stm32l4xx_ll_crc.c

00001 /**
00002   ******************************************************************************
00003   * @file    stm32l4xx_ll_crc.c
00004   * @author  MCD Application Team
00005   * @version V1.5.1
00006   * @date    31-May-2016
00007   * @brief   CRC LL module driver.
00008   ******************************************************************************
00009   * @attention
00010   *
00011   * <h2><center>&copy; COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
00012   *
00013   * Redistribution and use in source and binary forms, with or without modification,
00014   * are permitted provided that the following conditions are met:
00015   *   1. Redistributions of source code must retain the above copyright notice,
00016   *      this list of conditions and the following disclaimer.
00017   *   2. Redistributions in binary form must reproduce the above copyright notice,
00018   *      this list of conditions and the following disclaimer in the documentation
00019   *      and/or other materials provided with the distribution.
00020   *   3. Neither the name of STMicroelectronics nor the names of its contributors
00021   *      may be used to endorse or promote products derived from this software
00022   *      without specific prior written permission.
00023   *
00024   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
00025   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00026   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
00027   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
00028   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00029   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
00030   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
00031   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
00032   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
00033   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00034   *
00035   ******************************************************************************
00036   */
00037 #if defined(USE_FULL_LL_DRIVER)
00038 
00039 /* Includes ------------------------------------------------------------------*/
00040 #include "stm32l4xx_ll_crc.h"
00041 #include "stm32l4xx_ll_bus.h"
00042 
00043 #ifdef  USE_FULL_ASSERT
00044 #include "stm32_assert.h"
00045 #else
00046 #define assert_param(expr) ((void)0U)
00047 #endif
00048 
00049 /** @addtogroup STM32L4xx_LL_Driver
00050   * @{
00051   */
00052 
00053 #if defined (CRC)
00054 
00055 /** @addtogroup CRC_LL
00056   * @{
00057   */
00058 
00059 /* Private types -------------------------------------------------------------*/
00060 /* Private variables ---------------------------------------------------------*/
00061 /* Private constants ---------------------------------------------------------*/
00062 /* Private macros ------------------------------------------------------------*/
00063 /* Private function prototypes -----------------------------------------------*/
00064 
00065 /* Exported functions --------------------------------------------------------*/
00066 /** @addtogroup CRC_LL_Exported_Functions
00067   * @{
00068   */
00069 
00070 /** @addtogroup CRC_LL_EF_Init
00071   * @{
00072   */
00073 
00074 /**
00075   * @brief  De-initialize CRC registers (Registers restored to their default values).
00076   * @param  CRCx CRC Instance
00077   * @retval An ErrorStatus enumeration value:
00078   *          - SUCCESS: CRC registers are de-initialized
00079   *          - ERROR: CRC registers are not de-initialized
00080   */
00081 ErrorStatus LL_CRC_DeInit(CRC_TypeDef *CRCx)
00082 {
00083   ErrorStatus status = SUCCESS;
00084 
00085   /* Check the parameters */
00086   assert_param(IS_CRC_ALL_INSTANCE(CRCx));
00087 
00088   if (CRCx == CRC)
00089   {
00090     /* Force CRC reset */
00091     LL_AHB1_GRP1_ForceReset(LL_AHB1_GRP1_PERIPH_CRC);
00092 
00093     /* Release CRC reset */
00094     LL_AHB1_GRP1_ReleaseReset(LL_AHB1_GRP1_PERIPH_CRC);
00095   }
00096   else
00097   {
00098     status = ERROR;
00099   }
00100 
00101   return (status);
00102 }
00103 
00104 /**
00105   * @}
00106   */
00107 
00108 /**
00109   * @}
00110   */
00111 
00112 /**
00113   * @}
00114   */
00115 
00116 #endif /* defined (CRC) */
00117 
00118 /**
00119   * @}
00120   */
00121 
00122 #endif /* USE_FULL_LL_DRIVER */
00123 
00124 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
00125