_DEFAULT_CRC32_POLY);
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#endif
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/* Set INIT register to reset value */
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LL_CRC_SetInitialData(CRCx, LL_CRC_DEFAULT_CRC_INITVALUE);
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/* Set Reversibility options on I/O data values in CR register to reset value */
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LL_CRC_SetInputDataReverseMode(CRCx, LL_CRC_INDATA_REVERSE_NONE);
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LL_CRC_SetOutputDataReverseMode(CRCx, LL_CRC_OUTDATA_REVERSE_NONE);
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/* Reset the CRC calculation unit */
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LL_CRC_ResetCRCCalculationUnit(CRCx);
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/* Reset IDR register */
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LL_CRC_Write_IDR(CRCx, 0x00U);
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}
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else
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{
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status = ERROR;
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}
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return (status);
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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#endif /* defined (CRC) */
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/**
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* @}
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*/
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#endif /* USE_FULL_LL_DRIVER */
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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