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Re: 1.5.18 ( 0.132/4/2 ) - read() - blocks ( serial programming )


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.

> 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.
Unfortunately keeping blocking my keyboard. Do you have an example "without block" for serial ?

BTW, "COM1" works for me like "/dev/com1" and "/dev/ttyS0" on Cygwin.


> Plus, you can probably write setcmc7.c using Cygwin calls as well (instead
> of Win32, that is).
> 	Igor

Keeping blocking.. :(


Could you help me ?

Best Regards,
Douglas Schilling Landgraf
---------- Cabeçalho original -----------

De: cygwin-owner@cygwin.com
Para: "pppd" pppd@terra.com.br
Cópia: cygwin@cygwin.com
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?
>
> --
> 				http://cs.nyu.edu/~pechtcha/
>       |\      _,,,---,,_		pechtcha@cs.nyu.edu
> ZZZzz /,`.-'`'    -.  ;-;;,_		igor@watson.ibm.com
>      |,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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