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| 2 | mjames | 1 | /** |
| 2 | ****************************************************************************** |
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| 3 | * @file stm32f1xx_ll_crc.c |
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| 4 | * @author MCD Application Team |
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| 5 | * @brief CRC LL module driver. |
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| 6 | ****************************************************************************** |
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| 7 | * @attention |
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| 8 | * |
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| 9 | * <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2> |
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| 10 | * |
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| 11 | * Redistribution and use in source and binary forms, with or without modification, |
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| 12 | * are permitted provided that the following conditions are met: |
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| 13 | * 1. Redistributions of source code must retain the above copyright notice, |
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| 14 | * this list of conditions and the following disclaimer. |
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
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| 16 | * this list of conditions and the following disclaimer in the documentation |
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| 17 | * and/or other materials provided with the distribution. |
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| 18 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
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| 19 | * may be used to endorse or promote products derived from this software |
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| 20 | * without specific prior written permission. |
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| 21 | * |
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| 22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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| 23 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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| 25 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
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| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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| 28 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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| 29 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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| 30 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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| 31 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 32 | * |
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| 33 | ****************************************************************************** |
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| 34 | */ |
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| 35 | #if defined(USE_FULL_LL_DRIVER) |
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| 36 | |||
| 37 | /* Includes ------------------------------------------------------------------*/ |
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| 38 | #include "stm32f1xx_ll_crc.h" |
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| 39 | #include "stm32f1xx_ll_bus.h" |
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| 40 | |||
| 41 | #ifdef USE_FULL_ASSERT |
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| 42 | #include "stm32_assert.h" |
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| 43 | #else |
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| 44 | #define assert_param(expr) ((void)0U) |
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| 45 | #endif |
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| 46 | |||
| 47 | /** @addtogroup STM32F1xx_LL_Driver |
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| 48 | * @{ |
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| 49 | */ |
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| 50 | |||
| 51 | #if defined (CRC) |
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| 52 | |||
| 53 | /** @addtogroup CRC_LL |
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| 54 | * @{ |
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| 55 | */ |
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| 56 | |||
| 57 | /* Private types -------------------------------------------------------------*/ |
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| 58 | /* Private variables ---------------------------------------------------------*/ |
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| 59 | /* Private constants ---------------------------------------------------------*/ |
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| 60 | /* Private macros ------------------------------------------------------------*/ |
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| 61 | /* Private function prototypes -----------------------------------------------*/ |
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| 62 | |||
| 63 | /* Exported functions --------------------------------------------------------*/ |
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| 64 | /** @addtogroup CRC_LL_Exported_Functions |
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| 65 | * @{ |
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| 66 | */ |
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| 67 | |||
| 68 | /** @addtogroup CRC_LL_EF_Init |
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| 69 | * @{ |
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| 70 | */ |
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| 71 | |||
| 72 | /** |
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| 73 | * @brief De-initialize CRC registers (Registers restored to their default values). |
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| 74 | * @param CRCx CRC Instance |
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| 75 | * @retval An ErrorStatus enumeration value: |
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| 76 | * - SUCCESS: CRC registers are de-initialized |
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| 77 | * - ERROR: CRC registers are not de-initialized |
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| 78 | */ |
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| 79 | ErrorStatus LL_CRC_DeInit(CRC_TypeDef *CRCx) |
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| 80 | { |
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| 81 | ErrorStatus status = SUCCESS; |
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| 82 | |||
| 83 | /* Check the parameters */ |
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| 84 | assert_param(IS_CRC_ALL_INSTANCE(CRCx)); |
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| 85 | |||
| 86 | if (CRCx == CRC) |
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| 87 | { |
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| 88 | |||
| 89 | /* Reset the CRC calculation unit */ |
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| 90 | LL_CRC_ResetCRCCalculationUnit(CRCx); |
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| 91 | |||
| 92 | /* Reset IDR register */ |
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| 93 | LL_CRC_Write_IDR(CRCx, 0x00U); |
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| 94 | } |
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| 95 | else |
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| 96 | { |
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| 97 | status = ERROR; |
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| 98 | } |
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| 99 | |||
| 100 | return (status); |
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| 101 | } |
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| 102 | |||
| 103 | /** |
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| 104 | * @} |
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| 105 | */ |
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| 106 | |||
| 107 | /** |
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| 108 | * @} |
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| 109 | */ |
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| 110 | |||
| 111 | /** |
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| 112 | * @} |
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| 113 | */ |
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| 114 | |||
| 115 | #endif /* defined (CRC) */ |
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| 116 | |||
| 117 | /** |
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| 118 | * @} |
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| 119 | */ |
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| 120 | |||
| 121 | #endif /* USE_FULL_LL_DRIVER */ |
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| 122 | |||
| 123 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |
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| 124 |