Atmel Evaluation Kit AT91SAM9X35-EK AT91SAM9X35-EK Data Sheet
Product codes
AT91SAM9X35-EK
923
SAM9X35 [DATASHEET]
11055E–ATARM–10-Mar-2014
• MACR: Abort Request for Mailbox x
It is possible to set MACR field for several mailboxes in the same time, setting several bits to the CAN_ACR register.
• MTCR: Mailbox Transfer Command
This flag clears the MRDY and MABT flags in the CAN_MSRx register.
When several mailboxes are requested to be transmitted simultaneously, they are transmitted in turn. The mailbox with the high-
est priority is serviced first. If several mailboxes have the same priority, the mailbox with the lowest number is serviced first (i.e.,
MBx0 will be serviced before MBx 15 if they have the same priority).
est priority is serviced first. If several mailboxes have the same priority, the mailbox with the lowest number is serviced first (i.e.,
MBx0 will be serviced before MBx 15 if they have the same priority).
It is possible to set MTCR for several mailboxes at the same time by writing to the CAN_TCR register.
Mailbox Object Type
Description
Receive
No action
Receive with overwrite
No action
Transmit
Cancels transfer request if the message has not been transmitted to the
CAN transceiver.
CAN transceiver.
Consumer
Cancels the current transfer before the remote frame has been sent.
Producer
Cancels the current transfer. The next remote frame will not be serviced.
Mailbox Object Type
Description
Receive
Allows the reception of the next message.
Receive with overwrite
Triggers a new reception.
Transmit
Sends data prepared in the mailbox as soon as possible.
Consumer
Sends a remote transmission frame.
Producer
Sends data prepared in the mailbox after receiving a remote frame from a
Consumer.
Consumer.