topic Re: How to get CAN error state? in S32 SDK

How to get CAN error state?

kbj — Wed, 22 Aug 2018 05:07:21 GMT

Hi,

I use S32DS for ARM.2018.R1 and SDK EAR 0.8.6.

On FlexCAN, How to get CAN error state (CAN BUS OFF)?

I can't find the function to get CAN error state.

Best regards,

Byungju.

Re: How to get CAN error state?

jiri_kral — Fri, 24 Aug 2018 13:12:02 GMT

Hi,

it looks like that this feature is not implemented in SDK. You can get this info from register directly:

CAN0->ESR1 & CAN_ESR1_FLTCONF_MASK

Jiri

Re: How to get CAN error state?

kbj — Sun, 26 Aug 2018 23:34:05 GMT

Hi Jiri,

Thanks for your response.

Can I set a callback or interrupt when a CAN error occurs?
If so, how do I set it up?

Best regards,

Byungju.

Re: How to get CAN error state?

jiri_kral — Mon, 27 Aug 2018 13:20:53 GMT

Hi Byungju,

sure - there is interrupt specially for Bus Off - CAN0_ORed_IRQHandler and for other errors you can implement

CAN0_Error_IRQHandler.

You can install your handler by INT_SYS_InstallHandler();

More details about CAN interrupts you can find on Chapter 53.1.4 FlexCAN Interrupts (S32K1xx Series Reference Manual, Rev. 7, 04/2018 - page 1630). SDK example lpit_periodic_interrupt_s32k144 is good example how to add custom interrupt handler.

Hope it helps.

Jiri

Re: How to get CAN error state?

kbj — Mon, 27 Aug 2018 23:34:50 GMT

Hi Jiri,

Thanks for your help.

I will try it.

Best Regards,

Byungju.