Enabling SPI pins as digital I/O

General Discussion
1

Basic Information:

Printer Model: re:3D Gigabot 4
MCU / Printerboard: Archimajor (Archim) sam3x8e
Host / SBC: Raspberry Pi 4B
klippy (45).log (203.6 KB)

Describe your issue:

On the Archim boards, pins PA25, PA26, PA27 are reserved on spi0. I’d like to use these pins as standard digital pins. Is there a way to disable/change the pin reservation within the source code or configuration?

2

It seems that this may not be possible with the Archim board as it appears that spi0 is driving multiple peripherals including the thermocouples.

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Anyhow, I modified Klipper to change pins PA25, PA26, PA27 to GPIO and was met with bus conflicts. Here’s the code change if anyone finds it helpful:
Modify SPI pins to GPIO · re3Dev/klipper@2cdb3ba · GitHub