RXB0CTRL datasheet(17/92 Pages) MICROCHIP

17 / 92 page

 2003-2012 Microchip Technology Inc.

DS21801G-page 17

MCP2515

FIGURE 3-1:

TRANSMIT MESSAGE FLOWCHART

Start

CAN bus available

to start transmission?

Examine TXBnCTRL.TXP <1:0> to

Are any

TXBnCTRL.TXREQ

bits = 1

The message transmission

sequence begins when the

device determines that the

TXBnCTRL.TXREQ for any of

the transmit registers has been

set.

Clear:

TXBnCTRL.ABTF

TXBnCTRL.MLOA

TXBnCTRL.TXERR

Yes

TXBnCTRL.TXREQ=0

or CANCTRL.ABAT=1

Clearing the TxBnCTRL.TXREQ bit

while it is set, or setting the CANC-

TRL.ABAT bit before the message

has started transmission, will abort

the message.

Transmit Message

Was

Message Transmitted

Successfully?

Yes

Clear TxBnCTRL.TXREQ

CANINTE.TXnIE=1?

Generate

Interrupt

Yes

Message

Yes

Set

TxBnCTRL.TXERR

Lost

Determine Highest Priority Message

Set

TxBNCTRL.MLOA

The CANINTE.TXnIE bit

determines if an interrupt

should be generated when

a message is successfully

transmitted.

GOTO START

CANTINF.TXnIF

Yes

Message error

Lost arbitration

Arbitration

Error

CANINTE.MEERE?

Generate

Interrupt

Yes

Set

CANTINF.MERRF

RXB0CTRL 데이터시트(PDF) 17 Page - Microchip Technology

RXB0CTRL 데이터시트(HTML) 17 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92

데이터시트 다운로드

링크 URL