Rainbow Electronics AT91CAP9S250A - Manual (Page 737)

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6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
• 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
highest 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.
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.