topic S32K344 CAN and PCAN problem in S32K

S32K344 CAN and PCAN problem

Voledi — Fri, 10 Jan 2025 08:25:56 GMT

Hi NXP team,

I'm using
-s32k344 EVB 172

-S32DS 3.6 + RTD5.0.0

I have problem blow:
I modified the flexcan_ip_s32k344_example to transmit CAN between 2 boards or with PCAN ( attachment blow)

it works when i communicate between 2 boards:

but when connecting to PCAN it gives error

PCAN site:

Can you explain why ? Thanks

Re: S32K344 CAN and PCAN problem

PetrS — Fri, 10 Jan 2025 12:45:37 GMT

Hi,

change CAN protocol clock to FXOSC, not the FIRC and modify CAN bit timing accordingly.
I used below and PCAN works well.

BR, Petr

Re: S32K344 CAN and PCAN problem

Voledi — Mon, 13 Jan 2025 02:40:46 GMT

Thanks a lot sir, this helped me solve my problem

Re: S32K344 CAN and PCAN problem

Voledi — Mon, 13 Jan 2025 09:41:36 GMT

hi, i got new problem with same source code (attachment )

I only call FlexCAN_Ip_Send(INST_FLEXCAN_0, TX_MB_IDX, &tx_info, MSG_ID, (uint8 *)&dummyData); 1 time, but after I send a message from PCAN, the s32k344 Board receives the data, but I see on PCAN receiving more Messages from S32K344 sent even though I don't call FlexCAN_Ip_Send() anymore.

Can you help,thanks

Re: S32K344 CAN and PCAN problem

PetrS — Mon, 13 Jan 2025 10:23:30 GMT

Hi,

a code configures MB1 to receive message with ext ID=0xFACE. Within a callback function, once this MB was updated a FlexCAN_Ip_Send is called to reply back with ext ID=0x14.

BR, Petr