Re: Formatting StreamDevice input

[Elmer Pensack <pensacke@gmail.com>]

Thanks all for the suggestions. I was able to successfully get the time string formatted using scalcout. I'm sure I'll have more questions when I look into the %T option to convert to seconds, but in the meantime I hit another snag.

Embedded in that same block of data is a smaller block of seven status words. The status words have no separators. They come in like this: 82918020303030. This represents seven hex values: x82, x91, x80, x20, x30, x30, and x30.

If I use the %D option and read them as binary coded decimals it works, as long as the values contain only 0-9. As soon as the x80 changes to an x8a status I get a CALC INVALID error. Reading the documentation, that makes sense for %D. So I tried using a %x, %i, %d, and every optional flag I could think of trying, including widths. But the only result I get is 0. I can't seem to read the values unless I use %D. Any ideas?

Here is my protocol:

getStatusWords
{
   in STX 5 "%D%(STATUS2)D%(STATUS3)D%(STATUS4)D%(STATUSWORD5)D%(STATUS6)D%(STATUS7)D";
}

This populates the seven PVs. The STX is the "next field" indicator and the 5 indicates that the field is for status words.

Here's the PVs I've defined:

record(longin, "STATUS1")
{
   field(VAL, 0)
   field(DTYP, "stream")
   field(INP,  "@cdg4200.proto getStatusWords CDT")
   field(SCAN, "I/O Intr")
}
record(longin, "STATUS2")
{
   field(VAL, 0)
}

Same for STATUS3 - STATUS7.

All input is unsolicited. It comes in continuously every second.

Thanks in advance!

Elmer Pensack