Re: Connect with various serial devices

[Michael Westermann <mw@microdata-pos.de>]

Hello,
On Thu, Dec 11, 2003 at 01:12:54PM +0100, Albert Cervera Areny wrote:
> Thanks for your suggestion, in fact now we can receive data from the note
> dispenser and see the 'Ok' response. We keep on beeing unable to use the
> other devices though. It seems that for some strange (to us) reason,
> devices are not receiving data correctly (as they would do the appropiate
> thing even if we didn't receive any response). Do you have any ideas on
> why the sent data shouldn't be received correctly by the device? I've
> looked at the speed, parity, CS and Bstop parameters but they are right.
> Could there be any other reason for that strange behaviour in some of the
> devices?
I think the Card-Reader need 9600/8bit/None Parity and CRTSCTS

t.c_cflag 		= baud|parity|bits|stop ;
t.c_cflag 		|= CRTSCTS;

Use tcdrain with caution, tcdrain blocks forever without a device ! 
better use in a timed loop;

ioctl(fd, TIOCOUTQ, &bytes)  bytes = bytes in outqueue

Michael