I decided to build piscope with a wavegenerator using pigpio. Each RPi is dedicated to the task, however during boot and after that some of the GPIOs are inputs but some is output. Additionally, I would like to interface with 5V systems, too; for experimental reasons. It also make sense to organize the I/Os for easy connection.
I would like to build inputs of piscope with 5V tolerant ICs and 5V outputs for the wavecreation. I have got the idea the output IC should have modifiable power supply voltage needed (e.g. jumper). If you have any suggestion I really appriciate it.