S32K144 How to make CAN network by CRC module?

tkdwofl · ‎10-12-2018

hi!!!

i used s32k144 Design studio.

Is the CAN communication applied using the CRC module?

If it is incorrect. How to make CAN network by CRC?

Thank you for providing the example code.

jiri_kral · ‎10-12-2018

Hi,

the FlexCAN module counts CRC by itself. FlexCAN is fully supporting ISO 11898-1 standard.

Jiri

tkdwofl · ‎10-14-2018

Can I check the code of the FlexCAN module itself to calculate the CRC? (For example, a Header file, a predefined CRC value.)

jiri_kral · ‎10-15-2018

Hi,

the CRC is done by hardware itself. You can check the CANx->CRCR (chapter 53.4.2.14 in Reference Manual) register or capture CRC on oscilloscope.

Jiri

tkdwofl · ‎10-22-2018

OK i see.

but i want to make a fault on CRC with CAN.

How to make a fault CRC within CAN?

Please help me with my question.

Thanks..

jiri_kral · ‎10-22-2018

Hi,

I'm afraid that the only possibility how to inject CAN CRC error is modify physical layer - for example very short line drop affecting couple bits in payload.

Jiri