I have an application where I need to communicate with some simple controllers via serial commands. I have a package to do the low level open,read,write, and close tasks for a tty port that I have been using for a number of years under Solaris using the standard POSIX tty calls.
My problem is that when attempting to open /dev/ttyS0, I get a permission denied error. I get the same error when attempting to open /dev/com1. Curiously, the open works when opening "com1" but the tcgetattr () call then fails with a not a typewriter error (presumably ENOTTY). I can manually communicate with the controllers via hyperterm. My configuration is uname -a output: CYGWIN_NT-5.0 dlsppc 1.5.5(0.94/3/2) 2003-09-20 16:31 i686 unknown unknown Cygwin The windows system is: Windows 2000 Professional Ver 5.0 Build 2195 Service Pack 4 built on a FAT32 partition. I have noted several similar problems with opening serial ports in the archives but have not see anything regarding this being resolved. Any suggestions would be appreciated. ---Craig ________________________________________________________________________ Craig A. Gullixson Instrument Engineer INTERNET: [EMAIL PROTECTED] National Solar Observatory/Sac. Peak PHONE: (505) 434-7065 Sunspot, NM 88349 USA FAX: (505) 434-7029 -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
