Experimental Physics and
Industrial Control System

> I'm trying to use the relatively new 64 bit records in EPICS base..
> The output of 'camonitor sixtyfour', however, stops updating as the value grows beyond 0x87654321:

The reason is this section in int64inRecord.c:

/* DELTA calculates the absolute difference between its arguments
 * expressed as an unsigned 32-bit integer */
#define DELTA(last, val) \
    ((epicsUInt32) ((last) > (val) ? (last) - (val) : (val) - (last)))

It only checks for changes in the lower 32 bits of the value.
Maybe the motivation was to always perform an _unsigned_ comparison, but "UInt32" was copy/pasted instead of "UInt64"?

-Kay

Replies:

Re: int64in record not sending monitors for larger value changes Johnson, Andrew N. via Tech-talk

References:

int64in record not sending monitors for larger value changes Kasemir, Kay via Tech-talk

Navigate by Date:

Prev: int64in record not sending monitors for larger value changes Kasemir, Kay via Tech-talk

Next: Re: int64in record not sending monitors for larger value changes Johnson, Andrew N. 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: int64in record not sending monitors for larger value changes Kasemir, Kay via Tech-talk

Next: Re: int64in record not sending monitors for larger value changes Johnson, Andrew N. 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