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.on the Pi4B using the dts overlays. I don't have a Pi4 yet so no
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 Fri, Jun 17, 2022 at 06:45:02PM -0500, Steve Fatula wrote:
Is there anyway to get an attached serial port working on Debian andFrom what I have read you should be able to enable uart2 through uart5
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.
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.
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 andon the Pi4B using the dts overlays. I don't have a Pi4 yet so no
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
experience with doing that unfortunately.
https://forums.raspberrypi.com/viewtopic.php?t=244827 seems to have some talk about it though.
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:serial
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
disableconsole, 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
Bullseye. Butor enable?
As mentioned, had it working on Raspberry OS which is based on
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.
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.
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.
>
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.
>Â 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.
>
I'm not sure why the overlays are not included in Debian.
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.
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