STM32F439xx HAL User Manual
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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>© 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