/********************************** (C) COPYRIGHT  *******************************
* File Name          : ch32f20x_can.h
* Author             : WCH
* Version            : V1.0.0
* Date               : 2021/08/08
* Description        : This file contains all the functions prototypes for the 
*                      CAN firmware library.
* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
* SPDX-License-Identifier: Apache-2.0
*******************************************************************************/ 
#ifndef __CH32F20x_CAN_H
#define __CH32F20x_CAN_H

#ifdef __cplusplus
 extern "C" {
#endif

#include "ch32f20x.h"

/* CAN init structure definition */
typedef struct
{
  uint16_t CAN_Prescaler;   /* Specifies the length of a time quantum. 
                               It ranges from 1 to 1024. */
  
  uint8_t CAN_Mode;         /* Specifies the CAN operating mode.
                               This parameter can be a value of 
                              @ref CAN_operating_mode */

  uint8_t CAN_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 */

  uint8_t CAN_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 */

  uint8_t CAN_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 */
  
  FunctionalState CAN_TTCM; /* Enable or disable the time triggered 
                               communication mode. This parameter can be set 
                               either to ENABLE or DISABLE. */
  
  FunctionalState CAN_ABOM;  /* Enable or disable the automatic bus-off 
                                management. This parameter can be set either 
                                to ENABLE or DISABLE. */

  FunctionalState CAN_AWUM;  /* Enable or disable the automatic wake-up mode. 
                                This parameter can be set either to ENABLE or 
                                DISABLE. */

  FunctionalState CAN_NART;  /* Enable or disable the no-automatic 
                                retransmission mode. This parameter can be 
                                set either to ENABLE or DISABLE. */

  FunctionalState CAN_RFLM;  /* Enable or disable the Receive FIFO Locked mode.
                                This parameter can be set either to ENABLE 
                                or DISABLE. */

  FunctionalState CAN_TXFP;  /* Enable or disable the transmit FIFO priority.
                                This parameter can be set either to ENABLE 
                                or DISABLE. */
} CAN_InitTypeDef;

/* CAN filter init structure definition */
typedef struct
{
  uint16_t CAN_FilterIdHigh;         /* Specifies the filter identification number (MSBs for a 32-bit
                                            configuration, first one for a 16-bit configuration).
                                            This parameter can be a value between 0x0000 and 0xFFFF */

  uint16_t CAN_FilterIdLow;          /* Specifies the filter identification number (LSBs for a 32-bit
                                            configuration, second one for a 16-bit configuration).
                                            This parameter can be a value between 0x0000 and 0xFFFF */

  uint16_t CAN_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 can be a value between 0x0000 and 0xFFFF */

  uint16_t CAN_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 can be a value between 0x0000 and 0xFFFF */

  uint16_t CAN_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 */
  
  uint8_t CAN_FilterNumber;          /* Specifies the filter which will be initialized. It ranges from 0 to 13. */

  uint8_t CAN_FilterMode;            /* Specifies the filter mode to be initialized.
                                            This parameter can be a value of @ref CAN_filter_mode */

  uint8_t CAN_FilterScale;           /* Specifies the filter scale.
                                            This parameter can be a value of @ref CAN_filter_scale */

  FunctionalState CAN_FilterActivation; /* Enable or disable the filter.
                                            This parameter can be set either to ENABLE or DISABLE. */
} CAN_FilterInitTypeDef;

/* CAN Tx message structure definition */
typedef struct
{
  uint32_t StdId;  /* Specifies the standard identifier.
                      This parameter can be a value between 0 to 0x7FF. */

  uint32_t ExtId;  /* Specifies the extended identifier.
                      This parameter can be a value between 0 to 0x1FFFFFFF. */

  uint8_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 */

  uint8_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 */

  uint8_t DLC;     /* Specifies the length of the frame that will be 
                      transmitted. This parameter can be a value between 
                      0 to 8 */

  uint8_t Data[8]; /* Contains the data to be transmitted. It ranges from 0 
                       to 0xFF. */
} CanTxMsg;

/* CAN Rx message structure definition  */
typedef struct
{
  uint32_t StdId;  /* Specifies the standard identifier.
                      This parameter can be a value between 0 to 0x7FF. */

  uint32_t ExtId;  /* Specifies the extended identifier.
                      This parameter can be a value between 0 to 0x1FFFFFFF. */

  uint8_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 */

  uint8_t RTR;     /* Specifies the type of frame for the received message.
                      This parameter can be a value of 
                      @ref CAN_remote_transmission_request */

  uint8_t DLC;     /* Specifies the length of the frame that will be received.
                      This parameter can be a value between 0 to 8 */

  uint8_t Data[8]; /* Contains the data to be received. It ranges from 0 to 
                      0xFF. */

  uint8_t FMI;     /* Specifies the index of the filter the message stored in 
                      the mailbox passes through. This parameter can be a 
                      value between 0 to 0xFF */
} CanRxMsg;

/* CAN_sleep_constants */
#define CAN_InitStatus_Failed              ((uint8_t)0x00) /* CAN initialization failed */
#define CAN_InitStatus_Success             ((uint8_t)0x01) /* CAN initialization OK */

/* CAN_Mode */
#define CAN_Mode_Normal                    ((uint8_t)0x00)  /* normal mode */
#define CAN_Mode_LoopBack                  ((uint8_t)0x01)  /* loopback mode */
#define CAN_Mode_Silent                    ((uint8_t)0x02)  /* silent mode */
#define CAN_Mode_Silent_LoopBack           ((uint8_t)0x03)  /* loopback combined with silent mode */

/* CAN_Operating_Mode */
#define CAN_OperatingMode_Initialization   ((uint8_t)0x00) /* Initialization mode */
#define CAN_OperatingMode_Normal           ((uint8_t)0x01) /* Normal mode */
#define CAN_OperatingMode_Sleep            ((uint8_t)0x02) /* sleep mode */

/* CAN_Mode_Status */
#define CAN_ModeStatus_Failed              ((uint8_t)0x00)                /* CAN entering the specific mode failed */
#define CAN_ModeStatus_Success             ((uint8_t)!CAN_ModeStatus_Failed)   /* CAN entering the specific mode Succeed */

/* CAN_synchronisation_jump_width */
#define CAN_SJW_1tq                        ((uint8_t)0x00)  /* 1 time quantum */
#define CAN_SJW_2tq                        ((uint8_t)0x01)  /* 2 time quantum */
#define CAN_SJW_3tq                        ((uint8_t)0x02)  /* 3 time quantum */
#define CAN_SJW_4tq                        ((uint8_t)0x03)  /* 4 time quantum */

/* CAN_time_quantum_in_bit_segment_1 */
#define CAN_BS1_1tq                        ((uint8_t)0x00)  /* 1 time quantum */
#define CAN_BS1_2tq                        ((uint8_t)0x01)  /* 2 time quantum */
#define CAN_BS1_3tq                        ((uint8_t)0x02)  /* 3 time quantum */
#define CAN_BS1_4tq                        ((uint8_t)0x03)  /* 4 time quantum */
#define CAN_BS1_5tq                        ((uint8_t)0x04)  /* 5 time quantum */
#define CAN_BS1_6tq                        ((uint8_t)0x05)  /* 6 time quantum */
#define CAN_BS1_7tq                        ((uint8_t)0x06)  /* 7 time quantum */
#define CAN_BS1_8tq                        ((uint8_t)0x07)  /* 8 time quantum */
#define CAN_BS1_9tq                        ((uint8_t)0x08)  /* 9 time quantum */
#define CAN_BS1_10tq                       ((uint8_t)0x09)  /* 10 time quantum */
#define CAN_BS1_11tq                       ((uint8_t)0x0A)  /* 11 time quantum */
#define CAN_BS1_12tq                       ((uint8_t)0x0B)  /* 12 time quantum */
#define CAN_BS1_13tq                       ((uint8_t)0x0C)  /* 13 time quantum */
#define CAN_BS1_14tq                       ((uint8_t)0x0D)  /* 14 time quantum */
#define CAN_BS1_15tq                       ((uint8_t)0x0E)  /* 15 time quantum */
#define CAN_BS1_16tq                       ((uint8_t)0x0F)  /* 16 time quantum */

/* CAN_time_quantum_in_bit_segment_2 */
#define CAN_BS2_1tq                        ((uint8_t)0x00)  /* 1 time quantum */
#define CAN_BS2_2tq                        ((uint8_t)0x01)  /* 2 time quantum */
#define CAN_BS2_3tq                        ((uint8_t)0x02)  /* 3 time quantum */
#define CAN_BS2_4tq                        ((uint8_t)0x03)  /* 4 time quantum */
#define CAN_BS2_5tq                        ((uint8_t)0x04)  /* 5 time quantum */
#define CAN_BS2_6tq                        ((uint8_t)0x05)  /* 6 time quantum */
#define CAN_BS2_7tq                        ((uint8_t)0x06)  /* 7 time quantum */
#define CAN_BS2_8tq                        ((uint8_t)0x07)  /* 8 time quantum */

/* CAN_filter_mode */
#define CAN_FilterMode_IdMask              ((uint8_t)0x00)  /* identifier/mask mode */
#define CAN_FilterMode_IdList              ((uint8_t)0x01)  /* identifier list mode */

/* 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 */

/* 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 */

/* CAN_identifier_type */
#define CAN_Id_Standard                    ((uint32_t)0x00000000)  /* Standard Id */
#define CAN_Id_Extended                    ((uint32_t)0x00000004)  /* Extended Id */

/* CAN_remote_transmission_request */
#define CAN_RTR_Data                       ((uint32_t)0x00000000)  /* Data frame */
#define CAN_RTR_Remote                     ((uint32_t)0x00000002)  /* Remote frame */

/* CAN_transmit_constants */
#define CAN_TxStatus_Failed                ((uint8_t)0x00)/* CAN transmission failed */
#define CAN_TxStatus_Ok                    ((uint8_t)0x01) /* CAN transmission succeeded */
#define CAN_TxStatus_Pending               ((uint8_t)0x02) /* CAN transmission pending */
#define CAN_TxStatus_NoMailBox             ((uint8_t)0x04) /* CAN cell did not provide an empty mailbox */

/* CAN_receive_FIFO_number_constants */
#define CAN_FIFO0                          ((uint8_t)0x00) /* CAN FIFO 0 used to receive */
#define CAN_FIFO1                          ((uint8_t)0x01) /* CAN FIFO 1 used to receive */

/* CAN_sleep_constants */
#define CAN_Sleep_Failed                   ((uint8_t)0x00) /* CAN did not enter the sleep mode */
#define CAN_Sleep_Ok                       ((uint8_t)0x01) /* CAN entered the sleep mode */

/* CAN_wake_up_constants */
#define CAN_WakeUp_Failed                  ((uint8_t)0x00) /* CAN did not leave the sleep mode */
#define CAN_WakeUp_Ok                      ((uint8_t)0x01) /* CAN leaved the sleep mode */
 
/* CAN_Error_Code_constants */                                                               
#define CAN_ErrorCode_NoErr                ((uint8_t)0x00) /* No Error */ 
#define	CAN_ErrorCode_StuffErr             ((uint8_t)0x10) /* Stuff Error */ 
#define	CAN_ErrorCode_FormErr              ((uint8_t)0x20) /* Form Error */ 
#define	CAN_ErrorCode_ACKErr               ((uint8_t)0x30) /* Acknowledgment Error */ 
#define	CAN_ErrorCode_BitRecessiveErr      ((uint8_t)0x40) /* Bit Recessive Error */ 
#define	CAN_ErrorCode_BitDominantErr       ((uint8_t)0x50) /* Bit Dominant Error */ 
#define	CAN_ErrorCode_CRCErr               ((uint8_t)0x60) /* CRC Error  */ 
#define	CAN_ErrorCode_SoftwareSetErr       ((uint8_t)0x70) /* Software Set Error */ 


/* CAN_flags */
/* Transmit Flags */
#define CAN_FLAG_RQCP0                     ((uint32_t)0x38000001) /* Request MailBox0 Flag */
#define CAN_FLAG_RQCP1                     ((uint32_t)0x38000100) /* Request MailBox1 Flag */
#define CAN_FLAG_RQCP2                     ((uint32_t)0x38010000) /* Request MailBox2 Flag */

/* Receive Flags */ 
#define CAN_FLAG_FMP0                      ((uint32_t)0x12000003) /* FIFO 0 Message Pending Flag */
#define CAN_FLAG_FF0                       ((uint32_t)0x32000008) /* FIFO 0 Full Flag            */
#define CAN_FLAG_FOV0                      ((uint32_t)0x32000010) /* FIFO 0 Overrun Flag         */
#define CAN_FLAG_FMP1                      ((uint32_t)0x14000003) /* FIFO 1 Message Pending Flag */
#define CAN_FLAG_FF1                       ((uint32_t)0x34000008) /* FIFO 1 Full Flag            */
#define CAN_FLAG_FOV1                      ((uint32_t)0x34000010) /* FIFO 1 Overrun Flag         */

/* Operating Mode Flags */
#define CAN_FLAG_WKU                       ((uint32_t)0x31000008) /* Wake up Flag */
#define CAN_FLAG_SLAK                      ((uint32_t)0x31000012) /* Sleep acknowledge Flag */

/* Error Flags */
#define CAN_FLAG_EWG                       ((uint32_t)0x10F00001) /* Error Warning Flag   */
#define CAN_FLAG_EPV                       ((uint32_t)0x10F00002) /* Error Passive Flag   */
#define CAN_FLAG_BOF                       ((uint32_t)0x10F00004) /* Bus-Off Flag         */
#define CAN_FLAG_LEC                       ((uint32_t)0x30F00070) /* Last error code Flag */


/* CAN_interrupts */
#define CAN_IT_TME                         ((uint32_t)0x00000001) /* Transmit mailbox empty Interrupt*/

/* Receive Interrupts */
#define CAN_IT_FMP0                        ((uint32_t)0x00000002) /* FIFO 0 message pending Interrupt*/
#define CAN_IT_FF0                         ((uint32_t)0x00000004) /* FIFO 0 full Interrupt*/
#define CAN_IT_FOV0                        ((uint32_t)0x00000008) /* FIFO 0 overrun Interrupt*/
#define CAN_IT_FMP1                        ((uint32_t)0x00000010) /* FIFO 1 message pending Interrupt*/
#define CAN_IT_FF1                         ((uint32_t)0x00000020) /* FIFO 1 full Interrupt*/
#define CAN_IT_FOV1                        ((uint32_t)0x00000040) /* FIFO 1 overrun Interrupt*/

/* Operating Mode Interrupts */
#define CAN_IT_WKU                         ((uint32_t)0x00010000) /* Wake-up Interrupt*/
#define CAN_IT_SLK                         ((uint32_t)0x00020000) /* Sleep acknowledge Interrupt*/

/* Error Interrupts */
#define CAN_IT_EWG                         ((uint32_t)0x00000100) /* Error warning Interrupt*/
#define CAN_IT_EPV                         ((uint32_t)0x00000200) /* Error passive Interrupt*/
#define CAN_IT_BOF                         ((uint32_t)0x00000400) /* Bus-off Interrupt*/
#define CAN_IT_LEC                         ((uint32_t)0x00000800) /* Last error code Interrupt*/
#define CAN_IT_ERR                         ((uint32_t)0x00008000) /* Error Interrupt*/

/* Flags named as Interrupts : kept only for FW compatibility */
#define CAN_IT_RQCP0    CAN_IT_TME
#define CAN_IT_RQCP1    CAN_IT_TME
#define CAN_IT_RQCP2    CAN_IT_TME

/* CAN_Legacy */
#define CANINITFAILED               CAN_InitStatus_Failed
#define CANINITOK                   CAN_InitStatus_Success
#define CAN_FilterFIFO0             CAN_Filter_FIFO0
#define CAN_FilterFIFO1             CAN_Filter_FIFO1
#define CAN_ID_STD                  CAN_Id_Standard           
#define CAN_ID_EXT                  CAN_Id_Extended
#define CAN_RTR_DATA                CAN_RTR_Data         
#define CAN_RTR_REMOTE              CAN_RTR_Remote
#define CANTXFAILE                  CAN_TxStatus_Failed
#define CANTXOK                     CAN_TxStatus_Ok
#define CANTXPENDING                CAN_TxStatus_Pending
#define CAN_NO_MB                   CAN_TxStatus_NoMailBox
#define CANSLEEPFAILED              CAN_Sleep_Failed
#define CANSLEEPOK                  CAN_Sleep_Ok
#define CANWAKEUPFAILED             CAN_WakeUp_Failed        
#define CANWAKEUPOK                 CAN_WakeUp_Ok        


void CAN_DeInit(CAN_TypeDef* CANx); 
uint8_t CAN_Init(CAN_TypeDef* CANx, CAN_InitTypeDef* CAN_InitStruct);
void CAN_FilterInit(CAN_FilterInitTypeDef* CAN_FilterInitStruct);
void CAN_StructInit(CAN_InitTypeDef* CAN_InitStruct);
void CAN_SlaveStartBank(uint8_t CAN_BankNumber); 
void CAN_DBGFreeze(CAN_TypeDef* CANx, FunctionalState NewState);
void CAN_TTComModeCmd(CAN_TypeDef* CANx, FunctionalState NewState);
uint8_t CAN_Transmit(CAN_TypeDef* CANx, CanTxMsg* TxMessage);
uint8_t CAN_TransmitStatus(CAN_TypeDef* CANx, uint8_t TransmitMailbox);
void CAN_CancelTransmit(CAN_TypeDef* CANx, uint8_t Mailbox);
void CAN_Receive(CAN_TypeDef* CANx, uint8_t FIFONumber, CanRxMsg* RxMessage);
void CAN_FIFORelease(CAN_TypeDef* CANx, uint8_t FIFONumber);
uint8_t CAN_MessagePending(CAN_TypeDef* CANx, uint8_t FIFONumber);
uint8_t CAN_OperatingModeRequest(CAN_TypeDef* CANx, uint8_t CAN_OperatingMode);
uint8_t CAN_Sleep(CAN_TypeDef* CANx);
uint8_t CAN_WakeUp(CAN_TypeDef* CANx);
uint8_t CAN_GetLastErrorCode(CAN_TypeDef* CANx);
uint8_t CAN_GetReceiveErrorCounter(CAN_TypeDef* CANx);
uint8_t CAN_GetLSBTransmitErrorCounter(CAN_TypeDef* CANx);
void CAN_ITConfig(CAN_TypeDef* CANx, uint32_t CAN_IT, FunctionalState NewState);
FlagStatus CAN_GetFlagStatus(CAN_TypeDef* CANx, uint32_t CAN_FLAG);
void CAN_ClearFlag(CAN_TypeDef* CANx, uint32_t CAN_FLAG);
ITStatus CAN_GetITStatus(CAN_TypeDef* CANx, uint32_t CAN_IT);
void CAN_ClearITPendingBit(CAN_TypeDef* CANx, uint32_t CAN_IT);

#ifdef __cplusplus
}
#endif

#endif 





