i.mx93 LPSPI + eDMA problem on Cortex-M33

[albi84]

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

• VS Code 1.109.0

• MCUXpresso for VS Code extension 26.1.56

• SDK 25.09.00

Hardware

• Tria SM2S-IMX93 on a custom carrier board

• LCD with ILI9341 controller connected via SPI (LPSPI6)

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 · Accepted solution]

Hi @albi84 

Please refer the attachment patch file configuration the LPDPI with EDMA

B.R

[albi84]

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

[rti]

Hello,

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

Thanks.

[albi84]

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