Hi everyone!I'm about to start a new a design and I want to ask for some help.. The design will be a pcb as host (like a motherboard) that will control and receive data from 10 (identical) pcbs (daughterboards). Each daughterboard pcb, will have 2 FPGAs which will collect data from some ASICs and they will send the acquired data to a master FPGA located on the motherboard. So, the master FPGA will be receiving data from 20 FPGAs and i was wondering what kind of serial protocol to use for their communication. I was thinking of SPI, any other ideas? Thank you for your time.