I changed the clock to maximum 480Mhz, after I F5 for the first time, I unable to burn any program to it again. To solve this, press both reset and boot buttons on the board, click F5 in STM32CubeIDE, then release reset button (still hold the bott button). It will successfully burn the program again. And remember to run "st-flash erase" for full chip erase, then you can burn your program without pressing any button on board.

2025/07/23 by admin