Re: How to Read Multiple Values using StreamDevice with array_in

[Dirk Zimoch <dirk.zimoch@psi.ch>]

Hello Yasemin

On 07.10.2013 10:03, Yasemin Barutçu wrote:
> Hello,
>
> I have a self-produced thermocouple and I connect to this device by RS 232.
> I want to read 6 different integers when I send "MEASC" command to the
> device.
>
> in thermo.proto file, if I define %s, I can read all data by stringin.
>
> MEASC{
>      out "MEASC";
>      in "%s";
> }
>
> Example:
> 2013/10/07 10:59:53.633 192.168.1.198:9001 <http://192.168.1.198:9001>
> write 6
> MEASC\n
> 2013/10/07 10:59:53.647 192.168.1.198:9001 <http://192.168.1.198:9001>
> read 8
> 029 030 029 028 028 028
>
>
> But I want to take all 6 datas in integer format. I search the
> streamdevice documentation and I found the following line.

There several possibilities to do this.

> MEASC{
>      out "MEASC";
>      array_in {separator=" "; in "%d";}
> }
>
> But it doesn't work. I got the following error.

No that does not work. What you wanted to do is:
MEASC{
    separator=" ";
    out "MEASC";
    in "%d";
}


But then you get an array of 6 values. Maybe you want to have the 6 
values in separate records. You can do this using redirected input:

MEASC{
    out "MEASC";
    in "%d %(\1:TEMP2)d %(\1:TEMP3)d %(\1:TEMP4)d %(\1:TEMP5)d 
%(\1:TEMP6)d";
}

Called from a record like this:
record (ai, "$(P):TEMP1") {
    field (DTYP, "stream)
    field (INP,  "@thermo.proto MEASC($(P)) $(PORT)")
}

And 5 passive records like this:
record (ai, "$(P):TEMP2") {
}
record (ai, "$(P):TEMP3") {
}
record (ai, "$(P):TEMP4") {
}
record (ai, "$(P):TEMP5") {
}
record (ai, "$(P):TEMP5") {
}

Note that the 5 passive records have no "stream" support (in fact they 
use "Soft Channel" or if you wish you can use "Raw Soft Channel").

Dirk