MCP2510-SLASHST datasheet(23/80 Pages) MICROCHIP

23 / 80 page

DS21291F-page 23

MCP2510

FIGURE 4-2:

MESSAGE RECEPTION FLOWCHART

Set RXBF0

Start

Detect

Start of

Message

Valid

Message

Received

Generate

Error

Message

Identifier meets

a filter criteria

CANINTF.RX0IF=0

Go to Start

Move message into RXB0

Set RXB0CTRL.FILHIT <2:0>

CANINTF.RX1IF = 0

Move message into RXB1

Set CANINTF.RX1IF=1

Yes, meets criteria

for RXBO

Generate

Interrupt on INT

Yes

Frame

The

CANINTF.RXnIF

bit

determines if the receive

to accept a new message

Yes

Begin Loading Message into

Message Assembly Buffer (MAB)

according to which filter criteria

was met

Set RXB0CTRL.FILHIT <0>

according to which filter criteria

Set CANSTAT <3:0> accord-

ing to which receive buffer

the message was loaded into

RXB0CTRL.BUKT=1

The RXB0CTRL.BUKT

bit determines if RXB0

can roll over into RXB1

if it is full

Generate Overflow Error:

Set EFLG.RX1OVR

CANINTE.ERRIE=1

Go to Start

Yes

ARE

BFPCTRL.B0BFM=1

BF1CTRL.B0BFE=1

AND

Pin = 0

Set RXBF1

Pin = 0

Yes

CANINTE.RX0IE=1?

CANINTE.RX1IE=1?

RXB1

RXB0

Yes, meets criteria

for RXB1

Set EFLG.RX0OVR

Generate Overflow Error:

Set CANINTF.RX0IF=1

ARE

BFPCTRL.B1BFM=1

BF1CTRL.B1BFE=1

AND

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