RE: Handling RTS

["Chris Doré" <cdore@connecttech.com>]

> From: linux-serial-owner@vger.kernel.org [mailto:linux-serial-
> owner@vger.kernel.org] On Behalf Of JZabalza@cemitec.com
> Sent: January 10, 2008 3:27 AM
> To: linux-serial
> Subject: RE: Handling RTS
> 
>         Thanks for your response. I have a PC, so dmesg said
> 
>                 serial8250: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A
> 
>         How I said, I just handle RTS but from userland. This means a big
> latency between RTS activation and begin out data. I want only reduce this
> latency activating RTS on driver. My question is, is this *protocol*
> implemented actually or I must implement them.

I'm not an expert on the current 8250 driver, but I believe you will have to
implement your 485 control.

We may have done this in one of our drivers, but in my quick search I can't
find one that doesn't take advantage of the extra features supplied by the
UARTs we use.


Best of luck, Chris