CAN LOOPBACK and NAK

[RN_it]

Posted on July 10, 2018 at 08:58

Hello, 

I am using CAN1 in loopback mode and when i probed CAN1_TX, i found NAK. why is that ?

wont the same can1 controller ack it ?

if NAK then CAN1 should re transmit the frame ( NART is 0) , but dont see any retransmission 

trace is shown , Thanks. 

#stm32

[T J]

Posted on July 10, 2018 at 11:31

did you pull up the Rx pin ?

enable ABOM