[ECOS] wiggle with the CTS pin

Giri Raja giri_amf@yahoo.com
Thu Aug 5 18:28:00 GMT 2004

Thanks for the response. Thats right, when I meant
CTS, its for the remote end. Currently I'm using the
serialB. maybe I can shift the debug port to serialB
and switch the COM stuff to serialA. So if it is the
serialA, how do I do it?

Thank you very much.


--- Nick Garnett <nickg@ecoscentric.com> wrote:

> Giri Raja <giri_amf@yahoo.com> writes:
> > Hi,
> >    I need to send a 'LO' signal to the CTS pin in
> one
> > of my serial ports, on an EB40A board. Is there
> any
> > API to do this?
> > there was an email on this issue last month --
> >
> > 
> > just wanted to know if anything exists already.
> You have the basic problem here that the RTS/CTS
> lines on the EB40A
> serial connectors are not controllable. Those on
> serial A are
> connected together, so RTS just reflects CTS, and
> they are not
> connected at all on serial B. Even if they were
> controllable, it would
> have to be via PIO pins since the AT91 USARTs do not
> support anything
> other than TXD and RXD.
> Also, when you say CTS, I guess you mean the CTS
> input to the remote
> end of the line, which should be the RTS output at
> this end. So, if
> you use serial A and get your remote end to hold its
> RTS low, then the
> reflected CTS will be low too.
> -- 
> Nick Garnett                    eCos Kernel
> Architect
> http://www.ecoscentric.com/     The eCos and RedBoot
> experts

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