A quick search leads to https://github.com/flipperdevices/blackmagic-esp32-s2 , I imagine it won't take much, if any, modification to run this on an ESP32S3.

The ELF file contains all the results from the compilation process - not only the code but also debug symbols, filenames and lots of other stuff that is not needed for execution. You want to look at the generated .bin file - that is what actually gets flashed to the ESP.

I'd see it the other way around: if the pins are output the ESP32 can control what is on them and make sure it never activates the PSRAM.

CCooper1971 wrote: ↑

Thu Dec 07, 2023 4:30 pm

Not sure how to do that specifically.

You probably want https://github.com/me-no-dev/EspExceptionDecoder .

Sorry, no. Later versions of the USB-serial-JTAG peripheral (the one in the C6 and iirc H2) have a function that can do that, but the S3 doesn't.

Or you can read the USB specification docs; it's an open specification so no need to reverse-engineer.

Ah, sorry, I was looking at the wrong picture.

Kinda, with care? Those pins are used for the CS and CLK of the internal PSRAM. If you make CS low and pulse CLK, it'll sample any values that happen to be on the data pin (which is shared with flash, so you can control it) and interpret that as a command. That command can make the PSRAM output data...

rodrik5000 wrote: ↑

Thu Dec 07, 2023 1:55 am

Hi, Thank you for the reply, I need 1k-2K pcs. minimum every month, At command firmware downloaded. Thank you

As I said, please contact sales@espressif.com for this.

Okay. Can you decode that backtrace?