at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 676

• Manufacturer Part Number: at91sam9263
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

Figure 37-13. Chaining Three Mailboxes to Receive a Buffer Split into Three Messages
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(CAN_MSRx)
(CAN_MSRx)
(CAN_MSRy)
(CAN_MSRy)
(CAN_MSRz)
(CAN_MSRz)
AT91SAM9263 Preliminary
CAN BUS
MRDY
MRDY
MRDY
MMI
MMI
MMI
If several mailboxes are chained to receive a buffer split into several messages, all mailboxes
except the last one (with the highest number) must be configured in Receive Mode. The first
message received is handled by the first mailbox, the second one is refused by the first mailbox
and accepted by the second mailbox, the last message is accepted by the last mailbox and
refused by previous ones (see
If the number of mailboxes is not sufficient (the MMI flag of the last mailbox raises), the user
must read each data received on the last mailbox in order to retrieve all the messages of the
buffer split (see
Message s1
Figure
Reading CAN_MDH & CAN_MDL for mailboxes x, y and z
Reading CAN_MSRx, CAN_MSRy and CAN_MSRz
Message s2
37-14).
Figure
37-13).
Message s3
Writing MBx MBy MBz in CAN_TCR
Buffer split in 3 messages
6249D–ATARM–20-Dec-07