I guess if you manage to install some code that dumps the flash via serial, and put it in the top page of flash, ( if its possible to write to that area of flash), you may be able to get the code to crash and execute the dumping code, but it seems unlikely. But I cant recall if you can set the PC and then perhaps run from that location. The trick where you change the PC address, works on some chips, including the Nordic nRF51822, but I tried it on the STM32 a few months ago, and it does not work.Īctually, what I tried was setting the PC and then single stepping in the debugger, and I know that does not work. Its a Mac Mini-like compact system, with an Intel processor and a. Gotek Drive with OLED screen and Flash Floppy firmware. the PC when read protection is enabled, in fact most SWD functions are disabled. This is an experimental online Amiga emulator powered using pure HTML5 and JavaScript. Run classic Apple Macintosh, Atari ST, and Atari 8-bit software. I am not sure if you can even upload to empty pages of flash with read protection enabled.It may be possible via swd but not by the bootloaoder.Īlso, I dont think you can alter the registers e.g. You may find you cant upload to RAM at all with read protection enabled. Victor, I like the idea of dumping the code simply by uploading and running from ram, but I suspect that STM would have thought of that possibility. The flash can be read by the code running in the MCU itself, so you can try finding a portion of flash that's not used (difficult since you can't read it, but if you someway know how big is the software running in the MCU, then you know what's free), then compile a flash dumper sketch to that address, write it there (you can write with readout protection, you just can't read or verify), then execute it by forcing the PC to the start address.Īnother option, which I tried to test but didn't get it right, was to compile such sketch to run from RAM, upload it to RAM (st-link or j-link can do that), then reboot the MCU with the boot pins set for boot from RAM. If the board is obsolete, your best bet is to approach the manufacturer and see if they will see you the binary firmware file.

RogerClark wrote:The STM32 has strong firmware readback protection to stop counterfeiter reading the firmware binary file and putting it into their cloned products.Įxtracting the firmware from inside the chip is not an option for hobbyists, and is basically uneconomic for virtually anyone else.

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