S32KのトピックNXP LPSPI Configuration S32K344 EVB

NXP LPSPI Configuration S32K344 EVB

rakYps21 — Wed, 07 Oct 2026 14:53:48 GMT

Hi team,

I am currently working on LPSPI communication on the S32K344 EVK using NXP RTD 4.0.0.

I have completed the required configuration for LPSPI and am trying to develop an SPI loopback communication on the EVK.
However, I am currently facing an issue where the data is being transmitted, but I am not receiving the expected data in the RX buffer.

I have attached the following for your reference:

Project source code
Relevant configuration details

Could you please go through the attached project and configuration and help me identify the issue?

Specifically, I would appreciate your support in checking:

LPSPI master/slave configuration
LPSPI pin configuration and signal routing
TX/RX buffer configuration
API usage for LPSPI transmit and receive

Any additional configuration required for loopback communication on the S32K344 EVK

Please let me know if any additional information or logs are required from my side.

Thanks,

Raky

Re: NXP LPSPI Configuration S32K344 EVB

VaneB — Wed, 07 Oct 2026 21:34:49 GMT

Hi @rakYps21

I reviewed your code and configuration, and I could not find any issues. I also flashed the project onto an FRDM-A-S32K344 board, and as shown in the screenshots below, the RX buffers on both the master and slave sides contain the expected data for both transmissions.

I understand that you are using an S32K3x4EVB board. Could you please let me know which specific EVB variant you are using?

Also, if possible, could you share a picture of the MCU on your board? I would like to check the device marking and mask set.

BR, VaneB

Re: NXP LPSPI Configuration S32K344 EVB

rakYps21 — Thu, 08 Oct 2026 09:52:54 GMT

Hi @VaneB,

Thank you for your acknowledgment and for testing the setup from your end.

I am currently using the FRDM Automotive S32K344MINI-EVB board HDQFP172 MCU.

I have also shared an image of the MCU mounted on the board for your reference.
Kindly check and confirm.

Please let me know if you need any additional information from my side.

Regards,

Raky

Re: NXP LPSPI Configuration S32K344 EVB

VaneB — Thu, 08 Oct 2026 16:56:38 GMT

Hi @rakYps21

Thank you for sharing the image.

It looks like we are using a very similar setup. To make sure both setups are aligned, could you please double-check that your SPI signals on your setup are connected as shown below and match the pin assignments specified in the FRDM-A-S32K344 Rev. A schematic?