Ugh, top-posting. Reformatted... On Tue, 23 Aug 2005, pppd wrote:
> De: [EMAIL PROTECTED] > Para: "pppd" [EMAIL PROTECTED] > Cópia: [EMAIL PROTECTED] <http://cygwin.com/acronyms/#PCYMTNQREAIYR>. Thanks. > Data: Tue, 23 Aug 2005 15:08:59 -0400 (EDT) > Assunto: Re: 1.5.18 ( 0.132/4/2 ) - read() - blocks ( serial programming ) > > > On Tue, 23 Aug 2005, pppd wrote: > > > > > Hello guys, > > > > > > I´m working to convert a Linux application to work with > > > Windows XP under Cygwin 1.5.18 ( 0.132/4/2 ). Ncurses package and > > > parallel port programming works without changes ( congratulations ). > > > I have a problem with serial programming. > > > > > > First, I did two C files: ( attached ) > > > > > > setcmc7.c - Sets serial configuration through Win32 API. ( > > > Linux termios settings/functions doesn't work for me :-( ). > > > cmc7.c - Read caracters from serial. > > > > > > After setting serial configuration by setcmc7.c I can read serial port > > > using cmc7. > > > > > > My doubt is: Why read() function blocks the terminal (keyboard) until > > > read a caracter ? At Linux it's work fine ( same code ). > > > > > > My application needs to read keyboard at the same time with serial. > > > I have tried some flags with open ( O_NONBLOCK, O_NDELAY .. ) > > > unfortunately doesn't work too. > > > > > > Does anybody can help me please? > > Igor, > > Thanks for your advice. > > > I doubt the same code works on Linux, since open("COM1") will fail > > there. > > It's work, of course we´ll need change "COM1" for "/dev/ttyS0" and will > work on Linux. Then why not use "/dev/ttyS0" on Cygwin? > > You need to open something that Cygwin knows is a serial port, i.e., > > "/dev/ttyS0" (or "/dev/com1", but not "COM1"). > > I already tried it with /dev/ttyS0 and /dev/COM1 but doesn't work > too. Please post the exact program that doesn't work for you (and that uses the known Cygwin serial device). > Unfortunately keeping blocking my keyboard. Do you have an example > "without block" for serial ? I don't understand what "without block" means. What is blocking? Again, please post *code*, with expected results and actual results. > BTW, "COM1" works for me like "/dev/com1" and "/dev/ttyS0" on Cygwin. No it doesn't. You may think it does, because it still communicates with the serial port, but as far as Cygwin is concerned, "COM1" is a *file*, not a serial device, so you won't be able to set any serial parameters, and the behavior is going to be unpredictable. > > Plus, you can probably write setcmc7.c using Cygwin calls as well > > (instead of Win32, that is). > > Igor > > Keeping blocking.. :( > Could you help me ? When you have posted a small reproducible testcase, people will try it out on their machines to determine whether this is a general Cygwin issue, or something with your local configuration. But until we have the testcase, it's impossible to debug this problem. HTH, Igor -- http://cs.nyu.edu/~pechtcha/ |\ _,,,---,,_ [EMAIL PROTECTED] ZZZzz /,`.-'`' -. ;-;;,_ [EMAIL PROTECTED] |,4- ) )-,_. ,\ ( `'-' Igor Pechtchanski, Ph.D. '---''(_/--' `-'\_) fL a.k.a JaguaR-R-R-r-r-r-.-.-. Meow! If there's any real truth it's that the entire multidimensional infinity of the Universe is almost certainly being run by a bunch of maniacs. /DA
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