+++ /dev/null
-/**
- ******************************************************************************
- * @file stm32f0xx_hal_crc.c
- * @author MCD Application Team
- * @version V1.2.0
- * @date 11-December-2014
- * @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 #####
- ===============================================================================
- [..]
- (#) Enable CRC AHB clock using __CRC_CLK_ENABLE();
- (#) Initialize CRC calculator
- (++)specify generating polynomial (IP default or non-default one)
- (++)specify initialization value (IP default or non-default one)
- (++)specify input data format
- (++)specify input or output data inversion mode if any
- (#) Use HAL_CRC_Accumulate() function to compute the CRC value of the
- input data buffer starting with the previously computed CRC as
- initialization value
- (#) Use HAL_CRC_Calculate() function to compute the CRC value of the
- input data buffer starting with the defined initialization value
- (default or non-default) to initiate CRC calculation
-
- @endverbatim
- ******************************************************************************
- * @attention
- *
- * <h2><center>© COPYRIGHT(c) 2014 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 "stm32f0xx_hal.h"
-
-/** @addtogroup STM32F0xx_HAL_Driver
- * @{
- */
-
-/** @defgroup CRC CRC HAL module driver
- * @brief CRC HAL module driver.
- * @{
- */
-
-#ifdef HAL_CRC_MODULE_ENABLED
-
-/* Private typedef -----------------------------------------------------------*/
-/* Private define ------------------------------------------------------------*/
-/* Private macro -------------------------------------------------------------*/
-/* Private variables ---------------------------------------------------------*/
-/* Private function prototypes -----------------------------------------------*/
-/** @defgroup CRC_Private_Functions CRC Private Functions
- * @{
- */
-static uint32_t CRC_Handle_8(CRC_HandleTypeDef *hcrc, uint8_t pBuffer[], uint32_t BufferLength);
-static uint32_t CRC_Handle_16(CRC_HandleTypeDef *hcrc, uint16_t pBuffer[], uint32_t BufferLength);
-/**
- * @}
- */
-
-/* Exported functions ---------------------------------------------------------*/
-/** @defgroup CRC_Exported_Functions CRC Exported Functions
- * @{
- */
-
-/** @defgroup CRC_Exported_Functions_Group1 Initialization/de-initialization functions
- * @brief Initialization and Configuration functions.
- *
-@verbatim
- ===============================================================================
- ##### Initialization and Configuration 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: CRC handle
- * @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)
- {
- /* Init the low level hardware */
- HAL_CRC_MspInit(hcrc);
- }
-
- hcrc->State = HAL_CRC_STATE_BUSY;
-
- /* Extended initialization: if programmable polynomial feature is
- applicable to device, set default or non-default generating
- polynomial according to hcrc->Init parameters.
- If feature is non-applicable to device in use, HAL_CRCEx_Init straight
- away reports HAL_OK. */
- if (HAL_CRCEx_Init(hcrc) != HAL_OK)
- {
- return HAL_ERROR;
- }
-
- /* check whether or not non-default CRC initial value has been
- * picked up by user */
- assert_param(IS_DEFAULT_INIT_VALUE(hcrc->Init.DefaultInitValueUse));
- if (hcrc->Init.DefaultInitValueUse == DEFAULT_INIT_VALUE_ENABLE)
- {
- WRITE_REG(hcrc->Instance->INIT, DEFAULT_CRC_INITVALUE);
- }
- else
- {
- WRITE_REG(hcrc->Instance->INIT, hcrc->Init.InitValue);
- }
-
-
- /* set input data inversion mode */
- assert_param(IS_CRC_INPUTDATA_INVERSION_MODE(hcrc->Init.InputDataInversionMode));
- MODIFY_REG(hcrc->Instance->CR, CRC_CR_REV_IN, hcrc->Init.InputDataInversionMode);
-
- /* set output data inversion mode */
- assert_param(IS_CRC_OUTPUTDATA_INVERSION_MODE(hcrc->Init.OutputDataInversionMode));
- MODIFY_REG(hcrc->Instance->CR, CRC_CR_REV_OUT, hcrc->Init.OutputDataInversionMode);
-
- /* makes sure the input data format (bytes, halfwords or words stream)
- * is properly specified by user */
- assert_param(IS_CRC_INPUTDATA_FORMAT(hcrc->InputDataFormat));
-
- /* Change CRC peripheral state */
- hcrc->State = HAL_CRC_STATE_READY;
-
- /* Return function status */
- return HAL_OK;
-}
-
-/**
- * @brief DeInitializes the CRC peripheral.
- * @param hcrc: CRC handle
- * @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));
-
- /* Check the CRC peripheral state */
- if(hcrc->State == HAL_CRC_STATE_BUSY)
- {
- return HAL_BUSY;
- }
-
- /* 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;
-
- /* Process unlocked */
- __HAL_UNLOCK(hcrc);
-
- /* Return function status */
- return HAL_OK;
-}
-
-/**
- * @brief Initializes the CRC MSP.
- * @param hcrc: CRC handle
- * @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 can be implemented in the user file
- */
-}
-
-/**
- * @brief DeInitializes the CRC MSP.
- * @param hcrc: CRC handle
- * @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 can be implemented in the user file
- */
-}
-
-/**
- * @}
- */
-
-/** @defgroup CRC_Exported_Functions_Group2 Peripheral Control functions
- * @brief management functions.
- *
-@verbatim
- ===============================================================================
- ##### Peripheral Control functions #####
- ===============================================================================
- [..] This section provides functions allowing to:
- (+) Compute the 7, 8, 16 or 32-bit CRC value of an 8, 16 or 32-bit data buffer
- using combination of the previous CRC value and the new one.
-
- or
-
- (+) Compute the 7, 8, 16 or 32-bit CRC value of an 8, 16 or 32-bit data buffer
- independently of the previous CRC value.
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Compute the 7, 8, 16 or 32-bit CRC value of an 8, 16 or 32-bit data buffer
- * starting with the previously computed CRC as initialization value.
- * @param hcrc: CRC handle
- * @param pBuffer: pointer to the input data buffer, exact input data format is
- * provided by hcrc->InputDataFormat.
- * @param BufferLength: input data buffer length
- * @retval uint32_t CRC (returned value LSBs for CRC shorter than 32 bits)
- */
-uint32_t HAL_CRC_Accumulate(CRC_HandleTypeDef *hcrc, uint32_t pBuffer[], uint32_t BufferLength)
-{
- uint32_t index = 0; /* CRC input data buffer index */
- uint32_t temp = 0; /* CRC output (read from hcrc->Instance->DR register) */
-
- /* Process locked */
- __HAL_LOCK(hcrc);
-
- /* Change CRC peripheral state */
- hcrc->State = HAL_CRC_STATE_BUSY;
-
- switch (hcrc->InputDataFormat)
- {
- case CRC_INPUTDATA_FORMAT_WORDS:
- /* Enter Data to the CRC calculator */
- for(index = 0; index < BufferLength; index++)
- {
- hcrc->Instance->DR = pBuffer[index];
- }
- temp = hcrc->Instance->DR;
- break;
-
- case CRC_INPUTDATA_FORMAT_BYTES:
- temp = CRC_Handle_8(hcrc, (uint8_t*)pBuffer, BufferLength);
- break;
-
- case CRC_INPUTDATA_FORMAT_HALFWORDS:
- temp = CRC_Handle_16(hcrc, (uint16_t*)pBuffer, BufferLength);
- break;
-
- default:
- break;
- }
-
- /* Change CRC peripheral state */
- hcrc->State = HAL_CRC_STATE_READY;
-
- /* Process unlocked */
- __HAL_UNLOCK(hcrc);
-
- /* Return the CRC computed value */
- return temp;
-}
-
-
-/**
- * @brief Compute the 7, 8, 16 or 32-bit CRC value of an 8, 16 or 32-bit data buffer
- * starting with hcrc->Instance->INIT as initialization value.
- * @param hcrc: CRC handle
- * @param pBuffer: pointer to the input data buffer, exact input data format is
- * provided by hcrc->InputDataFormat.
- * @param BufferLength: input data buffer length
- * @retval uint32_t CRC (returned value LSBs for CRC shorter than 32 bits)
- */
-uint32_t HAL_CRC_Calculate(CRC_HandleTypeDef *hcrc, uint32_t pBuffer[], uint32_t BufferLength)
-{
- uint32_t index = 0; /* CRC input data buffer index */
- uint32_t temp = 0; /* CRC output (read from hcrc->Instance->DR register) */
-
- /* Process locked */
- __HAL_LOCK(hcrc);
-
- /* Change CRC peripheral state */
- hcrc->State = HAL_CRC_STATE_BUSY;
-
- /* Reset CRC Calculation Unit (hcrc->Instance->INIT is
- * written in hcrc->Instance->DR) */
- __HAL_CRC_DR_RESET(hcrc);
-
- switch (hcrc->InputDataFormat)
- {
- case CRC_INPUTDATA_FORMAT_WORDS:
- /* Enter 32-bit input data to the CRC calculator */
- for(index = 0; index < BufferLength; index++)
- {
- hcrc->Instance->DR = pBuffer[index];
- }
- temp = hcrc->Instance->DR;
- break;
-
- case CRC_INPUTDATA_FORMAT_BYTES:
- /* Specific 8-bit input data handling */
- temp = CRC_Handle_8(hcrc, (uint8_t*)pBuffer, BufferLength);
- break;
-
- case CRC_INPUTDATA_FORMAT_HALFWORDS:
- /* Specific 16-bit input data handling */
- temp = CRC_Handle_16(hcrc, (uint16_t*)pBuffer, BufferLength);
- break;
-
- default:
- break;
- }
-
- /* Change CRC peripheral state */
- hcrc->State = HAL_CRC_STATE_READY;
-
- /* Process unlocked */
- __HAL_UNLOCK(hcrc);
-
- /* Return the CRC computed value */
- return temp;
-}
-/**
- * @}
- */
-
-/** @defgroup CRC_Exported_Functions_Group3 Peripheral State functions
- * @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: CRC handle
- * @retval HAL state
- */
-HAL_CRC_StateTypeDef HAL_CRC_GetState(CRC_HandleTypeDef *hcrc)
-{
- return hcrc->State;
-}
-
-/**
- * @}
- */
-
-/**
- * @}
- */
-
-/** @addtogroup CRC_Private_Functions CRC Private Functions
- * @{
- */
-/**
- * @brief Enter 8-bit input data to the CRC calculator.
- * Specific data handling to optimize processing time.
- * @param hcrc: CRC handle
- * @param pBuffer: pointer to the input data buffer
- * @param BufferLength: input data buffer length
- * @retval uint32_t CRC (returned value LSBs for CRC shorter than 32 bits)
- */
-static uint32_t CRC_Handle_8(CRC_HandleTypeDef *hcrc, uint8_t pBuffer[], uint32_t BufferLength)
-{
- uint32_t i = 0; /* input data buffer index */
-
- /* Processing time optimization: 4 bytes are entered in a row with a single word write,
- * last bytes must be carefully fed to the CRC calculator to ensure a correct type
- * handling by the IP */
- for(i = 0; i < (BufferLength/4); i++)
- {
- hcrc->Instance->DR = ((uint32_t)pBuffer[4*i]<<24) | ((uint32_t)pBuffer[4*i+1]<<16) | ((uint32_t)pBuffer[4*i+2]<<8) | (uint32_t)pBuffer[4*i+3];
- }
- /* last bytes specific handling */
- if ((BufferLength%4) != 0)
- {
- if (BufferLength%4 == 1)
- {
- *(uint8_t*) (&hcrc->Instance->DR) = pBuffer[4*i];
- }
- if (BufferLength%4 == 2)
- {
- *(uint16_t*) (&hcrc->Instance->DR) = ((uint16_t)pBuffer[4*i]<<8) | (uint16_t)pBuffer[4*i+1];
- }
- if (BufferLength%4 == 3)
- {
- *(uint16_t*) (&hcrc->Instance->DR) = ((uint16_t)pBuffer[4*i]<<8) | (uint16_t)pBuffer[4*i+1];
- *(uint8_t*) (&hcrc->Instance->DR) = pBuffer[4*i+2];
- }
- }
-
- /* Return the CRC computed value */
- return hcrc->Instance->DR;
-}
-
-
-
-/**
- * @brief Enter 16-bit input data to the CRC calculator.
- * Specific data handling to optimize processing time.
- * @param hcrc: CRC handle
- * @param pBuffer: pointer to the input data buffer
- * @param BufferLength: input data buffer length
- * @retval uint32_t CRC (returned value LSBs for CRC shorter than 32 bits)
- */
-static uint32_t CRC_Handle_16(CRC_HandleTypeDef *hcrc, uint16_t pBuffer[], uint32_t BufferLength)
-{
- uint32_t i = 0; /* input data buffer index */
-
- /* Processing time optimization: 2 HalfWords are entered in a row with a single word write,
- * in case of odd length, last HalfWord must be carefully fed to the CRC calculator to ensure
- * a correct type handling by the IP */
- for(i = 0; i < (BufferLength/2); i++)
- {
- hcrc->Instance->DR = (pBuffer[2*i]<<16) | pBuffer[2*i+1];
- }
- if ((BufferLength%2) != 0)
- {
- *(uint16_t*) (&hcrc->Instance->DR) = pBuffer[2*i];
- }
-
- /* Return the CRC computed value */
- return hcrc->Instance->DR;
-}
-/**
- * @}
- */
-
-/**
- * @}
- */
-
-#endif /* HAL_CRC_MODULE_ENABLED */
-/**
- * @}
- */
-
-/**
- * @}
- */
-
-/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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