I plan on forming a microphone array with 4 MEMS microphones and doing the signal processing(beamforming) in matlab/C on my PC.
MEMS mics i use have Digital I²S interface with high precision 24 bit data (ADMP441). I have them placed on the PCB so they are ready to use.
I can't directly connect these mics to my PC so i need an interface between the mics and my PC however however i don't want to spend too much effort into this step and keep it as "high-level" as possible since i am pretty incompetent on hardware level. I currently may have access to an FPGA board (Nexys2/spartan3E) or a raspberry pi.
Handling I2S input on raspberry pi by programming in C doesn't sound much scary i suppose but i don't know where to even start on the fpga board. As in: which pins to get the input from or how to adjust the clock frequency so that it can handle 4 I2S inputs. I have basic verilog knowledge and probably enough digital electronics knowledge.
If this is managable with the FPGA without any additional interface circuitry, i would like to get into "how".
I have read similar questions but none of them provided basic guidance to my problems.
Thanks in advance!