Experimental Physics and
Industrial Control System

"Mark S. Engbretson" <[email protected]> · Tue, 5 Apr 2016 09:00:46 -0500

This is most probably not going to work since unless the device is already
set to the same baud rate as your IOC, it will not even be able to
understand the commands that you are sending. If those setting are what you
IOC expects, you device has to be set to the same values before you even
start.

-----Original Message-----
From: [email protected] [mailto:[email protected]]
On Behalf Of ???
Sent: Tuesday, April 05, 2016 2:51 AM
To: [email protected]
Subject: set baud rate not work

Hi everyone,
   I have a strange question.
   I use the stream and asyn to control a device. epics 3.1.12.5,synApp_5_8.
   I set the baud of serial in 115200 in st.cmd with these commands:
*********
epicsEnvSet "TTY" "$(TTY=/dev/ttyS1)"
drvAsynSerialPortConfigure("L0","$(TTY)",0,0,0)
asynSetOption("L0",-1,"baud","115200")
asynSetOption("L0",-1,"bits","8")
asynSetOption("L0",-1,"parity","none")
asynSetOption("L0",-1,"stop","1")
asynSetOption("L0",-1,"clocal","Y")
asynSetOption("L0",-1,"crtscts","N")
asynOctetSetInputEos("L0",-1,"\r\n")
asynOctetSetOutputEos("L0",-1,"\r\n")
asynSetTraceIOMask("L0",-1,0x2)
asynSetTraceMask("L0",-1,0x9)
***********
   Then I start the st.cmd and communicate it with another xp computer,
using Serial port assistant.
I found that I received the right information only when I set the baud rate
was 9600. It get nothing when the baud rate was 115200. 
And it should be 115200, I failed when i used it in device directly.
I did set it was 115200 in st.cmd, why it did not work.

Thanks,
Liang yx

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System