Experimental Physics and
Industrial Control System

Eric Norum <[email protected]> · Wed, 6 Jun 2007 09:10:29 -0500

Make sure that the account running the EPICS/ASYN application has
read/write privileges to the special file.

chmod 666 /dev/ttyS0
Or, if you want to restrict the access to a particular account:
	chown zhangdemin99 /dev/ttyS0
	chmod 600 /dev/ttyS0

Also, are you sure that you have the serial port name right in your
startup command (st.cmd) file? Your message shows a backslash at the
beginning of the name -- is this just a typo when you created the
posting to tech-talk?
On Jun 5, 2007, at 9:18 PM, zhangdemin99 wrote:
Dear all,

I have built ASYN on my computer, but there are some problems
when running application. It said: \dev/ttyS0 can't open Permission
denied

Should I open the serial port in the Linux first or is there
another problems? what should I do next?
many thanks in advance.
 demin zhang

一 起 来，150 万 人 同 时 在 玩 的 梦 幻 西 游

--
Eric Norum <[email protected]>
Advanced Photon Source
Argonne National Laboratory
(630) 252-4793

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System