diff options
Diffstat (limited to 'Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_crc.c')
| -rw-r--r-- | Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_crc.c | 342 |
1 files changed, 342 insertions, 0 deletions
diff --git a/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_crc.c b/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_crc.c new file mode 100644 index 0000000..77ccc89 --- /dev/null +++ b/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_crc.c @@ -0,0 +1,342 @@ +/**
+ ******************************************************************************
+ * @file stm32f4xx_hal_crc.c
+ * @author MCD Application Team
+ * @version V1.3.2
+ * @date 26-June-2015
+ * @brief CRC HAL module driver.
+ * This file provides firmware functions to manage the following
+ * functionalities of the Cyclic Redundancy Check (CRC) peripheral:
+ * + Initialization and de-initialization functions
+ * + Peripheral Control functions
+ * + Peripheral State functions
+ *
+ @verbatim
+ ==============================================================================
+ ##### How to use this driver #####
+ ==============================================================================
+ [..]
+ The CRC HAL driver can be used as follows:
+
+ (#) Enable CRC AHB clock using __HAL_RCC_CRC_CLK_ENABLE();
+
+ (#) Use HAL_CRC_Accumulate() function to compute the CRC value of
+ a 32-bit data buffer using combination of the previous CRC value
+ and the new one.
+
+ (#) Use HAL_CRC_Calculate() function to compute the CRC Value of
+ a new 32-bit data buffer. This function resets the CRC computation
+ unit before starting the computation to avoid getting wrong CRC values.
+
+ @endverbatim
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f4xx_hal.h"
+
+/** @addtogroup STM32F4xx_HAL_Driver
+ * @{
+ */
+
+/** @addtogroup CRC
+ * @{
+ */
+
+#ifdef HAL_CRC_MODULE_ENABLED
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+/* Exported functions --------------------------------------------------------*/
+
+/** @addtogroup CRC_Exported_Functions
+ * @{
+ */
+
+/** @addtogroup CRC_Exported_Functions_Group1
+ * @brief Initialization and de-initialization functions
+ *
+@verbatim
+ ==============================================================================
+ ##### Initialization and de-initialization functions #####
+ ==============================================================================
+ [..] This section provides functions allowing to:
+ (+) Initialize the CRC according to the specified parameters
+ in the CRC_InitTypeDef and create the associated handle
+ (+) DeInitialize the CRC peripheral
+ (+) Initialize the CRC MSP
+ (+) DeInitialize CRC MSP
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Initializes the CRC according to the specified
+ * parameters in the CRC_InitTypeDef and creates the associated handle.
+ * @param hcrc: pointer to a CRC_HandleTypeDef structure that contains
+ * the configuration information for CRC
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_CRC_Init(CRC_HandleTypeDef *hcrc)
+{
+ /* Check the CRC handle allocation */
+ if(hcrc == NULL)
+ {
+ return HAL_ERROR;
+ }
+
+ /* Check the parameters */
+ assert_param(IS_CRC_ALL_INSTANCE(hcrc->Instance));
+
+ if(hcrc->State == HAL_CRC_STATE_RESET)
+ {
+ /* Allocate lock resource and initialize it */
+ hcrc->Lock = HAL_UNLOCKED;
+ /* Init the low level hardware */
+ HAL_CRC_MspInit(hcrc);
+ }
+
+ /* Change CRC peripheral state */
+ hcrc->State = HAL_CRC_STATE_BUSY;
+
+ /* Change CRC peripheral state */
+ hcrc->State = HAL_CRC_STATE_READY;
+
+ /* Return function status */
+ return HAL_OK;
+}
+
+/**
+ * @brief DeInitializes the CRC peripheral.
+ * @param hcrc: pointer to a CRC_HandleTypeDef structure that contains
+ * the configuration information for CRC
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_CRC_DeInit(CRC_HandleTypeDef *hcrc)
+{
+ /* Check the CRC handle allocation */
+ if(hcrc == NULL)
+ {
+ return HAL_ERROR;
+ }
+
+ /* Check the parameters */
+ assert_param(IS_CRC_ALL_INSTANCE(hcrc->Instance));
+
+ /* Change CRC peripheral state */
+ hcrc->State = HAL_CRC_STATE_BUSY;
+
+ /* DeInit the low level hardware */
+ HAL_CRC_MspDeInit(hcrc);
+
+ /* Change CRC peripheral state */
+ hcrc->State = HAL_CRC_STATE_RESET;
+
+ /* Release Lock */
+ __HAL_UNLOCK(hcrc);
+
+ /* Return function status */
+ return HAL_OK;
+}
+
+/**
+ * @brief Initializes the CRC MSP.
+ * @param hcrc: pointer to a CRC_HandleTypeDef structure that contains
+ * the configuration information for CRC
+ * @retval None
+ */
+__weak void HAL_CRC_MspInit(CRC_HandleTypeDef *hcrc)
+{
+ /* NOTE : This function Should not be modified, when the callback is needed,
+ the HAL_CRC_MspInit could be implemented in the user file
+ */
+}
+
+/**
+ * @brief DeInitializes the CRC MSP.
+ * @param hcrc: pointer to a CRC_HandleTypeDef structure that contains
+ * the configuration information for CRC
+ * @retval None
+ */
+__weak void HAL_CRC_MspDeInit(CRC_HandleTypeDef *hcrc)
+{
+ /* NOTE : This function Should not be modified, when the callback is needed,
+ the HAL_CRC_MspDeInit could be implemented in the user file
+ */
+}
+
+/**
+ * @}
+ */
+
+/** @addtogroup CRC_Exported_Functions_Group2
+ * @brief Peripheral Control functions
+ *
+@verbatim
+ ==============================================================================
+ ##### Peripheral Control functions #####
+ ==============================================================================
+ [..] This section provides functions allowing to:
+ (+) Compute the 32-bit CRC value of 32-bit data buffer,
+ using combination of the previous CRC value and the new one.
+ (+) Compute the 32-bit CRC value of 32-bit data buffer,
+ independently of the previous CRC value.
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Computes the 32-bit CRC of 32-bit data buffer using combination
+ * of the previous CRC value and the new one.
+ * @param hcrc: pointer to a CRC_HandleTypeDef structure that contains
+ * the configuration information for CRC
+ * @param pBuffer: pointer to the buffer containing the data to be computed
+ * @param BufferLength: length of the buffer to be computed
+ * @retval 32-bit CRC
+ */
+uint32_t HAL_CRC_Accumulate(CRC_HandleTypeDef *hcrc, uint32_t pBuffer[], uint32_t BufferLength)
+{
+ uint32_t index = 0;
+
+ /* Process Locked */
+ __HAL_LOCK(hcrc);
+
+ /* Change CRC peripheral state */
+ hcrc->State = HAL_CRC_STATE_BUSY;
+
+ /* Enter Data to the CRC calculator */
+ for(index = 0; index < BufferLength; index++)
+ {
+ hcrc->Instance->DR = pBuffer[index];
+ }
+
+ /* Change CRC peripheral state */
+ hcrc->State = HAL_CRC_STATE_READY;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(hcrc);
+
+ /* Return the CRC computed value */
+ return hcrc->Instance->DR;
+}
+
+/**
+ * @brief Computes the 32-bit CRC of 32-bit data buffer independently
+ * of the previous CRC value.
+ * @param hcrc: pointer to a CRC_HandleTypeDef structure that contains
+ * the configuration information for CRC
+ * @param pBuffer: Pointer to the buffer containing the data to be computed
+ * @param BufferLength: Length of the buffer to be computed
+ * @retval 32-bit CRC
+ */
+uint32_t HAL_CRC_Calculate(CRC_HandleTypeDef *hcrc, uint32_t pBuffer[], uint32_t BufferLength)
+{
+ uint32_t index = 0;
+
+ /* Process Locked */
+ __HAL_LOCK(hcrc);
+
+ /* Change CRC peripheral state */
+ hcrc->State = HAL_CRC_STATE_BUSY;
+
+ /* Reset CRC Calculation Unit */
+ __HAL_CRC_DR_RESET(hcrc);
+
+ /* Enter Data to the CRC calculator */
+ for(index = 0; index < BufferLength; index++)
+ {
+ hcrc->Instance->DR = pBuffer[index];
+ }
+
+ /* Change CRC peripheral state */
+ hcrc->State = HAL_CRC_STATE_READY;
+
+ /* Process Unlocked */
+ __HAL_UNLOCK(hcrc);
+
+ /* Return the CRC computed value */
+ return hcrc->Instance->DR;
+}
+
+/**
+ * @}
+ */
+
+
+/** @addtogroup CRC_Exported_Functions_Group3
+ * @brief Peripheral State functions
+ *
+@verbatim
+ ==============================================================================
+ ##### Peripheral State functions #####
+ ==============================================================================
+ [..]
+ This subsection permits to get in run-time the status of the peripheral
+ and the data flow.
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Returns the CRC state.
+ * @param hcrc: pointer to a CRC_HandleTypeDef structure that contains
+ * the configuration information for CRC
+ * @retval HAL state
+ */
+HAL_CRC_StateTypeDef HAL_CRC_GetState(CRC_HandleTypeDef *hcrc)
+{
+ return hcrc->State;
+}
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+#endif /* HAL_CRC_MODULE_ENABLED */
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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