topic Re: S32K348 CANFD normal communication in S32K

S32K348 CANFD normal communication

youngkin — Tue, 21 Oct 2025 08:34:32 GMT

hello：

Can you provide a can fd sample(s32k344 or s32k3358), thanks!

Re: S32K348 CANFD normal communication

PetrS — Tue, 21 Oct 2025 10:26:06 GMT

Hi,

you can refer to https://community.nxp.com/t5/S32K-Knowledge-Base/Example-S32K358-FlexCAN-TXRX-ISR-S32DS35-RTD400-500/ta-p/1981987

BR, Petr

Re: S32K348 CANFD normal communication

youngkin — Tue, 21 Oct 2025 11:48:56 GMT

Hello:

I have studied this example（ https://community.nxp.com/t5/S32K-Knowledge-Base/Example-S32K358-FlexCAN-TXRX-ISR-S32DS35-RTD400-500...）, but I have a question, how do I set up the mailbox and filtering for CAN FD。 Should I add the can driver module

and i cannot find the Mode of can rx and tx （polling or interrupt）

Also, I would like to inquire about the examples of CAN. can sample use CAN mcal module（Can_43_FLEXCAN）, while Flexcan sample use Drivers module(Flexcan). Can Flexcan module and Can_43_FLEXCAN module appear in the same project at the same time?

Re: S32K348 CANFD normal communication

PetrS — Tue, 21 Oct 2025 13:08:31 GMT

Hi,

if using IP level driver then MB and mask is simply configured within code using respective API

If using mcal level driver, ID and mask is defined in configuration, you outlined.

Flexcan_IP and Can_43_FLEXCAN modules can be used in the same project at the same time, but not for same FlexCAN instance.

BR, Petr

Re: S32K348 CANFD normal communication

youngkin — Wed, 22 Oct 2025 01:37:52 GMT

I am sorry, I would like to confirm three questions，

1. i cannot find the Mode of can rx and tx （polling or interrupt）in the sample（Example-S32K358-FlexCAN-TXRX-ISR-S32DS35-RTD400）, how to set the mode of rx and tx?

2. about the can clock set，This clock value only needs to be written as one value（Any value）。

the can peripheral clock need not Choose a reference clock，as show

3. the sample use the can interrupt, but i can not find the interrupt set

Re: S32K348 CANFD normal communication

PetrS — Thu, 23 Oct 2025 08:41:41 GMT

Hi,

1) Using IP level driver this is set withing code

If FlexCAN_Ip_Send function is called with tx_info.polling=TRUE, then for each MB used you need to periodically call FlexCAN_Ip_MainFunctionWrite with respective MB selected as parameter. This is to process transmitted Tx MB and update driver status variable.

If tx_info.polling=FALSE, FlexCAN_Ip_MainFunctionWrite calling is not needed, but module interrupt must be properly enabled and handler assigned.

For receiving isPolling parameter of Receive function specifies interrupt/polling mode.

Here again if polling is used you need to call FlexCAN_Ip_MainFunctionRead periodically, otherwise module interrupt must be properly enabled and handler assigned.

2) correct

3) either you can assign/enable interrupt in IntCtrl_Ip component and within code just IntCtrl_Ip_Init(&IntCtrlConfig_0) is called or

leave this empty in IntCtrl_Ip component and assign/enable interrupt within code, like

IntCtrl_Ip_Init(&IntCtrlConfig_0);
IntCtrl_Ip_EnableIrq(FlexCAN0_1_IRQn);
IntCtrl_Ip_InstallHandler(FlexCAN0_1_IRQn, CAN0_ORED_0_31_MB_IRQHandler, NULL_PTR);

BR, Petr

Re: S32K348 CANFD normal communication

youngkin — Fri, 24 Oct 2025 01:30:43 GMT

thanks for your help