text: /**
    ******************************************************************************
    * @file    stm32l0xx_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 STM32L0xx_HAL_I2C_H
  #define STM32L0xx_HAL_I2C_H
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32l0xx_hal_def.h"
  
  /** @addtogroup STM32L0xx_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 Timing;              /*!< Specifies the I2C_TIMINGR_register value.
                                    This parameter calculated by referring to I2C initialization
                                           section in Reference manual */
  
      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 OwnAddress2Masks;    /*!< Specifies the acknowledge mask address second device own address if dual addressing mode is selected
                                    This parameter can be a value of @ref I2C_OWN_ADDRESS2_MASKS */
  
      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 :\n
    *          b7-b6  Error information\n
    *             00 : No Error\n
    *             01 : Abort (Abort user request on going)\n
    *             10 : Timeout\n
    *             11 : Error\n
    *          b5     IP initilisation status\n
    *             0  : Reset (IP not initialized)\n
    *             1  : Init done (IP initialized and ready to use. HAL I2C Init function called)\n
    *          b4     (not used)\n
    *             x  : Should be set to 0\n
    *          b3\n
    *             0  : Ready or Busy (No Listen mode ongoing)\n
    *             1  : Listen (IP in Address Listen Mode)\n
    *          b2     Intrinsic process state\n
    *             0  : Ready\n
    *             1  : Busy (IP busy with some configuration or internal operations)\n
    *          b1     Rx state\n
    *             0  : Ready (no Rx operation ongoing)\n
    *             1  : Busy (Rx operation ongoing)\n
    *          b0     Tx state\n
    *             0  : Ready (no Tx operation ongoing)\n
    *             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)    /*!< ACKF 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 */
  #define HAL_I2C_ERROR_INVALID_PARAM     (0x00000200U)    /*!< Invalid Parameters error  */
  /**
    * @}
    */
  
  /** @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 sequantial transfer options, this parameter can
                                                    be a value of @ref I2C_XFEROPTIONS */
  
      __IO uint32_t              PreviousState;  /*!< I2C communication Previous state          */
  
      HAL_StatusTypeDef( *XferISR )( struct __I2C_HandleTypeDef *hi2c, uint32_t ITFlags, uint32_t ITSources ); /*!< I2C transfer IRQ handler function pointer */
  
      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              AddrEventCount; /*!< I2C Address 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_XFEROPTIONS  I2C Sequential Transfer Options
    * @{
    */
  #define I2C_FIRST_FRAME                 ((uint32_t)I2C_SOFTEND_MODE)
  #define I2C_FIRST_AND_NEXT_FRAME        ((uint32_t)(I2C_RELOAD_MODE | I2C_SOFTEND_MODE))
  #define I2C_NEXT_FRAME                  ((uint32_t)(I2C_RELOAD_MODE | I2C_SOFTEND_MODE))
  #define I2C_FIRST_AND_LAST_FRAME        ((uint32_t)I2C_AUTOEND_MODE)
  #define I2C_LAST_FRAME                  ((uint32_t)I2C_AUTOEND_MODE)
  #define I2C_LAST_FRAME_NO_STOP          ((uint32_t)I2C_SOFTEND_MODE)
  
  /* List of XferOptions in usage of :
   * 1- Restart condition in all use cases (direction change or not)
   */
  #define  I2C_OTHER_FRAME                (0x000000AAU)
  #define  I2C_OTHER_AND_LAST_FRAME       (0x0000AA00U)
  /**
    * @}
    */
  
  /** @defgroup I2C_ADDRESSING_MODE I2C Addressing Mode
    * @{
    */
  #define I2C_ADDRESSINGMODE_7BIT         (0x00000001U)
  #define I2C_ADDRESSINGMODE_10BIT        (0x00000002U)
  /**
    * @}
    */
  
  /** @defgroup I2C_DUAL_ADDRESSING_MODE I2C Dual Addressing Mode
    * @{
    */
  #define I2C_DUALADDRESS_DISABLE         (0x00000000U)
  #define I2C_DUALADDRESS_ENABLE          I2C_OAR2_OA2EN
  /**
    * @}
    */
  
  /** @defgroup I2C_OWN_ADDRESS2_MASKS I2C Own Address2 Masks
    * @{
    */
  #define I2C_OA2_NOMASK                  ((uint8_t)0x00U)
  #define I2C_OA2_MASK01                  ((uint8_t)0x01U)
  #define I2C_OA2_MASK02                  ((uint8_t)0x02U)
  #define I2C_OA2_MASK03                  ((uint8_t)0x03U)
  #define I2C_OA2_MASK04                  ((uint8_t)0x04U)
  #define I2C_OA2_MASK05                  ((uint8_t)0x05U)
  #define I2C_OA2_MASK06                  ((uint8_t)0x06U)
  #define I2C_OA2_MASK07                  ((uint8_t)0x07U)
  /**
    * @}
    */
  
  /** @defgroup I2C_GENERAL_CALL_ADDRESSING_MODE I2C General Call Addressing Mode
    * @{
    */
  #define I2C_GENERALCALL_DISABLE         (0x00000000U)
  #define I2C_GENERALCALL_ENABLE          I2C_CR1_GCEN
  /**
    * @}
    */
  
  /** @defgroup I2C_NOSTRETCH_MODE I2C No-Stretch 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           (0x00000002U)
  /**
    * @}
    */
  
  /** @defgroup I2C_XFERDIRECTION I2C Transfer Direction Master Point of View
    * @{
    */
  #define I2C_DIRECTION_TRANSMIT          (0x00000000U)
  #define I2C_DIRECTION_RECEIVE           (0x00000001U)
  /**
    * @}
    */
  
  /** @defgroup I2C_RELOAD_END_MODE I2C Reload End Mode
    * @{
    */
  #define  I2C_RELOAD_MODE                I2C_CR2_RELOAD
  #define  I2C_AUTOEND_MODE               I2C_CR2_AUTOEND
  #define  I2C_SOFTEND_MODE               (0x00000000U)
  /**
    * @}
    */
  
  /** @defgroup I2C_START_STOP_MODE I2C Start or Stop Mode
    * @{
    */
  #define  I2C_NO_STARTSTOP               (0x00000000U)
  #define  I2C_GENERATE_STOP              (uint32_t)(0x80000000U | I2C_CR2_STOP)
  #define  I2C_GENERATE_START_READ        (uint32_t)(0x80000000U | I2C_CR2_START | I2C_CR2_RD_WRN)
  #define  I2C_GENERATE_START_WRITE       (uint32_t)(0x80000000U | I2C_CR2_START)
  /**
    * @}
    */
  
  /** @defgroup I2C_Interrupt_configuration_definition I2C Interrupt configuration definition
    * @brief I2C Interrupt definition
    *        Elements values convention: 0xXXXXXXXX
    *           - XXXXXXXX  : Interrupt control mask
    * @{
    */
  #define I2C_IT_ERRI                     I2C_CR1_ERRIE
  #define I2C_IT_TCI                      I2C_CR1_TCIE
  #define I2C_IT_STOPI                    I2C_CR1_STOPIE
  #define I2C_IT_NACKI                    I2C_CR1_NACKIE
  #define I2C_IT_ADDRI                    I2C_CR1_ADDRIE
  #define I2C_IT_RXI                      I2C_CR1_RXIE
  #define I2C_IT_TXI                      I2C_CR1_TXIE
  /**
    * @}
    */
  
  /** @defgroup I2C_Flag_definition I2C Flag definition
    * @{
    */
  #define I2C_FLAG_TXE                    I2C_ISR_TXE
  #define I2C_FLAG_TXIS                   I2C_ISR_TXIS
  #define I2C_FLAG_RXNE                   I2C_ISR_RXNE
  #define I2C_FLAG_ADDR                   I2C_ISR_ADDR
  #define I2C_FLAG_AF                     I2C_ISR_NACKF
  #define I2C_FLAG_STOPF                  I2C_ISR_STOPF
  #define I2C_FLAG_TC                     I2C_ISR_TC
  #define I2C_FLAG_TCR                    I2C_ISR_TCR
  #define I2C_FLAG_BERR                   I2C_ISR_BERR
  #define I2C_FLAG_ARLO                   I2C_ISR_ARLO
  #define I2C_FLAG_OVR                    I2C_ISR_OVR
  #define I2C_FLAG_PECERR                 I2C_ISR_PECERR
  #define I2C_FLAG_TIMEOUT                I2C_ISR_TIMEOUT
  #define I2C_FLAG_ALERT                  I2C_ISR_ALERT
  #define I2C_FLAG_BUSY                   I2C_ISR_BUSY
  #define I2C_FLAG_DIR                    I2C_ISR_DIR
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /* 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 the specified I2C interrupt.
    * @param  __HANDLE__ specifies the I2C Handle.
    * @param  __INTERRUPT__ specifies the interrupt source to enable.
    *        This parameter can be one of the following values:
    *            @arg @ref I2C_IT_ERRI  Errors interrupt enable
    *            @arg @ref I2C_IT_TCI   Transfer complete interrupt enable
    *            @arg @ref I2C_IT_STOPI STOP detection interrupt enable
    *            @arg @ref I2C_IT_NACKI NACK received interrupt enable
    *            @arg @ref I2C_IT_ADDRI Address match interrupt enable
    *            @arg @ref I2C_IT_RXI   RX interrupt enable
    *            @arg @ref I2C_IT_TXI   TX interrupt enable
    *
    * @retval None
    */
  #define __HAL_I2C_ENABLE_IT(__HANDLE__, __INTERRUPT__)          ((__HANDLE__)->Instance->CR1 |= (__INTERRUPT__))
  
  /** @brief  Disable the specified I2C interrupt.
    * @param  __HANDLE__ specifies the I2C Handle.
    * @param  __INTERRUPT__ specifies the interrupt source to disable.
    *        This parameter can be one of the following values:
    *            @arg @ref I2C_IT_ERRI  Errors interrupt enable
    *            @arg @ref I2C_IT_TCI   Transfer complete interrupt enable
    *            @arg @ref I2C_IT_STOPI STOP detection interrupt enable
    *            @arg @ref I2C_IT_NACKI NACK received interrupt enable
    *            @arg @ref I2C_IT_ADDRI Address match interrupt enable
    *            @arg @ref I2C_IT_RXI   RX interrupt enable
    *            @arg @ref I2C_IT_TXI   TX interrupt enable
    *
    * @retval None
    */
  #define __HAL_I2C_DISABLE_IT(__HANDLE__, __INTERRUPT__)         ((__HANDLE__)->Instance->CR1 &= (~(__INTERRUPT__)))
  
  /** @brief  Check whether the specified I2C interrupt source is enabled or not.
    * @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 @ref I2C_IT_ERRI  Errors interrupt enable
    *            @arg @ref I2C_IT_TCI   Transfer complete interrupt enable
    *            @arg @ref I2C_IT_STOPI STOP detection interrupt enable
    *            @arg @ref I2C_IT_NACKI NACK received interrupt enable
    *            @arg @ref I2C_IT_ADDRI Address match interrupt enable
    *            @arg @ref I2C_IT_RXI   RX interrupt enable
    *            @arg @ref I2C_IT_TXI   TX interrupt enable
    *
    * @retval The new state of __INTERRUPT__ (SET or RESET).
    */
  #define __HAL_I2C_GET_IT_SOURCE(__HANDLE__, __INTERRUPT__)      ((((__HANDLE__)->Instance->CR1 & (__INTERRUPT__)) == (__INTERRUPT__)) ? SET : RESET)
  
  /** @brief  Check 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 @ref I2C_FLAG_TXE     Transmit data register empty
    *            @arg @ref I2C_FLAG_TXIS    Transmit interrupt status
    *            @arg @ref I2C_FLAG_RXNE    Receive data register not empty
    *            @arg @ref I2C_FLAG_ADDR    Address matched (slave mode)
    *            @arg @ref I2C_FLAG_AF      Acknowledge failure received flag
    *            @arg @ref I2C_FLAG_STOPF   STOP detection flag
    *            @arg @ref I2C_FLAG_TC      Transfer complete (master mode)
    *            @arg @ref I2C_FLAG_TCR     Transfer complete reload
    *            @arg @ref I2C_FLAG_BERR    Bus error
    *            @arg @ref I2C_FLAG_ARLO    Arbitration lost
    *            @arg @ref I2C_FLAG_OVR     Overrun/Underrun
    *            @arg @ref I2C_FLAG_PECERR  PEC error in reception
    *            @arg @ref I2C_FLAG_TIMEOUT Timeout or Tlow detection flag
    *            @arg @ref I2C_FLAG_ALERT   SMBus alert
    *            @arg @ref I2C_FLAG_BUSY    Bus busy
    *            @arg @ref I2C_FLAG_DIR     Transfer direction (slave mode)
    *
    * @retval The new state of __FLAG__ (SET or RESET).
    */
  #define I2C_FLAG_MASK  (0x0001FFFFU)
  #define __HAL_I2C_GET_FLAG(__HANDLE__, __FLAG__) (((((__HANDLE__)->Instance->ISR) & (__FLAG__)) == (__FLAG__)) ? SET : RESET)
  
  /** @brief  Clear the I2C pending flags which are cleared by writing 1 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 @ref I2C_FLAG_TXE     Transmit data register empty
    *            @arg @ref I2C_FLAG_ADDR    Address matched (slave mode)
    *            @arg @ref I2C_FLAG_AF      Acknowledge failure received flag
    *            @arg @ref I2C_FLAG_STOPF   STOP detection flag
    *            @arg @ref I2C_FLAG_BERR    Bus error
    *            @arg @ref I2C_FLAG_ARLO    Arbitration lost
    *            @arg @ref I2C_FLAG_OVR     Overrun/Underrun
    *            @arg @ref I2C_FLAG_PECERR  PEC error in reception
    *            @arg @ref I2C_FLAG_TIMEOUT Timeout or Tlow detection flag
    *            @arg @ref I2C_FLAG_ALERT   SMBus alert
    *
    * @retval None
    */
  #define __HAL_I2C_CLEAR_FLAG(__HANDLE__, __FLAG__) (((__FLAG__) == I2C_FLAG_TXE) ? ((__HANDLE__)->Instance->ISR |= (__FLAG__)) \
                                                                                   : ((__HANDLE__)->Instance->ICR = (__FLAG__)))
  
  /** @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))
  
  /** @brief  Generate a Non-Acknowledge I2C peripheral in Slave mode.
    * @param  __HANDLE__ specifies the I2C Handle.
    * @retval None
    */
  #define __HAL_I2C_GENERATE_NACK(__HANDLE__)                     (SET_BIT((__HANDLE__)->Instance->CR2, I2C_CR2_NACK))
  /**
    * @}
    */
  
  /* Include I2C HAL Extended module */
  #include "stm32l0xx_hal_i2c_ex.h"
  
  /* 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 constants ---------------------------------------------------------*/
  /** @defgroup I2C_Private_Constants I2C Private Constants
    * @{
    */
  
  /**
    * @}
    */
  
  /* Private macros ------------------------------------------------------------*/
  /** @defgroup I2C_Private_Macro I2C Private Macros
    * @{
    */
  
  #define IS_I2C_ADDRESSING_MODE(MODE)    (((MODE) == I2C_ADDRESSINGMODE_7BIT) || \
                                           ((MODE) == I2C_ADDRESSINGMODE_10BIT))
  
  #define IS_I2C_DUAL_ADDRESS(ADDRESS)    (((ADDRESS) == I2C_DUALADDRESS_DISABLE) || \
                                           ((ADDRESS) == I2C_DUALADDRESS_ENABLE))
  
  #define IS_I2C_OWN_ADDRESS2_MASK(MASK)  (((MASK) == I2C_OA2_NOMASK)  || \
                                           ((MASK) == I2C_OA2_MASK01) || \
                                           ((MASK) == I2C_OA2_MASK02) || \
                                           ((MASK) == I2C_OA2_MASK03) || \
                                           ((MASK) == I2C_OA2_MASK04) || \
                                           ((MASK) == I2C_OA2_MASK05) || \
                                           ((MASK) == I2C_OA2_MASK06) || \
                                           ((MASK) == I2C_OA2_MASK07))
  
  #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_TRANSFER_MODE(MODE)          (((MODE) == I2C_RELOAD_MODE)   || \
                                           ((MODE) == I2C_AUTOEND_MODE) || \
                                           ((MODE) == I2C_SOFTEND_MODE))
  
  #define IS_TRANSFER_REQUEST(REQUEST)    (((REQUEST) == I2C_GENERATE_STOP)        || \
                                           ((REQUEST) == I2C_GENERATE_START_READ)  || \
                                           ((REQUEST) == I2C_GENERATE_START_WRITE) || \
                                           ((REQUEST) == I2C_NO_STARTSTOP))
  
  #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_RESET_CR2(__HANDLE__)                 ((__HANDLE__)->Instance->CR2 &= (uint32_t)~((uint32_t)(I2C_CR2_SADD | I2C_CR2_HEAD10R | I2C_CR2_NBYTES | I2C_CR2_RELOAD | I2C_CR2_RD_WRN)))
  
  #define I2C_GET_ADDR_MATCH(__HANDLE__)            ((uint16_t)(((__HANDLE__)->Instance->ISR & I2C_ISR_ADDCODE) >> 16U))
  #define I2C_GET_DIR(__HANDLE__)                   ((uint8_t)(((__HANDLE__)->Instance->ISR & I2C_ISR_DIR) >> 16U))
  #define I2C_GET_STOP_MODE(__HANDLE__)             ((__HANDLE__)->Instance->CR2 & I2C_CR2_AUTOEND)
  #define I2C_GET_OWN_ADDRESS1(__HANDLE__)          ((uint16_t)((__HANDLE__)->Instance->OAR1 & I2C_OAR1_OA1))
  #define I2C_GET_OWN_ADDRESS2(__HANDLE__)          ((uint16_t)((__HANDLE__)->Instance->OAR2 & I2C_OAR2_OA2))
  
  #define IS_I2C_OWN_ADDRESS1(ADDRESS1)             ((ADDRESS1) <= 0x000003FFU)
  #define IS_I2C_OWN_ADDRESS2(ADDRESS2)             ((ADDRESS2) <= (uint16_t)0x00FFU)
  
  #define I2C_MEM_ADD_MSB(__ADDRESS__)              ((uint8_t)((uint16_t)(((uint16_t)((__ADDRESS__) & (uint16_t)(0xFF00U))) >> 8U)))
  #define I2C_MEM_ADD_LSB(__ADDRESS__)              ((uint8_t)((uint16_t)((__ADDRESS__) & (uint16_t)(0x00FFU))))
  
  #define I2C_GENERATE_START(__ADDMODE__,__ADDRESS__) (((__ADDMODE__) == I2C_ADDRESSINGMODE_7BIT) ? (uint32_t)((((uint32_t)(__ADDRESS__) & (I2C_CR2_SADD)) | (I2C_CR2_START) | (I2C_CR2_AUTOEND)) & (~I2C_CR2_RD_WRN)) : \
                                                            (uint32_t)((((uint32_t)(__ADDRESS__) & (I2C_CR2_SADD)) | (I2C_CR2_ADD10) | (I2C_CR2_START)) & (~I2C_CR2_RD_WRN)))
  
  #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
    * @{
    */
  /* Private functions are defined in stm32l0xx_hal_i2c.c file */
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  #ifdef __cplusplus
  }
  #endif
  
  
  #endif /* STM32L0xx_HAL_I2C_H */
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  