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op1hacks / op1repacker

🗜 Tool for unpacking, modifying and repacking firmware for the OP-1 synth by Teenage Engineering.
MIT License
284 stars 18 forks source link

op-z unpack? #21

Closed devn closed 5 years ago

devn commented 5 years ago

I attempted to unpack the op-z firmware by removing the first 4 bytes and unpacking with lzma, but something has changed. I'm not sure if the CRC has changed, or whether it's a different compression format. Any tips on how to comb headers to determine the type?

Thanks in advance!

devn commented 5 years ago

Unfortunately, it looks like this is going to be a tough one to figure out. I believe TobascoEye (is this you, by any chance?) in the thread here is correct, the op-z firmware that TE distributes is encrypted.

I've read over all of the docs at https://www.analog.com/en/products/adsp-bf703.html#product-documentation, and nothing sticks out on my first read, however, I think that the OP-Z's bluetooth LE connection, and upcoming modules may provide an opportunity to retrieve the PK from the device or otherwise dump firmware.

richrd commented 5 years ago

Hi! I haven't looked into the OP-Z firmware yet, so I can't really say anything. And no, I'm not TabascoEye, I'm wavi on the forums. TabascoEye has more firmware skills than I so he might be able to figure something out!

If the firmware is cracked open at some point I would happily write a tool to automate that :)

richrd commented 5 years ago

If the OP-Z firmware is successfully unpacked, it'll probably make the most sense to write a separate tool to handle that, so I'm closing this for now.