Re: [Gumstix-users] Tweener console setup - now with robostix ffuart fun

[Dales, M. W <mic...@in...>]

Hey there,

As an alternative, I tried using the FFUART port on the robostix board I
have to get the console. I wired up just gnd/tx/rx this time, and booted
a gumstix connect 200xm and a robostix.=20

This time I get gibberish over the terminal, as seen here:

http://homepage.mac.com/mdales/gibberish.png

It's repeatable gibberish, so it strikes me that my terminal settings
are wrong, but I've set my terminal to 115200 8n1 as recommended here:

http://docwiki.gumstix.org/Replacing_the_filesystem_image

I also tried different speeds and such. I have both hardware and
xon/xoff flow control turned off. Still no good.

Anyway, it strikes me as slight progress :) Any suggestions welcome!

-- Michael

>-----Original Message-----
>From: gum...@li...=20
>[mailto:gum...@li...] On Behalf=20
>Of Dales, Michael W
>Sent: 13 September 2006 11:18
>To: gum...@li...
>Subject: [Gumstix-users] Tweener console setup
>
>Hi there,=20
>
>I've been trying to setup a serial console for my gumstix so I=20
>can flash
>it. The current setup I have is a gumstix connect-200xm, a tweener
>board, and a GPSstix. I'm using the usb port on the gpsstix to connect
>to the gumstix over usbnet.
>
>I soldered up a serial null modem type cable which connets a 9 pin
>female connector to an 8 pin DIN connector. Looking at this picture:
>
>http://www.gumstix.org/schematics/B00002-FFUART.png?nocache=3D1
>
>And looking at the tweener board itself it appears only TX,=20
>RX, GND, and
>sheild are need on the serial line. So I only connected those lines up
>(my soldering is very rusty, so this was an attempt to save me time).
>
>Using Tera Term Pro on Windows as my termainl program, I don't see any
>output from the board when I plug in the usb cable (which powers up the
>gumstix). I know the gumstix does boot as I can still ssh into it over
>usb.
>
>Interestingly enough, when ssh'd in I can do "cat /dev/ttyS0" and I see
>what I type into Tera Term Pro on the PC come out on the gumstix. This
>suggests that my connection of the cable isn't bad, at least on the TX
>side. When I try to do "cat > /dev/ttyS0" I cat the error "cat: Write
>Error: Input/output error".
>
>I'm fairly sure the RX line is correctly soldered. I've used a
>multi-meter when the board was powered down to check pins 2, 3, 5, and
>sheild of the 9 pin female connector to the lines on the=20
>tweener PCB and
>everything seems to connected appropriately.=20
>
>Can anyone suggest a course of action. Given that the cable I made up
>seems to be fine, and that PC->gumstix clearly works, I'm at a loss for
>why the reverse path isn't working.
>
>Thanks in advance,
>
>-- Michael
>
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