Finding the Data Buffer before sending the DAC pins, I need to apply an FFT to the signals.

[zeitounian]

Good morning, I know the fourier transform and I need to apply a signal to modulate a led system, but I do not know where the data buffer is, can someone help me.

[ESP_Sprite]

Your description doesn't make sense. Data buffer for what? What are you trying to do in the first place, as in what's the bigger picture, what problem are you trying to solve?

[fly135]

Good morning, I know the fourier transform and I need to apply a signal to modulate a led system, but I do not know where the data buffer is, can someone help me.

Hire yourself a good programmer because this is only the first in a long line of questions you need to ask to get the job done.

John A

[zeitounian]

Your description doesn't make sense. Data buffer for what? What are you trying to do in the first place, as in what's the bigger picture, what problem are you trying to solve?

okay, I think it was not clear enough, I need to process the audio signal packet before the sound is modulated in the DAC, and take some frequencies to modulate a PWM on a pin.

[ESP_Sprite]

Your description doesn't make sense. Data buffer for what? What are you trying to do in the first place, as in what's the bigger picture, what problem are you trying to solve?

okay, I think it was not clear enough, I need to process the audio signal packet before the sound is modulated in the DAC, and take some frequencies to modulate a PWM on a pin.

I'm still missing a lot of information here. Your program sends data to the DAC, presumably over I2S; why can't you intercept it before you send it to the I2S driver? Again, can you tell us what problem you're trying to solve instead of how to implement what you think is the best solution?