Experimental Physics and
Industrial Control System

Mark Rivers <[email protected]> · Thu, 30 May 2013 11:43:01 +0000

This error:

drvAsynSerialPortConfigure("L0","/dev/ttyS0",0,0,0)
asynSetOption("L0", -1, "baud", "9600")
setOption failed tcsetattr failed: Input/output error

probably means either that /dev/ttyS0 does not exist, or you don't have permission to modify it.

Do 

ls -l /dev/ttyS0 

to check the permissions.

Mark

________________________________________
From: [email protected] [[email protected]] on behalf of Vahe Sahakyan [[email protected]]
Sent: Wednesday, May 29, 2013 11:48 PM
To: Eric Norum
Cc: EPICS Tech-Talk
Subject: Re: Gauge controller with R232 serial port

Hello,

Thank you for your reply. According to your suggestion, we followed the
steps described in the stream device documentation
(HowToDoSerial(StreamDevice)) and  try to run the example, but we got an
error:

drvAsynSerialPortConfigure("L0","/dev/ttyS0",0,0,0)
asynSetOption("L0", -1, "baud", "9600")
setOption failed tcsetattr failed: Input/output error
asynSetOption("L0", -1, "bits", "8")
setOption failed tcsetattr failed: Input/output error
asynSetOption("L0", -1, "parity", "none")
setOption failed tcsetattr failed: Input/output error
asynSetOption("L0", -1, "stop", "2")
setOption failed tcsetattr failed: Input/output error
asynSetOption("L0", -1, "clocal", "Y")
setOption failed tcsetattr failed: Input/output error
asynSetOption("L0", -1, "crtscts", "Y")
setOption failed tcsetattr failed: Input/output error
asynOctetSetInputEos("L0", -1, "\n")
asynOctetSetOutputEos("L0", -1, "\n")
asynSetTraceIOMask("L0",-1,0x2)
asynSetTraceMask("L0",-1,0x9)

and also when I type dbior "stream" command in epics I get the following
output:
  Driver: stream
   StreamDevice 2.6.0 built May 13 2013 15:00:53
   registered bus interfaces:
     DebugInterface
     DummyInterface.

Can you help me to resolve this problems?
In the Tech-talk I found some notes about the last output where it is
suggested to make some changes in the CONFIG_STREAM file, but I could not
find such file in my directories. Where it is located?

Thanks in advance,
Vahe.

> Agreed -- and please note that recent versions of the ASYN support module include a tutorial on using StreamDevice to communicate with a device.
>
> On May 22, 2013, at 1:28 AM, Ralph Lange <[email protected]> wrote:
>
>> Hello Vahe,
>>
>> I would strongly suggest using StreamDevice [1] to interface such a device.
>> This approach will be much easier and faster. Writing a protocol file for your device is basically all you will have to do.
>>
>> ~Ralph
>>
>
> --
> Eric Norum
> [email protected]
>
>

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System