s32k148 FlexCAN0 How to enter Stop mode and Pretended Networking mode

[liuning_neu]

hi  nxp expert:

    I used S32K148, I want to set  flexcan0 to  Pretended Networking mode, when  flexcan0  receive   a message ,  it will  enter  FLEXCAN_WakeUpHandler.  now, when flexcan0  receive   a message  ,it do not enter  FLEXCAN_WakeUpHandler, it  enter  FLEXCAN_IRQHandler,  meanwhile  CAN MCR[LPMACK]  is 0

my codes as following:

 FLEXCAN_DRV_ConfigPN(i, true, &flexcan_pn_config_struct[channel]);  //  set flexcan0 as  Pretended Networking mode

FLEXCAN_EnterFreezeMode(base);  //  enter freeze mode

g_smcBase->STOPCTRL = (g_smcBase->STOPCTRL & SMC_STOPCTRL_STOPO_MASK) | SMC_STOPCTRL_STOPO(2U);  //  global Stop mode request

FLEXCAN_ExitFreezeMode(base); //  exit  freeze mode

my question:

1 , how to  make  CAN MCR[LPMACK]  is 1, that is  enter  low power mode?

2, How do I  make  FlexCAN0 modules entered Stop mode and Pretended Networking mode correctly？

[liuning_neu]

hi  Petr Stancik:

 my questions:

1---- if  S32k148  in LOW POWER  MODE, can_MCR[LPM_ACK] =1, is it right?

2---- S32k148  flexcan0 only  in Pretended Networking mode(system  not in STOP mode), when flexcan0  receive   a message,will it enter FLEXCAN_WakeUpHandler?

3---  S32k148,    system   in STOP mode,  flexcan0 in Pretended Networking mode, when flexcan0  receive   a message,will it enter FLEXCAN_WakeUpHandler?

[PetrS]

Hi,

1) yes

2) no, FlexCAN stays in normal mode, FLEXCAN_IRQHandler is called. MCR[PNET_EN] just allow to enter PN mode when chip is in stop mode.

3) yes

BR, Petr

[liuning_neu]

thank you very much 

[PetrS]

Hi,

did you execute the WFI instruction which invokes stop modes for the chip?

BTW you can refer to below example, but it is not using SDK...

https://community.nxp.com/docs/DOC-346305 

BR, Petr