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Diff: targets/cmsis/TARGET_STM/TARGET_STM32F3/stm32f3xx_hal_crc.c
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/cmsis/TARGET_STM/TARGET_STM32F3/stm32f3xx_hal_crc.c Tue Nov 04 09:45:07 2014 +0000 @@ -0,0 +1,502 @@ +/** + ****************************************************************************** + * @file stm32f3xx_hal_crc.c + * @author MCD Application Team + * @version V1.1.0 + * @date 12-Sept-2014 + * @brief CRC HAL module driver. + * + * This file provides firmware functions to manage the following + * functionalities of the 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 "stm32f3xx_hal.h" + +/** @addtogroup STM32F3xx_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 -----------------------------------------------*/ +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 and de-initialization functions + * @brief Initialization and Configuration functions. + * +@verbatim + =============================================================================== + ##### Initialization/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: CRC handle + * @retval HAL status + */ +HAL_StatusTypeDef HAL_CRC_Init(CRC_HandleTypeDef *hcrc) +{ + /* Check the CRC handle allocation */ + if(hcrc == HAL_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; +} + +/** + * @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 == HAL_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; + } + + /* 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; + } + + /* 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; +} + +/** + * @} + */ + +/** + * @} + */ + + +/** @defgroup 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 = (pBuffer[4*i]<<24) | (pBuffer[4*i+1]<<16) | (pBuffer[4*i+2]<<8) | 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) = (pBuffer[4*i]<<8) | pBuffer[4*i+1]; + } + if (BufferLength%4 == 3) + { + *(uint16_t*) (&hcrc->Instance->DR) = (pBuffer[4*i]<<8) | 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****/