Nxp semiconductors, 2 message lost bit and can channel number, Fig 84. fullcan message object layout – NXP Semiconductors LPC24XX UM10237 User Manual
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UM10237_4
© NXP B.V. 2009. All rights reserved.
User manual
Rev. 04 — 26 August 2009
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NXP Semiconductors
UM10237
Chapter 18: LPC24XX CAN controllers CAN1/2
17.2.2 Message lost bit and CAN channel number
is the detailed layout structure of one FullCAN message stored in the
FullCAN message object section of the Look-up Table.
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.
Fig 83. FullCAN section example of the ID look-up table
0
FullCAN
Explicit
Standard
Frame
Format
Identifier
Section
11-bit CAN ID
SCC
0
Message
disable bit
Message
disable bit
Index 0, 1
Index 2, 3
Index 4, 5
Index 6, 7
0
SCC
11-bit CAN ID
1
2
3
4
5
6
7
8
9
0
1
1
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0
2
3
0
11-bit CAN ID
SCC
0
SCC
11-bit CAN ID
0
11-bit CAN ID
SCC
0
SCC
11-bit CAN ID
0
11-bit CAN ID
SCC
0
SCC
11-bit CAN ID
New:
FullCAN
Message
Interrupt
enable bit
New:
FullCAN
Message
Interrupt
enable bit
Fig 84. FullCAN message object layout
31
0
RX Data 4
RX Data 3
RX Data 2
RX Data 1
RX Data 8
RX Data 7
RX Data 6
RX Data 5
9
7
8
15
16
10
23
24
Msg_ObjAddr + 0
APB
Base +
F
F
RX DLC
R
T
R
S
E
M
0
ID.2
8
ID.1
8
............................
Msg_ObjAddr + 4
Msg_ObjAddr + 8
S
E
M
1
New:
FullCAN
Message
lost bit
SCC
New:
CAN
Source
Channel
un-
used
unused
unused