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Subject: How to turn off spewing messaging from asyn/stream devicse.
From: "Luchini, Kristi L." <luchini@slac.stanford.edu>
To: "'tech-talk@aps.anl.gov'" <tech-talk@aps.anl.gov>
Date: Thu, 9 Nov 2017 20:21:14 +0000
Hello,

I have a serial device that uses streamdevice,  from a CALC record, with the SCAN file set to "I/O Intr".   The device has  a simple interface, in that it can only send data once per second, and that's it.

record(calcout, "$(BL)GammaDoseRate") {
  field(DESC, "gamma dose rate")
  field(DTYP, "stream")
  field(OUT,  "@$(proto) read($(BL)) $(PORT)")
  field(SCAN, "I/O Intr")
  field(CALC, "A<8388608 ? 0.01*A : 0.01*(8388608-A)")
# .A is filled in by $(proto)
# SDIS is for alarm propogation only
  field(SDIS, "$(BL)GammaHeartBeat CP MS")
  field(EGU,  "mR/hr")
  field(PREC, "2")
  field(HOPR, "10.0")
  field(LOPR, "-1.0")
  field(HIGH, "$(HIGH=0.5)")
  field(HYST, "$(HYST=0.02)")
  field(HSV,  "MINOR")
  field(FLNK, "$(BL)GammaCommCheck")
}

For this application I have the asyn options set to disconnect on a read timeout and to autoConnect.

drvAsynIPPortConfigure("GAMMA_B44_12" ,"${TS_NODE}:2107",0,0,0)
asynSetOption("GAMMA_B44_12", 0, "disconnectOnReadTimeout", "Y")

If this devices gets a read timeout, the driver sends an error message to the IOC console, and the device does disconnect. Next the driver tries to reconnect a second later,  at which time I get another timeout and error message, and thus begins the flood of messages to the console.

2017/11/09 11:44:15.178742 GAMMA_B44_12 BSOIC:B44:12:GammaString: I/O error after reading 0 bytes: ""
2017/11/09 11:44:15.178756 GAMMA_B44_12 BSOIC:B44:12:GammaString: Protocol aborted
2017/11/09 11:44:16.178952 GAMMA_B44_12 BSOIC:B44:12:GammaString: asynError in read. Asyn driver says: ts-b044-pp01:2107 disconnected:
2017/11/09 11:44:16.178979 GAMMA_B44_12 BSOIC:B44:12:GammaString: I/O error after reading 0 bytes: ""
2017/11/09 11:44:16.179003 GAMMA_B44_12 BSOIC:B44:12:GammaString: Protocol aborted

I can setup the database to turn off these messages after a period of time by setting  "noAutoConnect".  However, I'd like to instead do the following:

1) set autoConnect
2) configure the rate at which the auto reconnection is attempted,
3) turn on/off the error messages sent to the console.

Is this possible?

Regards,
 Kristi




Replies:
RE: How to turn off spewing messaging from asyn/stream devicse. Mark Rivers

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