topic Re: Transfer/ Receive n bytes & Synchronous Transmit via SPI in Model-Based Design Toolbox (MBDT)

Transfer/ Receive n bytes & Synchronous Transmit via SPI

SuperBeginner — Wed, 18 Sep 2024 02:24:56 GMT

Dear NXP,

I have two questions regarding SPI communication development using MBDT:

How can I read or write n bytes (>2 bytes)?
I have verified that 2-byte data transmission is working fine with the packet generator using the example project "s32k3xx_spi_async_interr_ebt".
However, when I try to transmit 4 bytes of data (0xAA 0xAB), the EVB only receives the 0xAA data.
I know this is quite normal, but I just want to provide an example to help you better understand my issue.
How do I develop synchronous transmit?
I referenced the example "s32k344_spi_sync_master_ebt" and tried to start data transmission with LPSPI2, but it doesn’t work.
I checked the status. "SPI_SetupEB" shows 0 and "SPI_SyncTransmit" shows 1.
I have confirmed that my hardware connections are normal, as the asynchronous example project works correctly when programmed directly.

Please help me. Thank you.

SuperBeginner — Fri, 20 Sep 2024 05:57:57 GMT

Dear NXP,

Regarding the second question - "How do I develop synchronous transmit?", I found the answer myself.

I found this was an oversight on my part, I didn't enable SpiPhyUnitSync under the S32 Config tool.

This resulted in my SPI communication not functioning in synchronous mode.

But regarding the first question - "How can I read or write n bytes (>2 bytes)?", I still need your help.

I don't know who can help me.

Please forgive me for now tagging engineers who have helped me in the past.

Thank you.

Irina_Costachescu — Fri, 20 Sep 2024 06:10:38 GMT

I would like to point you to the following thread, as a reference to a similar use case that was approached. Could you please check if the solution provided here is suitable for your use case? https://community.nxp.com/t5/Model-Based-Design-Toolbox-MBDT/SPI-configuration-MODEL-based-design-tool-box-32-bit-instruction/m-p/1384476

Hope this helps,

Irina

SuperBeginner — Fri, 20 Sep 2024 07:43:44 GMT

Thank you for your reply.

You solved my problem, thanks.