STM32F030K6T6 can only be programed with ST-LINK once

Posted on February 04, 2015 at 17:04

Getting a processor under control via SWD/JTAG is a relatively long and complex process. My understanding of ''connect under reset'' is that it tries to do this while holding the core in reset so it doesn't run any/much of the code.

I have very narrow insight into exactly what you're doing, in the general sense I see sloppy programming of the GPIO, or other peripherals, with blind register writes where the original content is just over written. ie GPIOA->MODER = 0;

Posted on February 05, 2015 at 08:10

yes, I have fixed the problem, the code have configured PA13/PA14 as analog, so the SWD function is prohibited.

Thank you again for your warmly support.