DAC in STM32 || Sine wave || HAL || CubeIDE

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How to use DAC (Digital to analogue converter) in STM32 using CubeIDE.
Also, generate the Sine wave using DAC with STM32.

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[ControllersTech]

The MAX freq of sine wave depends on the trigger frequency and the number of samples.
Let's say the HCLK is 150 MHz, and so is the timer frequency
If you keep the prescalar 0, and use ARR as 10-1, this means the trigger frequency from the timer will be 15 MHz
Now if you use 15 samples in the sine wave, you can generate the sine wave of 1 MHz
150 samples = 100 KHz
1500 samples = 10KHz

And so on

[lawrencestark]

Finally. Information on WHY you write the code this way instead of simply what the code is. Well done.

[pedrojanini]

Thank you! I really needed to know about the HAL_DAC_Start existence.

[drewh]

Thank you very much! I got it working!
Chose to go with a uint16_t array and using Half Word's instead of Word's for Data Width at 8:41, since the DAC has 12-bit or 8-bit modes and I wanted to save memory. I needed to cast my uint16_t array to uint32_t to make the compiler stop throwing a warning. I'd though the function would expect a uint16_t array instead of a uint32_t array once you change the 8:41 Data Width parameter, but apparently not.
Thanks for the "-1" tip at 9:20 and Content Assist Template Proposal (Ctrl+Space) demos throughout (eg, at 12:03);

[fatihokuyucu]

Good explanation, thank you very much. It is exactly what i want :))

[martinpalomino]

Thanks so much for the knowledge, I managed to get the stm32 to generate a sine wave with a frequency value = 60hz

[aleksnbg]

nice done.
You can use the symetry of sinus function to save some memory. Values in second half are equal to negative value of first half. (sin (x+180) = -sin(x).
Values in first and second and values in third and fourth quorter are symetrical around x=90 and x=270 degrees. sin (x+90) = sin(90-x)

[kallehallden]

hii Nice tutorial, Good explanation, thank you very much. It is exactly what i want in my project

[TheDadi]

No need to enable Tim2 global interrupt,
thank you for the good explanation

[mohammadrahimpoor]

hi any ideas about maximum frequency of a smooth sinewave using this dac unit?

[hectoreliucaballerodimas]

Nice tutorial.
Do you know how can I show the wave on labview?

[bennguyen]

Regarding the timer setting and frequency expected, my TIM6 clock speed (APB1 bus) shows 64Mhz. So, for a Timer event to trigger the dma every 8khz, I set the prescaler to 0, and TIM_ARR = (64M/8k)-1.


However, with the DMA pointing to a 2 sample buffer (0 and 0xFFF), what I see on the scope is a square wave at 4khz with a 50% duty cycle!! Considering the Stm32h7's has a maximum DAC sampling rate of 18.18Msps, what I *expected* was that every 8khz the timer would cause 2 samples to get transferred from the memory buffer to the DAC peripheral, and therefore the scope should show it briefly at 0V, but most of the time it would be idle at 3.3V while it waits for the next timer event... yet this is not the case, why?? Instead it's acting as if only one sample is transferred every timer event, despite:

HAL_DAC_Start_DMA ( &hdac1, DAC_CHANNEL_1, pBuffer, *LENGTH_2*, DAC_ALIGN_12B_R);

[ratulchowdhury]

how to generate noise sinewave and low pass filter to filter out the harmonics and getting pure sine wave by stm cubemx

[modellerdesign]

hi. can it be made like RF generator say till 10 mhz or so, and with encoder changing frequency with 1khz steps?

[kallehallden]

hello, using this method, ho I can generate the two sinewave on DAC1 & DAC2 Simultaneously ?

[jayakrishnanharikumaran]

I have an stm32G474. I tried this example and I can see that the DOR register is getting new values but the DAC doesnt output any values. Any reason why this can happen?

[oleksandrleskiv]

I did everything like in your tutorial.
However, I'm getting a DAC/DMA underrun error immediatelly after I start the tranfer. Do you know what might be the issue? Thanks!

[di]

how to you remove the dc component ? are you using capacitor in the output ?

[nsanandkumarak]

Hi Sir,

Thanks for video

I followed the same as mentioned . i am using stm32f407vg discovery board . but i am getting
DMA underrun error condition occurred for DAC channel2 (the currently selected trigger is
driving DAC channel2 conversion at a frequency higher than the DMA service capability rate). i reduced the timer counter frequency to 500KHz but still facing same error..

can you guide ur suggestion

[adesuyisunday]

Thanks for this project. Please do complete sinewave hbridge inverter with lcd and menu keypad to set all parameters.using stm32f