Hi,
I'm re-opening a somewhat old thread about serial flow control methods:
Russell King, le Wed 05 Jan 2005 23:53:01 +0000, a écrit :
> we have other people
> who want to use their on-board hardware RS485 flow control options on
> UARTs for their application, which means we need an RS485 flow control
> method. (They can't select it without accessing the hardware directly.)
>
> So, we now seem to have:
>
> Standard flow control
> CTVB flow control
> RS485 RTS flow control
Let's add a new one: Inka braille devices, which uses RTS/CTS as
acknowledge strobes for each character.
> I still believe that flow control should be enabled by CRTSCTS, but
> the flow control personality set by other means.
>
> Therefore, I think this requires further discussion, especially with
> Alan (who seems to be the tty layer god now) to work out some sort of
> reasonable interface.
How could this look like in userspace? Something like
#define CRTSCTS_RS232 0
#define CRTSCTS_RS485 1
#define CRTSCTS_TVB 2
#define CRTSCTS_INKA 3
int method = CRTSCTS_RS485;
ioctl(fd,TIOCMSFLOWCTRL,&method);
(and the converse TIOCMGFLOWCTRL)?
Regards,
Samuel
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