OXIMETRY

I've provided code for processing signals from AFE4490 Integrated Analog Front-End, IR sensors and performing a Fast Fourier Transform (FFT) analysis to calculate the SpO2 value. The code appears to be calculating the SpO2 value based on the red and infrared signal magnitudes.

Setup Section

• Initializes serial communication for debugging.
• Waits until a serial connection is established before proceeding.

Loop Section

• Constructs the input data arrays vRealir and vRealred with the acquired signal data (presumably from datair[] and datared[] arrays).
• Calls the FFT.Compute() function to perform the FFT on the input data for both IR and red signals.
• Calls FFT.ComplexToMagnitude() to calculate the magnitudes of the FFT results.
• Searches for the maximum magnitude value (the peak) in the calculated magnitudes for both IR and red signals.
• Calculates the red-to-IR ratio (r) using the maximum magnitudes of the red and IR signals.
• Computes the SpO2 value using a polynomial equation involving the calculated r value.