I chose the RasPi zero-W (the newest Pi, for $10 US) because it has built-in WiFi to do periodic time-sync, and it will allow me to update my clock software remotely, rather than taking the clock apart each time to update FPGA code.
My concern is the limited GPIO speed of the Pi, so I will have the Pi drive an FPGA, which in-turn drives the 7971 boards. For now, the FPGA is strictly for remapping ASCII character data into segment info, then serializing. If I see other issues, such as "wobbly" data on the seconds, I may load-up more work on the FPGA. Since I literally just taped-out my board last night, it's going to be several weeks before I have any idea how the Pi performs. Though I have another Pi for my 3D printer, I've never done any GPIO experimenting with it. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/af90925c-c3b2-4223-ae3f-962571c37c8d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
