UM10360 Datasheet, PDF (385/835 Pages) NXP Semiconductors – LPC17xx User manual

NXP Semiconductors
UM10360
Chapter 16: LPC17xx CAN1/2
Index 0, 1
Index 2, 3
Index 4, 5
Index 6, 7
Message
disable bit
Message
disable bit
3
2
1
1 0 9 8 7 6 54 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
SCC 0
11-bit CAN ID
SCC 0
11-bit CAN ID
SCC 0
SCC ⁰
11-bit CAN ID
11-bit CAN ID
SCC 0
SCC ⁰
11-bit CAN ID
11-bit CAN ID
SCC ⁰
11-bit CAN ID
SCC ⁰
11-bit CAN ID
FullCAN
Explicit
Standard
Frame
Format
Identifier
Section
New:
FullCAN
Message
Interrupt
enable bit
New:
FullCAN
Message
Interrupt
enable bit
Fig 62. FullCAN section example of the ID look-up table
16.2.2 Message lost bit and CAN channel number
Figure 16–63 is the detailed layout structure of one FullCAN message stored in the
FullCAN message object section of the Look-up Table.
APB
Base +
Msg_ObjAddr + 0
Msg_ObjAddr + 4
Msg_ObjAddr + 8
New:
FullCAN
Message
lost bit
New:
CAN
Source
Channel
31
24 23
16 15
10 9 8 7
0
R
F_T
F^R
unused
RX Data 4
SS
EE
MM
10
unused
RX DLC
RX Data 3
RX Data 8
RX Data 7
SCC
un-
ID.2
used
8
RX Data 2
RX Data 6
............................
ID.1
8
RX Data 1
RX Data 5
Fig 63. FullCAN message object layout
The new message lost bit (MsgLst) is introduced to indicate whether more than one
FullCAN message has been received since last time this message object was read. For
more information the CAN Source Channel (SCC) of the received FullCAN message is
added to Message Object.
UM10360_1
User manual
Rev. 01 — 4 January 2010
© NXP B.V. 2010. All rights reserved.
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