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Dunk
Associate II
Feb 26, 2026 1:08 PM UTC
Solved

STM32G031F8P6 VREFINT reading zero during DMA conversion while VSENSE working correctly.

Using DMA to read 3 ADC channels. IN0, VSENSE & VREFINT all enabled in CUBEMX. First 2 channels read as expected but for VREFINT it seems to always read zero. Am I missing a setting in the CUBEMX?

Dor_RHBest answer
ST Employee
Mar 2, 2026 11:12 AM UTC

Hello @Dunk,

Could you try to have a look at the ADC_MultiChannelSingleConversion example: Link(here)

It contains an .ioc file that will be helpful for your application.

I hope my answer has helped you. When your question is answered, please select this topic as the solution that answered you, as it will help others find that answer faster.

Thanks for your contribution.

Dor_RH

In order to give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question. Dor_RH
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2 replies

mƎALLEm
mƎALLEm
ST Technical Moderator
Mar 2, 2026 10:09 AM UTC

Hello,

1- What if you change the ranking by swapping VSENSE and VREFINT ranks?

2- Check if VREFEN bit is set in ADC_CCR register. From the reference manual:

screenshot.png

I know you are using CubeMx to generate the code, but we need to ensure the code is well generated as well.

To give better visibility on the answered topics, please click "Best answer" on the reply which solved your issue or answered your question.
    Dor_RHBest answer
    ST Employee
    Mar 2, 2026 11:12 AM UTC

    Hello @Dunk,

    Could you try to have a look at the ADC_MultiChannelSingleConversion example: Link(here)

    It contains an .ioc file that will be helpful for your application.

    I hope my answer has helped you. When your question is answered, please select this topic as the solution that answered you, as it will help others find that answer faster.

    Thanks for your contribution.

    Dor_RH

    In order to give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question. Dor_RH
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