measure the frequency of the input signal of an ADC !

[mahmoud_dhaiwi]

Posted on February 04, 2013 at 15:44

Hi,

In my project, I have to measure the frequency of the input signal of an ADC. I use STM32F107 as micro and ADS1251U as ADC. is it possible? I will be grateful. Thnx for help :) #measure-frequency #adc-stm32 #adc

[frankmeyer9]

Posted on February 04, 2013 at 16:03

In my project, I have to measure the frequency of the input signal of an ADC.

You will rarely have an input signal composed of just one frequency. You can calculate the spectre of the input signal, which gives you an estimate of the frequencies involved, and their power contribution to the signal. You can use the .

../STM32F4xx_DSP_StdPeriph_Lib_V1.0.1/Libraries/CMSIS/DSP_Lib/Examples/arm_fft_bin_example

as guidance. Be aware that it might use up some considerable amount of performance.