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  • For the record, I accidentally reconfigured my SWD pins with this innocuous statement: GPIOA->MODER = 0x00005555;

  • As I discovered just now, the error is not caused by reaching a breakpoint, but by reaching a certain, unknown code position. In other words, the error occurs even without any breakpoints. What code error causes J-Link to fail? And is there an option option I could disable to not trip up the debugger? Why is it trying to read registers when code is just executing without being debugged?

  • I'm trying to debug some code running on a STM32F722 on a custom board with J-Link EDU. My IDE is Atollic Studio. Flashing code with J-Link is absolutely no problem. But when I try to debug, J-Link won't stop at all breakpoints. In fact, it will stop at breakpoints set in main.c or functions called by main.c, but not in functions that have been triggered by an external interrupt. I've been trying to resolve this for over a week now, but I simply cannot find any reason for this. Personally, I sus…