topic Re: ADC DMA Example doesn't work in Model-Based Design Toolbox (MBDT)

ADC DMA Example doesn't work

simon98 — Mon, 16 Jun 2025 15:30:28 GMT

Hi,

i'm developing a project on S32K3X8EVB-Q289 using MBDT v1.5

i'm trying to implement ADC with DMA and after some effort i found this ticket online:

https://community.nxp.com/t5/Model-Based-Design-Toolbox-MBDT/DMA-enabling-in-MBDT/m-p/1819674

based on this i tried to implent all the instructions that @Irina_Costachescu gave.

The prolem comes up when i try to build... matlab give me this error:

I don't know how to solve this problem... could someone tell me how to fix that or if i'm missing something?

thanks

Simon

Re: ADC DMA Example doesn't work

simon98 — Fri, 27 Jun 2025 14:52:52 GMT

I've made a little step forward importing the configuration from the example provided nut i'm stil stuck with this problem:

https://community.nxp.com/t5/Model-Based-Design-Toolbox-MBDT/ADC-DMA-Example-doesn-t-work-with-my-S32CT-Configuration/m-p/2124851#M10317

Re: ADC DMA Example doesn't work

dragostoma — Mon, 22 Dec 2025 14:54:44 GMT

Hi, @simon98,

The latest NXP Model-Based Design Toolbox for S32K3 version 1.8.0 includes an updated model example that uses ADC and DMA: s32k344_pwm_adc_dma_s32ct in adc folder. You can use this model as a reference for your application.

Hope this helps,

Dragos

Re: ADC DMA Example doesn't work

simon98 — Wed, 11 Mar 2026 15:54:36 GMT

Hi @dragostoma,

I was only now able to test the ADC with DMA example from MBDT version 1.8.

At first, I encountered the same issue: the callback was executed, but in FreeMASTER I couldn’t see the value of the variable ADC_POT0 updating (the same behavior I had in version 1.6).

After several attempts, I tried adding the following MCL blocks to check whether the DMA was actually working correctly:

To investigate further, I opened the project with S32DS 3.6. While debugging, I can see that ADC_POT0 changes according to the potentiometer position even if the MCL blocks in Simulink are commented out. However, in FreeMASTER, ADC_POT0 does not update.

Therefore, I was wondering what causes this behavior and whether it is possible to fix FreeMASTER’s behavior in some way.

Attached you will find the project I used for these tests.

I look forward to your kind feedback.

Thank you,
Simon