Experimental Physics and
Industrial Control System

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<== Date ==>		<== Thread ==>

Subject:	Stream device: how to send waveform of chars without null terminator?
From:	Isabella Rey <[email protected]>
To:	"[email protected]" <[email protected]>
Date:	Wed, 1 Apr 2015 09:44:16 +0100

Hi All,

I have a device to which I need to send a file path followed by a number:

example:

load_curve C:\pulse.txt 3870

The file path is stored in the database as a waveform of chars.

When I run the protocol stream device sends (what I think is) a null terminator after the file path:

device receives:

load_curve C:\pulse.txt\x00 3870

Is there any way of getting rid of the \x00 terminator?

Below I copy my protocol and the database records.

Cheers,

Isabella

I've defined the protocol in stream device as:

load_curve

{

out "load_curve %(\$1)c %(\$2)i";

in "%(\$1:\$2)b";

}

and in the database I have:

record(bo, "DEV:LOAD_CURVE") {

field(DTYP, "stream")

field(OUT, "@my.proto load_curve(DEV:CURVE_FILE, DEV:VPI) $(PORT)")

}

record(waveform, "DEV:CURVE_FILE") {

field(DESC, "File path")

field(DTYP, "Soft Channel")

field(NELM, "256")

field(FTVL, "CHAR")

}

Replies:: Re: Stream device: how to send waveform of chars without null terminator? Ralph Lange

Navigate by Date:: Prev: EPICSv4 and pvAccess to an IOC Emmanuel Mayssat; Next: Re: Stream device: how to send waveform of chars without null terminator? Ralph Lange; 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: Fwd: EPICSv4 and pvAccess to an IOC White, Greg; Next: Re: Stream device: how to send waveform of chars without null terminator? Ralph Lange; 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, 16 Dec 2015