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 <[email protected]> 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. > > > >
