/** * @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 Set the Reverse Input data mode. * @param hcrc: CRC handle * @param InputReverseMode: Input Data inversion mode. * This parameter can be one of the following values: * @arg @ref CRC_INPUTDATA_INVERSION_NONE no change in bit order (default value) * @arg @ref CRC_INPUTDATA_INVERSION_BYTE Byte-wise bit reversal * @arg @ref CRC_INPUTDATA_INVERSION_HALFWORD HalfWord-wise bit reversal * @arg @ref CRC_INPUTDATA_INVERSION_WORD Word-wise bit reversal * @retval HAL status */ HAL_StatusTypeDef HAL_CRCEx_Input_Data_Reverse(CRC_HandleTypeDef *hcrc, uint32_t InputReverseMode) { /* Check the parameters */ assert_param(IS_CRC_INPUTDATA_INVERSION_MODE(InputReverseMode)); /* Change CRC peripheral state */ hcrc->State = HAL_CRC_STATE_BUSY; /* set input data inversion mode */ MODIFY_REG(hcrc->Instance->CR, CRC_CR_REV_IN, InputReverseMode); /* Change CRC peripheral state */ hcrc->State = HAL_CRC_STATE_READY; /* Return function status */ return HAL_OK; }
/** * @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; /* check whether or not non-default generating polynomial has been * picked up by user */ assert_param(IS_DEFAULT_POLYNOMIAL(hcrc->Init.DefaultPolynomialUse)); if (hcrc->Init.DefaultPolynomialUse == DEFAULT_POLYNOMIAL_ENABLE) { /* initialize IP with default generating polynomial */ WRITE_REG(hcrc->Instance->POL, DEFAULT_CRC32_POLY); MODIFY_REG(hcrc->Instance->CR, CRC_CR_POLYSIZE, CRC_POLYLENGTH_32B); } else { /* initialize CRC IP with generating polynomial defined by user */ if (HAL_CRCEx_Polynomial_Set(hcrc, hcrc->Init.GeneratingPolynomial, hcrc->Init.CRCLength) != 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; }