diff options
Diffstat (limited to 'Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_hal_crc_ex.c')
| -rw-r--r-- | Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_hal_crc_ex.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_hal_crc_ex.c b/Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_hal_crc_ex.c new file mode 100644 index 0000000..5c4c478 --- /dev/null +++ b/Drivers/STM32H7xx_HAL_Driver/Src/stm32h7xx_hal_crc_ex.c @@ -0,0 +1,232 @@ +/**
+ ******************************************************************************
+ * @file stm32h7xx_hal_crc_ex.c
+ * @author MCD Application Team
+ * @brief Extended CRC HAL module driver.
+ * This file provides firmware functions to manage the extended
+ * functionalities of the CRC peripheral.
+ *
+ ******************************************************************************
+ * @attention
+ *
+ * Copyright (c) 2017 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software is licensed under terms that can be found in the LICENSE file
+ * in the root directory of this software component.
+ * If no LICENSE file comes with this software, it is provided AS-IS.
+ *
+ ******************************************************************************
+ @verbatim
+================================================================================
+ ##### How to use this driver #####
+================================================================================
+ [..]
+ (+) Set user-defined generating polynomial through HAL_CRCEx_Polynomial_Set()
+ (+) Configure Input or Output data inversion
+
+ @endverbatim
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32h7xx_hal.h"
+
+/** @addtogroup STM32H7xx_HAL_Driver
+ * @{
+ */
+
+/** @defgroup CRCEx CRCEx
+ * @brief CRC Extended HAL module driver
+ * @{
+ */
+
+#ifdef HAL_CRC_MODULE_ENABLED
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Exported functions --------------------------------------------------------*/
+
+/** @defgroup CRCEx_Exported_Functions CRC Extended Exported Functions
+ * @{
+ */
+
+/** @defgroup CRCEx_Exported_Functions_Group1 Extended Initialization/de-initialization functions
+ * @brief Extended Initialization and Configuration functions.
+ *
+@verbatim
+ ===============================================================================
+ ##### Extended configuration functions #####
+ ===============================================================================
+ [..] This section provides functions allowing to:
+ (+) Configure the generating polynomial
+ (+) Configure the input data inversion
+ (+) Configure the output data inversion
+
+@endverbatim
+ * @{
+ */
+
+
+/**
+ * @brief Initialize the CRC polynomial if different from default one.
+ * @param hcrc CRC handle
+ * @param Pol CRC generating polynomial (7, 8, 16 or 32-bit long).
+ * This parameter is written in normal representation, e.g.
+ * @arg for a polynomial of degree 7, X^7 + X^6 + X^5 + X^2 + 1 is written 0x65
+ * @arg for a polynomial of degree 16, X^16 + X^12 + X^5 + 1 is written 0x1021
+ * @param PolyLength CRC polynomial length.
+ * This parameter can be one of the following values:
+ * @arg @ref CRC_POLYLENGTH_7B 7-bit long CRC (generating polynomial of degree 7)
+ * @arg @ref CRC_POLYLENGTH_8B 8-bit long CRC (generating polynomial of degree 8)
+ * @arg @ref CRC_POLYLENGTH_16B 16-bit long CRC (generating polynomial of degree 16)
+ * @arg @ref CRC_POLYLENGTH_32B 32-bit long CRC (generating polynomial of degree 32)
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_CRCEx_Polynomial_Set(CRC_HandleTypeDef *hcrc, uint32_t Pol, uint32_t PolyLength)
+{
+ HAL_StatusTypeDef status = HAL_OK;
+ uint32_t msb = 31U; /* polynomial degree is 32 at most, so msb is initialized to max value */
+
+ /* Check the parameters */
+ assert_param(IS_CRC_POL_LENGTH(PolyLength));
+
+ /* Ensure that the generating polynomial is odd */
+ if ((Pol & (uint32_t)(0x1U)) == 0U)
+ {
+ status = HAL_ERROR;
+ }
+ else
+ {
+ /* check polynomial definition vs polynomial size:
+ * polynomial length must be aligned with polynomial
+ * definition. HAL_ERROR is reported if Pol degree is
+ * larger than that indicated by PolyLength.
+ * Look for MSB position: msb will contain the degree of
+ * the second to the largest polynomial member. E.g., for
+ * X^7 + X^6 + X^5 + X^2 + 1, msb = 6. */
+ while ((msb-- > 0U) && ((Pol & ((uint32_t)(0x1U) << (msb & 0x1FU))) == 0U))
+ {
+ }
+
+ switch (PolyLength)
+ {
+
+ case CRC_POLYLENGTH_7B:
+ if (msb >= HAL_CRC_LENGTH_7B)
+ {
+ status = HAL_ERROR;
+ }
+ break;
+ case CRC_POLYLENGTH_8B:
+ if (msb >= HAL_CRC_LENGTH_8B)
+ {
+ status = HAL_ERROR;
+ }
+ break;
+ case CRC_POLYLENGTH_16B:
+ if (msb >= HAL_CRC_LENGTH_16B)
+ {
+ status = HAL_ERROR;
+ }
+ break;
+
+ case CRC_POLYLENGTH_32B:
+ /* no polynomial definition vs. polynomial length issue possible */
+ break;
+ default:
+ status = HAL_ERROR;
+ break;
+ }
+ }
+ if (status == HAL_OK)
+ {
+ /* set generating polynomial */
+ WRITE_REG(hcrc->Instance->POL, Pol);
+
+ /* set generating polynomial size */
+ MODIFY_REG(hcrc->Instance->CR, CRC_CR_POLYSIZE, PolyLength);
+ }
+ /* Return function status */
+ return status;
+}
+
+/**
+ * @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 Set the Reverse Output data mode.
+ * @param hcrc CRC handle
+ * @param OutputReverseMode Output Data inversion mode.
+ * This parameter can be one of the following values:
+ * @arg @ref CRC_OUTPUTDATA_INVERSION_DISABLE no CRC inversion (default value)
+ * @arg @ref CRC_OUTPUTDATA_INVERSION_ENABLE bit-level inversion (e.g. for a 8-bit CRC: 0xB5 becomes 0xAD)
+ * @retval HAL status
+ */
+HAL_StatusTypeDef HAL_CRCEx_Output_Data_Reverse(CRC_HandleTypeDef *hcrc, uint32_t OutputReverseMode)
+{
+ /* Check the parameters */
+ assert_param(IS_CRC_OUTPUTDATA_INVERSION_MODE(OutputReverseMode));
+
+ /* Change CRC peripheral state */
+ hcrc->State = HAL_CRC_STATE_BUSY;
+
+ /* set output data inversion mode */
+ MODIFY_REG(hcrc->Instance->CR, CRC_CR_REV_OUT, OutputReverseMode);
+
+ /* Change CRC peripheral state */
+ hcrc->State = HAL_CRC_STATE_READY;
+
+ /* Return function status */
+ return HAL_OK;
+}
+
+
+
+
+/**
+ * @}
+ */
+
+
+/**
+ * @}
+ */
+
+
+#endif /* HAL_CRC_MODULE_ENABLED */
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
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