StreamDevice "in" command disturbed by out command

[haquin <haquin@ganil.fr>]

Hi All,

I am using StreamDevice with Asyn TCP connection to control a power supply.
I have some periodic read (power ON/OFF or Ready/Fault or Local/distant)
 and commands (switch power ON/OFF or reset) can be send asynchronously.

My problem is that periodic reads are disturbed because they also receives the strings of the asynchronous commands.
In such case the record goes temporarily into CALC INVALID state.

Following is the message I can have when I issue Power ON command (the record reading the local/distant status is disturbed)
TCP_BPI TST-BPI:Ctrl: Input "DCP=1" mismatch after 0 bytes
TCP_BPI TST-BPI:Ctrl: got "DCP=1" where "REM/" was expected

How could I have the periodic read not being disturbed by asynchronous commands ?

thanx in advance for your help.

here is an example of my records/protocol:

#####################################################
record(bi, "$(EQPT):Ctrl") {
  field(SCAN, "1 second")
  field(DTYP, "stream")
  field(INP, "@alimISrc_SerialProtocol.db getRem TCP_BPI")
  field(ZNAM, "LOCAL")
  field(ONAM, "DISTANT")
}

getRem{
  out "REM/";
  in "REM/%u";
}
#####################################################
record(bo, "$(EQPT):PwrCmdOut") {
  field(SCAN, "Passive")
  field(DTYP, "stream")
  field(OUT, "@alimISrc_SerialProtocol.db setPwr TCP_BPI")
  field(ZNAM, "OFF")
  field(ONAM, "ON")
}

setPwr{
        out "%{DCP=0|DCP=1}";
    }
#####################################################

--
Christophe Haquin
Control and Real Time systems Engineer

+33 231454661 office
+33 231454728 fax
SdA/GIM
GANIL
Bd Henri Becquerel BP 55027
14076 CAEN CEDEX5

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