Cannot erase/program flash using jtag

deckhard · ‎2021-02-04

Hi

I've set the jtag pins in my code to analog input (non intentionally) .

While I was able to connect to Device (STM32H743) after I managed to erase the flash option bytes (with mass erase) using j-link stm32 tool (No St-Link option or SWD for me on the device), I can not preform chip erase or program (getting ram code error -5)

Any ideas?

Thanks!

Uwe Bonnes · ‎2021-02-04

Try with connect under reset and reset connected. Try other debuggers.

deckhard · ‎2021-02-05

Tried that... perhaps changing boot0 pin to pullup and boot to sram would help? how can I boot into the system bootloader?

Uwe Bonnes · ‎2021-02-05

Connect under reset, with reset connected, should work! If it does not work, recheck your setup (Use cable, cables, Connectores, etc). Otherwise a pulse on Reset with Boot0 = 1 should bring you into the bootloader.