262 lines
6.4 KiB
C
262 lines
6.4 KiB
C
/**
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******************************************************************************
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* @file ft32f0xx_crc.c
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* @author FMD AE
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* @brief This file provides firmware functions to manage the following
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* functionalities of CRC computation unit peripheral:
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* + Configuration of the CRC computation unit
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* + CRC computation of one/many 32-bit data
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* + CRC Independent register (IDR) access
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* @version V1.0.0
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* @data 2021-07-01
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "ft32f0xx_crc.h"
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/**
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* @brief Deinitializes CRC peripheral registers to their default reset values.
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* @param None
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* @retval None
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*/
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void CRC_DeInit(void)
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{
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/* Set DR register to reset value */
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CRC->DR = 0xFFFFFFFF;
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/* Reset IDR register */
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CRC->IDR = 0x00;
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/* Set INIT register to reset value */
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CRC->INIT = 0xFFFFFFFF;
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/* Reset the CRC calculation unit */
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CRC->CR = CRC_CR_RESET;
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}
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/**
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* @brief Resets the CRC calculation unit and sets INIT register content in DR register.
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* @param None
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* @retval None
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*/
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void CRC_ResetDR(void)
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{
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/* Reset CRC generator */
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CRC->CR |= CRC_CR_RESET;
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}
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/**
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* @brief Selects the polynomial size. This function is only applicable for
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* FT32F072 devices.
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* @param CRC_PolSize: Specifies the polynomial size.
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* This parameter can be:
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* @arg CRC_PolSize_7: 7-bit polynomial for CRC calculation
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* @arg CRC_PolSize_8: 8-bit polynomial for CRC calculation
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* @arg CRC_PolSize_16: 16-bit polynomial for CRC calculation
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* @arg CRC_PolSize_32: 32-bit polynomial for CRC calculation
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* @retval None
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*/
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//void CRC_PolynomialSizeSelect(uint32_t CRC_PolSize)
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//{
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// uint32_t tmpcr = 0;
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// /* Check the parameter */
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// assert_param(IS_CRC_POL_SIZE(CRC_PolSize));
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// /* Get CR register value */
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// tmpcr = CRC->CR;
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// /* Reset POL_SIZE bits */
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// tmpcr &= (uint32_t)~((uint32_t)CRC_CR_POLSIZE);
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// /* Set the polynomial size */
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// tmpcr |= (uint32_t)CRC_PolSize;
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// /* Write to CR register */
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// CRC->CR = (uint32_t)tmpcr;
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//}
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/**
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* @brief Selects the reverse operation to be performed on input data.
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* @param CRC_ReverseInputData: Specifies the reverse operation on input data.
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* This parameter can be:
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* @arg CRC_ReverseInputData_No: No reverse operation is performed
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* @arg CRC_ReverseInputData_8bits: reverse operation performed on 8 bits
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* @arg CRC_ReverseInputData_16bits: reverse operation performed on 16 bits
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* @arg CRC_ReverseInputData_32bits: reverse operation performed on 32 bits
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* @retval None
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*/
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void CRC_ReverseInputDataSelect(uint32_t CRC_ReverseInputData)
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{
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uint32_t tmpcr = 0;
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/* Check the parameter */
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assert_param(IS_CRC_REVERSE_INPUT_DATA(CRC_ReverseInputData));
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/* Get CR register value */
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tmpcr = CRC->CR;
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/* Reset REV_IN bits */
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tmpcr &= (uint32_t)~((uint32_t)CRC_CR_REV_IN);
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/* Set the reverse operation */
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tmpcr |= (uint32_t)CRC_ReverseInputData;
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/* Write to CR register */
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CRC->CR = (uint32_t)tmpcr;
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}
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/**
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* @brief Enables or disable the reverse operation on output data.
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* The reverse operation on output data is performed on 32-bit.
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* @param NewState: new state of the reverse operation on output data.
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* This parameter can be: ENABLE or DISABLE.
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* @retval None
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*/
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void CRC_ReverseOutputDataCmd(FunctionalState NewState)
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{
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/* Check the parameters */
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assert_param(IS_FUNCTIONAL_STATE(NewState));
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if (NewState != DISABLE)
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{
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/* Enable reverse operation on output data */
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CRC->CR |= CRC_CR_REV_OUT;
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}
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else
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{
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/* Disable reverse operation on output data */
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CRC->CR &= (uint32_t)~((uint32_t)CRC_CR_REV_OUT);
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}
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}
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/**
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* @brief Initializes the INIT register.
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* @note After resetting CRC calculation unit, CRC_InitValue is stored in DR register
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* @param CRC_InitValue: Programmable initial CRC value
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* @retval None
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*/
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void CRC_SetInitRegister(uint32_t CRC_InitValue)
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{
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CRC->INIT = CRC_InitValue;
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}
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/**
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* @brief Initializes the polynomail coefficients. This function is only
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* applicable for FT32F072 devices.
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* @param CRC_Pol: Polynomial to be used for CRC calculation.
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* @retval None
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*/
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void CRC_SetPolynomial(uint32_t CRC_Pol)
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{
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// CRC->POL = CRC_Pol;
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}
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/**
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* @}
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*/
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/**
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* @brief Computes the 32-bit CRC of a given data word(32-bit).
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* @param CRC_Data: data word(32-bit) to compute its CRC
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* @retval 32-bit CRC
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*/
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uint32_t CRC_CalcCRC(uint32_t CRC_Data)
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{
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CRC->DR = CRC_Data;
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return (CRC->DR);
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}
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/**
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* @brief Computes the 16-bit CRC of a given 16-bit data.
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* @param CRC_Data: data half-word(16-bit) to compute its CRC
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* @retval 16-bit CRC
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*/
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uint32_t CRC_CalcCRC16bits(uint16_t CRC_Data)
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{
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*(uint16_t*)(CRC_BASE) = (uint16_t) CRC_Data;
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return (CRC->DR);
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}
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/**
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* @brief Computes the 8-bit CRC of a given 8-bit data.
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* @param CRC_Data: 8-bit data to compute its CRC
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* @retval 8-bit CRC
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*/
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uint32_t CRC_CalcCRC8bits(uint8_t CRC_Data)
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{
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*(uint8_t*)(CRC_BASE) = (uint8_t) CRC_Data;
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return (CRC->DR);
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}
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/**
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* @brief Computes the 32-bit CRC of a given buffer of data word(32-bit).
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* @param pBuffer: pointer to the buffer containing the data to be computed
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* @param BufferLength: length of the buffer to be computed
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* @retval 32-bit CRC
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*/
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uint32_t CRC_CalcBlockCRC(uint32_t pBuffer[], uint32_t BufferLength)
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{
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uint32_t index = 0;
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for(index = 0; index < BufferLength; index++)
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{
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CRC->DR = pBuffer[index];
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}
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return (CRC->DR);
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}
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/**
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* @brief Returns the current CRC value.
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* @param None
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* @retval 32-bit CRC
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*/
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uint32_t CRC_GetCRC(void)
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{
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return (CRC->DR);
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}
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/**
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* @}
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*/
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/**
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* @brief Stores an 8-bit data in the Independent Data(ID) register.
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* @param CRC_IDValue: 8-bit value to be stored in the ID register
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* @retval None
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*/
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void CRC_SetIDRegister(uint8_t CRC_IDValue)
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{
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CRC->IDR = CRC_IDValue;
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}
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/**
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* @brief Returns the 8-bit data stored in the Independent Data(ID) register
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* @param None
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* @retval 8-bit value of the ID register
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*/
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uint8_t CRC_GetIDRegister(void)
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{
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return (uint8_t)(CRC->IDR);
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT FMD *****END OF FILE****/
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