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Re: [ts-7000] Having trouble with com3 port on a 2760

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Subject: Re: [ts-7000] Having trouble with com3 port on a 2760
From: Eddie Dawydiuk <>
Date: Tue, 05 Jun 2007 09:29:18 -0700
Hello,

> Hello everyone. I'm having some trouble with com 3 on a 7260 board.
> I've got the driver kernel modules loaded, and am able to start a
> getty process on the port via:
> 
> getty -L ttyTS0 57600 vt100
> 
> With that, as expected, the login prompt is presented on the terminal
> that's attached (minicom on my laptop over a seral->usb cable attached
> to the pigtail that came from TS). The trouble is that when I try to
> log in nothing I type into the terminal appears to be making it to
> through the port. If I attach the serial cable to com 0 on the ts7260
> and fire up a getty process on ttyAM0 with the same settings, I'm able
> to log in without trouble. The settings on the port (as reported by
> stty) are: 
> 
> root# stty -F /dev/ttyTS0
> speed 57600 baud; line = 0;
> min = 1; time = 0;
> -brkint -icrnl -imaxbel
> -opost -onlcr
> -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke
> 
> These settings are identical to what's set on ttyAM0. 
> 
> I've tried lots of different combinations of flow control settings,
> different baud rates, etc, and I just can't get beyond this issue. At
> this point I'm convinced I'm either overlooking something so simple it
> hasn't occurred, or there's something wrong with the port. 
> 
> Any ideas on what to try next? I'm at a bit of a loss. 

In your terminal emulator ensure hardware and software flow control is 
disabled. You can also short pins 2 and 3 to test your cable, it should 
create a loopback cable by looping the two pins.

-- 
Best Regards,
________________________________________________________________
  Eddie Dawydiuk, Technologic Systems | voice:  (480) 837-5200
  16610 East Laser Drive Suite 10     | fax:    (480) 837-5300
  Fountain Hills, AZ 85268            | web: www.embeddedARM.com


 
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