S32K146 FlexCAN FDEN cannot set 1

[feng0119]

HI,all

I use Flexcan demo, in FLEXCAN_DRV_Init 

feng0119_0-1704443623074.png

enable canfd fail，I find FRZ is 1 Freeze Enable,but mcr fden  not be set 1.

feng0119_1-1704443713836.png

I want to know why this is happening.

My English is not good. Thank you!

[PetrS]

Hi,

FDEN can be set in Freeze mode only so do you have FRZACK set as well to indicate module is in Freeze mode? Also consider if CAN FD is available for used module, it is not on FlexCAN2 of S32K146.

BR, Petr

[feng0119]

Hi,

feng0119_0-1704600130006.png

Both FRZACK and FRZ are set 1,but FDEN still cannot be set 1

[PetrS · Accepted solution]

Hi,

try to change FDEN within debugger directly, while in Freeze mode.
And check part number if CAN FD is even implemented. 

BR, Petr