[Tutor] question about serial coms

[nephish]

well thats encouraging, did you have to do anything special to prevent
an error when trying to read or write at the same time
?

thanks
sk


On Tue, 2005-11-15 at 09:29 +1300, Hans Dushanthakumar wrote:
> Ive worked on a similar application. I used one thread to read from the serial port and another one to handle the writes. 
> 
> -----Original Message-----
> From: tutor-bounces at python.org [mailto:tutor-bounces at python.org] On Behalf Of Hugo González Monteverde
> Sent: Tuesday, 15 November 2005 7:36 a.m.
> To: nephish
> Cc: tutor
> Subject: Re: [Tutor] question about serial coms
> 
> Hi Nephish,
> 
> Are you using pyserial or rolling your own? Normally you can write and read to the /dev/ttySXX file at the same time; since they're special files, not ordinary files, the driver handles that.
> 
> Handling both writing and reading in your program's flow control is a wholly different matter, though. You might  need to use select()  to avoid blocking.
> 
> Are you using two completely different scripts for reding and writing?
> 
> There is some valuable info, if not about python, in the Serial Programming howto, at:
> 
> http://www.tldp.org/HOWTO/Serial-Programming-HOWTO/
> 
> 
> Hugo
> 
> nephish wrote:
> > Hey there,
> > 	i am developing on a linux computer with the serial module. Now, i 
> > already am able to recieve info from a serial RS232 device and process 
> > everything ok. What i need to do now is write to the serial device, 
> > but i also need to be able to not interrupt the script that is reading 
> > from it.
> > 	I guess my question is, do i have to interrupt the reading script to 
> > write to the same RS232 device ?
> > 	and if so, how do i do that?
> > 
> > 	thanks,
> > 	shawn
> > 
> > _______________________________________________
> > Tutor maillist  -  Tutor at python.org
> > http://mail.python.org/mailman/listinfo/tutor
> > 
> _______________________________________________
> Tutor maillist  -  Tutor at python.org
> http://mail.python.org/mailman/listinfo/tutor