Progress report

[kiler129]

Hi!

I stumbled upon your repo thinking about doing RE myself. I have a few questions:

1. Did you trace or figure out any pins from the debug connector?
2. Do you have a photo of how to get to the debug connector? I have a feeling it may be simply a JTAG.
3. Did you try connecting to UART while in service mode? ;)
4. Have you considered dumping the flash chip directly? It most likely runs something like FreeRTOS.

[banoz]

That's JTAG certainly. Also here's a post about the display, it's ST7701 with ST1633 touch.

[emptynick]

Sorry i didnt catch the notification for your issue.
Actually I found a document containing all electrical schematics for the Touch just today but I'm not 100% sure that I can just share it here.
Happy to share some things when needed tho.
The 20 pin debug port is simply a STM SWD debug port so you can hook up an stlink pretty easy.

I also updated the readme with a bit more info.

@banoz I don't think it's a ST7701 as it doesn't seem to support the vertical resolution of 272px but I could be wrong and the actual resolution is bigger.

[banoz]

If you want to play with TouchGFX I drafted the IOC for BBT here. I don't actually own BBT so it's just based on the schematics, yet to be tested by someone.

There's another BBT owner who wants to make a custom FW, you can get in touch with on Gaggiuino Discord.