set flexcan to Listen-Only mode, RX interrupt abnormal

[liuning_neu]

hi  nxp  S32K expert :

   I use S32K148,  for flexcan module,I want to Switch off transmit path, because i can not find the right way to do it, so i choose set flexcan  to  Listen-Only mode.  after i set  flexcan  to  Listen-Only mode, when flexcan receive a  can message, it enter  FLEXCAN_Error_IRQHandler,  not  enter FLEXCAN_IRQHandler.   my destination is  set  flexcan  to  Listen-Only mode,  when flexcan receive a  can message,  it enter FLEXCAN_IRQHandler.   in my opinion  ,the result  identify  RX interrupt are functional in LOM mode abnormally.

my question:

1:    I want to konw the result is right or wrong?  if it is wrong , what is the right way to realize it?

2:    Is there other way to realize  Switch off transmit path  of flexcan

my codes as following:

/* enter freeze mode */

 FLEXCAN_EnterFreezeMode(base);
/* Select mode */
FLEXCAN_SetOperationMode(base, FLEXCAN_LISTEN_ONLY_MODE);

/* exit freeze mode*/
FLEXCAN_ExitFreezeMode(base);

[PetrS]

Hi,

it could be expected behavior, if a message is not acknowledged by other node

BR, Petr

[liuning_neu]

hi  Petr Stancik:

   how to realize  a message is acknowledged by other node?  could you tell me the specific operation or where i can get it ?

[PetrS]

Hi,

you should have another active CAN node on the bus, which acknowledges the message. Every active node, that is able to transmit/receive, acknowledge a message on the bus, this is autonomous behavior as per CAN standard.

BR, Petr

[liuning_neu]

thank you very muchPetr Stancik