Set up multiple ADCs on STM32 microcontrollers using DMA 

Thank you to your past self for taking the time to put this into a video for your future self, and then share it with the rest of us.

Great Video. I found a bug in the HAL. sometimes (not every time) the generated HAL is wrong. The MX_DMA_Init(); must be called before MX_ADC1_Init(); otherwise the ADC makes just one measurment. But this is not guaranteed always correct. (Cube IDE 1.7.0)

The IDE has slightly changed since this video I think. I had to click the dropdown arrows next to each "Rank" and set them to Channel 1, 2 and 3 respectively. Then the DMA worked fine with the Blackpill F401 board. This is also a kind of note-to-self thing. Cheers, great vid!

You use volatile to tell the compiler the variable is used (updated) outside of the routines that reference it; in this case, the DMA writes to it. You need to change the title of your presentation to Set up multiple channels of a ADC for scan using DMA. This is important because was looking for setting up multiple ADCs (ie. ADC 1, ADC2, ADC3) all using scanning. Since there is only one callback I need to know how to tell which ADC DMA was completed.

Nice Video. Thanks for uploading

How many samples per second can be achieved???., Please let me know., i am working on Audio signal

A flawless video

Nice info, thank you for sharing it :)

You didn't setup multiple ADCs via DMA, rather multiple channels on single ADC. Caption is bit confusing

I got valid reading for only one channel; the other one is always 0. What could be the problem?

These are not multiple ADC's but these are multiple channels ADC. Did you make videos on using ADC1 and ADC2 at the same time

Nice overview thanks very much! A question if I may? If someone wants to use two ADCs at the highest speed, but synchronise the readings so that 2 memory buffers receive each sample at the same time, what's the best way in your view? If software start is used they might drift by a sample or two, so use a high speed timer to activate both, one timer drives both? Can a timer run a 1MHz, I guess it can? Or is there a better way?

Awesome Video!! Could you post the code in the description?

The HAL_ADC_Start_DMA function is consuming a lot of time. Since I am using it in a 50kHz regulator, it is critical to me. Is there another way to start the conversion?

Did the same, works flawless for 3 out of 5 channels I used... Doesn't seem to be the wiring, "adcResultsDMA" is consistently wrong on index 2 and 3, even if I use different channels in board config

Thank for you jobm it was good

It looks like this example does 1 reading for each of the 3 adc channels. How do you do multiple adc readings for each channel?

awesome video. How can i do this with a timer?

thx

the ending gave me schizophrenia