Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  <19951996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  Index 1994  <19951996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020 
<== Date ==> <== Thread ==>

Subject: Re: IOC time 1min=90sec ??
From: winans@aps.anl.gov
Date: Mon, 16 Jan 95 13:50:35 -0600
Hmmmm that is 33.3333333333333333333% off the expected speed.  I find
it interesting to note that 33 is 33.33.3333333333333333333% more than
25.  I don't fully understand your entire note.  But I suspect that you
have a 33mHz mvme167 board that has its vxWorks configured for a 25mHz
board.


There is a comment in config/mv167/target.nr:

    SPECIAL CONSIDERATIONS

    The value of the CPU clock speed, e.g., 25 MHz or 33 MHz, needs to
    be written into NVRAM.  NV_CPU_SPEED is defined in config.h as the
    address for this value (0xfffc00fe).  The location (NV_CPU_SPEED + 1)
    is used to validate the contents of NV_CPU_SPEED.  If this location
    contains 0xee then the contents of NV_CPU_SPEED will be used,
    otherwise 25 MHz will be used as the CPU speed.  If this value is
    not set properly, the registers initialized with this value will be
    wrong.

I don't exectly know how to set the value in the NVRAM to to proper
value, but that would be the nice way to fix the problem...  Otherwise
you will have to change the hard-coded clock rate settings in sysLib.c.
Grep for 'cpuSpeed' in sysLib.c to find the line(s) of interest.  (WRS
blew it, the value on the assignment should be #define'd.)


--John

Navigate by Date:
Prev: TS - EAST from GMT Gabor Csuka, DESY - Germany
Next: IOC time 1min=90sec ?? Gabor Csuka, DESY - Germany
Index: 1994  <19951996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020 
Navigate by Thread:
Prev: Re: IOC time 1min=90sec ?? Marty Kraimer
Next: IOC time 1min=90sec ?? Gabor Csuka, DESY - Germany
Index: 1994  <19951996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020 
ANJ, 10 Aug 2010 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·