Microcontrollers User manual

UM10237_2 © NXP B.V. 2008. All rights reserved.
User manual Rev. 02 — 19 December 2008 516 of 792
NXP Semiconductors
UM10237
Chapter 18: LPC24XX CAN controllers CAN1/2
17.3.5 Scenario 3.2: Message gets overwritten indicated by Message Lost
This scenario is a sub-case to Scenario 3 in which the lost message is indicated by
Message Lost.
Fig 88. Message overwritten indicated by semaphore bits and message lost
01 11 01 1100 00
1st Object
write
2nd Object
write
2nd Object
read
Interrupt Service
Routine
IntPndx
semaphore
bits
look-up
table
access
MsgLostx
message
handler
access
ARM
processor
access
clear
SEM
write
SEM
write
D2
write
D1
write
ID,
SEM
write
SEM
write
D2
write
D1
write
ID,
SEM
read
SEM
read
D2
clear
SEM
read
SEM
read
D1
read
SEM
read
D2
read
D1
1st Object read