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Error when using STM32 DMA config block

Hi everyone,
I'm trying to get DMA to transfer ADC1 data to memory (0x20000000) automatically on STM32G431CB. ADC1 is triggered by TIM1_CC1. If I set DMA trigger source to ADC1 and try to codegen then it throws this Picture 2 error.

I checked all the DMA block examples provided by Altair, but I did not understand anything since I am a beginner in this field and the examples don't seem to use ADC, but simple waveforms read and write.

I also checked YouTube and AI tools but couldn't find any useful information. It's very hard to learn Embed, there is very limited beginner-friendly docs and tuts.

Any help is greatly appreciated. Thank you

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Accepted answers

pdarnell

You are only showing the ADC configuration screen. It always helps to see the entire diagram to diagnose issues, but I am guessing you didn't start with a G431 ADC example. We have example diagrams for most parts and peripherals, so it makes sense to start there.

I bet your example didn't have instances of ADC input blocks. Embed won't generate code unless there is a block that is connected to an ultimate consumer block. So you would need at least 2 ADC read blocks connected to some other consumer block (a block with at least 1 input and no output). In the attached diagram, there is a compound block that contains 2 ADC inputs. You should select the compound, right click on it and select compile. That will result in a downloadable .elf file that will be downloaded and run by the HIL block when you click the green "Go" button.

AdcReadG431RB.vsm

All comments

pdarnell

Hi xchum, If you try to read more than 1 regular data channel, the code generator will set up the ADC DMA to RAM automatically. No need to do it manually, that will only conflict with the code generator. You call youself a beginner, but ironically you know enough about the ADC DMA requirement on regular ADC channels to realize DMA is required. But you need to relax and let the Altair Embed code generator handle the DMA for that.😁

xchum

Thank you for the reply @pdarnell , I am using 2 ADC1 channels, the generated code is still not implementing ADC DMA automatically. Here is my ADC settings, am i doing something wrong here? Gemini told me to change the sequencing to MULTI_CONV(scan) but this param is read only.

pdarnell

AdcReadG431RB.vsm

xchum

Super helpful! I had two ADCs set up but didn’t wire channel 2 to the other consumer block. After fixing that, ADC DMA showed up in the generated code. I do wish the embed docs spelled this out better—the docs feel a bit thin. The YouTube tutorials are outdated and expect you to be an expert or very fast-paced, and with so little info out there, AI tools haven’t been very reliable. Still, the software is awesome—way more intuitive than the competition. Thanks a ton @pdarnell you saved the day!