Experimental Physics and
Industrial Control System

1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 <2024>	Index	1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 <2024>
<== Date ==>		<== Thread ==>

Subject:	Re: Reg : How to use custom baud rate such as 125000 for ioc running on Linux
From:	Mrinal Bera via Tech-talk <tech-talk at aps.anl.gov>
To:	Abhishek Mazumdar - STFC UKRI <abhishek.mazumdar at stfc.ac.uk>
Cc:	"tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>
Date:	Wed, 28 Feb 2024 19:35:09 +0000

This Message Is From an External Sender

This message came from outside your organization.

Hi Abhishek,

Maybe you can run this script as root/sudo to check the supported baud rates in your linux system:

for bauds in $(
    sed -r 's/^#define\s+B([1-9][0-9]+)\s+.*/\1/p;d' \
        /usr/include/asm-generic/termbits*.h ) ;do
    echo $bauds
    stty -F /dev/ttyS0 $bauds && echo Ok.
done  2>&1 |
    pr -at2

The output of the script on RHEL-8 system, I am running in one of my computer looks like this:

50				    Ok.
75				    Ok.
110				    Ok.
134				    Ok.
150				    Ok.
200				    Ok.
300				    Ok.
600				    Ok.
1200				    Ok.
1800				    Ok.
2400				    Ok.
4800				    Ok.
9600				    Ok.
19200				    Ok.
38400				    Ok.
57600				    Ok.
115200				    Ok.
230400				    Ok.
460800				    Ok.
500000				    Ok.
576000				    Ok.
921600				    Ok.
1000000				    Ok.
1152000				    Ok.
1500000				    Ok.
2000000				    stty: /dev/ttyS0: unable to perform
2500000				    stty: /dev/ttyS0: unable to perform
3000000				    stty: /dev/ttyS0: unable to perform
3500000				    stty: /dev/ttyS0: unable to perform
4000000				    stty: /dev/ttyS0: unable to perform

Best,

Mrinal

On Feb 28, 2024, at 4:42 AM, Abhishek Mazumdar - STFC UKRI via Tech-talk <tech-talk at aps.anl.gov> wrote:

This Message Is From an External Sender

This message came from outside your organization.

Hello,

I am running an ioc for a device in linux which supports 125000 baud rate using UART communication.

The vendor of the device has provided python libraries through which I am able to communicate with the device without any issues.

The vendor's python libraries uses python serial package to communicate with the port /dev/ttyUSB1 (for example) using baud rate 125000.

But when I am using the baud rate 125000 in my ioc's st.cmd , I am not able to communicate with the device.

How to communicate with the device using 125000 baudrate using EPICs IOC ?

Thanks,

Abhishek Mazumdar

References:: Reg : How to use custom baud rate such as 125000 for ioc running on Linux Abhishek Mazumdar - STFC UKRI via Tech-talk

Navigate by Date:: Prev: Re: Reg : How to use custom baud rate such as 125000 for ioc running on Linux Mrinal Bera via Tech-talk; Next: archiver appliance quickstart installation Rong Huang via Tech-talk; Index: 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 <2024>
Navigate by Thread:: Prev: Re: Reg : How to use custom baud rate such as 125000 for ioc running on Linux Mrinal Bera via Tech-talk; Next: Re: Reg : How to use custom baud rate such as 125000 for ioc running on Linux Timo Korhonen via Tech-talk; Index: 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 <2024>

ANJ, 11 Sep 2024

· Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System