Thanks Jim!! you are right, it was the getty!!
So annoying I spent 6 hours trying to figure that out and all I had to do was
disable the getty.
Thanks
--- In Jim Jackson <> wrote:
>
>
> It sounds like you have getty running on that line, ps should tell you.
> Disable the getty from running by editing your /etc/inittab file
> and sending hup to init.
>
> If that's not the case you will have to configure the relevant serial
> characteristics. Serial programming advice under Linux (and other unices,
> it's all much the same) is generally available on the web.
>
> On Sun, 21 Feb 2010, tsao.terence wrote:
>
> > Hi,
> >
> > I am using a TS7260's COM2 to connect to another PC to do basic serial
> > communication. Every time when I receive (RXD) a character from COM2, the
> > system automatically sends out (TXD) the same character. Why does it do
> > that?
> >
> > I know that was happeneing because I probed the RXD pin and I saw the
> > exact waveform from the TXD pin.
> >
> > When I typed stty -a </dev/ttyAM1, I see the following:
> > speed 9600 baud; rows 0; columns 0; line = 0;
> > intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>;
> > eol2 = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R; werase = ^W;
> > lnext = ^V; flush = ^O; min = 1; time = 0;
> > -parenb -parodd cs8 hupcl -cstopb cread clocal -crtscts
> > -ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr -icrnl -ixon
> > -ixoff -iuclc -ixany -imaxbel
> > -opost -olcuc -ocrnl -onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0
> > vt0
> > ff0
> > -isig -icanon -iexten -echo -echoe -echok -echonl -noflsh -xcase -tostop
> > -echoprt -echoctl -echoke
> >
> > as you can see the echo is disabled, how do I disable internal echoing? So
> > I won't transmit the data when I just received.
> >
> > Thanks
> >
> >
>
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