How can I view the number of ADC conversions per second?

[MGH745]

Hello
I am using STM32G030 but my question is not specific to G series

How can I view the number of ADC conversions per second?

For example I can put Counter++ in (DMA circular )HAL_ADC_ConvCpltCallback  And get it in seconds using a timer?

The G030 has a 12-bit ADC with 2Ms/s

ADC clock of 32 MHz divided by 2 = 16 MHz (12.5 + 1.5) should be 1.1Msample/s? is not it?

Is this practical?

[MM..1]

Your question is not practical. ADC have docu and on init you define speed of conversion . 

Some years ago i here ask why MX not shown this values , when ADC is configured. I mean still not show, then you need calc this. For example 

STM32G0-Analog-ADC-ADC.pdf

[MGH745]

I am testing it right now
When I put ADC_SAMPLETIME_160CYCLES_5, the counter shows the number 92486. But when I set it to ADC_SAMPLETIME_79CYCLES_5, it stops working

[MM..1 · Accepted solution]

ADC DMA isnt designed for one sample buffer, or better say your complete callback cant be more instruction cycles as one conversion when you set one as buffer = next not practical chaos

Your code is in IRQ and next IRQ arrive = stop working

[MGH745]

I understood the problem

Is your solution that more channels should be used in this case?

Can you tell me a little more simply what is meant by ADC DMA isnt designed for one sample buffer?

I appreciate you

[MM..1]

You set buffer length for example 1000 and ADC + DMA do job ofload MCU  fill buffer and one IRQ on half 500 and second on 1000 initiate your job in code to do somethink with samples.

[MGH745]

You mean that, for example, in this microcontroller, 2.5Msample/s for one channel cannot be achieved

How to know the buffer cycle limit for IRQ so that it does not get stuck?

I think it is 100k samples for each buffer for this micro

[MGH745]

I mean, what do we calculate that doesn't stop according to the number of channels (buffer length) in the IRQ.