ARM_Bruzzler Posted November 19, 2023 Share Posted November 19, 2023 Hello, I'm using a BPI M2 Zero (with H3 Chip) to control two relays on CON2-P05 / PA11 and CON2-P03 / PA12. During the boot process there is a high level present at the pins, which is driving the relays. Is there a way to create a DTB overlay to drive the pins to a low level during boot. My userspace application uses libgpiod to control the pins. I'm familiar with compiling and activating overlays, i would just need help to write the correct .dts file. Thank you very much in advance 0 Quote Link to comment Share on other sites More sharing options...
ARM_Bruzzler Posted November 20, 2023 Author Share Posted November 20, 2023 I solved the issue on hardware level. It turned out that those pins had external pull-ups. I switched to two other pins which worked just fine. 1 Quote Link to comment Share on other sites More sharing options...
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