CAN 29-bit extended identifier bit definitions and frame type codes. More...

Macros
#define	RESERVED_TOP_BIT 0x10000000
	Reserved bit in CAN identifier - must always be 0.

#define	CAN_OPENLCB_MSG 0x08000000
	OpenLCB message indicator - bit 27 set means this is an OpenLCB message, clear means CAN control frame.

#define	MASK_CAN_FRAME_SEQUENCE_NUMBER 0x07000000
	Mask for frame sequence number bits (26-24) in CAN control frames.

#define	MASK_CAN_FRAME_TYPE MASK_CAN_FRAME_SEQUENCE_NUMBER
	Mask for frame type bits (26-24) in OpenLCB messages - same bits as sequence number.

#define	MASK_CAN_VARIABLE_FIELD 0x00FFF000
	Mask for variable field (bits 23-12) containing MTI in OpenLCB messages.

#define	OPENLCB_MESSAGE_STANDARD_FRAME_TYPE 0x01000000
	Frame type: Global or addressed OpenLCB message.

#define	CAN_FRAME_TYPE_DATAGRAM_ONLY 0x02000000
	Frame type: Datagram complete in single frame.

#define	CAN_FRAME_TYPE_DATAGRAM_FIRST 0x03000000
	Frame type: First frame of multi-frame datagram.

#define	CAN_FRAME_TYPE_DATAGRAM_MIDDLE 0x04000000
	Frame type: Middle frame of multi-frame datagram.

#define	CAN_FRAME_TYPE_DATAGRAM_FINAL 0x05000000
	Frame type: Final frame of multi-frame datagram.

#define	CAN_FRAME_TYPE_RESERVED 0x06000000
	Frame type: Reserved for future use.

#define	CAN_FRAME_TYPE_STREAM 0x07000000
	Frame type: Stream data frame.

Detailed Description

CAN 29-bit extended identifier bit definitions and frame type codes.

Macro Definition Documentation

◆ RESERVED_TOP_BIT

#define RESERVED_TOP_BIT 0x10000000

Reserved bit in CAN identifier - must always be 0.

◆ CAN_OPENLCB_MSG

#define CAN_OPENLCB_MSG 0x08000000

OpenLCB message indicator - bit 27 set means this is an OpenLCB message, clear means CAN control frame.

◆ MASK_CAN_FRAME_SEQUENCE_NUMBER

#define MASK_CAN_FRAME_SEQUENCE_NUMBER 0x07000000

Mask for frame sequence number bits (26-24) in CAN control frames.

◆ MASK_CAN_FRAME_TYPE

#define MASK_CAN_FRAME_TYPE MASK_CAN_FRAME_SEQUENCE_NUMBER

Mask for frame type bits (26-24) in OpenLCB messages - same bits as sequence number.

◆ MASK_CAN_VARIABLE_FIELD

#define MASK_CAN_VARIABLE_FIELD 0x00FFF000

Mask for variable field (bits 23-12) containing MTI in OpenLCB messages.

◆ OPENLCB_MESSAGE_STANDARD_FRAME_TYPE

#define OPENLCB_MESSAGE_STANDARD_FRAME_TYPE 0x01000000

Frame type: Global or addressed OpenLCB message.

◆ CAN_FRAME_TYPE_DATAGRAM_ONLY

#define CAN_FRAME_TYPE_DATAGRAM_ONLY 0x02000000

Frame type: Datagram complete in single frame.

◆ CAN_FRAME_TYPE_DATAGRAM_FIRST

#define CAN_FRAME_TYPE_DATAGRAM_FIRST 0x03000000

Frame type: First frame of multi-frame datagram.

◆ CAN_FRAME_TYPE_DATAGRAM_MIDDLE

#define CAN_FRAME_TYPE_DATAGRAM_MIDDLE 0x04000000

Frame type: Middle frame of multi-frame datagram.

◆ CAN_FRAME_TYPE_DATAGRAM_FINAL

#define CAN_FRAME_TYPE_DATAGRAM_FINAL 0x05000000

Frame type: Final frame of multi-frame datagram.

◆ CAN_FRAME_TYPE_RESERVED

#define CAN_FRAME_TYPE_RESERVED 0x06000000

Frame type: Reserved for future use.

◆ CAN_FRAME_TYPE_STREAM

#define CAN_FRAME_TYPE_STREAM 0x07000000

Frame type: Stream data frame.

Macros