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I am working on my biggest FPGA project as of so far. Ive previously completed USB RXD/TXD serial com FTDI, VGAPMOD graphics, BRAM circuits, Mouse/KB circuits, and of course LOGIC/PROCESSING. Now im embarking upon interfacing a Raspberry PI zero GPIO to ARTY PMOD connectors. The GOAL is that the PI will become a slave unit to the FPGA where RPI0 USB 2.0 devices, RAM, HDMI Graphics/Sound, and processing will be entirely controlled by the FPGA ARTY Board. Im planning on 1) 8/16bit INPUT BUS to the RPI0 and 1) 8/16bit OUTPUT BUS from the RPI0 with data on/off bus interrupt signals. FPGA send/receive processing seems pretty straight forward, where data control words interrupts and data signals work in tandem. My only seemingly weak point In the project is that im new to RPI programming using python, even with many years of education in programming, Ive only glanced over Python structure and syntax. Im just not 100% certain of how many of my native architectures in CS programming will carry over to python. Important areas Arrays, Code Strings, GPIO connectivity, sound/graphics, KB/Mouse handling, File/Folder Handling, are all new to me on a Raspbian/Linux PYTHON system, even with years of experience with JAVA. BASIC, C/C++, ASM/ML mainly for MS windows. Input suggestion and advice is welcome on any level. Regards, DC