EPICS Home EPICS Controls Argonne National Laboratory

Experimental Physics and
Industrial Control System

Format page
for printing


Search Tech-talk
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: EPICS on ARM (continued)
From: Dirk Zimoch <[email protected]>
To: Dirk Zimoch <[email protected]>, Rod Nussbaumer <[email protected]>, EPICS tech-talk <[email protected]>
Date: Wed, 27 Oct 2010 10:13:13 +0200
[email protected] wrote:
Rod, Dirk,

I was able to compile and build the libs for my arm platform.
To my surprise the catools (caget, etc) are not built (only the libs are)
I don't need them for my iocs, but would be nice to have them for troubleshooting.
(my arm linux is the etch debian version, i.e. in theory I could ssh to it and caget from
it). What is the directive to build the <top>/bin/linux-arm_el ?

Obviously the files are built on my linux x86_64 machine.
But how does the arm access those files, i.e what is common practice?
1/ Do you nfs mount the partition on the arm and access the lib from there?
2/ Do you copy the files on the arm? scp, ftp, unison, etc...
3/ Do you nfs mount the arm and build on local machine?

I would prefer my embedded system to be standalone. So 2 and 3 seem to make sense.
But what do you/others do?

Thanks,


I would implement 1 and 2. 1 is easier for development. Once you have implemented 1 then 2 is easy because you can copy locally on your arm system from nfs to local disk. I would use a symbolic link for iocBoot to switch between nfs and local disk. If you use automount for nfs, you don't even need to worry what happens to your nfs mounts when you run standalone and the server is not available. As long as you don't use the drive it will not be mounted. If your system supports the /net automount facility, it becomes very easy: just set the link to /net/servername/remotedir to boot from nfs.

If 2 makes sense depends on the size of the local disk. With tiny flash drives it becomes difficult. With modern solid state drives or even real hard disks, it is not a problem.

Normally I don't build on the local machine. But it depends. If it is large enough to have the compiler installed and you build locally, then your EPICS_HOST_ARCH is linux-arm* and it is not treated as a cross build. And you will automatically have caget etc.

In src/catools/Makefile you find:
LIBRARY_HOST += catools
PROD_HOST += caget camonitor cainfo caput

This builds caget etc only for the host, not for the cross targets.

To build the tools for all cross Linux IOCs, you may try to add:
LIBRARY_IOC_Linux += catools
PROD_IOC_Linux += caget camonitor cainfo caput

I don't know if that works. And I don't know if it is possible to enable this in one of the configure files instead of hacking in src. I guess that is is possible with some advanced Makefile programming.

Dirk

Replies:
Re: EPICS on ARM (continued) emmanuel_mayssat
References:
RE: Thread model for EPICS on ARM CPU michael.abbott
Re: Thread model for EPICS on ARM CPU Rod Nussbaumer
EPICS on ARM (continued) emmanuel_mayssat
Re: EPICS on ARM (continued) Dirk Zimoch
Re: EPICS on ARM (continued) emmanuel_mayssat
Navigate by Date:
Prev: Re: ChannelArchiver build problem with 3.14.11 on Suse linux Burkhard Kolb
Next: RE: EPICS CA problems Mark Rivers
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: EPICS on ARM (continued) emmanuel_mayssat
Next: Re: EPICS on ARM (continued) emmanuel_mayssat
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, 27 Oct 2010 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·