Hi everyone! ![👋]()
I need a bit of help configuring a Raspberry Pi CM4 IO Board. I’m stuck with GPIO handling and I’m hoping someone here has encountered a similar issue.
The Goal: I would like to use GPIO pins 9 and 10 individually as simple "loop" inputs. The idea is that the pin should read HIGH when the circuit is closed, and LOW when it is open.
The Problem: Currently, the Pi keeps these pins constantly HIGH, regardless of whether the circuit is closed or open. I suspect the SPI interface is interfering (since these are default SPI pins), and I need to find a way to disable or reconfigure this behavior.
The Question: Can anyone recommend a configuration setting to free up these pins for standard GPIO usage? I’ve attached my current attempts below.
Thanks in advance for the tips!
I need a bit of help configuring a Raspberry Pi CM4 IO Board. I’m stuck with GPIO handling and I’m hoping someone here has encountered a similar issue.
The Goal: I would like to use GPIO pins 9 and 10 individually as simple "loop" inputs. The idea is that the pin should read HIGH when the circuit is closed, and LOW when it is open.
The Problem: Currently, the Pi keeps these pins constantly HIGH, regardless of whether the circuit is closed or open. I suspect the SPI interface is interfering (since these are default SPI pins), and I need to find a way to disable or reconfigure this behavior.
The Question: Can anyone recommend a configuration setting to free up these pins for standard GPIO usage? I’ve attached my current attempts below.
Thanks in advance for the tips!
Statistics: Posted by Stewie0425 — Sat Dec 27, 2025 3:39 pm