topic Re: S32K146 FlexCAN FDEN cannot set 1 in S32K

S32K146 FlexCAN FDEN cannot set 1

feng0119 — Fri, 05 Jan 2024 08:41:34 GMT

HI,all

I use Flexcan demo, in FLEXCAN_DRV_Init

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

I want to know why this is happening.

My English is not good. Thank you!

Re: S32K146 FlexCAN FDEN cannot set 1

PetrS — Fri, 05 Jan 2024 13:50:26 GMT

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

Re: S32K146 FlexCAN FDEN cannot set 1

feng0119 — Sun, 07 Jan 2024 04:02:39 GMT

Hi,

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

Re: S32K146 FlexCAN FDEN cannot set 1

PetrS — Mon, 08 Jan 2024 11:37:21 GMT

Hi,

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

BR, Petr