Renesas RH850 Series

RH850 Series CAN Transmit Procedure (CAN FD Mode)
R01AN6029EJ0100 Rev.1.0 Page
19
of 42
May 10, 2017
3.1 Message Transmit Function
This is the function to transmit data frames or remote frames. The messages stored in the transmit/receive FIFO
buffer are transmitted in the order in which they were stored.
Figure 3-1 shows the transmit mode operation of the transmit/receive FIFO buffer.
Figure 3-1 Operation of Transmit/receive FIFO Buffer (Transmit mode)
Transmit/receive FIFO transmission completion interrupt source activated
1
CFIDLk,Hk
CFTSk
CFPTRk
CFDF0k～3k
Msg1
Msg2
Msg3
Msg3
Msg2
Programmatically
・ Transmit data set
Msg1
Transmit/receive FIFO buffer k
Msg3
Msg2
Msg1
：Transmit/receive FIFO transmission completion interrupt source is "when the transmit/ receive FIFO buffer
becomes empty"
(When the CFIM bit of the CFCCLk register is “0”)
：Transmit/receive FIFO transmission completion interrupt source is " every time one message is transmitted"
(When the CFIM bit of the CFCCLk register is “1”)
CAN Bus
Transmit buffer p
Link
Transmit data