search

kwindrem / RpiGpioSetup

VenusOs: 5 digital inputs, all pull-ups
27 stars 6 forks source link

When installing, 1W devices are gone #25

Closed MBj1703 closed 3 months ago

MBj1703 commented 3 months ago

Hi,

I have two 1w Tempsensors on GPIO 26. When I install the RpiGpioSetup the devices are gone?

Any idea, what to change in my config?

Thanks!

MBj1703 commented 3 months ago

just figured out, when I delete dtoverlay=VenusGpioOverlay out of the /u-boot/config all is working as expected

kwindrem commented 3 months ago

That overlay is changing the programming of some of the GPIOs so that all inputs have pull ups. The default for the chip is some to have pull downs. Those with pull downs are active when there's nothing connected.

So I suspect what you are seeing is a conflict between pins used by the 1 wire sensors with their use as digital inputs. You can customize the overlay and then provide a custom gpio_list to avoid those conflicts.

The overlay is not modified by a firmware update so you would only do this once. RpiGpioSetup has an option for a custom gpio_list and that would be reinstalled on a firmware update.