Sign in to follow this  
Followers 0
PurpleJesus

Can the AVR_Dragon JTAG non AVR stuff?

4 posts in this topic

I bought a cheap Rosewill RNX-GX4 router from newegg the other day when it was damn cheap.

I was trying to make it into a universal wireless repeater. Had it working as a repeater, then tried to make it Universal.

Bricked it.

Lights come on, but nothing from the ethernet or wifi. Wiresharked it, and my laptop tried to get an address, I can see the lights on the router wink when it asks, but no reply ever comes back

Opened it up, and found what looks like it could be a JTAG port. Even found some info that it is, and the pinouts to try. Took a multimeter and tested the pin voltages and they were right (2 were 3.3, 2 were gnd).

I have an AVR_Dragon sitting around here. It says it can do JTAG. I'm on linux and have avrdude installed. When I try to set it in jtag mode I need a part number. The part numbers I have to choose from are all AVR chips.

Does anyone know how I could create a new 'part number' of this router so I can copy the firmware and everything else off a good router (I bought 2) and copy it over to the bricked one?

I've googled, but can't find anything about using the Avr_Dragon to jtag non AVR stuff.

0

Share this post


Link to post
Share on other sites

You can use the AVR Dragon to send information over JTAG in the purpose of programming a chip.

But you can also simply use JTAG without the AVR Dragon, it may be simpler in fact.

I assume that you dont want to use avrdude on a non-AVR chip, that would be stupid.

If you want to program a PIC, you can use your JTAG (check specs) but I recommend getting some AVRs.

0

Share this post


Link to post
Share on other sites

You can use the AVR Dragon to send information over JTAG in the purpose of programming a chip.

But you can also simply use JTAG without the AVR Dragon, it may be simpler in fact.

I assume that you dont want to use avrdude on a non-AVR chip, that would be stupid.

If you want to program a PIC, you can use your JTAG (check specs) but I recommend getting some AVRs.

Appreciate it. I have some AVR chips already. I just was wondering if I could use the Dragon to reflash the router since I already have one. I have no experience in JTAGing anything.

I had almost forgotten about this project. I need to figure out where those routers got off too.. I know there in this room -somewhere-.

0

Share this post


Link to post
Share on other sites

You can use the AVR Dragon to send information over JTAG in the purpose of programming a chip.

But you can also simply use JTAG without the AVR Dragon, it may be simpler in fact.

I assume that you dont want to use avrdude on a non-AVR chip, that would be stupid.

If you want to program a PIC, you can use your JTAG (check specs) but I recommend getting some AVRs.

Appreciate it. I have some AVR chips already. I just was wondering if I could use the Dragon to reflash the router since I already have one. I have no experience in JTAGing anything.

I had almost forgotten about this project. I need to figure out where those routers got off too.. I know there in this room -somewhere-.

1) Find your router.

2) Open it properly using screwdrivers.

3) Take high-definitions pictures of the board(s)

4) Upload the pictures somewhere.

5) Reply with links

Philkill

0

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0