Yo Hal! On Wed, 26 Jun 2024 20:32:19 -0700 Hal Murray via devel <devel@ntpsec.org> wrote:
> I'm trying to setup a Pi with a GPS hat.
>
>
>
> The Microserver HOWTO says:
>
> {--config} Edit /boot/config.txt and add these lines to the end of
> the file, replacing 4 with the logical pin number for your HAT if
> it's not an Adafruit:
> # Get 1PPS from HAT pin
> dtoverlay=pps-gpio,gpiopin=4
>
> The first problem is that config.txt and friends have move from
> /boot/ to /boot/firmware/, but I can dance around that.
Uh, maybe for you, but not for my Raspberry Pi distros.
What distro are you on? I use Gentoo.
> The real problem is that the new/current config.txt says:
> # Do not modify this file!
> #
> # It is automatically generated upon install or update of either the
> # firmware or the Linux kernel.
> I haven't figured out where to put that line.
I would change distro to Gentoo. :-)
You can change that file, as long as you remember to fix it after
you use their configure tool. Me, I hate configure tools, and just
prefer to edit the files.
> My notes say to add "pps-gpio" to /etc/modules
Not on arm or arm64. That is what the dtoverlay does.
> The bits I got from Debian don't have a pps-gpio module.
You will not, you will have an overlay file under /boot somewhere.
> Anybody setup a GPS HAT on a Pi 1 recently?
I just did on a Pi3. The existing instructions worked fine for
me.
> The link behind "this photograph" is 404
Uh, what link?
> Find "north" on the HAT. It\u2019s the edge that the GPS module is
> closest to, and has a rectangular notch in it (a cutout for a ribbon
> cable). The GPIO header will be 90 degrees clockwise. If this isn't
> clear enough, see this photograph.
Pi HATs only fit one way. I seem to recall that Pi1 HATS are
not the same as Pi 2, Pi3, Pi4 or Pi 5 HATS.
RGDS
GARY
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