CAN Data Structures

typedef struct
{
    DWORD ID;                // ID for CAN Bus Message Buffer If you use  standard  format ID must 11 bit
                             // use extended frame ID can be 29 bit
    WORD  wLen;              // Message Buffer Length ,the max length is 8 bytes
    BYTE byIndex;            // CAN Bus Message Buffer index for RX or TX
    BYTE byRW;               // Read = CAN_READ or Write = CAN_WRITE
    CAN_FRAME_FORMAT format; // Frame format is standard or Frame format is standard
    CAN_RTR_FORMAT   frame;  // Indicate the trimission frame is Remote frame or Data frame
    WORD  timestamp;         // Message Buffer Length ,the max length is 8 bytes
    BYTE  PRIO;              // the transmission priority.
    DWORD AcceptMask;        // Acceptance Mask for Buffer  
    LPINT lpiResult;         // Contains the result of last operation
    DWORD iTimeout;          //
    DWORD status;            // Status information
    BYTE  data[8];
} CAN_PACKET, *PCAN_PACKET;

typedef struct
{
    INT32 iNumPackets;          // Numer of mailboxes to be handeled by CANTransfer issued 
                                // with this transferblock (1 for MX28)               
    CAN_PACKET CANPackets[64];  // Pointer to all mailboxes to be transferred. 
                                // Content will be transferred to/from mailbox
}   CAN_TRANSFER_BLOCK, *PCAN_TRANSFER_BLOCK;

// CAN Transfer Block
typedef struct
{
	INT32 iNumPackets;
    CAN_PACKET CANPackets[64];  // may be modified to your needs
    INT32 iTransferStatus;
} CAN_TRANSFER_BLOCK, *PCAN_TRANSFER_BLOCK;

#define PACKET_STATUS_OVRRUN_MB  0x0100
#define PACKET_STATUS_OVRRUN_RAM 0x0200
#define PACKET_STATUS_READY      0x0080
#define PACKET_STATUS_OVRRUN     0x0040
#define PACKET_STATUS_NOTVALID   0x0020

typedef struct 
{
	DWORD ReceivedPackets;
	DWORD DeliveredPakets;
	DWORD GlobalMessageCount;
	DWORD MessagesDropped;
	DWORD LastControllerStatus;
	DWORD ErrorCounter;

} CAN_STATUS, *PCAN_STATUS;