pimoroni/hyperpixel

Enable easy switch between hyperpixel and HDMI

hoegge opened this issue · 3 comments

hoegge commented

It would be very useful if there was an easy way to disable the display (i.e. enable HDMI again) and enable (when done using HDMI) like a script so you do not have to uninstall every time you need to change display. Would that be easy to do?

Thanks

Gadgetoid commented

There's a good topic about this on our forums, here: https://forums.pimoroni.com/t/hyperpixel-selective-output-eg-on-boot/5193

hoegge commented

Is there any way to use the HDMI as main display and then only use the HyperPixel for dedicated programs? The hyperpixel display is not very suitable for debugging and developing.

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tinspin commented

TLDR on the link above is: If you write a 1 to this file /sys/class/backlight/rpi_backlight/bl_power the screen turns off... write a 0 again to turn it on... and this works in realtime! Compared to DPI, HDMI/DVI is just bad! I wish we could get larger DPI screens...
Edit; FYI this means you can turn the screen on/off from the keyboard with ZERO latency!
Prediction: GPIO is the everything connector/cable of the future if we can handle the electromagnetics! NOT USB!
Going even further RxTx (also known as COMM and RS232) is better than I2C and SPI!

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