How can I measure the sampling frequency of ADC1 on the Nucleo-l476rg board?

[8bit]

I am using HSI as a system clock and PLLSAI1R ADC clock.

With PLL, ADC1 clock value becomes 80 MHz.

I am using End of conversion interrupt in continuous conversion mode on the channel 5.

How can I measure sampling rate of the ADC,?

[waclawek.jan]

Use a relatively high-impedance ADC input source and observe the ADC pin using an oscilloscope. You'll see the sampling as thin pulses as the sampling capacitor charges.

Other option is sofware: set up a DMA to convert some number of samples, and duration of that number of conversion will give you the sampling rate.

JW

[Tesla DeLorean]

+1

Time Stamp the DMA completion, or toggle a GPIO and scope it

or work the math on the clocks/settings, it's all gear ratios.

Usually if you want defined timing, you use a TIM to trigger the ADC, and set the ADC to optimal speed/performance settings to meet delivery deadlines.