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Subject: Re: string fanout or stringout after conditional check?
From: Jeong Han Lee <citadel.lee@gmail.com>
To: Eric Norum <eric@norum.ca>
Cc: tech-talk@aps.anl.gov
Date: Thu, 18 May 2017 17:22:45 +0200
Hi Eric,
On 05/18/2017 05:08 PM, Eric Norum wrote:
To guard against buffer overrun issues it’s best to specify a maximum
length in the protocol entry:
read_raw
{
   in “%39c";
}

  Thanks for your comments.


Or, if the input terminator is set to a single ‘\r’ or ‘\n’ and the
device sends a "\r\n” you could use:
read_raw
{
   in “%39[^\r\n]";
}

  By the way, I have the terminator in "st.cmd" as follows:

  asynOctetSetInputEos("L0", 0, "\r\n")

  Thanks,
  Han



On May 18, 2017, at 6:37 AM, Jeong Han Lee <citadel.lee@gmail.com
<mailto:citadel.lee@gmail.com>> wrote:

 I have the bar code scanner, so, the string input is the arbitrary
ascii and numbers from bar codes, generated by myself, whenever I scan
 it.

 For example,

 case 1 : user,123456789,U002C007
 case 2 : ABCDEFGHIZ0123456789
 case 3 : office,248795493,M01B21
 case 4 : ....

 case N : SUBMIT

 Note that case 1..N-1 can be done without order.

 The scanner has a typical RS232 connection. I wrote the very simple
IOC with asyn and Stream. It has only one record and one function in
db and proto file as follows:

--- snip snip ---

record(stringin, "$(SYSDEV)RawScanData")
{
   field(DESC, "RAW Scanned data")
   field(DTYP, "stream")
   field( INP, "@scanner.proto read_raw $(PORT)")
   field(SCAN, "I/O Intr")
   field(PINI, "YES")
}

read_raw
{
   in "%s";
}
--- snip snip ----------

 Is this enough?

  Thanks,
  Han

--
Eric Norum
eric@norum.ca <mailto:eric@norum.ca>





Replies:
Re: string fanout or stringout after conditional check? Zimoch Dirk (PSI)
References:
string fanout or stringout after conditional check? Jeong Han Lee
Re: string fanout or stringout after conditional check? Ralph Lange
Re: string fanout or stringout after conditional check? Jeong Han Lee
Re: string fanout or stringout after conditional check? Eric Norum

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