Re: Using a serial port
On Sat, Jun 18, 2022 at 11:30:53AM -0500, Steve Fatula wrote:
> So, it sounds like the answer is no basically. Yes, I can compile debian and
> such but not what I have in mind, simply wanted to enable the UART for
> serial use. I'm not sure why the overlays are not included in Debian. I'll
> have to keep the event driven code controlling my projector on another
> machine for now sadly. I guess I will try and find a way to ask the debian
> "developers" who made the images for Debian. Thanks for the help.
>
The "developers" who made the image for Debian: fundamentally Gunnar Wolf
who is an excellent Debian developer - expert and of very long standing -
who has done a large amount of work. You might find others who could help
on IRC - OFTC channels #debian-arm and #debian-raspberrypi
The Raspberry Pi does things its own way and the way the overlays work
is largely particular to the RPi.
With every good wish, as ever,
Andy Cater
> On 6/18/22 2:38 AM, Francois Lorrain wrote:
> > Hello,
> >
> > This might be useful if you want to recreate the dts :
> > https://bootlin.com/blog/device-tree-supporting-similar-boards-the-beaglebone-example/
> >
> > I have not tried it ...
> >
> > Francois
> >
> > On Sat, 18 Jun 2022 at 06:20, Steve Fatula <steve@fatula.us> wrote:
> >
> > There are no dtoverlays using Debian, they are on Raspberry OS.
> >
> > On 6/17/22 7:34 PM, Lennart Sorensen wrote:
> > > On Fri, Jun 17, 2022 at 06:45:02PM -0500, Steve Fatula wrote:
> > >> Is there anyway to get an attached serial port working on
> > Debian and
> > >> raspberry PI 4? It appears the tested installs want to use it
> > as a serial
> > >> console, I do not. I want to use UART1, the PL011, as an RS232
> > port to a
> > >> projector.
> > >>
> > >> I can do this using Raspberry OS, but, not Debian using the
> > tested installs.
> > >> There is no way to disable Bluetooth via the overlays used on
> > Raspberry OS.
> > >> I can sort of mess around and stop the console from being
> > started on ttyS1,
> > >> but no way to use the port as a serial port to send and
> > received data.
> > >> Apparently the dtoverlays are not there.
> > >>
> > >> So, is there any way to really use a serial port, attached to
> > any GPIO pins,
> > >> as a real RS232 port using Debian images? if so, what do I need
> > to disable
> > >> or enable?
> > >>
> > >> As mentioned, had it working on Raspberry OS which is based on
> > Bullseye. But
> > >> unfortunately I can't use Raspberry OS for our usage.
> > > From what I have read you should be able to enable uart2
> > through uart5
> > > on the Pi4B using the dts overlays. I don't have a Pi4 yet so no
> > > experience with doing that unfortunately.
> > >
> > > https://forums.raspberrypi.com/viewtopic.php?t=244827 seems to
> > have some
> > > talk about it though.
> > >
> >
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