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Hi
I have a Zero2Go Omini which I'm setting up today.
In the manual, there is this 'system-up' signal, which works on GPIO 17. I'm a little confused about it!
- Does this signal from the Pi to the Zero2Go that the system is 'up', or the other way around?
- What does this signal do? I.e. what is the intended use, or action that happens when the signal is sent?
I've read the manual lots of times but seem to be missing the point 🙂
Thanks!
Aaron
Posted : 07/01/2025 11:46 am
This signal is sent from the Pi to Zero2Go, to indicate that the system on Pi has been started up. This is done by toggling GPIO 17 on the Pi, which is monitored by the firmware running in Zero2Go's MCU (ATtiny841).
When the firmware receives this signal, it updates some internal variables to make sure the device behave as expected.
In case this signal is not received, Zero2Go doesn't know the system has been booted up and it may not behave normal subsequently.
Posted : 07/01/2025 11:57 am