So as the directory one level up mentioned this is a jtag solution
where a bit banged back end to open ocd is sent over a serial port
to a microcontroller board.

This microcontroller board:
http://ti.com/launchpad
or
http://www.sparkfun.com/products/10020

From the top of my raspberry pi repo refer to the README file and
maybe the armjtag directory and one of the uart directories.  You are
looking for info on the wire you need to solder to the raspberry pi
for jtag.  As well as the usb to serial or serial level shifter you
need to talk 3.3V levels to the uart in the msp430.  You will want
two now one for talking to the msp430 the other for talking to the
raspberry pi.  both use 3.3V serial interfaces.

So first get the openocd sources, in openocd/src/jtag/drivers/ backup
the original parport.c and replace it with the one you find here.
The serial port itself is hardcoded so you might want to work around
that or at least remember to change it to match your computer/setup.

If you use git for the cutting edge openocd sources then the first
step is

./bootstrap

which basically creates the configure script, then

./configure --enable-parport
make

openocd.texi:12: @include `version.texi': No such file or directory.
openocd.texi:37: warning: undefined flag: VERSION.
openocd.texi:38: warning: undefined flag: UPDATED.
openocd.texi:58: warning: undefined flag: VERSION.
openocd.texi:59: warning: undefined flag: UPDATED.

Now when it WORKS, my make fails with the above close to the last thing
output.  If there is a file src/openocd then you have the tool.
Now I dont make install because it will overwrite the one I use with
the amontec or other openocd supported usb based device.


I have provided a binary as well as sources for the msp430 portion.
You will need an msp430 launchpad with the msp430g2553 chip on it.
You will want to download and/or otherwise install mspdebug.

To program the msp430 board, plug it into your computer (usb cable)
then

mspdebug rf2500

when that comes up to a prompt

> prog out.hex
> exit


You will need to use the raspi.cfg file in this directory not the
one in the armjtag directory.

/path/to/openocd/src/openocd -f raspi.cfg
Open On-Chip Debugger 0.6.0-dev-00611-g6d639b0-dirty (2012-07-06-22:00)
Licensed under GNU GPL v2
For bug reports, read
    http://openocd.sourceforge.net/doc/doxygen/bugs.html
Warn : Adapter driver 'parport' did not declare which transports it allows; assuming legacy JTAG-only
Info : only one transport option; autoselect 'jtag'
1000 kHz
none separate
raspi.arm
Info : clock speed 500 kHz
Info : JTAG tap: raspi.arm tap/device found: 0x07b7617f (mfg: 0x0bf, part: 0x7b76, ver: 0x0)
Info : found ARM1176
Info : raspi.arm: hardware has 6 breakpoints, 2 watchpoints

That means it worked!

see the armjtag directory for more info on what to do now.