amiro-blt / Target / Demo / ARMCM4_STM32F405_Power_Management_GCC / Boot / lib / stdperiphlib / STM32F4xx_StdPeriph_Driver / src / stm32f4xx_crc.c @ 69661903
History | View | Annotate | Download (3.513 KB)
| 1 | 69661903 | Thomas Schöpping | /**
|
|---|---|---|---|
| 2 | ******************************************************************************
|
||
| 3 | * @file stm32f4xx_crc.c
|
||
| 4 | * @author MCD Application Team
|
||
| 5 | * @version V1.1.0
|
||
| 6 | * @date 11-January-2013
|
||
| 7 | * @brief This file provides all the CRC firmware functions.
|
||
| 8 | ******************************************************************************
|
||
| 9 | * @attention
|
||
| 10 | *
|
||
| 11 | * <h2><center>© COPYRIGHT 2013 STMicroelectronics</center></h2>
|
||
| 12 | *
|
||
| 13 | * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
|
||
| 14 | * You may not use this file except in compliance with the License.
|
||
| 15 | * You may obtain a copy of the License at:
|
||
| 16 | *
|
||
| 17 | * http://www.st.com/software_license_agreement_liberty_v2
|
||
| 18 | *
|
||
| 19 | * Unless required by applicable law or agreed to in writing, software
|
||
| 20 | * distributed under the License is distributed on an "AS IS" BASIS,
|
||
| 21 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
| 22 | * See the License for the specific language governing permissions and
|
||
| 23 | * limitations under the License.
|
||
| 24 | *
|
||
| 25 | ******************************************************************************
|
||
| 26 | */
|
||
| 27 | |||
| 28 | /* Includes ------------------------------------------------------------------*/
|
||
| 29 | #include "stm32f4xx_crc.h" |
||
| 30 | |||
| 31 | /** @addtogroup STM32F4xx_StdPeriph_Driver
|
||
| 32 | * @{
|
||
| 33 | */
|
||
| 34 | |||
| 35 | /** @defgroup CRC
|
||
| 36 | * @brief CRC driver modules
|
||
| 37 | * @{
|
||
| 38 | */
|
||
| 39 | |||
| 40 | /* Private typedef -----------------------------------------------------------*/
|
||
| 41 | /* Private define ------------------------------------------------------------*/
|
||
| 42 | /* Private macro -------------------------------------------------------------*/
|
||
| 43 | /* Private variables ---------------------------------------------------------*/
|
||
| 44 | /* Private function prototypes -----------------------------------------------*/
|
||
| 45 | /* Private functions ---------------------------------------------------------*/
|
||
| 46 | |||
| 47 | /** @defgroup CRC_Private_Functions
|
||
| 48 | * @{
|
||
| 49 | */
|
||
| 50 | |||
| 51 | /**
|
||
| 52 | * @brief Resets the CRC Data register (DR).
|
||
| 53 | * @param None
|
||
| 54 | * @retval None
|
||
| 55 | */
|
||
| 56 | void CRC_ResetDR(void) |
||
| 57 | {
|
||
| 58 | /* Reset CRC generator */
|
||
| 59 | CRC->CR = CRC_CR_RESET; |
||
| 60 | } |
||
| 61 | |||
| 62 | /**
|
||
| 63 | * @brief Computes the 32-bit CRC of a given data word(32-bit).
|
||
| 64 | * @param Data: data word(32-bit) to compute its CRC
|
||
| 65 | * @retval 32-bit CRC
|
||
| 66 | */
|
||
| 67 | uint32_t CRC_CalcCRC(uint32_t Data) |
||
| 68 | {
|
||
| 69 | CRC->DR = Data; |
||
| 70 | |||
| 71 | return (CRC->DR);
|
||
| 72 | } |
||
| 73 | |||
| 74 | /**
|
||
| 75 | * @brief Computes the 32-bit CRC of a given buffer of data word(32-bit).
|
||
| 76 | * @param pBuffer: pointer to the buffer containing the data to be computed
|
||
| 77 | * @param BufferLength: length of the buffer to be computed
|
||
| 78 | * @retval 32-bit CRC
|
||
| 79 | */
|
||
| 80 | uint32_t CRC_CalcBlockCRC(uint32_t pBuffer[], uint32_t BufferLength) |
||
| 81 | {
|
||
| 82 | uint32_t index = 0;
|
||
| 83 | |||
| 84 | for(index = 0; index < BufferLength; index++) |
||
| 85 | {
|
||
| 86 | CRC->DR = pBuffer[index]; |
||
| 87 | } |
||
| 88 | return (CRC->DR);
|
||
| 89 | } |
||
| 90 | |||
| 91 | /**
|
||
| 92 | * @brief Returns the current CRC value.
|
||
| 93 | * @param None
|
||
| 94 | * @retval 32-bit CRC
|
||
| 95 | */
|
||
| 96 | uint32_t CRC_GetCRC(void)
|
||
| 97 | {
|
||
| 98 | return (CRC->DR);
|
||
| 99 | } |
||
| 100 | |||
| 101 | /**
|
||
| 102 | * @brief Stores a 8-bit data in the Independent Data(ID) register.
|
||
| 103 | * @param IDValue: 8-bit value to be stored in the ID register
|
||
| 104 | * @retval None
|
||
| 105 | */
|
||
| 106 | void CRC_SetIDRegister(uint8_t IDValue)
|
||
| 107 | {
|
||
| 108 | CRC->IDR = IDValue; |
||
| 109 | } |
||
| 110 | |||
| 111 | /**
|
||
| 112 | * @brief Returns the 8-bit data stored in the Independent Data(ID) register
|
||
| 113 | * @param None
|
||
| 114 | * @retval 8-bit value of the ID register
|
||
| 115 | */
|
||
| 116 | uint8_t CRC_GetIDRegister(void)
|
||
| 117 | {
|
||
| 118 | return (CRC->IDR);
|
||
| 119 | } |
||
| 120 | |||
| 121 | /**
|
||
| 122 | * @}
|
||
| 123 | */
|
||
| 124 | |||
| 125 | /**
|
||
| 126 | * @}
|
||
| 127 | */
|
||
| 128 | |||
| 129 | /**
|
||
| 130 | * @}
|
||
| 131 | */
|
||
| 132 | |||
| 133 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|