text: /**
    ******************************************************************************
    * @file    stm32f7xx_hal_usart_ex.h
    * @author  MCD Application Team
    * @version V1.0.1
    * @date    25-June-2015
    * @brief   Header file of USART HAL Extension module.
    ******************************************************************************
    * @attention
    *
    * <h2><center>&copy; COPYRIGHT(c) 2015 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.
    *
    ******************************************************************************
    */
  
  /* Define to prevent recursive inclusion -------------------------------------*/
  #ifndef __STM32F7xx_HAL_USART_EX_H
  #define __STM32F7xx_HAL_USART_EX_H
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32f7xx_hal_def.h"
  
  /** @addtogroup STM32F7xx_HAL_Driver
    * @{
    */
  
  /** @addtogroup USARTEx
    * @{
    */
  
  /* Exported types ------------------------------------------------------------*/
  /* Exported constants --------------------------------------------------------*/
  /** @defgroup USARTEx_Exported_Constants USARTEx Exported Constants
    * @{
    */
  
  /** @defgroup USARTEx_Word_Length USARTEx Word Length
    * @{
    */
  #define USART_WORDLENGTH_7B                  ((uint32_t)USART_CR1_M_1)
  #define USART_WORDLENGTH_8B                  ((uint32_t)0x00000000)
  #define USART_WORDLENGTH_9B                  ((uint32_t)USART_CR1_M_0)
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /* Exported functions --------------------------------------------------------*/
  
  /* Private macros ------------------------------------------------------------*/
  /** @defgroup USARTEx_Private_Macros USARTEx Private Macros
    * @{
    */
  
  /** @brief  Computes the USART mask to apply to retrieve the received data
    *         according to the word length and to the parity bits activation.
    *         If PCE = 1, the parity bit is not included in the data extracted
    *         by the reception API().
    *         This masking operation is not carried out in the case of
    *         DMA transfers.
    * @param  __HANDLE__: specifies the USART Handle
    * @retval none
    */
  #define __HAL_USART_MASK_COMPUTATION(__HANDLE__)                      \
    do {                                                                \
    if ((__HANDLE__)->Init.WordLength == USART_WORDLENGTH_9B)           \
    {                                                                   \
       if ((__HANDLE__)->Init.Parity == USART_PARITY_NONE)              \
       {                                                                \
          (__HANDLE__)->Mask = 0x01FF ;                                 \
       }                                                                \
       else                                                             \
       {                                                                \
          (__HANDLE__)->Mask = 0x00FF ;                                 \
       }                                                                \
    }                                                                   \
    else if ((__HANDLE__)->Init.WordLength == USART_WORDLENGTH_8B)      \
    {                                                                   \
       if ((__HANDLE__)->Init.Parity == USART_PARITY_NONE)              \
       {                                                                \
          (__HANDLE__)->Mask = 0x00FF ;                                 \
       }                                                                \
       else                                                             \
       {                                                                \
          (__HANDLE__)->Mask = 0x007F ;                                 \
       }                                                                \
    }                                                                   \
    else if ((__HANDLE__)->Init.WordLength == USART_WORDLENGTH_7B)      \
    {                                                                   \
       if ((__HANDLE__)->Init.Parity == USART_PARITY_NONE)              \
       {                                                                \
          (__HANDLE__)->Mask = 0x007F ;                                 \
       }                                                                \
       else                                                             \
       {                                                                \
          (__HANDLE__)->Mask = 0x003F ;                                 \
       }                                                                \
    }                                                                   \
  } while(0)
  
  #define IS_USART_WORD_LENGTH(__LENGTH__) (((__LENGTH__) == USART_WORDLENGTH_7B) || \
                                            ((__LENGTH__) == USART_WORDLENGTH_8B) || \
                                            ((__LENGTH__) == USART_WORDLENGTH_9B))
  /**
    * @}
    */
  
  /* Exported functions --------------------------------------------------------*/
  /* Initialization/de-initialization methods  **********************************/
  /* IO operation methods *******************************************************/
  /* Peripheral Control methods  ************************************************/
  /* Peripheral State methods  **************************************************/
  
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* __STM32F7xx_HAL_USART_EX_H */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  