Be warned that incorrect usage can lead to a point of no return
situation. Before you do anything besides what is described here, please
do research on how to use this tool. A good starting point is the
excellent and cautionary
guide.pdf written by the HairyDairyMaid, the
original author. Always backup before flashing.
- A Raspberry Pi (I've only tested model B as of late 2013)
- Dual female jumper wires to connect GPIO pins to WRT
- Pins soldered on the JTAG header on WRT
- Beverege to enjoy afterward
Hook up the two boards as per the diagram in
Power up your WRT
Checkout the code, compile and run it
$ cd ~ $ git clone email@example.com:oxplot/tjtag-pi.git $ cd tjtag-pi $ make pi $ ./tjtag -probeonly
If it gets stuck, try using
If at this point, your SoC and flash is recognized, you're all set. Enjoy your beverage and look for an appropriate guide that explains how to use tjtag to revive/upgrade your router's firmware.
- If you have issues with reliability of your connection, you can slow
down the speed of tjtag by using
/delay:Ncommand line option.
Nis the amount of time to delay flipping the clock signal. The higher the value, the slower the transfer rate.
- Due to bit-banging nature of the operation of tjtag, various things
affect the transfer speed. The one with most degrading effect is the
progress output. Therefore it is recommended to use
/silentcommand line option and redirect outputs to
&> /dev/null), after having made sure everything works OK.