Re: [Gumstix-users] AudioStix and extra serial ports

[Justin M. P. <jmp@MIT.EDU>]

On Wed, May 10, 2006 at 07:15:50PM -0400, Chris Danis wrote:
> On 5/10/06, Justin Mazzola Paluska <jm...@mi...> wrote:
> >Unfortunately, we can't seem to access our device from either ttyS2 or
> >ttyS3.  Even attempting to locks up our GumStix, requiring a reboot.
> >We can replicate the lock up by catting /dev/ttyS3 too.
> 
> Justin,
> 
> Are you *sure* a reboot is required?  Are you turning off flow control?

Flow control is off.  To do my most recent test, I just connected the
ttyS3 rx wire to the ttyS3 tx wire and put some bytes on the serial
port.  It still locks up.  Or, at least, it drops my ssh connection
(via a wireless card in the CFStix).

Here's a transcript of what I ran:

----- Transcript Start ----
# ./S99SerialPorts start
9600
9600
# stty -F /dev/ttyS3 -ixon 115200
# cat /dev/ttyS3 &
# 
# 
# echo blah > /dev/ttyS3
# blah


*terminal stops responding and I can't ssh in again until I do a hard
reboot.* 
----- Transcript End ----

I'm using a kernel built from r682 of the SVN repository.  Could this
be a bug from using an old buildroot?
   --Justin