topic Re: i.mx93 LPSPI + eDMA problem on Cortex-M33 in i.MX Processors

i.mx93 LPSPI + eDMA problem on Cortex-M33

albi84 — Sun, 08 Feb 2026 20:31:09 GMT

I’m using a Tria i.MX9332 (B1 silicon) SMARC module and trying to use LPSPI6 with eDMA on the Cortex-M33, but I can’t get it working.

Development environment

Hardware

Current status

The display works correctly when using LPSPI6 without DMA.
I’m trying to switch to LPSPI6 + eDMA to improve throughput, but I cannot get completion notification.

Issue
The DMA-based transfer appears to start, but I never receive the LPSPI DMA completion callback at the end of the transfer.

Details and relevant code/config are in the attached file.
Could someone point out what I might be missing, or why the callback is not triggered?

pengyong_zhang — Tue, 10 Feb 2026 06:54:26 GMT

Please refer the attachment patch file configuration the LPDPI with EDMA

B.R

albi84 — Tue, 10 Feb 2026 17:32:58 GMT

Thank you for the sample code. Reviewing the example helped me to make it work.

rti — Thu, 05 Mar 2026 16:11:02 GMT

Hello,

Can you please share the skeleton for the LPSPI with eDMA?

Thanks.

albi84 — Mon, 09 Mar 2026 08:34:33 GMT

It is not a skeleton but the actual code I use. Does this help?