text: /**
    ******************************************************************************
    * @file    stm32f1xx_hal_i2c.h
    * @author  MCD Application Team
    * @brief   Header file of I2C HAL module.
    ******************************************************************************
    * @attention
    *
    * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
    * All rights reserved.</center></h2>
    *
    * This software component is licensed by ST under BSD 3-Clause license,
    * the "License"; You may not use this file except in compliance with the
    * License. You may obtain a copy of the License at:
    *                        opensource.org/licenses/BSD-3-Clause
    *
    ******************************************************************************
    */
  
  /* Define to prevent recursive inclusion -------------------------------------*/
  #ifndef __STM32F1xx_HAL_I2C_H
  #define __STM32F1xx_HAL_I2C_H
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32f1xx_hal_def.h"
  
  /** @addtogroup STM32F1xx_HAL_Driver
    * @{
    */
  
  /** @addtogroup I2C
    * @{
    */
  
  /* Exported types ------------------------------------------------------------*/
  /** @defgroup I2C_Exported_Types I2C Exported Types
    * @{
    */
  
  /** @defgroup I2C_Configuration_Structure_definition I2C Configuration Structure definition
    * @brief  I2C Configuration Structure definition
    * @{
    */
  typedef struct
  {
    uint32_t ClockSpeed;       /*!< Specifies the clock frequency.
                                    This parameter must be set to a value lower than 400kHz */
  
    uint32_t DutyCycle;        /*!< Specifies the I2C fast mode duty cycle.
                                    This parameter can be a value of @ref I2C_duty_cycle_in_fast_mode */
  
    uint32_t OwnAddress1;      /*!< Specifies the first device own address.
                                    This parameter can be a 7-bit or 10-bit address. */
  
    uint32_t AddressingMode;   /*!< Specifies if 7-bit or 10-bit addressing mode is selected.
                                    This parameter can be a value of @ref I2C_addressing_mode */
  
    uint32_t DualAddressMode;  /*!< Specifies if dual addressing mode is selected.
                                    This parameter can be a value of @ref I2C_dual_addressing_mode */
  
    uint32_t OwnAddress2;      /*!< Specifies the second device own address if dual addressing mode is selected
                                    This parameter can be a 7-bit address. */
  
    uint32_t GeneralCallMode;  /*!< Specifies if general call mode is selected.
                                    This parameter can be a value of @ref I2C_general_call_addressing_mode */
  
    uint32_t NoStretchMode;    /*!< Specifies if nostretch mode is selected.
                                    This parameter can be a value of @ref I2C_nostretch_mode */
  
  } I2C_InitTypeDef;
  
  /**
    * @}
    */
  
  /** @defgroup HAL_state_structure_definition HAL state structure definition
    * @brief  HAL State structure definition
    * @note  HAL I2C State value coding follow below described bitmap :
    *          b7-b6  Error information
    *             00 : No Error
    *             01 : Abort (Abort user request on going)
    *             10 : Timeout
    *             11 : Error
    *          b5     Peripheral initilisation status
    *             0  : Reset (Peripheral not initialized)
    *             1  : Init done (Peripheral initialized and ready to use. HAL I2C Init function called)
    *          b4     (not used)
    *             x  : Should be set to 0
    *          b3
    *             0  : Ready or Busy (No Listen mode ongoing)
    *             1  : Listen (Peripheral in Address Listen Mode)
    *          b2     Intrinsic process state
    *             0  : Ready
    *             1  : Busy (Peripheral busy with some configuration or internal operations)
    *          b1     Rx state
    *             0  : Ready (no Rx operation ongoing)
    *             1  : Busy (Rx operation ongoing)
    *          b0     Tx state
    *             0  : Ready (no Tx operation ongoing)
    *             1  : Busy (Tx operation ongoing)
    * @{
    */
  typedef enum
  {
    HAL_I2C_STATE_RESET             = 0x00U,   /*!< Peripheral is not yet Initialized         */
    HAL_I2C_STATE_READY             = 0x20U,   /*!< Peripheral Initialized and ready for use  */
    HAL_I2C_STATE_BUSY              = 0x24U,   /*!< An internal process is ongoing            */
    HAL_I2C_STATE_BUSY_TX           = 0x21U,   /*!< Data Transmission process is ongoing      */
    HAL_I2C_STATE_BUSY_RX           = 0x22U,   /*!< Data Reception process is ongoing         */
    HAL_I2C_STATE_LISTEN            = 0x28U,   /*!< Address Listen Mode is ongoing            */
    HAL_I2C_STATE_BUSY_TX_LISTEN    = 0x29U,   /*!< Address Listen Mode and Data Transmission
                                                   process is ongoing                         */
    HAL_I2C_STATE_BUSY_RX_LISTEN    = 0x2AU,   /*!< Address Listen Mode and Data Reception
                                                   process is ongoing                         */
    HAL_I2C_STATE_ABORT             = 0x60U,   /*!< Abort user request ongoing                */
    HAL_I2C_STATE_TIMEOUT           = 0xA0U,   /*!< Timeout state                             */
    HAL_I2C_STATE_ERROR             = 0xE0U    /*!< Error                                     */
  
  } HAL_I2C_StateTypeDef;
  
  /**
    * @}
    */
  
  /** @defgroup HAL_mode_structure_definition HAL mode structure definition
    * @brief  HAL Mode structure definition
    * @note  HAL I2C Mode value coding follow below described bitmap :\n
    *          b7     (not used)\n
    *             x  : Should be set to 0\n
    *          b6\n
    *             0  : None\n
    *             1  : Memory (HAL I2C communication is in Memory Mode)\n
    *          b5\n
    *             0  : None\n
    *             1  : Slave (HAL I2C communication is in Slave Mode)\n
    *          b4\n
    *             0  : None\n
    *             1  : Master (HAL I2C communication is in Master Mode)\n
    *          b3-b2-b1-b0  (not used)\n
    *             xxxx : Should be set to 0000
    * @{
    */
  typedef enum
  {
    HAL_I2C_MODE_NONE               = 0x00U,   /*!< No I2C communication on going             */
    HAL_I2C_MODE_MASTER             = 0x10U,   /*!< I2C communication is in Master Mode       */
    HAL_I2C_MODE_SLAVE              = 0x20U,   /*!< I2C communication is in Slave Mode        */
    HAL_I2C_MODE_MEM                = 0x40U    /*!< I2C communication is in Memory Mode       */
  
  } HAL_I2C_ModeTypeDef;
  
  /**
    * @}
    */
  
  /** @defgroup I2C_Error_Code_definition I2C Error Code definition
    * @brief  I2C Error Code definition
    * @{
    */
  #define HAL_I2C_ERROR_NONE              0x00000000U    /*!< No error              */
  #define HAL_I2C_ERROR_BERR              0x00000001U    /*!< BERR error            */
  #define HAL_I2C_ERROR_ARLO              0x00000002U    /*!< ARLO error            */
  #define HAL_I2C_ERROR_AF                0x00000004U    /*!< AF error              */
  #define HAL_I2C_ERROR_OVR               0x00000008U    /*!< OVR error             */
  #define HAL_I2C_ERROR_DMA               0x00000010U    /*!< DMA transfer error    */
  #define HAL_I2C_ERROR_TIMEOUT           0x00000020U    /*!< Timeout Error         */
  #define HAL_I2C_ERROR_SIZE              0x00000040U    /*!< Size Management error */
  #define HAL_I2C_ERROR_DMA_PARAM         0x00000080U    /*!< DMA Parameter Error   */
  #if (USE_HAL_I2C_REGISTER_CALLBACKS == 1)
  #define HAL_I2C_ERROR_INVALID_CALLBACK  0x00000100U    /*!< Invalid Callback error */
  #endif /* USE_HAL_I2C_REGISTER_CALLBACKS */
  /**
    * @}
    */
  
  /** @defgroup I2C_handle_Structure_definition I2C handle Structure definition
    * @brief  I2C handle Structure definition
    * @{
    */
  typedef struct __I2C_HandleTypeDef
  {
    I2C_TypeDef                *Instance;      /*!< I2C registers base address               */
  
    I2C_InitTypeDef            Init;           /*!< I2C communication parameters             */
  
    uint8_t                    *pBuffPtr;      /*!< Pointer to I2C transfer buffer           */
  
    uint16_t                   XferSize;       /*!< I2C transfer size                        */
  
    __IO uint16_t              XferCount;      /*!< I2C transfer counter                     */
  
    __IO uint32_t              XferOptions;    /*!< I2C transfer options                     */
  
    __IO uint32_t              PreviousState;  /*!< I2C communication Previous state and mode
                                                    context for internal usage               */
  
    DMA_HandleTypeDef          *hdmatx;        /*!< I2C Tx DMA handle parameters             */
  
    DMA_HandleTypeDef          *hdmarx;        /*!< I2C Rx DMA handle parameters             */
  
    HAL_LockTypeDef            Lock;           /*!< I2C locking object                       */
  
    __IO HAL_I2C_StateTypeDef  State;          /*!< I2C communication state                  */
  
    __IO HAL_I2C_ModeTypeDef   Mode;           /*!< I2C communication mode                   */
  
    __IO uint32_t              ErrorCode;      /*!< I2C Error code                           */
  
    __IO uint32_t              Devaddress;     /*!< I2C Target device address                */
  
    __IO uint32_t              Memaddress;     /*!< I2C Target memory address                */
  
    __IO uint32_t              MemaddSize;     /*!< I2C Target memory address  size          */
  
    __IO uint32_t              EventCount;     /*!< I2C Event counter                        */
  
  
  #if (USE_HAL_I2C_REGISTER_CALLBACKS == 1)
    void (* MasterTxCpltCallback)(struct __I2C_HandleTypeDef *hi2c);           /*!< I2C Master Tx Transfer completed callback */
    void (* MasterRxCpltCallback)(struct __I2C_HandleTypeDef *hi2c);           /*!< I2C Master Rx Transfer completed callback */
    void (* SlaveTxCpltCallback)(struct __I2C_HandleTypeDef *hi2c);            /*!< I2C Slave Tx Transfer completed callback  */
    void (* SlaveRxCpltCallback)(struct __I2C_HandleTypeDef *hi2c);            /*!< I2C Slave Rx Transfer completed callback  */
    void (* ListenCpltCallback)(struct __I2C_HandleTypeDef *hi2c);             /*!< I2C Listen Complete callback              */
    void (* MemTxCpltCallback)(struct __I2C_HandleTypeDef *hi2c);              /*!< I2C Memory Tx Transfer completed callback */
    void (* MemRxCpltCallback)(struct __I2C_HandleTypeDef *hi2c);              /*!< I2C Memory Rx Transfer completed callback */
    void (* ErrorCallback)(struct __I2C_HandleTypeDef *hi2c);                  /*!< I2C Error callback                        */
    void (* AbortCpltCallback)(struct __I2C_HandleTypeDef *hi2c);              /*!< I2C Abort callback                        */
  
    void (* AddrCallback)(struct __I2C_HandleTypeDef *hi2c, uint8_t TransferDirection, uint16_t AddrMatchCode);  /*!< I2C Slave Address Match callback */
  
    void (* MspInitCallback)(struct __I2C_HandleTypeDef *hi2c);                /*!< I2C Msp Init callback                     */
    void (* MspDeInitCallback)(struct __I2C_HandleTypeDef *hi2c);              /*!< I2C Msp DeInit callback                   */
  
  #endif  /* USE_HAL_I2C_REGISTER_CALLBACKS */
  } I2C_HandleTypeDef;
  
  #if (USE_HAL_I2C_REGISTER_CALLBACKS == 1)
  /**
    * @brief  HAL I2C Callback ID enumeration definition
    */
  typedef enum
  {
    HAL_I2C_MASTER_TX_COMPLETE_CB_ID      = 0x00U,    /*!< I2C Master Tx Transfer completed callback ID  */
    HAL_I2C_MASTER_RX_COMPLETE_CB_ID      = 0x01U,    /*!< I2C Master Rx Transfer completed callback ID  */
    HAL_I2C_SLAVE_TX_COMPLETE_CB_ID       = 0x02U,    /*!< I2C Slave Tx Transfer completed callback ID   */
    HAL_I2C_SLAVE_RX_COMPLETE_CB_ID       = 0x03U,    /*!< I2C Slave Rx Transfer completed callback ID   */
    HAL_I2C_LISTEN_COMPLETE_CB_ID         = 0x04U,    /*!< I2C Listen Complete callback ID               */
    HAL_I2C_MEM_TX_COMPLETE_CB_ID         = 0x05U,    /*!< I2C Memory Tx Transfer callback ID            */
    HAL_I2C_MEM_RX_COMPLETE_CB_ID         = 0x06U,    /*!< I2C Memory Rx Transfer completed callback ID  */
    HAL_I2C_ERROR_CB_ID                   = 0x07U,    /*!< I2C Error callback ID                         */
    HAL_I2C_ABORT_CB_ID                   = 0x08U,    /*!< I2C Abort callback ID                         */
  
    HAL_I2C_MSPINIT_CB_ID                 = 0x09U,    /*!< I2C Msp Init callback ID                      */
    HAL_I2C_MSPDEINIT_CB_ID               = 0x0AU     /*!< I2C Msp DeInit callback ID                    */
  
  } HAL_I2C_CallbackIDTypeDef;
  
  /**
    * @brief  HAL I2C Callback pointer definition
    */
  typedef  void (*pI2C_CallbackTypeDef)(I2C_HandleTypeDef *hi2c); /*!< pointer to an I2C callback function */
  typedef  void (*pI2C_AddrCallbackTypeDef)(I2C_HandleTypeDef *hi2c, uint8_t TransferDirection, uint16_t AddrMatchCode); /*!< pointer to an I2C Address Match callback function */
  
  #endif /* USE_HAL_I2C_REGISTER_CALLBACKS */
  /**
    * @}
    */
  
  /**
    * @}
    */
  /* Exported constants --------------------------------------------------------*/
  
  /** @defgroup I2C_Exported_Constants I2C Exported Constants
    * @{
    */
  
  /** @defgroup I2C_duty_cycle_in_fast_mode I2C duty cycle in fast mode
    * @{
    */
  #define I2C_DUTYCYCLE_2                 0x00000000U
  #define I2C_DUTYCYCLE_16_9              I2C_CCR_DUTY
  /**
    * @}
    */
  
  /** @defgroup I2C_addressing_mode I2C addressing mode
    * @{
    */
  #define I2C_ADDRESSINGMODE_7BIT         0x00004000U
  #define I2C_ADDRESSINGMODE_10BIT        (I2C_OAR1_ADDMODE | 0x00004000U)
  /**
    * @}
    */
  
  /** @defgroup I2C_dual_addressing_mode  I2C dual addressing mode
    * @{
    */
  #define I2C_DUALADDRESS_DISABLE        0x00000000U
  #define I2C_DUALADDRESS_ENABLE         I2C_OAR2_ENDUAL
  /**
    * @}
    */
  
  /** @defgroup I2C_general_call_addressing_mode I2C general call addressing mode
    * @{
    */
  #define I2C_GENERALCALL_DISABLE        0x00000000U
  #define I2C_GENERALCALL_ENABLE         I2C_CR1_ENGC
  /**
    * @}
    */
  
  /** @defgroup I2C_nostretch_mode I2C nostretch mode
    * @{
    */
  #define I2C_NOSTRETCH_DISABLE          0x00000000U
  #define I2C_NOSTRETCH_ENABLE           I2C_CR1_NOSTRETCH
  /**
    * @}
    */
  
  /** @defgroup I2C_Memory_Address_Size I2C Memory Address Size
    * @{
    */
  #define I2C_MEMADD_SIZE_8BIT            0x00000001U
  #define I2C_MEMADD_SIZE_16BIT           0x00000010U
  /**
    * @}
    */
  
  /** @defgroup I2C_XferDirection_definition I2C XferDirection definition
    * @{
    */
  #define I2C_DIRECTION_RECEIVE           0x00000000U
  #define I2C_DIRECTION_TRANSMIT          0x00000001U
  /**
    * @}
    */
  
  /** @defgroup I2C_XferOptions_definition I2C XferOptions definition
    * @{
    */
  #define  I2C_FIRST_FRAME                0x00000001U
  #define  I2C_FIRST_AND_NEXT_FRAME       0x00000002U
  #define  I2C_NEXT_FRAME                 0x00000004U
  #define  I2C_FIRST_AND_LAST_FRAME       0x00000008U
  #define  I2C_LAST_FRAME_NO_STOP         0x00000010U
  #define  I2C_LAST_FRAME                 0x00000020U
  
  /* List of XferOptions in usage of :
   * 1- Restart condition in all use cases (direction change or not)
   */
  #define  I2C_OTHER_FRAME                (0x00AA0000U)
  #define  I2C_OTHER_AND_LAST_FRAME       (0xAA000000U)
  /**
    * @}
    */
  
  /** @defgroup I2C_Interrupt_configuration_definition I2C Interrupt configuration definition
    * @brief I2C Interrupt definition
    *        Elements values convention: 0xXXXXXXXX
    *           - XXXXXXXX  : Interrupt control mask
    * @{
    */
  #define I2C_IT_BUF                      I2C_CR2_ITBUFEN
  #define I2C_IT_EVT                      I2C_CR2_ITEVTEN
  #define I2C_IT_ERR                      I2C_CR2_ITERREN
  /**
    * @}
    */
  
  /** @defgroup I2C_Flag_definition I2C Flag definition
    * @{
    */
  
  #define I2C_FLAG_OVR                    0x00010800U
  #define I2C_FLAG_AF                     0x00010400U
  #define I2C_FLAG_ARLO                   0x00010200U
  #define I2C_FLAG_BERR                   0x00010100U
  #define I2C_FLAG_TXE                    0x00010080U
  #define I2C_FLAG_RXNE                   0x00010040U
  #define I2C_FLAG_STOPF                  0x00010010U
  #define I2C_FLAG_ADD10                  0x00010008U
  #define I2C_FLAG_BTF                    0x00010004U
  #define I2C_FLAG_ADDR                   0x00010002U
  #define I2C_FLAG_SB                     0x00010001U
  #define I2C_FLAG_DUALF                  0x00100080U
  #define I2C_FLAG_GENCALL                0x00100010U
  #define I2C_FLAG_TRA                    0x00100004U
  #define I2C_FLAG_BUSY                   0x00100002U
  #define I2C_FLAG_MSL                    0x00100001U
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /* Exported macros -----------------------------------------------------------*/
  
  /** @defgroup I2C_Exported_Macros I2C Exported Macros
    * @{
    */
  
  /** @brief Reset I2C handle state.
    * @param  __HANDLE__ specifies the I2C Handle.
    * @retval None
    */
  #if (USE_HAL_I2C_REGISTER_CALLBACKS == 1)
  #define __HAL_I2C_RESET_HANDLE_STATE(__HANDLE__)                do{                                                   \
                                                                      (__HANDLE__)->State = HAL_I2C_STATE_RESET;       \
                                                                      (__HANDLE__)->MspInitCallback = NULL;            \
                                                                      (__HANDLE__)->MspDeInitCallback = NULL;          \
                                                                    } while(0)
  #else
  #define __HAL_I2C_RESET_HANDLE_STATE(__HANDLE__)                ((__HANDLE__)->State = HAL_I2C_STATE_RESET)
  #endif
  
  /** @brief  Enable or disable the specified I2C interrupts.
    * @param  __HANDLE__ specifies the I2C Handle.
    * @param  __INTERRUPT__ specifies the interrupt source to enable or disable.
    *         This parameter can be one of the following values:
    *            @arg I2C_IT_BUF: Buffer interrupt enable
    *            @arg I2C_IT_EVT: Event interrupt enable
    *            @arg I2C_IT_ERR: Error interrupt enable
    * @retval None
    */
  #define __HAL_I2C_ENABLE_IT(__HANDLE__, __INTERRUPT__)   SET_BIT((__HANDLE__)->Instance->CR2,(__INTERRUPT__))
  #define __HAL_I2C_DISABLE_IT(__HANDLE__, __INTERRUPT__)  CLEAR_BIT((__HANDLE__)->Instance->CR2, (__INTERRUPT__))
  
  /** @brief  Checks if the specified I2C interrupt source is enabled or disabled.
    * @param  __HANDLE__ specifies the I2C Handle.
    * @param  __INTERRUPT__ specifies the I2C interrupt source to check.
    *          This parameter can be one of the following values:
    *            @arg I2C_IT_BUF: Buffer interrupt enable
    *            @arg I2C_IT_EVT: Event interrupt enable
    *            @arg I2C_IT_ERR: Error interrupt enable
    * @retval The new state of __INTERRUPT__ (TRUE or FALSE).
    */
  #define __HAL_I2C_GET_IT_SOURCE(__HANDLE__, __INTERRUPT__) ((((__HANDLE__)->Instance->CR2 & (__INTERRUPT__)) == (__INTERRUPT__)) ? SET : RESET)
  
  /** @brief  Checks whether the specified I2C flag is set or not.
    * @param  __HANDLE__ specifies the I2C Handle.
    * @param  __FLAG__ specifies the flag to check.
    *         This parameter can be one of the following values:
    *            @arg I2C_FLAG_OVR: Overrun/Underrun flag
    *            @arg I2C_FLAG_AF: Acknowledge failure flag
    *            @arg I2C_FLAG_ARLO: Arbitration lost flag
    *            @arg I2C_FLAG_BERR: Bus error flag
    *            @arg I2C_FLAG_TXE: Data register empty flag
    *            @arg I2C_FLAG_RXNE: Data register not empty flag
    *            @arg I2C_FLAG_STOPF: Stop detection flag
    *            @arg I2C_FLAG_ADD10: 10-bit header sent flag
    *            @arg I2C_FLAG_BTF: Byte transfer finished flag
    *            @arg I2C_FLAG_ADDR: Address sent flag
    *                                Address matched flag
    *            @arg I2C_FLAG_SB: Start bit flag
    *            @arg I2C_FLAG_DUALF: Dual flag
    *            @arg I2C_FLAG_GENCALL: General call header flag
    *            @arg I2C_FLAG_TRA: Transmitter/Receiver flag
    *            @arg I2C_FLAG_BUSY: Bus busy flag
    *            @arg I2C_FLAG_MSL: Master/Slave flag
    * @retval The new state of __FLAG__ (TRUE or FALSE).
    */
  #define __HAL_I2C_GET_FLAG(__HANDLE__, __FLAG__) ((((uint8_t)((__FLAG__) >> 16U)) == 0x01U) ? \
                                                    (((((__HANDLE__)->Instance->SR1) & ((__FLAG__) & I2C_FLAG_MASK)) == ((__FLAG__) & I2C_FLAG_MASK)) ? SET : RESET) : \
                                                    (((((__HANDLE__)->Instance->SR2) & ((__FLAG__) & I2C_FLAG_MASK)) == ((__FLAG__) & I2C_FLAG_MASK)) ? SET : RESET))
  
  /** @brief  Clears the I2C pending flags which are cleared by writing 0 in a specific bit.
    * @param  __HANDLE__ specifies the I2C Handle.
    * @param  __FLAG__ specifies the flag to clear.
    *         This parameter can be any combination of the following values:
    *            @arg I2C_FLAG_OVR: Overrun/Underrun flag (Slave mode)
    *            @arg I2C_FLAG_AF: Acknowledge failure flag
    *            @arg I2C_FLAG_ARLO: Arbitration lost flag (Master mode)
    *            @arg I2C_FLAG_BERR: Bus error flag
    * @retval None
    */
  #define __HAL_I2C_CLEAR_FLAG(__HANDLE__, __FLAG__) ((__HANDLE__)->Instance->SR1 = ~((__FLAG__) & I2C_FLAG_MASK))
  
  /** @brief  Clears the I2C ADDR pending flag.
    * @param  __HANDLE__ specifies the I2C Handle.
    *         This parameter can be I2C where x: 1, 2, or 3 to select the I2C peripheral.
    * @retval None
    */
  #define __HAL_I2C_CLEAR_ADDRFLAG(__HANDLE__)    \
    do{                                           \
      __IO uint32_t tmpreg = 0x00U;               \
      tmpreg = (__HANDLE__)->Instance->SR1;       \
      tmpreg = (__HANDLE__)->Instance->SR2;       \
      UNUSED(tmpreg);                             \
    } while(0)
  
  /** @brief  Clears the I2C STOPF pending flag.
    * @param  __HANDLE__ specifies the I2C Handle.
    * @retval None
    */
  #define __HAL_I2C_CLEAR_STOPFLAG(__HANDLE__)           \
    do{                                                  \
      __IO uint32_t tmpreg = 0x00U;                      \
      tmpreg = (__HANDLE__)->Instance->SR1;              \
      SET_BIT((__HANDLE__)->Instance->CR1, I2C_CR1_PE);  \
      UNUSED(tmpreg);                                    \
    } while(0)
  
  /** @brief  Enable the specified I2C peripheral.
    * @param  __HANDLE__ specifies the I2C Handle.
    * @retval None
    */
  #define __HAL_I2C_ENABLE(__HANDLE__)                  SET_BIT((__HANDLE__)->Instance->CR1, I2C_CR1_PE)
  
  /** @brief  Disable the specified I2C peripheral.
    * @param  __HANDLE__ specifies the I2C Handle.
    * @retval None
    */
  #define __HAL_I2C_DISABLE(__HANDLE__)                 CLEAR_BIT((__HANDLE__)->Instance->CR1, I2C_CR1_PE)
  
  /**
    * @}
    */
  
  /* Exported functions --------------------------------------------------------*/
  /** @addtogroup I2C_Exported_Functions
    * @{
    */
  
  /** @addtogroup I2C_Exported_Functions_Group1 Initialization and de-initialization functions
    * @{
    */
  /* Initialization and de-initialization functions******************************/
  HAL_StatusTypeDef HAL_I2C_Init(I2C_HandleTypeDef *hi2c);
  HAL_StatusTypeDef HAL_I2C_DeInit(I2C_HandleTypeDef *hi2c);
  void HAL_I2C_MspInit(I2C_HandleTypeDef *hi2c);
  void HAL_I2C_MspDeInit(I2C_HandleTypeDef *hi2c);
  
  /* Callbacks Register/UnRegister functions  ***********************************/
  #if (USE_HAL_I2C_REGISTER_CALLBACKS == 1)
  HAL_StatusTypeDef HAL_I2C_RegisterCallback(I2C_HandleTypeDef *hi2c, HAL_I2C_CallbackIDTypeDef CallbackID, pI2C_CallbackTypeDef pCallback);
  HAL_StatusTypeDef HAL_I2C_UnRegisterCallback(I2C_HandleTypeDef *hi2c, HAL_I2C_CallbackIDTypeDef CallbackID);
  
  HAL_StatusTypeDef HAL_I2C_RegisterAddrCallback(I2C_HandleTypeDef *hi2c, pI2C_AddrCallbackTypeDef pCallback);
  HAL_StatusTypeDef HAL_I2C_UnRegisterAddrCallback(I2C_HandleTypeDef *hi2c);
  #endif /* USE_HAL_I2C_REGISTER_CALLBACKS */
  /**
    * @}
    */
  
  /** @addtogroup I2C_Exported_Functions_Group2 Input and Output operation functions
    * @{
    */
  /* IO operation functions  ****************************************************/
  /******* Blocking mode: Polling */
  HAL_StatusTypeDef HAL_I2C_Master_Transmit(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t Timeout);
  HAL_StatusTypeDef HAL_I2C_Master_Receive(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t Timeout);
  HAL_StatusTypeDef HAL_I2C_Slave_Transmit(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size, uint32_t Timeout);
  HAL_StatusTypeDef HAL_I2C_Slave_Receive(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size, uint32_t Timeout);
  HAL_StatusTypeDef HAL_I2C_Mem_Write(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size, uint32_t Timeout);
  HAL_StatusTypeDef HAL_I2C_Mem_Read(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size, uint32_t Timeout);
  HAL_StatusTypeDef HAL_I2C_IsDeviceReady(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint32_t Trials, uint32_t Timeout);
  
  /******* Non-Blocking mode: Interrupt */
  HAL_StatusTypeDef HAL_I2C_Master_Transmit_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size);
  HAL_StatusTypeDef HAL_I2C_Master_Receive_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size);
  HAL_StatusTypeDef HAL_I2C_Slave_Transmit_IT(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size);
  HAL_StatusTypeDef HAL_I2C_Slave_Receive_IT(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size);
  HAL_StatusTypeDef HAL_I2C_Mem_Write_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size);
  HAL_StatusTypeDef HAL_I2C_Mem_Read_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size);
  
  HAL_StatusTypeDef HAL_I2C_Master_Seq_Transmit_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t XferOptions);
  HAL_StatusTypeDef HAL_I2C_Master_Seq_Receive_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t XferOptions);
  HAL_StatusTypeDef HAL_I2C_Slave_Seq_Transmit_IT(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size, uint32_t XferOptions);
  HAL_StatusTypeDef HAL_I2C_Slave_Seq_Receive_IT(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size, uint32_t XferOptions);
  HAL_StatusTypeDef HAL_I2C_EnableListen_IT(I2C_HandleTypeDef *hi2c);
  HAL_StatusTypeDef HAL_I2C_DisableListen_IT(I2C_HandleTypeDef *hi2c);
  HAL_StatusTypeDef HAL_I2C_Master_Abort_IT(I2C_HandleTypeDef *hi2c, uint16_t DevAddress);
  
  /******* Non-Blocking mode: DMA */
  HAL_StatusTypeDef HAL_I2C_Master_Transmit_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size);
  HAL_StatusTypeDef HAL_I2C_Master_Receive_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size);
  HAL_StatusTypeDef HAL_I2C_Slave_Transmit_DMA(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size);
  HAL_StatusTypeDef HAL_I2C_Slave_Receive_DMA(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size);
  HAL_StatusTypeDef HAL_I2C_Mem_Write_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size);
  HAL_StatusTypeDef HAL_I2C_Mem_Read_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint16_t MemAddress, uint16_t MemAddSize, uint8_t *pData, uint16_t Size);
  
  HAL_StatusTypeDef HAL_I2C_Master_Seq_Transmit_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t XferOptions);
  HAL_StatusTypeDef HAL_I2C_Master_Seq_Receive_DMA(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t XferOptions);
  HAL_StatusTypeDef HAL_I2C_Slave_Seq_Transmit_DMA(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size, uint32_t XferOptions);
  HAL_StatusTypeDef HAL_I2C_Slave_Seq_Receive_DMA(I2C_HandleTypeDef *hi2c, uint8_t *pData, uint16_t Size, uint32_t XferOptions);
  /**
    * @}
    */
  
  /** @addtogroup I2C_IRQ_Handler_and_Callbacks IRQ Handler and Callbacks
   * @{
   */
  /******* I2C IRQHandler and Callbacks used in non blocking modes (Interrupt and DMA) */
  void HAL_I2C_EV_IRQHandler(I2C_HandleTypeDef *hi2c);
  void HAL_I2C_ER_IRQHandler(I2C_HandleTypeDef *hi2c);
  void HAL_I2C_MasterTxCpltCallback(I2C_HandleTypeDef *hi2c);
  void HAL_I2C_MasterRxCpltCallback(I2C_HandleTypeDef *hi2c);
  void HAL_I2C_SlaveTxCpltCallback(I2C_HandleTypeDef *hi2c);
  void HAL_I2C_SlaveRxCpltCallback(I2C_HandleTypeDef *hi2c);
  void HAL_I2C_AddrCallback(I2C_HandleTypeDef *hi2c, uint8_t TransferDirection, uint16_t AddrMatchCode);
  void HAL_I2C_ListenCpltCallback(I2C_HandleTypeDef *hi2c);
  void HAL_I2C_MemTxCpltCallback(I2C_HandleTypeDef *hi2c);
  void HAL_I2C_MemRxCpltCallback(I2C_HandleTypeDef *hi2c);
  void HAL_I2C_ErrorCallback(I2C_HandleTypeDef *hi2c);
  void HAL_I2C_AbortCpltCallback(I2C_HandleTypeDef *hi2c);
  /**
    * @}
    */
  
  /** @addtogroup I2C_Exported_Functions_Group3 Peripheral State, Mode and Error functions
    * @{
    */
  /* Peripheral State, Mode and Error functions  *********************************/
  HAL_I2C_StateTypeDef HAL_I2C_GetState(I2C_HandleTypeDef *hi2c);
  HAL_I2C_ModeTypeDef HAL_I2C_GetMode(I2C_HandleTypeDef *hi2c);
  uint32_t HAL_I2C_GetError(I2C_HandleTypeDef *hi2c);
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  /* Private types -------------------------------------------------------------*/
  /* Private variables ---------------------------------------------------------*/
  /* Private constants ---------------------------------------------------------*/
  /** @defgroup I2C_Private_Constants I2C Private Constants
    * @{
    */
  #define I2C_FLAG_MASK                    0x0000FFFFU
  #define I2C_MIN_PCLK_FREQ_STANDARD       2000000U     /*!< 2 MHz                     */
  #define I2C_MIN_PCLK_FREQ_FAST           4000000U     /*!< 4 MHz                     */
  /**
    * @}
    */
  
  /* Private macros ------------------------------------------------------------*/
  /** @defgroup I2C_Private_Macros I2C Private Macros
    * @{
    */
  
  #define I2C_MIN_PCLK_FREQ(__PCLK__, __SPEED__)             (((__SPEED__) <= 100000U) ? ((__PCLK__) < I2C_MIN_PCLK_FREQ_STANDARD) : ((__PCLK__) < I2C_MIN_PCLK_FREQ_FAST))
  #define I2C_CCR_CALCULATION(__PCLK__, __SPEED__, __COEFF__)     (((((__PCLK__) - 1U)/((__SPEED__) * (__COEFF__))) + 1U) & I2C_CCR_CCR)
  #define I2C_FREQRANGE(__PCLK__)                            ((__PCLK__)/1000000U)
  #define I2C_RISE_TIME(__FREQRANGE__, __SPEED__)            (((__SPEED__) <= 100000U) ? ((__FREQRANGE__) + 1U) : ((((__FREQRANGE__) * 300U) / 1000U) + 1U))
  #define I2C_SPEED_STANDARD(__PCLK__, __SPEED__)            ((I2C_CCR_CALCULATION((__PCLK__), (__SPEED__), 2U) < 4U)? 4U:I2C_CCR_CALCULATION((__PCLK__), (__SPEED__), 2U))
  #define I2C_SPEED_FAST(__PCLK__, __SPEED__, __DUTYCYCLE__) (((__DUTYCYCLE__) == I2C_DUTYCYCLE_2)? I2C_CCR_CALCULATION((__PCLK__), (__SPEED__), 3U) : (I2C_CCR_CALCULATION((__PCLK__), (__SPEED__), 25U) | I2C_DUTYCYCLE_16_9))
  #define I2C_SPEED(__PCLK__, __SPEED__, __DUTYCYCLE__)      (((__SPEED__) <= 100000U)? (I2C_SPEED_STANDARD((__PCLK__), (__SPEED__))) : \
                                                                    ((I2C_SPEED_FAST((__PCLK__), (__SPEED__), (__DUTYCYCLE__)) & I2C_CCR_CCR) == 0U)? 1U : \
                                                                    ((I2C_SPEED_FAST((__PCLK__), (__SPEED__), (__DUTYCYCLE__))) | I2C_CCR_FS))
  
  #define I2C_7BIT_ADD_WRITE(__ADDRESS__)                    ((uint8_t)((__ADDRESS__) & (uint8_t)(~I2C_OAR1_ADD0)))
  #define I2C_7BIT_ADD_READ(__ADDRESS__)                     ((uint8_t)((__ADDRESS__) | I2C_OAR1_ADD0))
  
  #define I2C_10BIT_ADDRESS(__ADDRESS__)                     ((uint8_t)((uint16_t)((__ADDRESS__) & (uint16_t)0x00FF)))
  #define I2C_10BIT_HEADER_WRITE(__ADDRESS__)                ((uint8_t)((uint16_t)((uint16_t)(((uint16_t)((__ADDRESS__) & (uint16_t)0x0300)) >> 7) | (uint16_t)0x00F0)))
  #define I2C_10BIT_HEADER_READ(__ADDRESS__)                 ((uint8_t)((uint16_t)((uint16_t)(((uint16_t)((__ADDRESS__) & (uint16_t)0x0300)) >> 7) | (uint16_t)(0x00F1))))
  
  #define I2C_MEM_ADD_MSB(__ADDRESS__)                       ((uint8_t)((uint16_t)(((uint16_t)((__ADDRESS__) & (uint16_t)0xFF00)) >> 8)))
  #define I2C_MEM_ADD_LSB(__ADDRESS__)                       ((uint8_t)((uint16_t)((__ADDRESS__) & (uint16_t)0x00FF)))
  
  /** @defgroup I2C_IS_RTC_Definitions I2C Private macros to check input parameters
    * @{
    */
  #define IS_I2C_DUTY_CYCLE(CYCLE) (((CYCLE) == I2C_DUTYCYCLE_2) || \
                                    ((CYCLE) == I2C_DUTYCYCLE_16_9))
  #define IS_I2C_ADDRESSING_MODE(ADDRESS) (((ADDRESS) == I2C_ADDRESSINGMODE_7BIT) || \
                                           ((ADDRESS) == I2C_ADDRESSINGMODE_10BIT))
  #define IS_I2C_DUAL_ADDRESS(ADDRESS) (((ADDRESS) == I2C_DUALADDRESS_DISABLE) || \
                                        ((ADDRESS) == I2C_DUALADDRESS_ENABLE))
  #define IS_I2C_GENERAL_CALL(CALL) (((CALL) == I2C_GENERALCALL_DISABLE) || \
                                     ((CALL) == I2C_GENERALCALL_ENABLE))
  #define IS_I2C_NO_STRETCH(STRETCH) (((STRETCH) == I2C_NOSTRETCH_DISABLE) || \
                                      ((STRETCH) == I2C_NOSTRETCH_ENABLE))
  #define IS_I2C_MEMADD_SIZE(SIZE) (((SIZE) == I2C_MEMADD_SIZE_8BIT) || \
                                    ((SIZE) == I2C_MEMADD_SIZE_16BIT))
  #define IS_I2C_CLOCK_SPEED(SPEED) (((SPEED) > 0U) && ((SPEED) <= 400000U))
  #define IS_I2C_OWN_ADDRESS1(ADDRESS1) (((ADDRESS1) & 0xFFFFFC00U) == 0U)
  #define IS_I2C_OWN_ADDRESS2(ADDRESS2) (((ADDRESS2) & 0xFFFFFF01U) == 0U)
  #define IS_I2C_TRANSFER_OPTIONS_REQUEST(REQUEST)      (((REQUEST) == I2C_FIRST_FRAME)              || \
                                                         ((REQUEST) == I2C_FIRST_AND_NEXT_FRAME)     || \
                                                         ((REQUEST) == I2C_NEXT_FRAME)               || \
                                                         ((REQUEST) == I2C_FIRST_AND_LAST_FRAME)     || \
                                                         ((REQUEST) == I2C_LAST_FRAME)               || \
                                                         ((REQUEST) == I2C_LAST_FRAME_NO_STOP)       || \
                                                         IS_I2C_TRANSFER_OTHER_OPTIONS_REQUEST(REQUEST))
  
  #define IS_I2C_TRANSFER_OTHER_OPTIONS_REQUEST(REQUEST) (((REQUEST) == I2C_OTHER_FRAME)     || \
                                                          ((REQUEST) == I2C_OTHER_AND_LAST_FRAME))
  
  #define I2C_CHECK_FLAG(__ISR__, __FLAG__)         ((((__ISR__) & ((__FLAG__) & I2C_FLAG_MASK)) == ((__FLAG__) & I2C_FLAG_MASK)) ? SET : RESET)
  #define I2C_CHECK_IT_SOURCE(__CR1__, __IT__)      ((((__CR1__) & (__IT__)) == (__IT__)) ? SET : RESET)
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /* Private functions ---------------------------------------------------------*/
  /** @defgroup I2C_Private_Functions I2C Private Functions
    * @{
    */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  #ifdef __cplusplus
  }
  #endif
  
  
  #endif /* __STM32F1xx_HAL_I2C_H */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  