I am trying to log into the connex200 board via a home-made serial line.
I purchased the Robostix-Wifi pack. I thought I could be clever by
rigging up my own serial connection as mentioned in part on the wiki
(http://docwiki.gumstix.org/Robostix_I/O_pins#UARTS). I'm using the
FFUART labeled "GUMSTIX" on the Robostix board.
Story time: I purchased a USB to serial connector (DB-9) and a DB-9
female connector from RadioShack (Model/Catalog Numbers: 26-183 and
276-1538 respectively). Using some 30-gauge wire and a steady hand
(I'm sorry there are no stores near me that sell female header pins as
well), I soldered a wire to pin 3 (as labeled on the DB-9) and
wire-wrapped to GUMSTIX4 on the robostix. The wiki page
(http://docwiki.gumstix.org/Robostix_I/O_pins#UARTS) declares this as
RxD. Since we're using the RS-232 standard, I followed the pin-out on
this page for the DB-9 female connector:
that is where transmitted data is being sent. Likewise, I connected
the pin 2 on the DB-9 wire to GUMSTIX 2: the TxD line. Finally, I
wired GND: the robotstix GUMSTIX1 to the DB-9 pin 5. All other pins
are not connected.
I connected the gumstix and the robostix and wifi together in the only
configuration possible. I then installed the USB to serial connector
on my Windows XP (ug... why doesn't FreeBSD 6.1 support this!? ;-) ).
I then launched hyper terminal and set it up as directed by the
Support Wiki article "Connecting with Serial (Windows)":
I punched in all the connection information, connected the cable to
the DB-9, and plugged the 5V adapter into the Robostix (NOT the
wifistix, and never have). I waited approximately 5 minutes and saw
nothing appear on the screen. I hit the reset button (held for 10
seconds) and released it and still received no information after 5
minutes. I even had a friend hold it down while I plugged in the
I verified the USB to serial cable by using a paper-clip (Yes yes, I
know... very ghetto) to bridge the Rx/Tx lines (2 and 3) and typing
into the terminal (at this point, the robostix was disconnected). My
characters were echo'ed back successfully. However, I still cannot
see any bootup information nor a login prompt. I used my multimeter
and verified the continuity of all 3 connections from the robostix
pins to the pins on the DB-9 (on the side where the male plug makes
contact). I have tried removing the wifi-stix and running it with
just the robostix and the connex to no avail. I have made no other
modifications to any of the boards except what I mentioned above.
These boards are all brand-new (as of last Wednesday).
Given all that, is there any reason why I cannot see the console
information and login prompt? I'm stumped and as you can see, I've
tried just about everything I can think of and I welcome any sane
Los Angeles, California, USA