ABL electronic PIC Microcontrollers PIC18 User Manual

CAN_RX_MSG_FLAGS

are flags related to reception of CAN message. If a particular

bit is set; corresponding meaning is TRUE or else it will be FALSE.

#define CAN_RX_FILTER_BITS

0x07

// Use it to access filter bits

#define CAN_RX_FILTER_1

0x00

#define CAN_RX_FILTER_2

0x01

#define CAN_RX_FILTER_3

0x02

#define CAN_RX_FILTER_4

0x03

#define CAN_RX_FILTER_5

0x04

#define CAN_RX_FILTER_6

0x05

#define CAN_RX_OVERFLOW

0x08

// Set if Overflowed; else clear

#define CAN_RX_INVALID_MSG

0x10

// Set if invalid; else clear

#define CAN_RX_XTD_FRAME

0x20

// Set if XTD msg; else clear

#define CAN_RX_RTR_FRAME

0x40

// Set if RTR msg; else clear

#define CAN_RX_DBL_BUFFERED 0x80

// Set if msg was
//   hardware double-buffered

You may use bitwise AND (

&

) to adjust the appropriate flags. For example:

(MsgFlag & CAN_RX_OVERFLOW != 0) {

... // Receiver overflow has occurred; previous message is lost.

}

CAN_MASK

constants define mask codes. Function 

CANSetMask

expects one of

these as its argument:

#define CAN_MASK_B1  0

#define CAN_MASK_B2  1

CAN_FILTER

constants define filter codes. Function 

CANSetFilter

expects one of

these as its argument:

#define CAN_FILTER_B1_F1  0

#define CAN_FILTER_B1_F2  1

#define CAN_FILTER_B2_F1  2

#define CAN_FILTER_B2_F2  3

#define CAN_FILTER_B2_F3  4

#define CAN_FILTER_B2_F4  5

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