topic S32K144 How to make CAN network by CRC module? in S32 Design Studio

S32K144 How to make CAN network by CRC module?

tkdwofl — Fri, 12 Oct 2018 07:26:39 GMT

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.

Re: S32K144 How to make CAN network by CRC module?

jiri_kral — Fri, 12 Oct 2018 08:42:53 GMT

Hi,

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

Jiri

Re: S32K144 How to make CAN network by CRC module?

tkdwofl — Mon, 15 Oct 2018 02:11:15 GMT

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

Re: S32K144 How to make CAN network by CRC module?

jiri_kral — Mon, 15 Oct 2018 13:01:06 GMT

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

Re: S32K144 How to make CAN network by CRC module?

tkdwofl — Mon, 22 Oct 2018 10:11:51 GMT

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..

Re: S32K144 How to make CAN network by CRC module?

jiri_kral — Mon, 22 Oct 2018 16:44:40 GMT

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