no operation when no connection ST-linker/v2 debugger

[Lee Young Jun]

Posted on March 06, 2018 at 10:58

Hello, I'm STM8S user.

my ask is why that mcu is no operation when no connection of st-link debugger.

If i'm doing downloading the Hex file in the mcu, so mcu is operating, But ejecting the st-link debugger at the PC,

mcu is no operation.

[Tesla DeLorean]

Posted on March 06, 2018 at 16:18

So either you have an external pin changing the boot mode, or your code doesn't initialize something (clock, GPIO, etc) that the debugger does.