STM32H7 ADC + DMA + Timer Firmware Tutorial - Phil's Lab  

I've been looking for a tutorial on H7 ADCs for a while now, perfect timing with a new project!! your content is a literal goldmine and is getting so many of my friends into the embedded world

This video was the best stm32 tutorial for a stm32 beginner like me. I followed your instruction with my stm32f103 and it worked like a charm and for the first time with stm32, I didn't face any issues while programming. huge thanks for making such a content.

Funny, I was ripping my hair apart the past week trying to figure this out for a school project. Just when I thought all hope was lost, our lord and savior Phil descends from the heavens. I truly can't thank you enough Phil, your videos make my life so much easier!!!

I have just done the same things but a with an STM32F4; ADC + timer + DMA to sample ultrasonic sounds from bats, up to 115Khz, so a sample rate of about 240KHz. Then in real time do the FFT to identify the peak frequencies, draw an spectrogram, etc. I was just fighting with each and every of those settings in the cubeide 🙂, but it works very well.

Thank you for the content. Please never stop doing videos!

Loved the MPU wenthrough. Really nice and clear explanation. Tweaks in mpu really handy when you play around with dma and peripherals! Thanks!

Hahah I was already trying to design a stm32h7 board, and you upload this, perfect timing

Man, I reallt could've used this in some previous projects. Thanks a million as always.

Good stuff! The H7x5/H7x3 series of this chip is a monster at 520MHz (550Mhz if you're willing to disable ECC). Though with that comes some nutty power domain complexity... Much more involved than the G4 series.

Can't thank you enough for your content Phil! With your series of videos, one like myself can work on a complete DSP design based on a H7 core. Appreciate your work mate!!

Thx for another great video. I am working with AVR stuff(SAM) but i want to use DMA in the future. This gave me a better understanding on how the concept of DMA basically works. Have a nice weekend!

THANKS Philip you're the best ! look for more creative projects

Great explanation of a very interesting topic.

nice video phil... thanks for sharing...

I have been working on the ADC of the F7 F4 and L4 series, the performance of these things are absolutely beasts. Sometimes I just keep several necleo boards around and use them as daq.🤣

Thank you! Waiting for mentioned future video. Im working with H7 for some time and caching in topic Id like to introduce in HMI project

24:00 I always like to reinforce the idea of using the slope intercept formula to convert the ADC to pretty much any value you need. I haven't done any graphing whether the output is exactly linear, but I feel it is a good approximation. Your explanation is perfect and thoroughly enjoyed the video.

great video !!!! love it!

Hi Phil, great video, thanks for it! I think that maybe the generated code for STM32U5 already calls those power enable functions when you use the respective peripherals. At least in a project I have here, I use the ADC and HAL_PWREx_EnableVddA() is called inside HAL_MspInit(). I did not test for USB and PG IO's.

Nice video!

Well explained. It'll surely save a lot of time for newcomers to the H7.

I love the stream of consciousness here. It all makes a lot of sense, I'm just lacking the context of what this is all aiming to do! Maybe there's a video that I missed.

My brain now hurts. Thank you.

That cap in the potentiometer circuit is more than just a low pass filter. These converters are capacitive ladder and draw a spike of current / charge when they sample. The cap is a cheap easy way to provide this charge and eliminate a strange error you will see otherwise, as long as you can live with your chosen cutoff frequency.

BEST!!!😀

You know I've been bashing my head against this on a h7 for the last 3 days, i just get it all working at 2AM and *now* you post this video? Jerk 😂

Phill you gonna make more online courses with STM32? Wold be nice about programing STM32. I liked a lot the cource hardware desing with kicad.

Great video again, just up my alley. 😁 What is not 100% clear to me after some testing with the H723 and H750 is whether it's best to use SRAM that is in the domain of the DMA controller that is being used. From what I understand, if you use an SRAM block in a different domain than the DMA controller, the data needs to be passed through a 32-bit AHB bus to the other domain. For example, if you use AXI SRAM in domain 1 for the DMA buffer and the DMA1 controller located in domain 2, the data will pass via the 32-bit D1-to-D2 AHB bus that connects domain 1 and domain 2. This will take extra cycles or not? Additionally, I found that, for example, the BDMA controller can only access SRAM4 in domain 3, and DMA1 and DMA2 don't have access to SRAM4 in domain 3, and vice versa. So, I made sections for the different SRAMs in the linker file and used the compiler command to store the buffer in that section with attribute((section("blablabla"))). Not fully sure if this is the way to go, but at least I can use all the sram that is across the domeins. The so-called master DMA, MDMA, is a very useful peripheral. Last week I've tested its link capabilities, which can be triggered by other DMAs and can set/clear flags and such. Made code that when I start DMA2D transfer(normal hal function), it's triggers MDMA when complete, and MDMA copies data from DMA2D buffer into SPI buffer that is refreshing the screen. It's a very simple linked list but it's done without any CPU intervention.

phil pleas next video on STM32 Digital PFC boost converter .

👍🙏❤️

For power filtering, i always see people (such as altium academy and other) always mention to not use ferrite beads and other options are better. Do you support the same position or you think it's ok to use them? are there other ways to filter the 3.3V power line you showed in the video? thanks Their claim is that ferrite can cause unforeseen problems as it can resonate and cause problems when high switching element such as ICs and uC are connected to, and the only OK way to use it is with DC loads.

What is your take on ferrite beads? Many reputable people tells you to avoid them, usually.

Another great, and timley video again as I'm wrestling with the ADCs on a Nuceleo-H743ZI2! I've followed everything, but I still get zeros in the live expressions when debugging and I'm not sure where I'm going wrong with this :( In the demo section where you have working values in the live expressions have you already done the cache control changes? I've tried the changes outlined but no avail. The nucelo I'm using has different memory regions to the H7 used in your demo. I have: FLASH, DTCMRAM, RAM_D1, RAM_D2, RAM_D3, ITCMRAM. Does it matter which I choose? I arbitrarily tried RAM_D3. Finally, you say this reduces the speed - I'm shooting for around 2 Msamples/s for my final goal. Will I run into problems with the cache here? Thanks again for the great video!

please make a video about EatherCAT ET1100 ASIC pcb desing

Need lesson about i2s on stm32h7! I have f303 and no problems on it, but on h750 a have an underrun error

Hey Phil. Do you always use HAL? I personally never use HAL, everything will be coded on register level.