OnOff Shim and Hyperpixel


#1

Hi guys,

When I try to use OnOff SHim and Hyperpixek together. When I turn on the Pi by OnOff shim, Pi will be powered for 1 or 2 seconds and then turned off.

Is there a workaround to use them together?
Thanks,
Tim


#2

As far as I’m aware HyperPixel uses all of the GPIO, so I’d guess there’s a conflict with OnOff Shim which uses GPIO 4 & 17.


#3

What he said
https://pinout.xyz/pinout/hyperpixel# BCM 4 (Blue 2) and BCM 17 (power button)
https://pinout.xyz/pinout/onoff_shim# BCM 4 (shutdown) and BCM 17 (Green 7)
I don’t think there is a workaround, the HyperPixel uses all the GPIO pins.


#4

There is a secondary i2c bus which you could put an io expander on but it would be quite complex and I am unsure of the specifics.


#5

Is there any way to connect the hyperpixel without requiring the entire GPIO? I’d be willing to sacrifice color depth, refresh rate, or even touch interface.