Re: modifying line state manually on ttyS

[Sergei Organov <osv@javad.ru>]

Michael Buesch <freesoftwaredeveloper@web.de> writes:
> Hi.
> 
> I have asked in many other mailing-lists, but I got no good
> solution for my problem, so I try to ask here, although it may
> not be the exaclty correct list for it.
> 
> I have developed my own device, that is connected to ttyS0.
> To talk to my device, I need to set the state of the TxD line
> manually to either 0 or 1 (+12v or -12v). What I try to say is,
> I don't want to write a whole byte to the port, but only one single
> bit, that then stays persistent on the line, until I reset its state.
> Better sayed, I want to handle TxD line, like it's possible for
> DTR-line for example.

Do ioctl(fd, TIOCSBRK, 0) / ioctl(fd, TIOCCBRK, 0) help?

-- 
Sergei.