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How is it intended that these be programmed? Python? C? Ladder logic? Something else?

Also what is the mapping between your various IO modules and how they are named in the program code?

There's a kernel module called piControl (source code is on GitHub) which periodically polls the I/O modules. The values written to the outputs are taken from a memory area called the "process image". Values read from inputs are stored in that same memory area. User space accesses the memory area via regular open/read/write/close system calls. Plus there's a bunch of ioctls to perform special actions such as firmware updates on the I/O modules.

You may use whatever language you prefer. There's a Python module called RevPiModIO, authored by a member of the Revolution Pi community, Sven Sager: https://revpimodio.org/en/homepage/

A NodeRED module was contributed by another customer, Erminas: https://flows.nodered.org/node/node-red-contrib-revpi-nodes

If you're into Structured Text, there's a software called logi.RTS included in our image (needs a license for unlimited use, 1 hour is free).

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