text: /**
    ******************************************************************************
    * @file    stm32l4xx_hal_can.h
    * @author  MCD Application Team
    * @version V1.6.0
    * @date    28-October-2016
    * @brief   Header file of CAN HAL module.
    ******************************************************************************
    * @attention
    *
    * <h2><center>&copy; COPYRIGHT(c) 2016 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 __STM32L4xx_CAN_H
  #define __STM32L4xx_CAN_H
  
  #ifdef __cplusplus
   extern "C" {
  #endif
  
  /* Includes ------------------------------------------------------------------*/
  #include "stm32l4xx_hal_def.h"
  
  /** @addtogroup STM32L4xx_HAL_Driver
    * @{
    */
  
  /** @addtogroup CAN
    * @{
    */
  
  /* Exported types ------------------------------------------------------------*/
  /** @defgroup CAN_Exported_Types CAN Exported Types
    * @{
    */
  
  /**
    * @brief  HAL State structures definition
    */
  typedef enum
  {
    HAL_CAN_STATE_RESET             = 0x00,  /*!< CAN not yet initialized or disabled */
    HAL_CAN_STATE_READY             = 0x01,  /*!< CAN initialized and ready for use   */
    HAL_CAN_STATE_BUSY              = 0x02,  /*!< CAN process is ongoing              */
    HAL_CAN_STATE_BUSY_TX           = 0x12,  /*!< CAN process is ongoing              */
    HAL_CAN_STATE_BUSY_RX           = 0x22,  /*!< CAN process is ongoing              */
    HAL_CAN_STATE_BUSY_TX_RX        = 0x32,  /*!< CAN process is ongoing              */
    HAL_CAN_STATE_TIMEOUT           = 0x03,  /*!< Timeout state                       */
    HAL_CAN_STATE_ERROR             = 0x04   /*!< CAN error state                     */
  
  }HAL_CAN_StateTypeDef;
  
  /**
    * @brief  CAN init structure definition
    */
  typedef struct
  {
    uint32_t Prescaler;  /*!< Specifies the length of a time quantum.
                              This parameter must be a number between Min_Data = 1 and Max_Data = 1024 */
  
    uint32_t Mode;       /*!< Specifies the CAN operating mode.
                              This parameter can be a value of @ref CAN_operating_mode */
  
    uint32_t SJW;        /*!< Specifies the maximum number of time quanta
                              the CAN hardware is allowed to lengthen or
                              shorten a bit to perform resynchronization.
                              This parameter can be a value of @ref CAN_synchronisation_jump_width */
  
    uint32_t BS1;        /*!< Specifies the number of time quanta in Bit Segment 1.
                              This parameter can be a value of @ref CAN_time_quantum_in_bit_segment_1 */
  
    uint32_t BS2;        /*!< Specifies the number of time quanta in Bit Segment 2.
                              This parameter can be a value of @ref CAN_time_quantum_in_bit_segment_2 */
  
    uint32_t TTCM;       /*!< Enable or disable the time triggered communication mode.
                              This parameter can be set to ENABLE or DISABLE. */
  
    uint32_t ABOM;       /*!< Enable or disable the automatic bus-off management.
                              This parameter can be set to ENABLE or DISABLE */
  
    uint32_t AWUM;       /*!< Enable or disable the automatic wake-up mode.
                              This parameter can be set to ENABLE or DISABLE */
  
    uint32_t NART;       /*!< Enable or disable the non-automatic retransmission mode.
                              This parameter can be set to ENABLE or DISABLE */
  
    uint32_t RFLM;       /*!< Enable or disable the receive FIFO Locked mode.
                              This parameter can be set to ENABLE or DISABLE */
  
    uint32_t TXFP;       /*!< Enable or disable the transmit FIFO priority.
                              This parameter can be set to ENABLE or DISABLE */
  }CAN_InitTypeDef;
  
  /**
    * @brief  CAN filter configuration structure definition
    */
  typedef struct
  {
    uint32_t FilterIdHigh;          /*!< Specifies the filter identification number (MSBs for a 32-bit
                                         configuration, first one for a 16-bit configuration).
                                         This parameter must be a number between Min_Data = 0x0000 and Max_Data = 0xFFFF */
  
    uint32_t FilterIdLow;           /*!< Specifies the filter identification number (LSBs for a 32-bit
                                         configuration, second one for a 16-bit configuration).
                                         This parameter must be a number between Min_Data = 0x0000 and Max_Data = 0xFFFF */
  
    uint32_t FilterMaskIdHigh;      /*!< Specifies the filter mask number or identification number,
                                         according to the mode (MSBs for a 32-bit configuration,
                                         first one for a 16-bit configuration).
                                         This parameter must be a number between Min_Data = 0x0000 and Max_Data = 0xFFFF */
  
    uint32_t FilterMaskIdLow;       /*!< Specifies the filter mask number or identification number,
                                         according to the mode (LSBs for a 32-bit configuration,
                                         second one for a 16-bit configuration).
                                         This parameter must be a number between Min_Data = 0x0000 and Max_Data = 0xFFFF */
  
    uint32_t FilterFIFOAssignment;  /*!< Specifies the FIFO (0 or 1) which will be assigned to the filter.
                                         This parameter can be a value of @ref CAN_filter_FIFO */
  
    uint32_t FilterNumber;          /*!< Specifies the filter which will be initialized.
                                         This parameter must be a number between Min_Data = 0 and Max_Data = 27 */
  
    uint32_t FilterMode;            /*!< Specifies the filter mode to be initialized.
                                         This parameter can be a value of @ref CAN_filter_mode */
  
    uint32_t FilterScale;           /*!< Specifies the filter scale.
                                         This parameter can be a value of @ref CAN_filter_scale */
  
    uint32_t FilterActivation;      /*!< Enable or disable the filter.
                                         This parameter can be set to ENABLE or DISABLE */
  
    uint32_t BankNumber;            /*!< Select the start slave bank filter.
                                         This parameter must be a number between Min_Data = 0 and Max_Data = 28 */ 
  
  }CAN_FilterConfTypeDef;
  
  /**
    * @brief  CAN Tx message structure definition
    */
  typedef struct
  {
    uint32_t StdId;    /*!< Specifies the standard identifier.
                            This parameter must be a number between Min_Data = 0 and Max_Data = 0x7FF */
  
    uint32_t ExtId;    /*!< Specifies the extended identifier.
                            This parameter must be a number between Min_Data = 0 and Max_Data = 0x1FFFFFFF */
  
    uint32_t IDE;      /*!< Specifies the type of identifier for the message that will be transmitted.
                            This parameter can be a value of @ref CAN_identifier_type */
  
    uint32_t RTR;      /*!< Specifies the type of frame for the message that will be transmitted.
                            This parameter can be a value of @ref CAN_remote_transmission_request */
  
    uint32_t DLC;      /*!< Specifies the length of the frame that will be transmitted.
                            This parameter must be a number between Min_Data = 0 and Max_Data = 8 */
  
    uint8_t Data[8];   /*!< Contains the data to be transmitted.
                            This parameter must be a number between Min_Data = 0 and Max_Data = 0xFF */
  
  }CanTxMsgTypeDef;
  
  /**
    * @brief  CAN Rx message structure definition
    */
  typedef struct
  {
    uint32_t StdId;       /*!< Specifies the standard identifier.
                               This parameter must be a number between Min_Data = 0 and Max_Data = 0x7FF */
  
    uint32_t ExtId;       /*!< Specifies the extended identifier.
                               This parameter must be a number between Min_Data = 0 and Max_Data = 0x1FFFFFFF */
  
    uint32_t IDE;         /*!< Specifies the type of identifier for the message that will be received.
                               This parameter can be a value of @ref CAN_identifier_type */
  
    uint32_t RTR;         /*!< Specifies the type of frame for the received message.
                               This parameter can be a value of @ref CAN_remote_transmission_request */
  
    uint32_t DLC;         /*!< Specifies the length of the frame that will be received.
                               This parameter must be a number between Min_Data = 0 and Max_Data = 8 */
  
    uint8_t Data[8];      /*!< Contains the data to be received.
                               This parameter must be a number between Min_Data = 0 and Max_Data = 0xFF */
  
    uint32_t FMI;         /*!< Specifies the index of the filter the message stored in the mailbox passes through.
                               This parameter must be a number between Min_Data = 0 and Max_Data = 0xFF */
  
    uint32_t FIFONumber;  /*!< Specifies the receive FIFO number.
                               This parameter can be CAN_FIFO0 or CAN_FIFO1 */
  
  }CanRxMsgTypeDef;
  
  /**
    * @brief  CAN handle Structure definition
    */
  typedef struct
  {
    CAN_TypeDef                 *Instance;  /*!< Register base address          */
  
    CAN_InitTypeDef             Init;       /*!< CAN required parameters        */
  
    CanTxMsgTypeDef*            pTxMsg;     /*!< Pointer to transmit structure  */
  
    CanRxMsgTypeDef*            pRxMsg;     /*!< Pointer to reception structure */
  
    __IO HAL_CAN_StateTypeDef   State;      /*!< CAN communication state        */
  
    HAL_LockTypeDef             Lock;       /*!< CAN locking object             */
  
    __IO uint32_t               ErrorCode;  /*!< CAN Error code                 */
  
  }CAN_HandleTypeDef;
  
  /**
    * @}
    */
  
  /* Exported constants --------------------------------------------------------*/
  /** @defgroup CAN_Exported_Constants CAN Exported Constants
    * @{
    */
  
  /** @defgroup CAN_Error_Code CAN Error Code
    * @{
    */
  #define   HAL_CAN_ERROR_NONE        ((uint32_t)0x00000000)    /*!< No error             */
  #define   HAL_CAN_ERROR_EWG         ((uint32_t)0x00000001)    /*!< EWG error            */
  #define   HAL_CAN_ERROR_EPV         ((uint32_t)0x00000002)    /*!< EPV error            */
  #define   HAL_CAN_ERROR_BOF         ((uint32_t)0x00000004)    /*!< BOF error            */
  #define   HAL_CAN_ERROR_STF         ((uint32_t)0x00000008)    /*!< Stuff error          */
  #define   HAL_CAN_ERROR_FOR         ((uint32_t)0x00000010)    /*!< Form error           */
  #define   HAL_CAN_ERROR_ACK         ((uint32_t)0x00000020)    /*!< Acknowledgment error */
  #define   HAL_CAN_ERROR_BR          ((uint32_t)0x00000040)    /*!< Bit recessive        */
  #define   HAL_CAN_ERROR_BD          ((uint32_t)0x00000080)    /*!< LEC dominant         */
  #define   HAL_CAN_ERROR_CRC         ((uint32_t)0x00000100)   /*!< LEC transfer error   */
  /**
    * @}
    */
  
  /** @defgroup CAN_InitStatus CAN initialization Status
    * @{
    */
  #define CAN_INITSTATUS_FAILED       ((uint32_t)0x00000000)  /*!< CAN initialization failed */
  #define CAN_INITSTATUS_SUCCESS      ((uint32_t)0x00000001)  /*!< CAN initialization OK */
  /**
    * @}
    */
  
  /** @defgroup CAN_operating_mode CAN Operating Mode
    * @{
    */
  #define CAN_MODE_NORMAL             ((uint32_t)0x00000000)                     /*!< Normal mode   */
  #define CAN_MODE_LOOPBACK           ((uint32_t)CAN_BTR_LBKM)                   /*!< Loopback mode */
  #define CAN_MODE_SILENT             ((uint32_t)CAN_BTR_SILM)                   /*!< Silent mode   */
  #define CAN_MODE_SILENT_LOOPBACK    ((uint32_t)(CAN_BTR_LBKM | CAN_BTR_SILM))  /*!< Loopback combined with silent mode */
  /**
    * @}
    */
  
  
  /** @defgroup CAN_synchronisation_jump_width CAN Synchronization Jump Width
    * @{
    */
  #define CAN_SJW_1TQ                 ((uint32_t)0x00000000)     /*!< 1 time quantum */
  #define CAN_SJW_2TQ                 ((uint32_t)CAN_BTR_SJW_0)  /*!< 2 time quantum */
  #define CAN_SJW_3TQ                 ((uint32_t)CAN_BTR_SJW_1)  /*!< 3 time quantum */
  #define CAN_SJW_4TQ                 ((uint32_t)CAN_BTR_SJW)    /*!< 4 time quantum */
  /**
    * @}
    */
  
  /** @defgroup CAN_time_quantum_in_bit_segment_1 CAN Time Quantum in Bit Segment 1
    * @{
    */
  #define CAN_BS1_1TQ                 ((uint32_t)0x00000000)                                       /*!< 1 time quantum  */
  #define CAN_BS1_2TQ                 ((uint32_t)CAN_BTR_TS1_0)                                    /*!< 2 time quantum  */
  #define CAN_BS1_3TQ                 ((uint32_t)CAN_BTR_TS1_1)                                    /*!< 3 time quantum  */
  #define CAN_BS1_4TQ                 ((uint32_t)(CAN_BTR_TS1_1 | CAN_BTR_TS1_0))                  /*!< 4 time quantum  */
  #define CAN_BS1_5TQ                 ((uint32_t)CAN_BTR_TS1_2)                                    /*!< 5 time quantum  */
  #define CAN_BS1_6TQ                 ((uint32_t)(CAN_BTR_TS1_2 | CAN_BTR_TS1_0))                  /*!< 6 time quantum  */
  #define CAN_BS1_7TQ                 ((uint32_t)(CAN_BTR_TS1_2 | CAN_BTR_TS1_1))                  /*!< 7 time quantum  */
  #define CAN_BS1_8TQ                 ((uint32_t)(CAN_BTR_TS1_2 | CAN_BTR_TS1_1 | CAN_BTR_TS1_0))  /*!< 8 time quantum  */
  #define CAN_BS1_9TQ                 ((uint32_t)CAN_BTR_TS1_3)                                    /*!< 9 time quantum  */
  #define CAN_BS1_10TQ                ((uint32_t)(CAN_BTR_TS1_3 | CAN_BTR_TS1_0))                  /*!< 10 time quantum */
  #define CAN_BS1_11TQ                ((uint32_t)(CAN_BTR_TS1_3 | CAN_BTR_TS1_1))                  /*!< 11 time quantum */
  #define CAN_BS1_12TQ                ((uint32_t)(CAN_BTR_TS1_3 | CAN_BTR_TS1_1 | CAN_BTR_TS1_0))  /*!< 12 time quantum */
  #define CAN_BS1_13TQ                ((uint32_t)(CAN_BTR_TS1_3 | CAN_BTR_TS1_2))                  /*!< 13 time quantum */
  #define CAN_BS1_14TQ                ((uint32_t)(CAN_BTR_TS1_3 | CAN_BTR_TS1_2 | CAN_BTR_TS1_0))  /*!< 14 time quantum */
  #define CAN_BS1_15TQ                ((uint32_t)(CAN_BTR_TS1_3 | CAN_BTR_TS1_2 | CAN_BTR_TS1_1))  /*!< 15 time quantum */
  #define CAN_BS1_16TQ                ((uint32_t)CAN_BTR_TS1) /*!< 16 time quantum */
  /**
    * @}
    */
  
  /** @defgroup CAN_time_quantum_in_bit_segment_2 CAN Time Quantum in Bit Segment 2
    * @{
    */
  #define CAN_BS2_1TQ                 ((uint32_t)0x00000000)                       /*!< 1 time quantum */
  #define CAN_BS2_2TQ                 ((uint32_t)CAN_BTR_TS2_0)                    /*!< 2 time quantum */
  #define CAN_BS2_3TQ                 ((uint32_t)CAN_BTR_TS2_1)                    /*!< 3 time quantum */
  #define CAN_BS2_4TQ                 ((uint32_t)(CAN_BTR_TS2_1 | CAN_BTR_TS2_0))  /*!< 4 time quantum */
  #define CAN_BS2_5TQ                 ((uint32_t)CAN_BTR_TS2_2)                    /*!< 5 time quantum */
  #define CAN_BS2_6TQ                 ((uint32_t)(CAN_BTR_TS2_2 | CAN_BTR_TS2_0))  /*!< 6 time quantum */
  #define CAN_BS2_7TQ                 ((uint32_t)(CAN_BTR_TS2_2 | CAN_BTR_TS2_1))  /*!< 7 time quantum */
  #define CAN_BS2_8TQ                 ((uint32_t)CAN_BTR_TS2)                      /*!< 8 time quantum */
  /**
    * @}
    */
  
  /** @defgroup CAN_filter_mode CAN Filter Mode
    * @{
    */
  #define CAN_FILTERMODE_IDMASK       ((uint8_t)0x00)  /*!< Identifier mask mode */
  #define CAN_FILTERMODE_IDLIST       ((uint8_t)0x01)  /*!< Identifier list mode */
  /**
    * @}
    */
  
  /** @defgroup CAN_filter_scale CAN Filter Scale
    * @{
    */
  #define CAN_FILTERSCALE_16BIT       ((uint8_t)0x00)  /*!< Two 16-bit filters */
  #define CAN_FILTERSCALE_32BIT       ((uint8_t)0x01)  /*!< One 32-bit filter  */
  /**
    * @}
    */
  
  /** @defgroup CAN_filter_FIFO CAN Filter FIFO
    * @{
    */
  #define CAN_FILTER_FIFO0             ((uint8_t)0x00)  /*!< Filter FIFO 0 assignment for filter x */
  #define CAN_FILTER_FIFO1             ((uint8_t)0x01)  /*!< Filter FIFO 1 assignment for filter x */
  /**
    * @}
    */
  
  /** @defgroup CAN_identifier_type CAN Identifier Type
    * @{
    */
  #define CAN_ID_STD             ((uint32_t)0x00000000)  /*!< Standard Id */
  #define CAN_ID_EXT             ((uint32_t)0x00000004)  /*!< Extended Id */
  /**
    * @}
    */
  
  /** @defgroup CAN_remote_transmission_request CAN Remote Transmission Request
    * @{
    */
  #define CAN_RTR_DATA                ((uint32_t)0x00000000)  /*!< Data frame */
  #define CAN_RTR_REMOTE              ((uint32_t)0x00000002)  /*!< Remote frame */
  /**
    * @}
    */
  
  /** @defgroup CAN_receive_FIFO_number_constants CAN Receive FIFO Number
    * @{
    */
  #define CAN_FIFO0                   ((uint8_t)0x00)  /*!< CAN FIFO 0 used to receive */
  #define CAN_FIFO1                   ((uint8_t)0x01)  /*!< CAN FIFO 1 used to receive */
  /**
    * @}
    */
  
  /** @defgroup CAN_flags CAN Flags
    * @{
    */
  /* If the flag is 0x3XXXXXXX, it means that it can be used with CAN_GetFlagStatus()
     and CAN_ClearFlag() functions. */
  /* If the flag is 0x1XXXXXXX, it means that it can only be used with
     CAN_GetFlagStatus() function.  */
  
  /* Transmit Flags */
  #define CAN_FLAG_RQCP0             ((uint32_t)0x00000500)  /*!< Request MailBox0 flag         */
  #define CAN_FLAG_RQCP1             ((uint32_t)0x00000508)  /*!< Request MailBox1 flag         */
  #define CAN_FLAG_RQCP2             ((uint32_t)0x00000510)  /*!< Request MailBox2 flag         */
  #define CAN_FLAG_TXOK0             ((uint32_t)0x00000501)  /*!< Transmission OK MailBox0 flag */
  #define CAN_FLAG_TXOK1             ((uint32_t)0x00000509)  /*!< Transmission OK MailBox1 flag */
  #define CAN_FLAG_TXOK2             ((uint32_t)0x00000511)  /*!< Transmission OK MailBox2 flag */
  #define CAN_FLAG_TME0              ((uint32_t)0x0000051A)  /*!< Transmit mailbox 0 empty flag */
  #define CAN_FLAG_TME1              ((uint32_t)0x0000051B)  /*!< Transmit mailbox 0 empty flag */
  #define CAN_FLAG_TME2              ((uint32_t)0x0000051C)  /*!< Transmit mailbox 0 empty flag */
  
  /* Receive Flags */
  #define CAN_FLAG_FF0               ((uint32_t)0x00000203)  /*!< FIFO 0 Full flag    */
  #define CAN_FLAG_FOV0              ((uint32_t)0x00000204)  /*!< FIFO 0 Overrun flag */
  
  #define CAN_FLAG_FF1               ((uint32_t)0x00000403)  /*!< FIFO 1 Full flag    */
  #define CAN_FLAG_FOV1              ((uint32_t)0x00000404)  /*!< FIFO 1 Overrun flag */
  
  /* Operating Mode Flags */
  #define CAN_FLAG_WKU               ((uint32_t)0x00000103)  /*!< Wake up flag           */
  #define CAN_FLAG_SLAK              ((uint32_t)0x00000101)  /*!< Sleep acknowledge flag */
  #define CAN_FLAG_SLAKI             ((uint32_t)0x00000104)  /*!< Sleep acknowledge flag */
  /* @note When SLAK interrupt is disabled (SLKIE=0), no polling on SLAKI is possible.
           In this case the SLAK bit can be polled.*/
  
  /* Error Flags */
  #define CAN_FLAG_EWG               ((uint32_t)0x00000300)  /*!< Error warning flag   */
  #define CAN_FLAG_EPV               ((uint32_t)0x00000301)  /*!< Error passive flag   */
  #define CAN_FLAG_BOF               ((uint32_t)0x00000302)  /*!< Bus-Off flag         */
  /**
    * @}
    */
  
  /** @defgroup CAN_interrupts CAN Interrupts
    * @{
    */
  #define CAN_IT_TME                  ((uint32_t)CAN_IER_TMEIE)   /*!< Transmit mailbox empty interrupt */
  
  /* Receive Interrupts */
  #define CAN_IT_FMP0                 ((uint32_t)CAN_IER_FMPIE0)  /*!< FIFO 0 message pending interrupt */
  #define CAN_IT_FF0                  ((uint32_t)CAN_IER_FFIE0)   /*!< FIFO 0 full interrupt            */
  #define CAN_IT_FOV0                 ((uint32_t)CAN_IER_FOVIE0)  /*!< FIFO 0 overrun interrupt         */
  #define CAN_IT_FMP1                 ((uint32_t)CAN_IER_FMPIE1)  /*!< FIFO 1 message pending interrupt */
  #define CAN_IT_FF1                  ((uint32_t)CAN_IER_FFIE1)   /*!< FIFO 1 full interrupt            */
  #define CAN_IT_FOV1                 ((uint32_t)CAN_IER_FOVIE1)  /*!< FIFO 1 overrun interrupt         */
  
  /* Operating Mode Interrupts */
  #define CAN_IT_WKU                  ((uint32_t)CAN_IER_WKUIE)  /*!< Wake-up interrupt           */
  #define CAN_IT_SLK                  ((uint32_t)CAN_IER_SLKIE)  /*!< Sleep acknowledge interrupt */
  
  /* Error Interrupts */
  #define CAN_IT_EWG                  ((uint32_t)CAN_IER_EWGIE) /*!< Error warning interrupt   */
  #define CAN_IT_EPV                  ((uint32_t)CAN_IER_EPVIE) /*!< Error passive interrupt   */
  #define CAN_IT_BOF                  ((uint32_t)CAN_IER_BOFIE) /*!< Bus-off interrupt         */
  #define CAN_IT_LEC                  ((uint32_t)CAN_IER_LECIE) /*!< Last error code interrupt */
  #define CAN_IT_ERR                  ((uint32_t)CAN_IER_ERRIE) /*!< Error Interrupt           */
  
  /**
    * @}
    */
  
  /* Mailboxes definition */
  #define CAN_TXMAILBOX_0   ((uint8_t)0x00)
  #define CAN_TXMAILBOX_1   ((uint8_t)0x01)
  #define CAN_TXMAILBOX_2   ((uint8_t)0x02)
  
  /**
    * @}
    */
  
  /* Exported macros -----------------------------------------------------------*/
  /** @defgroup CAN_Exported_Macro CAN Exported Macros
    * @{
    */
  
  /** @brief  Reset CAN handle state.
    * @param  __HANDLE__: CAN handle.
    * @retval None
    */
  #define __HAL_CAN_RESET_HANDLE_STATE(__HANDLE__) ((__HANDLE__)->State = HAL_CAN_STATE_RESET)
  
  /**
    * @brief  Enable the specified CAN interrupt.
    * @param  __HANDLE__: CAN handle.
    * @param  __INTERRUPT__: CAN Interrupt.
    * @retval None
    */
  #define __HAL_CAN_ENABLE_IT(__HANDLE__, __INTERRUPT__) (((__HANDLE__)->Instance->IER) |= (__INTERRUPT__))
  
  /**
    * @brief  Disable the specified CAN interrupt.
    * @param  __HANDLE__: CAN handle.
    * @param  __INTERRUPT__: CAN Interrupt.
    * @retval None
    */
  #define __HAL_CAN_DISABLE_IT(__HANDLE__, __INTERRUPT__) (((__HANDLE__)->Instance->IER) &= ~(__INTERRUPT__))
  
  /**
    * @brief  Return the number of pending received messages.
    * @param  __HANDLE__: CAN handle.
    * @param  __FIFONUMBER__: Receive FIFO number, CAN_FIFO0 or CAN_FIFO1.
    * @retval The number of pending message.
    */
  #define __HAL_CAN_MSG_PENDING(__HANDLE__, __FIFONUMBER__) (((__FIFONUMBER__) == CAN_FIFO0)? \
  ((uint8_t)((__HANDLE__)->Instance->RF0R&(uint32_t)0x03)) : ((uint8_t)((__HANDLE__)->Instance->RF1R&(uint32_t)0x03)))
  
  /** @brief  Check whether the specified CAN flag is set or not.
    * @param  __HANDLE__: specifies the CAN Handle.
    * @param  __FLAG__: specifies the flag to check.
    *         This parameter can be one of the following values:
    *            @arg CAN_TSR_RQCP0: Request MailBox0 Flag
    *            @arg CAN_TSR_RQCP1: Request MailBox1 Flag
    *            @arg CAN_TSR_RQCP2: Request MailBox2 Flag
    *            @arg CAN_FLAG_TXOK0: Transmission OK MailBox0 Flag
    *            @arg CAN_FLAG_TXOK1: Transmission OK MailBox1 Flag
    *            @arg CAN_FLAG_TXOK2: Transmission OK MailBox2 Flag
    *            @arg CAN_FLAG_TME0: Transmit mailbox 0 empty Flag
    *            @arg CAN_FLAG_TME1: Transmit mailbox 1 empty Flag
    *            @arg CAN_FLAG_TME2: Transmit mailbox 2 empty Flag
    *            @arg CAN_FLAG_FMP0: FIFO 0 Message Pending Flag
    *            @arg CAN_FLAG_FF0: FIFO 0 Full Flag
    *            @arg CAN_FLAG_FOV0: FIFO 0 Overrun Flag
    *            @arg CAN_FLAG_FMP1: FIFO 1 Message Pending Flag
    *            @arg CAN_FLAG_FF1: FIFO 1 Full Flag
    *            @arg CAN_FLAG_FOV1: FIFO 1 Overrun Flag
    *            @arg CAN_FLAG_WKU: Wake up Flag
    *            @arg CAN_FLAG_SLAK: Sleep acknowledge Flag
    *            @arg CAN_FLAG_SLAKI: Sleep acknowledge Flag
    *            @arg CAN_FLAG_EWG: Error Warning Flag
    *            @arg CAN_FLAG_EPV: Error Passive Flag
    *            @arg CAN_FLAG_BOF: Bus-Off Flag
    * @retval The new state of __FLAG__ (TRUE or FALSE).
    */
  #define __HAL_CAN_GET_FLAG(__HANDLE__, __FLAG__) \
  ((((__FLAG__) >> 8) == 5)? ((((__HANDLE__)->Instance->TSR) & (1U << ((__FLAG__) & CAN_FLAG_MASK))) == (1U << ((__FLAG__) & CAN_FLAG_MASK))): \
   (((__FLAG__) >> 8) == 2)? ((((__HANDLE__)->Instance->RF0R) & (1U << ((__FLAG__) & CAN_FLAG_MASK))) == (1U << ((__FLAG__) & CAN_FLAG_MASK))): \
   (((__FLAG__) >> 8) == 4)? ((((__HANDLE__)->Instance->RF1R) & (1U << ((__FLAG__) & CAN_FLAG_MASK))) == (1U << ((__FLAG__) & CAN_FLAG_MASK))): \
   (((__FLAG__) >> 8) == 1)? ((((__HANDLE__)->Instance->MSR) & (1U << ((__FLAG__) & CAN_FLAG_MASK))) == (1U << ((__FLAG__) & CAN_FLAG_MASK))): \
   ((((__HANDLE__)->Instance->ESR) & (1U << ((__FLAG__) & CAN_FLAG_MASK))) == (1U << ((__FLAG__) & CAN_FLAG_MASK))))
  
  /** @brief  Clear the specified CAN pending flag.
    * @param  __HANDLE__: specifies the CAN Handle.
    * @param  __FLAG__: specifies the flag to check.
    *         This parameter can be one of the following values:
    *            @arg CAN_TSR_RQCP0: Request MailBox0 Flag
    *            @arg CAN_TSR_RQCP1: Request MailBox1 Flag
    *            @arg CAN_TSR_RQCP2: Request MailBox2 Flag
    *            @arg CAN_FLAG_TXOK0: Transmission OK MailBox0 Flag
    *            @arg CAN_FLAG_TXOK1: Transmission OK MailBox1 Flag
    *            @arg CAN_FLAG_TXOK2: Transmission OK MailBox2 Flag
    *            @arg CAN_FLAG_TME0: Transmit mailbox 0 empty Flag
    *            @arg CAN_FLAG_TME1: Transmit mailbox 1 empty Flag
    *            @arg CAN_FLAG_TME2: Transmit mailbox 2 empty Flag
    *            @arg CAN_FLAG_FMP0: FIFO 0 Message Pending Flag
    *            @arg CAN_FLAG_FF0: FIFO 0 Full Flag
    *            @arg CAN_FLAG_FOV0: FIFO 0 Overrun Flag
    *            @arg CAN_FLAG_FMP1: FIFO 1 Message Pending Flag
    *            @arg CAN_FLAG_FF1: FIFO 1 Full Flag
    *            @arg CAN_FLAG_FOV1: FIFO 1 Overrun Flag
    *            @arg CAN_FLAG_WKU: Wake up Flag
    *            @arg CAN_FLAG_SLAKI: Sleep acknowledge Flag
    * @retval The new state of __FLAG__ (TRUE or FALSE).
    */
  #define __HAL_CAN_CLEAR_FLAG(__HANDLE__, __FLAG__) \
  ((((__FLAG__) >> 8U) == 5)? (((__HANDLE__)->Instance->TSR) = (1U << ((__FLAG__) & CAN_FLAG_MASK))): \
   (((__FLAG__) >> 8U) == 2)? (((__HANDLE__)->Instance->RF0R) = (1U << ((__FLAG__) & CAN_FLAG_MASK))): \
   (((__FLAG__) >> 8U) == 4)? (((__HANDLE__)->Instance->RF1R) = (1U << ((__FLAG__) & CAN_FLAG_MASK))): \
   (((__FLAG__) >> 8U) == 1)? (((__HANDLE__)->Instance->MSR) = (1U << ((__FLAG__) & CAN_FLAG_MASK))): 0)
  
  
  /** @brief  Check whether the specified CAN interrupt source is enabled or not.
    * @param  __HANDLE__: specifies the CAN Handle.
    * @param  __INTERRUPT__: specifies the CAN interrupt source to check.
    *         This parameter can be one of the following values:
    *            @arg CAN_IT_TME: Transmit mailbox empty interrupt enable
    *            @arg CAN_IT_FMP0: FIFO0 message pending interrupt enable
    *            @arg CAN_IT_FMP1: FIFO1 message pending interrupt enable
    * @retval The new state of __IT__ (TRUE or FALSE).
    */
  #define __HAL_CAN_GET_IT_SOURCE(__HANDLE__, __INTERRUPT__) ((((__HANDLE__)->Instance->IER & (__INTERRUPT__)) == (__INTERRUPT__)) ? SET : RESET)
  
  /**
    * @brief  Check the transmission status of a CAN Frame.
    * @param  __HANDLE__: specifies the CAN Handle.
    * @param  __TRANSMITMAILBOX__: the number of the mailbox that is used for transmission.
    * @retval The new status of transmission  (TRUE or FALSE).
    */
  #define __HAL_CAN_TRANSMIT_STATUS(__HANDLE__, __TRANSMITMAILBOX__)\
  (((__TRANSMITMAILBOX__) == CAN_TXMAILBOX_0)? ((((__HANDLE__)->Instance->TSR) & (CAN_TSR_RQCP0 | CAN_TSR_TXOK0 | CAN_TSR_TME0)) == (CAN_TSR_RQCP0 | CAN_TSR_TXOK0 | CAN_TSR_TME0)) :\
   ((__TRANSMITMAILBOX__) == CAN_TXMAILBOX_1)? ((((__HANDLE__)->Instance->TSR) & (CAN_TSR_RQCP1 | CAN_TSR_TXOK1 | CAN_TSR_TME1)) == (CAN_TSR_RQCP1 | CAN_TSR_TXOK1 | CAN_TSR_TME1)) :\
   ((((__HANDLE__)->Instance->TSR) & (CAN_TSR_RQCP2 | CAN_TSR_TXOK2 | CAN_TSR_TME2)) == (CAN_TSR_RQCP2 | CAN_TSR_TXOK2 | CAN_TSR_TME2)))
  
  
  
  /**
    * @brief  Release the specified receive FIFO.
    * @param  __HANDLE__: CAN handle.
    * @param  __FIFONUMBER__: Receive FIFO number, CAN_FIFO0 or CAN_FIFO1.
    * @retval None
    */
  #define __HAL_CAN_FIFO_RELEASE(__HANDLE__, __FIFONUMBER__) (((__FIFONUMBER__) == CAN_FIFO0)? \
  ((__HANDLE__)->Instance->RF0R |= CAN_RF0R_RFOM0) : ((__HANDLE__)->Instance->RF1R |= CAN_RF1R_RFOM1)) 
  
  /**
    * @brief  Cancel a transmit request.
    * @param  __HANDLE__: specifies the CAN Handle.
    * @param  __TRANSMITMAILBOX__: the number of the mailbox that is used for transmission.
    * @retval None
    */
  #define __HAL_CAN_CANCEL_TRANSMIT(__HANDLE__, __TRANSMITMAILBOX__)\
  (((__TRANSMITMAILBOX__) == CAN_TXMAILBOX_0)? ((__HANDLE__)->Instance->TSR |= CAN_TSR_ABRQ0) :\
   ((__TRANSMITMAILBOX__) == CAN_TXMAILBOX_1)? ((__HANDLE__)->Instance->TSR |= CAN_TSR_ABRQ1) :\
   ((__HANDLE__)->Instance->TSR |= CAN_TSR_ABRQ2))
  
  /**
    * @brief  Enable or disable the DBG Freeze for CAN.
    * @param  __HANDLE__: specifies the CAN Handle.
    * @param  __NEWSTATE__: new state of the CAN peripheral. 
    *         This parameter can be: ENABLE (CAN reception/transmission is frozen
    *         during debug. Reception FIFO can still be accessed/controlled normally) 
    *         or DISABLE (CAN is working during debug).
    * @retval None
    */
  #define __HAL_CAN_DBG_FREEZE(__HANDLE__, __NEWSTATE__) (((__NEWSTATE__) == ENABLE)? \
  ((__HANDLE__)->Instance->MCR |= CAN_MCR_DBF) : ((__HANDLE__)->Instance->MCR &= ~CAN_MCR_DBF)) 
  
  /**
   * @}
   */  
   
  /* Exported functions --------------------------------------------------------*/  
  /** @addtogroup CAN_Exported_Functions CAN Exported Functions
    * @{
    */
    
  /** @defgroup CAN_Exported_Functions_Group1 Initialization and de-initialization functions 
   *  @brief    Initialization and Configuration functions 
   * @{
   */
  /* addtogroup and de-initialization functions *****************************/ 
  HAL_StatusTypeDef HAL_CAN_Init(CAN_HandleTypeDef* hcan);
  HAL_StatusTypeDef HAL_CAN_ConfigFilter(CAN_HandleTypeDef* hcan, CAN_FilterConfTypeDef* sFilterConfig);
  HAL_StatusTypeDef HAL_CAN_DeInit(CAN_HandleTypeDef* hcan);
  void HAL_CAN_MspInit(CAN_HandleTypeDef* hcan);
  void HAL_CAN_MspDeInit(CAN_HandleTypeDef* hcan);
  /**
   * @}
   */ 
   
  /** @addtogroup CAN_Exported_Functions_Group2 Input and Output operation functions
   *  @brief    I/O operation functions 
   * @{
   */
  /* IO operation functions *****************************************************/
  HAL_StatusTypeDef HAL_CAN_Transmit(CAN_HandleTypeDef *hcan, uint32_t Timeout);
  HAL_StatusTypeDef HAL_CAN_Transmit_IT(CAN_HandleTypeDef *hcan);
  HAL_StatusTypeDef HAL_CAN_Receive(CAN_HandleTypeDef *hcan, uint8_t FIFONumber, uint32_t Timeout);
  HAL_StatusTypeDef HAL_CAN_Receive_IT(CAN_HandleTypeDef *hcan, uint8_t FIFONumber);
  HAL_StatusTypeDef HAL_CAN_Sleep(CAN_HandleTypeDef *hcan);
  HAL_StatusTypeDef HAL_CAN_WakeUp(CAN_HandleTypeDef *hcan);
  void HAL_CAN_IRQHandler(CAN_HandleTypeDef* hcan);
  void HAL_CAN_TxCpltCallback(CAN_HandleTypeDef* hcan);
  void HAL_CAN_RxCpltCallback(CAN_HandleTypeDef* hcan);
  void HAL_CAN_ErrorCallback(CAN_HandleTypeDef *hcan);
  /**
   * @}
   */ 
   
  /** @addtogroup CAN_Exported_Functions_Group3 Peripheral State and Error functions
   *  @brief   CAN Peripheral State functions 
   * @{
   */
  /* Peripheral State and Error functions ***************************************/
  uint32_t HAL_CAN_GetError(CAN_HandleTypeDef *hcan);
  HAL_CAN_StateTypeDef HAL_CAN_GetState(CAN_HandleTypeDef* hcan);
  /**
   * @}
   */ 
  
  /**
   * @}
   */ 
  
  /* Private types -------------------------------------------------------------*/
  /* Private constants ---------------------------------------------------------*/
  /** @defgroup CAN_Private_Constants CAN Private Constants
    * @{
    */
  /** @defgroup CAN_transmit_constants CAN Transmit Constants
    * @{
    */
  #define CAN_TXSTATUS_NOMAILBOX      ((uint8_t)0x04)  /*!< CAN cell did not provide CAN_TxStatus_NoMailBox */
  /**
    * @}
    */
  #define CAN_FLAG_MASK     ((uint32_t)0x000000FF)
  
  
  /**
    * @}
    */
  
  /* Private macros ------------------------------------------------------------*/
  /** @defgroup CAN_Private_Macros CAN Private Macros
    * @{
    */
  
  #define IS_CAN_MODE(MODE) (((MODE) == CAN_MODE_NORMAL) || \
                             ((MODE) == CAN_MODE_LOOPBACK)|| \
                             ((MODE) == CAN_MODE_SILENT) || \
                             ((MODE) == CAN_MODE_SILENT_LOOPBACK))
  
  #define IS_CAN_SJW(SJW) (((SJW) == CAN_SJW_1TQ) || ((SJW) == CAN_SJW_2TQ)|| \
                           ((SJW) == CAN_SJW_3TQ) || ((SJW) == CAN_SJW_4TQ))
  
  #define IS_CAN_BS1(BS1) ((BS1) <= CAN_BS1_16TQ)
  
  #define IS_CAN_BS2(BS2) ((BS2) <= CAN_BS2_8TQ)
  
  #define IS_CAN_PRESCALER(PRESCALER) (((PRESCALER) >= 1) && ((PRESCALER) <= 1024))
  
  #define IS_CAN_FILTER_NUMBER(NUMBER) ((NUMBER) <= 27)
  
  #define IS_CAN_FILTER_MODE(MODE) (((MODE) == CAN_FILTERMODE_IDMASK) || \
                                    ((MODE) == CAN_FILTERMODE_IDLIST))
  
  #define IS_CAN_FILTER_SCALE(SCALE) (((SCALE) == CAN_FILTERSCALE_16BIT) || \
                                      ((SCALE) == CAN_FILTERSCALE_32BIT))
  
  #define IS_CAN_FILTER_FIFO(FIFO) (((FIFO) == CAN_FILTER_FIFO0) || \
                                    ((FIFO) == CAN_FILTER_FIFO1))
  
  #define IS_CAN_BANKNUMBER(BANKNUMBER) ((BANKNUMBER) <= 28)
  
  #define IS_CAN_TRANSMITMAILBOX(TRANSMITMAILBOX) ((TRANSMITMAILBOX) <= ((uint8_t)0x02))
  
  #define IS_CAN_STDID(STDID)   ((STDID) <= ((uint32_t)0x7FF))
  
  #define IS_CAN_EXTID(EXTID)   ((EXTID) <= ((uint32_t)0x1FFFFFFF))
  
  #define IS_CAN_DLC(DLC)       ((DLC) <= ((uint8_t)0x08))
  
  #define IS_CAN_IDTYPE(IDTYPE)  (((IDTYPE) == CAN_ID_STD) || \
                                  ((IDTYPE) == CAN_ID_EXT))
  
  #define IS_CAN_RTR(RTR) (((RTR) == CAN_RTR_DATA) || ((RTR) == CAN_RTR_REMOTE))
  
  #define IS_CAN_FIFO(FIFO) (((FIFO) == CAN_FIFO0) || ((FIFO) == CAN_FIFO1))
  
  /**
    * @}
    */
  
  /* Private functions ---------------------------------------------------------*/
  
  /**
    * @}
    */
  
  /**
    * @}
    */
  
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* __STM32L4xx_CAN_H */
  
  
  /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
  