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Diffstat (limited to 'Libraries/STM32F0xx_StdPeriph_Driver/src/stm32f0xx_crc.c')
-rw-r--r-- | Libraries/STM32F0xx_StdPeriph_Driver/src/stm32f0xx_crc.c | 361 |
1 files changed, 0 insertions, 361 deletions
diff --git a/Libraries/STM32F0xx_StdPeriph_Driver/src/stm32f0xx_crc.c b/Libraries/STM32F0xx_StdPeriph_Driver/src/stm32f0xx_crc.c deleted file mode 100644 index 05e1bf1..0000000 --- a/Libraries/STM32F0xx_StdPeriph_Driver/src/stm32f0xx_crc.c +++ /dev/null @@ -1,361 +0,0 @@ -/** - ****************************************************************************** - * @file stm32f0xx_crc.c - * @author MCD Application Team - * @version V1.3.0 - * @date 16-January-2014 - * @brief This file provides firmware functions to manage the following - * functionalities of CRC computation unit peripheral: - * + Configuration of the CRC computation unit - * + CRC computation of one/many 32-bit data - * + CRC Independent register (IDR) access - * - * @verbatim - =============================================================================== - ##### How to use this driver ##### - =============================================================================== - [..] - - (+) Enable CRC AHB clock using RCC_AHBPeriphClockCmd(RCC_AHBPeriph_CRC, ENABLE) - function - (+) If required, select the reverse operation on input data - using CRC_ReverseInputDataSelect() - (+) If required, enable the reverse operation on output data - using CRC_ReverseOutputDataCmd(Enable) - (+) use CRC_CalcCRC() function to compute the CRC of a 32-bit data - or use CRC_CalcBlockCRC() function to compute the CRC if a 32-bit - data buffer - (@) To compute the CRC of a new data use CRC_ResetDR() to reset - the CRC computation unit before starting the computation - otherwise you can get wrong CRC values. - - @endverbatim - * - ****************************************************************************** - * @attention - * - * <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2> - * - * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License"); - * You may not use this file except in compliance with the License. - * You may obtain a copy of the License at: - * - * http://www.st.com/software_license_agreement_liberty_v2 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - * - ****************************************************************************** - */ - -/* Includes ------------------------------------------------------------------*/ -#include "stm32f0xx_crc.h" - -/** @addtogroup STM32F0xx_StdPeriph_Driver - * @{ - */ - -/** @defgroup CRC - * @brief CRC driver modules - * @{ - */ - -/* Private typedef -----------------------------------------------------------*/ -/* Private define ------------------------------------------------------------*/ -/* Private macro -------------------------------------------------------------*/ -/* Private variables ---------------------------------------------------------*/ -/* Private function prototypes -----------------------------------------------*/ -/* Private functions ---------------------------------------------------------*/ - -/** @defgroup CRC_Private_Functions - * @{ - */ - -/** @defgroup CRC_Group1 Configuration of the CRC computation unit functions - * @brief Configuration of the CRC computation unit functions - * -@verbatim - =============================================================================== - ##### CRC configuration functions ##### - =============================================================================== - -@endverbatim - * @{ - */ - -/** - * @brief Deinitializes CRC peripheral registers to their default reset values. - * @param None - * @retval None - */ -void CRC_DeInit(void) -{ - /* Set DR register to reset value */ - CRC->DR = 0xFFFFFFFF; - - /* Set the POL register to the reset value: 0x04C11DB7 */ - CRC->POL = 0x04C11DB7; - - /* Reset IDR register */ - CRC->IDR = 0x00; - - /* Set INIT register to reset value */ - CRC->INIT = 0xFFFFFFFF; - - /* Reset the CRC calculation unit */ - CRC->CR = CRC_CR_RESET; -} - -/** - * @brief Resets the CRC calculation unit and sets INIT register content in DR register. - * @param None - * @retval None - */ -void CRC_ResetDR(void) -{ - /* Reset CRC generator */ - CRC->CR |= CRC_CR_RESET; -} - -/** - * @brief Selects the polynomial size. This function is only applicable for - * STM32F072 devices. - * @param CRC_PolSize: Specifies the polynomial size. - * This parameter can be: - * @arg CRC_PolSize_7: 7-bit polynomial for CRC calculation - * @arg CRC_PolSize_8: 8-bit polynomial for CRC calculation - * @arg CRC_PolSize_16: 16-bit polynomial for CRC calculation - * @arg CRC_PolSize_32: 32-bit polynomial for CRC calculation - * @retval None - */ -void CRC_PolynomialSizeSelect(uint32_t CRC_PolSize) -{ - uint32_t tmpcr = 0; - - /* Check the parameter */ - assert_param(IS_CRC_POL_SIZE(CRC_PolSize)); - - /* Get CR register value */ - tmpcr = CRC->CR; - - /* Reset POL_SIZE bits */ - tmpcr &= (uint32_t)~((uint32_t)CRC_CR_POLSIZE); - /* Set the polynomial size */ - tmpcr |= (uint32_t)CRC_PolSize; - - /* Write to CR register */ - CRC->CR = (uint32_t)tmpcr; -} - -/** - * @brief Selects the reverse operation to be performed on input data. - * @param CRC_ReverseInputData: Specifies the reverse operation on input data. - * This parameter can be: - * @arg CRC_ReverseInputData_No: No reverse operation is performed - * @arg CRC_ReverseInputData_8bits: reverse operation performed on 8 bits - * @arg CRC_ReverseInputData_16bits: reverse operation performed on 16 bits - * @arg CRC_ReverseInputData_32bits: reverse operation performed on 32 bits - * @retval None - */ -void CRC_ReverseInputDataSelect(uint32_t CRC_ReverseInputData) -{ - uint32_t tmpcr = 0; - - /* Check the parameter */ - assert_param(IS_CRC_REVERSE_INPUT_DATA(CRC_ReverseInputData)); - - /* Get CR register value */ - tmpcr = CRC->CR; - - /* Reset REV_IN bits */ - tmpcr &= (uint32_t)~((uint32_t)CRC_CR_REV_IN); - /* Set the reverse operation */ - tmpcr |= (uint32_t)CRC_ReverseInputData; - - /* Write to CR register */ - CRC->CR = (uint32_t)tmpcr; -} - -/** - * @brief Enables or disable the reverse operation on output data. - * The reverse operation on output data is performed on 32-bit. - * @param NewState: new state of the reverse operation on output data. - * This parameter can be: ENABLE or DISABLE. - * @retval None - */ -void CRC_ReverseOutputDataCmd(FunctionalState NewState) -{ - /* Check the parameters */ - assert_param(IS_FUNCTIONAL_STATE(NewState)); - - if (NewState != DISABLE) - { - /* Enable reverse operation on output data */ - CRC->CR |= CRC_CR_REV_OUT; - } - else - { - /* Disable reverse operation on output data */ - CRC->CR &= (uint32_t)~((uint32_t)CRC_CR_REV_OUT); - } -} - -/** - * @brief Initializes the INIT register. - * @note After resetting CRC calculation unit, CRC_InitValue is stored in DR register - * @param CRC_InitValue: Programmable initial CRC value - * @retval None - */ -void CRC_SetInitRegister(uint32_t CRC_InitValue) -{ - CRC->INIT = CRC_InitValue; -} - -/** - * @brief Initializes the polynomail coefficients. This function is only - * applicable for STM32F072 devices. - * @param CRC_Pol: Polynomial to be used for CRC calculation. - * @retval None - */ -void CRC_SetPolynomial(uint32_t CRC_Pol) -{ - CRC->POL = CRC_Pol; -} - -/** - * @} - */ - -/** @defgroup CRC_Group2 CRC computation of one/many 32-bit data functions - * @brief CRC computation of one/many 32-bit data functions - * -@verbatim - =============================================================================== - ##### CRC computation functions ##### - =============================================================================== - -@endverbatim - * @{ - */ - -/** - * @brief Computes the 32-bit CRC of a given data word(32-bit). - * @param CRC_Data: data word(32-bit) to compute its CRC - * @retval 32-bit CRC - */ -uint32_t CRC_CalcCRC(uint32_t CRC_Data) -{ - CRC->DR = CRC_Data; - - return (CRC->DR); -} - -/** - * @brief Computes the 16-bit CRC of a given 16-bit data. This function is only - * applicable for STM32F072 devices. - * @param CRC_Data: data half-word(16-bit) to compute its CRC - * @retval 16-bit CRC - */ -uint32_t CRC_CalcCRC16bits(uint16_t CRC_Data) -{ - *(uint16_t*)(CRC_BASE) = (uint16_t) CRC_Data; - - return (CRC->DR); -} - -/** - * @brief Computes the 8-bit CRC of a given 8-bit data. This function is only - * applicable for STM32F072 devices. - * @param CRC_Data: 8-bit data to compute its CRC - * @retval 8-bit CRC - */ -uint32_t CRC_CalcCRC8bits(uint8_t CRC_Data) -{ - *(uint8_t*)(CRC_BASE) = (uint8_t) CRC_Data; - - return (CRC->DR); -} - -/** - * @brief Computes the 32-bit CRC of a given buffer of data word(32-bit). - * @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 CRC_CalcBlockCRC(uint32_t pBuffer[], uint32_t BufferLength) -{ - uint32_t index = 0; - - for(index = 0; index < BufferLength; index++) - { - CRC->DR = pBuffer[index]; - } - return (CRC->DR); -} - -/** - * @brief Returns the current CRC value. - * @param None - * @retval 32-bit CRC - */ -uint32_t CRC_GetCRC(void) -{ - return (CRC->DR); -} - -/** - * @} - */ - -/** @defgroup CRC_Group3 CRC Independent Register (IDR) access functions - * @brief CRC Independent Register (IDR) access (write/read) functions - * -@verbatim - =============================================================================== - ##### CRC Independent Register (IDR) access functions ##### - =============================================================================== - -@endverbatim - * @{ - */ - -/** - * @brief Stores an 8-bit data in the Independent Data(ID) register. - * @param CRC_IDValue: 8-bit value to be stored in the ID register - * @retval None - */ -void CRC_SetIDRegister(uint8_t CRC_IDValue) -{ - CRC->IDR = CRC_IDValue; -} - -/** - * @brief Returns the 8-bit data stored in the Independent Data(ID) register - * @param None - * @retval 8-bit value of the ID register - */ -uint8_t CRC_GetIDRegister(void) -{ - return (CRC->IDR); -} - -/** - * @} - */ - -/** - * @} - */ - -/** - * @} - */ - -/** - * @} - */ - -/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |