George_ wrote:
> Hello,
> I have installed a "Pimoroni onoff shim" for a completely shut on and
> off of my Raspberry with a hardware momentary button. The switch works
> fine with Raspbian, but the original software doesn't run with
> piCorePlayer.
>
> The switch needs a trigger script to initiate shutdown by button press
> (GPIO17 set to 0) and a gpio-shutoff code (GPIO4 set to 0), which is
> executed at the end of the poweroff-function when piCorePlayer is
> shutdown.
>
> The trigger script works fine with typing "/home/tc/pcp-powerbutton.sh
> -i -17 --low" as user command #1 on the tweaks page. Is there any
> possibility to set GPIO4 to 0 when piCorePlayer is shutdown so that the
> shim realises the shutdown and cuts off completely?
>
> Regards George
Using a program to drive an output high is going to be tricky, since the
shutdown kills all processes. You can try the gpio-poweroff overlay,
which will do this at the firmware/kernel level.
in your config, set
dtoverlay=gpio-poweroff,gpiopin=4,active_low=1
I have a feeling that a reboot will trigger a the power off event too,
as there is notes in the help info
Code:
--------------------
Name: gpio-poweroff
Info: Drives a GPIO high or low on poweroff (including halt). Enabling this
overlay will prevent the ability to boot by driving GPIO3 low.
Load: dtoverlay=gpio-poweroff,<param>=<val>
Params: gpiopin GPIO for signalling (default 26)
active_low Set if the power control device requires a
high->low transition to trigger a power-down.
Note that this will require the support of a
custom dt-blob.bin to prevent a power-down
during the boot process, and that a reboot
will also cause the pin to go low.
input Set if the gpio pin should be configured as
an input.
export Set to export the configured pin to sysfs
--------------------
I'm have not found how to generate the "custom" dt-blob.bin. The new
audiophonics power module that is active high, works just fine.
piCorePlayer a small player for the Raspberry Pi in RAM.
Homepage: https://www.picoreplayer.org
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