So I recently bought the STM32F103C8T6 "black pill" dev board along with the ST-LINK/V2 dongle (more probably a Chinese clone). After much struggling I figured out that I need to hold down the dev board's reset button for the dongle to detect the MCU but then when I connected the dongle to my STM32F429 Discovery board, it detected the F429 without having to hold down reset.
I know the connection process has a "Connect with reset" option where you connect a reset pin to the board and the dongle does the hard reset for you, but I monitored the pin and it doesn't do the reset (probably a Chinese flaw?).
It's not the end of the world, it's just weird that the 103 needs to be in reset to connect, but the 429 doesn't. The 103's SWD pins aren't assigned other functions so that's not the issue. Any insight would be greatly appreciated.
Why do I need to have the 103 in reset and not the 429?