Experimental Physics and
Industrial Control System

Eric Norum via Tech-talk <tech-talk at aps.anl.gov> · Thu, 24 Sep 2020 09:34:46 -0700

I have a piece of equipment that returns an IEEE-754 floating point value expressed as a hexadecimal integer.  i.e. when the device returns the ASCII string
	0xbff9d411
it is sending the value
	-1.95178

So far the only way I can figure out how to handle this is to read the value into a ai record RVAL then use a subroutine record with a C union to do the conversion and then store the float value in the ai record VAL.  Is there a way to avoid the subroutine record?   I’m looking for sort of a combination of a %x and a %R StreamDevice format converter.

Thanks,
—
Eric Norum
wenorum at lbl.gov

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System