S32KのトピックRe: LIN Communication with Flexio_Lin

LIN Communication with Flexio_Lin

ASN7 — Wed, 13 Nov 2024 11:04:00 GMT

I have custom board of S32K314_172HDQFP with TJA1029 LIN Transceiver. The TX and RX are assigned to PTA8 and PTA9 which correspond to FXIO_D6 and FXIO_D7 respectively.

Now I add the Flexio_Mcl_Ip and then under Specific Configuration Tab, I select Logic Channel 0 for Tx and select Flexio Pin as PIN_6 and respectively Flexio Logic Channel 1 for Pin_7. Under Flexio_Lin Driver and under the Lin Global Config Tab, I select Lin hardware FLEXIO_IP_0, and then Rx and Tx Channel as shown in the image below.

Irrespective of the TJA1029, I should be able to see the output from the MCU on my logic analyser right, but I just see one pulse. Is there something that I am missing ?

Since I cannot share my complete code, I have attached the part of code related to LIN which I have taken from the example code "Lin_Ip_FrameTransfer_S32K344".

Re: LIN Communication with Flexio_Lin

ASN7 — Wed, 13 Nov 2024 11:06:38 GMT

I do not know why the code was not attached. But I have attached it here.

Re: LIN Communication with Flexio_Lin

PetrS — Fri, 15 Nov 2024 11:56:55 GMT

Hi,

it looks like driver interrupt is not installed and called so next frame bytes are not processed. Try to check that. Also discussed on https://community.nxp.com/t5/S32K/S32K324-Lpuart-lin-Master-Continually-Returning-Status-quot/m-p/1843988

Also LIN transceiver must be connected and active. IF testing without transceiver you need to connect TX to RX.

BR, Petr

Re: LIN Communication with Flexio_Lin

ASN7 — Wed, 23 Apr 2025 09:22:36 GMT

Can you clarify how to select the Pin & Channel of FlexIO for LIN ?

For example I select PTE0 as LIN_RX which is FXIO_D3 and PTE1 as LIN_TX which is FXIO_D2, what are the channel and respective pin numbers for S32K314 ?

I get the issue because I see multiple FXIO_Dx for each FXIO pins.