Microcontroller usually can have IRQ raised on GPIO event. So one device could e.g. produce a rising edge on a GPIO output which is connected to another device' GPIO input. Of course you have to spend two wires, one connecting the GPIO and the other connecting the GND. See the chapter about GPIO IRQ in pico datasheet https://datasheets.raspberrypi.com/rp20 ... asheet.pdf , chapter "2.19.3. Interrupts"
Other possibility are e.g. UART signals.
When connecting multiple devices then startup, shutdown scenario needs to be handled. Could be at startup that one device is not yet ready while the other is already toggling a GPIO. Even worse when power is not up for both devices and one issues a GPIO high but receiving device is not yet powered. But this is beyond the question asked.
Other possibility are e.g. UART signals.
When connecting multiple devices then startup, shutdown scenario needs to be handled. Could be at startup that one device is not yet ready while the other is already toggling a GPIO. Even worse when power is not up for both devices and one issues a GPIO high but receiving device is not yet powered. But this is beyond the question asked.
Statistics: Posted by ghp — Sat Feb 01, 2025 6:57 am