Serious things

[Tom Burrell]

Thanks for the response. After several days of research I have come to
the conclusion the answer in no.  So thh thing I need to do make things
in that area as real time as possible.
Tom  
On Mon, 2005-10-31 at 18:48 -0700, Kevin Brown wrote:
> > OK I will repeat my question: Does Linux have a driver flag to toggle
> > the RTS signal when there is data in the transmit buffer, similar to
> > the Windows mode comX: rts=tg? This is very handy in RS-485 networks.
> > All too often the Big system is busy and doesn't disable the
> > transmitter soon enough to suit the embedded end. (i.e. its not real
> > time.)
> 
> Kenneth's response to your last request:
> 
> "More information is needed.  You don't specify what does the
> transmission and what kind of access you have to turn rts off.  You also 
> don't specify what "rapidly" means.  Fast in the frame of human 
> consciousness (e.g. 2 seconds), or fast in the realm of what the 
> computer could do (e.g. milliseconds).
> 
> Since you mention gcc, I'll assume you have a C or C++ program that does 
> the transmission.  If this is incorrect, ignore the remainder of the 
> reply  :)
> 
> The only way you would have access to something like this from inside 
> the program is through the driver.  You may already have opened the 
> serial device and are using the driver to send the transmission.  The 
> driver should have some provision (I would suspect an ioctl call, but I 
> haven't used a serial driver this way, so wouldn't know without research).
> 
> There could be many different answers depending on what you have and 
> where the control is done."
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-- 
Tom Burrell <tburrell at southwestmicrowave.com>
Southwest Microwave