topic Re: How do I add new SmartDMA firmware to the MXCA346 project? in MCX Microcontrollers

How do I add new SmartDMA firmware to the MXCA346 project?

Hathaway_Noa — Wed, 04 Feb 2026 01:30:14 GMT

I used the MCUXpresso SDK Builder to generate an SDK for the FRDM-MCXA346 development board. The SDK includes a SmartDMA example project named “frdmmcxa346_smartdma_keyscan”. However, this example does not include a SmartDMA firmware that can convert RGB565 data to RGB888 format for output to an LCD.

I would like to ask whether there are any other example projects that include a SmartDMA firmware for RGB565-to-RGB888 conversion.
In addition, are SmartDMA firmware binaries reusable or compatible across different MCX or other NXP MCU families?

Re: How do I add new SmartDMA firmware to the MXCA346 project?

Alice_Yang — Wed, 04 Feb 2026 10:57:03 GMT

Hello @Hathaway_Noa

Please refer to this application note:AN14172: Using SmartDMA for Graphic on MCX N Series MCU | NXP Semiconductors

This application note introduces the application of SmartDMA on the graphic. In addition to the general DMA function, it also supports data format processing.

Thank you.

Alice

Re: How do I add new SmartDMA firmware to the MXCA346 project?

Hathaway_Noa — Thu, 05 Feb 2026 01:13:08 GMT

Thank you for your reply. This has been very helpful for my understanding of SmartDMA.

Further, the SmartDMA byte-array firmware is provided by NXP. If I would like to write my own SmartDMA firmware to implement entirely new functionality, is this feasible? Are there any documents that explain how SmartDMA firmware is developed or written?

Re: How do I add new SmartDMA firmware to the MXCA346 project?

Alice_Yang — Fri, 06 Feb 2026 03:35:36 GMT

Hello @Hathaway_Noa

It is difficult to develop your own firmware. The only available reference document is the MCXA346RM.

Thank you.

Alice