Like let’s say I have a few old HP alphanumeric LED displays that have a simple bit pattern protocol. I’ve gotten them working in Arduino a long time ago. If I can find some unused pins how can I bit bang them into a custom protocol from user space using pins that may be unrelated as far as I/O ports on a modern computer? Is it even possible without a kernel module? Am I stuck with using a serial channel like SPI/I2C/UART to talk to an external controller?
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You can use WiringPI to control the GPIOs from Python
Could you use a small microcontroller running micropython? Then you can just type into the repl on that over usb, or run your python on it directly
I’ve done that before, and with Forth. I’m more interested in bridging what I know with hardware into the desktop environment… or understanding why it seems so disconnected.
Possibly important detail - what type of computer do you propose running this? Most methods that are common if you search the internet or ask here will likely apply to Raspberry Pi and it’s clones, but if you have something more esoteric it might not work.
I recall that there is a USB GPIO dongle which gives you a bunch of pins to play with. You would have to hunt around to find it though.
