STM32F439xx HAL User Manual
stm32f4xx_ll_crc.c
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00001 /**
00002   ******************************************************************************
00003   * @file    stm32f4xx_ll_crc.c
00004   * @author  MCD Application Team
00005   * @brief   CRC LL module driver.
00006   ******************************************************************************
00007   * @attention
00008   *
00009   * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
00010   *
00011   * Redistribution and use in source and binary forms, with or without modification,
00012   * are permitted provided that the following conditions are met:
00013   *   1. Redistributions of source code must retain the above copyright notice,
00014   *      this list of conditions and the following disclaimer.
00015   *   2. Redistributions in binary form must reproduce the above copyright notice,
00016   *      this list of conditions and the following disclaimer in the documentation
00017   *      and/or other materials provided with the distribution.
00018   *   3. Neither the name of STMicroelectronics nor the names of its contributors
00019   *      may be used to endorse or promote products derived from this software
00020   *      without specific prior written permission.
00021   *
00022   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00023   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00024   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00025   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
00026   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00027   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
00028   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
00029   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00030   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00031   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00032   *
00033   ******************************************************************************
00034   */
00035 #if defined(USE_FULL_LL_DRIVER)
00036 
00037 /* Includes ------------------------------------------------------------------*/
00038 #include "stm32f4xx_ll_crc.h"
00039 #include "stm32f4xx_ll_bus.h"
00040 
00041 #ifdef  USE_FULL_ASSERT
00042 #include "stm32_assert.h"
00043 #else
00044 #define assert_param(expr) ((void)0U)
00045 #endif
00046 
00047 /** @addtogroup STM32F4xx_LL_Driver
00048   * @{
00049   */
00050 
00051 #if defined (CRC)
00052 
00053 /** @addtogroup CRC_LL
00054   * @{
00055   */
00056 
00057 /* Private types -------------------------------------------------------------*/
00058 /* Private variables ---------------------------------------------------------*/
00059 /* Private constants ---------------------------------------------------------*/
00060 /* Private macros ------------------------------------------------------------*/
00061 /* Private function prototypes -----------------------------------------------*/
00062 
00063 /* Exported functions --------------------------------------------------------*/
00064 /** @addtogroup CRC_LL_Exported_Functions
00065   * @{
00066   */
00067 
00068 /** @addtogroup CRC_LL_EF_Init
00069   * @{
00070   */
00071 
00072 /**
00073   * @brief  De-initialize CRC registers (Registers restored to their default values).
00074   * @param  CRCx CRC Instance
00075   * @retval An ErrorStatus enumeration value:
00076   *          - SUCCESS: CRC registers are de-initialized
00077   *          - ERROR: CRC registers are not de-initialized
00078   */
00079 ErrorStatus LL_CRC_DeInit(CRC_TypeDef *CRCx)
00080 {
00081   ErrorStatus status = SUCCESS;
00082 
00083   /* Check the parameters */
00084   assert_param(IS_CRC_ALL_INSTANCE(CRCx));
00085 
00086   if (CRCx == CRC)
00087   {
00088     /* Force CRC reset */
00089     LL_AHB1_GRP1_ForceReset(LL_AHB1_GRP1_PERIPH_CRC);
00090 
00091     /* Release CRC reset */
00092     LL_AHB1_GRP1_ReleaseReset(LL_AHB1_GRP1_PERIPH_CRC);
00093   }
00094   else
00095   {
00096     status = ERROR;
00097   }
00098 
00099   return (status);
00100 }
00101 
00102 /**
00103   * @}
00104   */
00105 
00106 /**
00107   * @}
00108   */
00109 
00110 /**
00111   * @}
00112   */
00113 
00114 #endif /* defined (CRC) */
00115 
00116 /**
00117   * @}
00118   */
00119 
00120 #endif /* USE_FULL_LL_DRIVER */
00121 
00122 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
00123